Service Instructions

Service Manual - Daikin

equipment specified in this manual should service the equipment. ... S-306. Gas Pressure. •. • • • Check Gas Pressure ... DET. ERMINED BY. THE SUM O.

Service Instructions

Service Instructions - Daikin

3 -6 ton. √. 28. 0270L01165. OA2-DKN12CA-W00S. 2 Position Motorized Damper. 3-6 ton. √. 40. 0270L01166. OAM-DKN12-W000. Manual Outdoor Air Damper. 3-6 ton.

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rsd6412022

Service Instructions
DRG Gas Electric/DRC Cooling/DRH Heat Pump Commercial Package Units With R-410A Refrigerant 3-6 Tons & Accessories

PROP 65 WARNING FOR CALIFORNIA CONSUMERS
WARNING

Cancer and Reproductive Harm www.P65Warnings.ca.gov

0140M00517-A

WARNING
Only personnel that have been trained to install, adjust, service or repair(hereinafter, "service") the equipment specified in this manual should service the equipment. The manufacturer will not be responsible for any injury or property damage arising from improper service or service procedures. If you service this unit, you assume responsibility for any injury or property damage which may result. In addition, in jurisdictions that require one or more licenses to service the equipment specified in this manual, only licensed personnel should service the equipment. Improper installation, adjustment, servicing or repair of the equipment specified in this manual, or attempting to install, adjust, service or repair the equipment specified in this manual without proper training may result in product damage, property damage, personal injury or death.

This manual is to be used by qualified, professionally trained HVAC technicians only. Daikin does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.
Copyright © 2021

RSD6412022 January 2021

IMPORTANT INFORMATION

TABLE OF CONTENTS

IMPORTANT NOTICES

Important Information......................................... 2 Product Identification........................................... 4 Accessories............................................................. 6 System Operation................................................. 20 Servicing Table Of Contents................................. 43 Servicing............................................................... 44 Unit Wiring Diagram........................................... 77 Accessories Wiring Diagram................................ 86 Heater Kits............................................................ 99 Heater Kits Wiring Diagram............................... 100 Scheduled Maintenance..................................... 112

Recognize Safety Symbols, Words And labels
Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.

WARNING
To prevent the risk of property damage, personal injury, or death, do not store combustible materials or use gasoline or other flammable liquids or vapors in the vicinity of this appliance.
WARNING
HIGH VOLTAGE Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
WARNING
This unit should not be connected to, or used in conjunction with, any devices that are not design certified for use with this unit or have not been tested and approved by the manufacturer. Serious property damage or personal injury, reduced unit performance and/or hazardous conditoins may result from the use of devices that have not been approved or certified by the manufacturer.
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact:
CONSUMER INFORMATION LINE - DAIKIN BRAND PRODUCTS
TOLL FREE 1-855-770-5678 (U.S. only) email us at: customerservice@daikinac.com
fax us at: (713) 856-1821 (Not a technical assistance line for dealers.)
Outside the U.S., call 1-713-861-2500 (Not a technical assistance line for dealers.) Your telephone company will bill you for the call.
2

IMPORTANT INFORMATION

Safe Refrigerant Handling While these items will not cover every concievable situation, they should serve as a usefull guide.
WARNING
Refrigerants are heavier than air. They can "push out" the oxygen in your lungs or in any enclosed space. To avoid possible difficulty in breathing or death:
· Never purge refrigerant into an enclosed room or space. By law, all refrigerant must be reclaimed.
· If an indoor leak is suspected, thoroughly ventilate the area before beginning work.
· Liquid refrigerant can be very cold. To avoid possible frostbite or blindness, avoid contact with refrigerant and wear gloves and goggles. If liquid refrigerant does contact your skin or eyes, seek medical help immediately.
· Always follow EPA regulations. Never burn refrigerant, as posionous gas will be produced.
WARNING
To avoid possible injury, explosion or death, practice safe handling of refrigerants.
WARNING
The compressor poe oil for R-410A units is extremely susceptible to moisture absorption and could cause compressor failure. Do not leave system open to atmosphere any longer than necessary for installation.
WARNING
To avoid possible explosion: · Never apply flame or steam to a refrigerant cylinder. If you must heat a cylinder for faster charging, partially immerse it in warm water. · Never fill a cylinder more than 80% full of liquid refrigerant. · Never add anything other than R-22 to an R-22 cylinder or R-410A to an R-410A cylinder. The service equipment used must be listed or certified for the type of refrigerant used. · Store cylinders in a cool, dry place. Never use a cylinder as a platform or a roller.
WARNING
To avoid possible explosion, use only returnable (not disposable) service cylinders when removing refrigerant from a system.
· Ensure the cylinder is free of damage which could lead to a leak or explosion.
· Ensure the hydrostatic test date does not exceed 5 years.
· Ensure the pressure rating meets or exceeds 400 lbs.
When in doubt, do not use cylinder.

WARNING
System contaminants, improper service procedure and/or physical abuse affecting hermetic compressor electrical terminals may cause dangerous system venting.
The successful development of hermetically sealed refrigeration compressors has completely sealed the compressor's moving parts and electric motor inside a common housing, minimizing refrigerant leaks and the hazards sometimes associated with moving belts, pulleys or couplings.
Fundamental to the design of hermetic compressors is a method whereby electrical current is transmitted to the compressor motor through terminal conductors which pass through the compressor housing wall. These terminals are sealed in a dielectric material which insulates them from the housing and maintains the pressure tight integrity of the hermetic compressor. The terminals and their dielectric embedment are strongly constructed, but are vulnerable to careless compressor installation or maintenance procedures and equally vulnerable to internal electrical short circuits caused by excessive system contaminants.
In either of these instances, an electrical short between the terminal and the compressor housing may result in the loss of integrity between the terminal and its dielectric embedment. This loss may cause the terminals to be expelled, thereby venting the vaporous and liquid contents of the compressor housing and system.
A venting compressor terminal normally presents no danger to anyone, providing the terminal protective cover is properly in place.
If, however, the terminal protective cover is not properly in place, a venting terminal may discharge a combination of
A. hot lubricating oil and refrigerant B. flammable mixture (if system is contaminated
with air) in a stream of spray which may be dangerous to anyone in the vicinity. Death or serious bodily injury could occur.
Under no circumstances is a hermetic compressor to be electrically energized and/or operated without having the terminal protective cover properly in place.
See Service Section S-17 for proper servicing.
3

PRODUCT IDENTIFICATION

NOMENCLATURE

The model number is used for positive identification of component parts used in manufacturing. Please use this number when requesting service or parts information.

PRODUCT IDENTIFICATION

NOMENCLATURE

· Stainless-Steel Heat Exchanger (Gas only units): A tubular heat exchanger made of 409-type stainless steel is installed in the unit.
· Economizers (Downflow): Based on air conditions, can provide outisde air to cool the space.
· Electric Heat Kits (heat pump and cooling units only): Available in all voltage options.
· Non-powered Concenience Outlet: A 120V, 15A, GFCI outlet makes it easier for technicians to service the unit once an electrician runs power to the outlet.
· Powered Concenience Outlet: A 120V, 15A, GFCI outlet powered with a transformer built into the unit. When a factory-installed powered convenience outlet is installed in the equipment, the unit MCA (Min. Circuit Ampacity) will increase by 7.5A for 208/230V units, increase by 3.75A for 460V units, and by 3A for 575V units. The MOP (Max. Overcurrent Protection) device must be sized accordingly.
· Disconnect Switch (non-fused; 3-phase units only:) A disconnect switch is installed in the unit and factory wiring will be complete from the switch to the unit. Please note that for air conditioning and heat pump models, the appropriate electric heat kit must be ordered to be factory-installed along with the disconnect switch (non-fused) when it is ordered. Please note that for models with a powered convenience outlet option and a disconnect switch (non-fused) option, the power to the powered concenience outlet will be shut off when the disconnect switch (non-fused) is in the off position.
· Return Air and/or Supply Air Smoke Detectors: Return air and/or supply air smoke detectors are installed in the unit.

· Hinged Access Panels: Allows access to unit's major components. Combined with latches for easy access to control box, compressor, filters and blower motor. Available on all units.
· Two-speed indoor fan blower models are available on 6, 71/2, 81/2, 10, 121/2, 15, 20 & 25 ton units. Section 6.4.3.10.b of ASHRAE Standard 910.1-2010 and Section 6.5.3.2.1.a of ASHRAE Standard 90.1-2013 require a minimum of two fan speeds. Section 140.4(m)1 of California Energy Commission Title 24 2013 cibtaubs a similar provision. When the units with the two-speed infoor fan blowers operate on a call for the first stage of cooling, the fan operates at low speed, which is 66% of full speed. When the units operate on a call for the second stage of cooling, the fan operates at full speed. In heating operation, the fan operates at full speed. During ventilation operation, the fan operates at low speed.
· Return Air and/or Supply Air Smoke Detectors: Return air and/or supply air smoke detectors are installed in the unit.
· Hinged Access Panels: Allows access to unit's major components. Combined with latches for easy access to contol box, compressor, filters and blower motor. Available on all models.
· Phase Monitor: Phase monitor (3 phase only), available for 3-25 ton DB and DR series models. Phase monitor shall provide protection for motors and compressors against problems caise by phase loss, phase reversal and phase unbalance. Phase monitor is equipped with an LED that provides an ON or FAULT indicator.

ACCESSORIES

Daikin Master Item #

Vendor P/N Ref

Electric Heat Kits EHXD-1S05FI EHXD-1S10FI EHXD-1S15FI EHXD-1S16FI EHXD-1S22FI EHXD-3S05FI EHXD-3S10FI EHXD-3S15FI EHXD-3S16FI EHXD-3S20FI EHXD-3S21FI EHXD-3S22FI EHXD-3S30FI EHXD-3S31FI EHXD-4S05FI EHXD-4S10FI EHXD-4S15FI EHXD-4S16FI EHXD-4S20FI EHXD-4S21FI EHXD-4S22FI EHXD-4S30FI EHXD-4S31FI EHXD-7S05FI EHXD-7S10FI EHXD-7S15FI EHXD-7S16FI EHXD-7S20FI EHXD-7S21FI EHXD-7S22FI EHXD-7S30FI EHXD-7S31FI EHSD-1S05FI EHSD-1S10FI EHSD-1S15FI EHSD-1S16FI EHSD-1S22FI EHSD-3S05FI EHSD-3S10FI EHSD-3S15FI EHSD-3S16FI EHSD-3S20FI EHSD-3S21FI EHSD-3S22FI EHSD-3S30FI EHSD-3S31FI EHSD-4S05FI EHSD-4S10FI EHSD-4S15FI EHSD-4S16FI EHSD-4S20FI EHSD-4S21FI EHSD-4S22FI EHSD-4S30FI EHSD-4S31FI EHSD-7S05FI EHSD-7S10FI EHSD-7S15FI EHSD-7S16FI EHSD-7S20FI EHSD-7S21FI EHSD-7S22FI EHSD-7S30FI EHSD-7S31FI EHXD-1S05 EHXD-1S10 EHXD-1S15 EHXD-1S16 EHXD-1S22 EHXD-3S05 EHXD-3S10 EHXD-3S15

6000-147-205 6000-147-210 6000-147-215 6000-151-216 6000-147-222 6000-147-305 6000-147-310 6000-147-315 6000-151-316 6000-147-320 6000-151-320 6000-151-322 6000-147-330 6000-151-331 6000-147-405 6000-147-410 6000-147-415 6000-151-416 6000-147-420 6000-151-420 6000-151-422 6000-147-430 6000-151-431 6000-147-605 6000-147-610 6000-147-615 6000-151-616 6000-147-620 6000-151-620 6000-151-622 6000-147-630 6000-151-631 6000-148-205 6000-148-210 6000-148-215 6000-152-216 6000-148-222 6000-148-305 6000-148-310 6000-148-315 6000-152-316 6000-148-320 6000-152-320 6000-152-322 6000-148-330 6000-152-331 6000-148-405 6000-148-410 6000-148-415 6000-152-416 6000-148-420 6000-152-420 6000-152-422 6000-148-430 6000-152-431 6000-148-605 6000-148-610 6000-148-615 6000-152-616 6000-148-620 6000-152-620 6000-152-622 6000-148-630 6000-152-631 6000-147-205 6000-147-210 6000-147-215 6000-151-216 6000-147-222 6000-147-305 6000-147-310 6000-147-315

Description
Electric Heat Kit Factory Installed, 5 KW - 240V - 1PH Electric Heat Kit Factory Installed, 10 KW - 240V - 1PH Electric Heat Kit Factory Installed, 15 KW - 240V - 1PH Electric Heat Kit Factory Installed, 15 KW - 240V - 1PH Electric Heat Kit Factory Installed, 20 KW - 240V - 1PH Electric Heat Kit Factory Installed, 5 KW - 240V - 3PH Electric Heat Kit Factory Installed, 10 KW - 240V - 3PH Electric Heat Kit Factory Installed, 15 KW - 240V - 3PH Electric Heat Kit Factory Installed, 15 KW - 240V - 3PH Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH Electric Heat Kit Factory Installed, 30 KW - 240V - 3PH Electric Heat Kit Factory Installed, 30 KW - 240V - 3PH Electric Heat Kit Factory Installed, 5 KW - 480V - 3PH Electric Heat Kit Factory Installed, 10 KW - 480V - 3PH Electric Heat Kit Factory Installed, 15 KW - 480V - 3PH Electric Heat Kit Factory Installed, 15 KW - 480V - 3PH Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH Electric Heat Kit Factory Installed, 30 KW - 480V - 3PH Electric Heat Kit Factory Installed, 30 KW - 480V - 3PH Electric Heat Kit Factory Installed, 5 KW - 600V - 3PH Electric Heat Kit Factory Installed, 10 KW - 600V - 3PH Electric Heat Kit Factory Installed, 15 KW - 600V - 3PH Electric Heat Kit Factory Installed, 15 KW - 600V - 3PH Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH Electric Heat Kit Factory Installed, 30 KW - 600V - 3PH Electric Heat Kit Factory Installed, 30 KW - 600V - 3PH Electric Heat Kit Factory Installed, 5 KW - 240V - 1PH W/SCR Electric Heat Kit Factory Installed, 10 KW - 240V - 1PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 240V - 1PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 240V - 1PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 240V -1PH W/SCR Electric Heat Kit Factory Installed, 5 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 10 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 240V - 3PH W/SCR Electric Heat Kit Factory Installed, 5 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 10 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 480V - 3PH W/SCR Electric Heat Kit Factory Installed, 5 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 10 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 15 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 20 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 600V - 3PH W/SCR Electric Heat Kit Factory Installed, 30 KW - 600V - 3PH W/SCR Electric Heat Kit, 5 KW - 240V - 1PH Electric Heat Kit, 10 KW - 240V - 1PH Electric Heat Kit, 15 KW - 240V - 1PH Electric Heat Kit, 15 KW - 240V - 1PH Electric Heat Kit, 20 KW - 240V - 1PH Electric Heat Kit, 5 KW - 240V - 3PH Electric Heat Kit, 10 KW - 240V - 3PH Electric Heat Kit, 15 KW - 240V - 3PH

DRC-DD 3-6 TON (HELC AC)

Fits Model Field Factory Operating Size Installed Installed Weight, lb

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

ACCESSORIES

Daikin Master Item #

Vendor P/N Ref

Electric Heat Kits

EHXD-3S16

6000-151-316

EHXD-3S20

6000-147-320

EHXD-3S21

6000-151-320

EHXD-3S22

6000-151-322

EHXD-3S30

6000-147-330

EHXD-3S31

6000-151-331

EHXD-4S05

6000-147-405

EHXD-4S10

6000-147-410

EHXD-4S15

6000-147-415

EHXD-4S16

6000-151-416

EHXD-4S20

6000-147-420

EHXD-4S21

6000-151-420

EHXD-4S22

6000-151-422

EHXD-4S30

6000-147-430

EHXD-4S31

6000-151-431

EHXD-7S05

6000-147-605

EHXD-7S10

6000-147-610

EHXD-7S15

6000-147-615

EHXD-7S16

6000-151-616

EHXD-7S20

6000-147-620

EHXD-7S21

6000-151-620

EHXD-7S22

6000-151-622

EHXD-7S30

6000-147-630

EHXD-7S31

6000-151-631

EHSD-1S05

6000-148-205

EHSD-1S10

6000-148-210

EHSD-1S15

6000-148-215

EHSD-1S16

6000-152-216

EHSD-1S22

6000-148-222

EHSD-3S05

6000-148-305

EHSD-3S10

6000-148-310

EHSD-3S15

6000-148-315

EHSD-3S16

6000-152-316

EHSD-3S20

6000-148-320

EHSD-3S21

6000-152-320

EHSD-3S22

6000-152-322

EHSD-3S30

6000-148-330

EHSD-3S31

6000-152-331

EHSD-4S05

6000-148-405

EHSD-4S10

6000-148-410

EHSD-4S15

6000-148-415

EHSD-4S16

6000-152-416

EHSD-4S20

6000-148-420

EHSD-4S21

6000-152-420

EHSD-4S22

6000-152-422

EHSD-4S30

6000-148-430

EHSD-4S31

6000-152-431

EHSD-7S05

6000-148-605

EHSD-7S10

6000-148-610

EHSD-7S15

6000-148-615

EHSD-7S16

6000-152-616

EHSD-7S20

6000-148-620

EHSD-7S21

6000-152-620

EHSD-7S22

6000-152-622

EHSD-7S30

6000-148-630

EHSD-7S31

6000-152-631

Duct Smoke Detectors

SDRKTP1FIS3

N/A

SDSKTP1FIS3

N/A

SDCKTP1FIS3

N/A

Non-Fused Disconnect Switches

DSC060A54YH01FI

N/A

DSC100A54YH01FI

N/A

DSC150A54YH01FI

N/A

Convenience Outlets

CONVOUTP36722

N/A

CONVOUTP36724

N/A

CONVOUTP36727

N/A

CONVTOUTNP036072 N/A

Hinged Access Panels

HGDRSM01FI

N/A

HGDRSM02FI

N/A

HGDRSM03FI

N/A

Description
Electric Heat Kit, 15 KW - 240V - 3PH Electric Heat Kit, 20 KW - 240V - 3PH Electric Heat Kit, 20 KW - 240V - 3PH Electric Heat Kit, 20 KW - 240V - 3PH Electric Heat Kit, 30 KW - 240V - 3PH Electric Heat Kit, 30 KW - 240V - 3PH Electric Heat Kit, 5 KW - 480V - 3PH Electric Heat Kit, 10 KW - 480V - 3PH Electric Heat Kit, 15 KW - 480V - 3PH Electric Heat Kit, 15 KW - 480V - 3PH Electric Heat Kit, 20 KW - 480V - 3PH Electric Heat Kit, 20 KW - 480V - 3PH Electric Heat Kit, 20 KW - 480V - 3PH Electric Heat Kit, 30 KW - 480V - 3PH Electric Heat Kit, 30 KW - 480V - 3PH Electric Heat Kit, 5 KW - 600V - 3PH Electric Heat Kit, 10 KW - 600V - 3PH Electric Heat Kit, 15 KW - 600V - 3PH Electric Heat Kit, 15 KW - 600V - 3PH Electric Heat Kit, 20 KW - 600V - 3PH Electric Heat Kit, 20 KW - 600V - 3PH Electric Heat Kit, 20 KW - 600V - 3PH Electric Heat Kit, 30 KW - 600V - 3PH Electric Heat Kit, 30 KW - 600V - 3PH Electric Heat Kit, 5 KW - 240V - 1PH W/SCR Electric Heat Kit, 10 KW - 240V - 1PH W/SCR Electric Heat Kit, 15 KW - 240V - 1PH W/SCR Electric Heat Kit, 15 KW - 240V - 1PH W/SCR Electric Heat Kit, 20 KW - 240V -1PH W/SCR Electric Heat Kit, 5 KW - 240V - 3PH W/SCR Electric Heat Kit, 10 KW - 240V - 3PH W/SCR Electric Heat Kit, 15 KW - 240V - 3PH W/SCR Electric Heat Kit, 15 KW - 240V - 3PH W/SCR Electric Heat Kit, 20 KW - 240V - 3PH W/SCR Electric Heat Kit, 20 KW - 240V - 3PH W/SCR Electric Heat Kit, 20 KW - 240V - 3PH W/SCR Electric Heat Kit, 30 KW - 240V - 3PH W/SCR Electric Heat Kit, 30 KW - 240V - 3PH W/SCR Electric Heat Kit, 5 KW - 480V - 3PH W/SCR Electric Heat Kit, 10 KW - 480V - 3PH W/SCR Electric Heat Kit, 15 KW - 480V - 3PH W/SCR Electric Heat Kit, 15 KW - 480V - 3PH W/SCR Electric Heat Kit, 20 KW - 480V - 3PH W/SCR Electric Heat Kit, 20 KW - 480V - 3PH W/SCR Electric Heat Kit, 20 KW - 480V - 3PH W/SCR Electric Heat Kit, 30 KW - 480V - 3PH W/SCR Electric Heat Kit, 30 KW - 480V - 3PH W/SCR Electric Heat Kit, 5 KW - 600V - 3PH W/SCR Electric Heat Kit, 10 KW - 600V - 3PH W/SCR Electric Heat Kit, 15 KW - 600V - 3PH W/SCR Electric Heat Kit, 15 KW - 600V - 3PH W/SCR Electric Heat Kit, 20 KW - 600V - 3PH W/SCR Electric Heat Kit, 20 KW - 600V - 3PH W/SCR Electric Heat Kit, 20 KW - 600V - 3PH W/SCR Electric Heat Kit, 30 KW - 600V - 3PH W/SCR Electric Heat Kit, 30 KW - 600V - 3PH W/SCR
Duct Smoke Detectors - Return Duct Smoke Detectors - Supply Duct Smoke Detectors - Supply and Return
60 Amp Disconnect 100 Amp Disconnect 150 Amp Disconnect
Convenience Outlets - Powered, 208/230 V Convenience Outlets - Powered, 460 V Convenience Outlets - Powered, 575 V Convenience Outlets - Non-Powered
Hinged Access Panels, 39" cabinet Hinged Access Panels, 43" cabinet Hinged Access Panels, 53" cabinet

DRC-DD 3-6 TON (HELC AC)

Fits Model Field Factory Operating Size Installed Installed Weight, lb

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton 3-6 ton 3-6 ton

3-6 ton 3-6 ton 3-6 ton 3-6 ton

3 ton

4-5 ton

6 ton

ACCESSORIES

DRC-DD 3-6 TON (HELC AC)

Daikin Master Item #

Vendor P/N Ref

Description

Economizers

0270L01163

ECH-DKNS1CA-W2DH

0270L01759

ECH-DKNS1CA-W2EH

0270L01598

ECH-DKNS2CA-W2DH

0270L01757

ECH-DKNS2CA-W2EH

0270L01600

ECH-DKNS3CA-W2DH

0270L01758

ECH-DKNS3CA-W2EH

0270L01749

N/A

0270L01751

N/A

0270L01118

N/A

0270L01120

N/A

0270L01753

ECD-DKN12SA-W2EH

0270L01755

ECD-DKN12CA-W2EH

0270L01156

ECD-DKN12SA-W2DH

0270L01158

ECD-DKN12CA-W2DH

Curbs and Restraint Clips

0221L00014

CRBK-DKN12SA-1411

0221L00015

CRBK-DKN12SA-2411

0270L01261

MH-DKN12SA-SRT

0270L01250

MH-DKN12SA-OEM

0221L00019

CRBK-DKN12FA-14

0221L00020

CRBW-DKN126A-14

Concentrics

0270L01602

1017-100A-DKN

0270L01603

1017-200A-DKN

0270L01335

0817-DKN12-16

0270L01338

0817-DKN12-18

Dampers

0270L01165

OA2-DKN12CA-W00S

0270L01166

OAM-DKN12-W000

Metal Frame Filter Kits

MFFKT002FI

N/A

MFFKT003FI

N/A

MFFKT004FI

N/A

Hail Guard Kits

HAILGD036HE

N/A

HAILGD036HEFI

N/A

HAILGD048060HE

N/A

HAILGD48060HEFI

N/A

HAILGD072HE

N/A

HAILGD072HEFI

N/A

Crankcase Heater Kits

HECH36230

N/A

HECH4860230

N/A

HECH36460

N/A

HECH4860460

N/A

HECH36575

N/A

HECH4860575

N/A

High Efficiency Filters

0160L00268

172-112-371

0160L00270

172-112-700

0160L00204

91013.021420

0160L00201

91013.022020

Misc Accessories

TTBCKHE01

N/A

TTBCKHE01FI

N/A

3PMKP1

N/A

3PMKP1FI

N/A

0270L01232

BBI-DKN12SA

0270L02209

N/A

0270L02208

N/A

DPOFSK01

N/A

Power Exhausts

0270L01167

PPD-DKN12CA-W000-1VB

0270L01170

PPH-DKN12CA-W000-1VB

0270L01171

PPH-DKN12CA-W000-4VB

0270L01168

PPD-DKN12CA-W000-4VB

Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 39" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 39" cabinet Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 43" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 43" cabinet Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 53" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 53" cabinet Vertical Economizer std Jade, FACTORY ENTHALPY SENSOR Vertical Economizer ULL Jade, FACTORY ENTHALPY SENSOR Vertical Economizer STD LEAK JADE CONTROL, factory dry bulb Vertical Economizer UL LEAK JADE CONTROL, factiry dry bulb Vertical Economizer std Jade, ENTHALPY SENSOR Vertical Economizer ULL Jade, ENTHALPY SENSOR Vertical Economizer STD LEAK JADE CONTROL, dry bulb Vertical Economizer UL LEAK JADE CONTROL, dry bulb
Roof Curb 14" Tall, Knocked Down Roof Curb 24" Tall, Knocked Down Hold Down Bracket Kit for Competitor's Roofcurb [Restraint Clips Carrier Curb (Curb Bracket Kit)] Hold Down Bracket Kit for Daikin Roofcurb [Restraint Clips Daikin Curbs (Curb Bracket Kit)] Roof Curb 14" Tall Seismic with Hold Down Brackets, Knocked Down Roof Curb 14" Tall Wind-Rated Hurricane with Hold Down Brackets, Welded
Concentric Diffuser 24 x 48 with 16" dia collars Concentric Diffuser 24 x 48 with 18" dia collars Concentric Duct Adaptor Kit for 16" Dia. Duct Concentric Duct Adaptor Kit for 18" Dia. Duct
2 Position Motorized Damper Manual Outdoor Air Damper
Metal Frame Filter Kit - 14x20x2 (qty 4) Metal Frame Filter Kit - 14x20x2 (qty 2) 20x20x2 (qty 2) Metal Frame Filter Kit - 20x20x2 (qty 4)
Condenser Coil Hail Guards, 39" cabinet Condenser Coil Hail Guards, 39" cabinet Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 53" cabinet Condenser Coil Hail Guards, 53" cabinet
Crankcase heater Kit 208/230 V Crankcase heater Kit 208/230 V Crankcase heater Kit 460 V Crankcase heater Kit 460 V Crankcase heater Kit 575 V Crankcase heater Kit 575 V
High Efficiency MERV 8 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 8 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton) High Efficiency MERV 13 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 13 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton)
Through the Base Gas/Electrical Through the Base Gas/Electrical Phase Monitor Kit Phase Monitor Kit Burglar bars Inserts Single Point Power Connection, 1 phase power exhaust Single Point Power Connection, 3 phase power exhaust Overflow Switch Kit
Power Exhaust Prop Vertical Economizer, 1 phase, 230 V Power Exhaust Prop Horizontal Economizer, 1 phase, 230 V Power Exhaust Prop Vertical Economizer, 3 phase, 460 V Power Exhaust Prop Horizontal Economizer, 3 phase, 460 V

Fits Model Field Factory Size Installed Installed

3 ton

4-5 ton

6 ton

3-6 ton

3-4 ton

5 ton

6 ton

3 ton

4-5 ton

6 ton

3 ton

4-6 ton

3 ton

4-6 ton

3 ton

4-6 ton

3-5 ton

5-6 ton

3-5 ton

5-6 ton

3-6 ton

Operating Weight, lb
88 88 88 88 88 88 65 65 65 65 65 65 65 65
80 109 8 8 102 140
32 35 28 28
40 24
1 1 1 1 1 1
4 4 4 4
1 1 2 2 18
57 47 57 47

ACCESSORIES

DRG-DD 3-6 TON (HELC GAS)

Daikin Master Item #

Vendor P/N Ref

Stainless Steel Heat Exchangers (Gas Only)

0257L00122

N/A

0257L00123

N/A

0257L00126

N/A

0257L00162

N/A

0257L00124

N/A

0257L00127

N/A

0257L00123

N/A

0257L00164

N/A

0257L00128

N/A

0257L00123

N/A

0257L00125

N/A

0257L00264

N/A

0257L00170

N/A

0257L00172

N/A

0257L00174

N/A

0257L00162

N/A

0257L00176

N/A

0257L00198

N/A

0257L00178

N/A

0257L00164

N/A

0257L00262

N/A

0257L00123

N/A

0257L00125

N/A

0257L00266

N/A

Duct Smoke Detectors

SDRKTP1FIS3

N/A

SDSKTP1FIS3

N/A

SDCKTP1FIS3

N/A

Non-Fused Disconnect Switches

DSC060A54YH01FI

N/A

DSC100A54YH01FI

N/A

DSC150A54YH01FI

N/A

Convenience Outlets

CONVOUTP36722

N/A

CONVOUTP36724

N/A

CONVOUTP36727

N/A

CONVTOUTNP036072 N/A

Hinged Access Panels

HGDRSMG01FI

N/A

HGDRSMG02FI

N/A

HGDRSMG03FI

N/A

Economizers

0270L01163

ECH-DKNS1CA-W2DH

0270L01759

ECH-DKNS1CA-W2EH

0270L01598

ECH-DKNS2CA-W2DH

0270L01757

ECH-DKNS2CA-W2EH

0270L01600

ECH-DKNS3CA-W2DH

0270L01758

ECH-DKNS3CA-W2EH

0270L01749

N/A

0270L01751

N/A

0270L01118

N/A

0270L01120

N/A

0270L01753

ECD-DKN12SA-W2EH

0270L01755

ECD-DKN12CA-W2EH

0270L01156

ECD-DKN12SA-W2DH

0270L01158

ECD-DKN12CA-W2DH

Curbs and Restraint Clips

0221L00014

CRBK-DKN12SA-1411

0221L00015

CRBK-DKN12SA-2411

0270L01261

MH-DKN12SA-SRT

0270L01250

MH-DKN12SA-OEM

0221L00019

CRBK-DKN12FA-14

0221L00020

CRBW-DKN126A-14

Description

Fits Model Field Factory Size Installed Installed

Operating Weight, lb

45,000 BTU, 2 burners 70,000 BTU, 3 burners 115,000 BTU, 6 burners 70,000 BTU, 3 burners 115,000 BTU, 5 burners 140,000 BTU, 6 burners 70,000 BTU, 3 burners 115,000 BTU, 5 burners 140,000 BTU, 6 burners 70,000 BTU, 3 burners 125,000 BTU, 5 burners 150,000 BTU, 6 burners 45,000 BTU, 2 burners, High Static 70,000 BTU, 3 burners, High Static 115,000 BTU, 6 burners, High Static 70,000 BTU, 3 burners, High Static 115,000 BTU, 5 burners, High Static 140,000 BTU, 6 burners, High Static 70,000 BTU, 3 burners, High Static 115,000 BTU, 5 burners, High Static 140,000 BTU, 6 burners, High Static 70,000 BTU, 3 burners, High Static 125,000 BTU, 5 burners, High Static 150,000 BTU, 6 burners, High Static

3 ton 3 ton 3 ton 4 ton 4 ton 4 ton 5 ton 5 ton 5 ton 6 ton 6 ton 6 ton 3 ton 3 ton 3 ton 4 ton 4 ton 4 ton 5 ton 5 ton 5 ton 6 ton 6 ton 6 ton

Duct Smoke Detectors - Return Duct Smoke Detectors - Supply Duct Smoke Detectors - Supply and Return

3-6 ton 3-6 ton 3-6 ton

60 Amp Disconnect 100 Amp Disconnect 150 Amp Disconnect

3-6 ton 3-6 ton 3-6 ton

Convenience Outlets - Powered, 208/230 V Convenience Outlets - Powered, 460 V Convenience Outlets - Powered, 575 V Convenience Outlets - Non-Powered

3-6 ton 3-6 ton 3-6 ton 3-6 ton

Hinged Access Panels, 39" cabinet Hinged Access Panels, 43" cabinet Hinged Access Panels, 53" cabinet

3 ton 4-5 ton 6 ton

3 ton

4-5 ton

6 ton

3-6 ton

Roof Curb 14" Tall, Knocked Down

3-6 ton

Roof Curb 24" Tall, Knocked Down

3-6 ton

Hold Down Bracket Kit for Competitor's Roofcurb [Restraint Clips Carrier Curb (Curb Bracket Kit)] 3-6 ton

Hold Down Bracket Kit for Daikin Roofcurb [Restraint Clips Daikin Curbs (Curb Bracket Kit)]

3-6 ton

Roof Curb 14" Tall Seismic with Hold Down Brackets, Knocked Down

3-6 ton

Roof Curb 14" Tall Wind-Rated Hurricane with Hold Down Brackets, Welded

3-6 ton

included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight included in operating weight

80 109 8 8 102 140

ACCESSORIES

Daikin Master Item #

Vendor P/N Ref

Description

Concentrics

0270L01602

1017-100A-DKN

0270L01603

1017-200A-DKN

0270L01335

0817-DKN12-16

0270L01338

0817-DKN12-18

Dampers

0270L01165

OA2-DKN12CA-W00S

0270L01166

OAM-DKN12-W000

Flue Extensions (Gas only)

HEFLUE036

N/A

HEFLUE048060

N/A

HEFLUE072

N/A

Hail Guard Kits

HAILGD036HE

N/A

HAILGD036HEFI

N/A

HAILGD048060HE

N/A

HAILGD48060HEFI

N/A

HAILGD072HE

N/A

HAILGD072HEFI

N/A

Crankcase Heater Kits

HECH36230

N/A

HECH4860230

N/A

HECH36460

N/A

HECH4860460

N/A

HECH36575

N/A

HECH4860575

N/A

Metal Frame Filter Kits

MFFKT002FI

N/A

MFFKT003FI

N/A

MFFKT004FI

N/A

High Efficiency Filters

0160L00268

172-112-371

0160L00270

172-112-700

0160L00204

91013.021420

0160L00201

91013.022020

Misc Accessories

LPHE-036072

N/A

HAKT036150

N/A

TTBCKHE01

N/A

TTBCKHE01FI

N/A

3PMKP1

N/A

3PMKP1FI

N/A

0270L01232

BBI-DKN12SA

0270L02209

N/A

0270L02208

N/A

DPOFSK01

N/A

Power Exhausts

0270L01167

PPD-DKN12CA-W000-1VB

0270L01170

PPH-DKN12CA-W000-1VB

0270L01171

PPH-DKN12CA-W000-4VB

0270L01168

PPD-DKN12CA-W000-4VB

Concentric Diffuser 24 x 48 with 16" dia collars Concentric Diffuser 24 x 48 with 18" dia collars Concentric Duct Adaptor Kit for 16" Dia. Duct Concentric Duct Adaptor Kit for 18" Dia. Duct
2 Position Motorized Damper Manual Outdoor Air Damper
Flue Extension, 39" cabinet Flue Extension, 43" cabinet Flue Extension, 53" cabinet
Condenser Coil Hail Guards, 39" cabinet Condenser Coil Hail Guards, 39" cabinet Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 53" cabinet Condenser Coil Hail Guards, 53" cabinet
Crankcase heater Kit 208/230 V Crankcase heater Kit 208/230 V Crankcase heater Kit 460 V Crankcase heater Kit 460 V Crankcase heater Kit 575 V Crankcase heater Kit 575 V
Metal Frame Filter Kit - 14x20x2 (qty 4) Metal Frame Filter Kit - 14x20x2 (qty 2) 20x20x2 (qty 2) Metal Frame Filter Kit - 20x20x2 (qty 4)
High Efficiency MERV 8 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 8 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton) High Efficiency MERV 13 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 13 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton)
Propane Conversion Kit (Gas only) High Altitude Kit (Gas only) Through the Base Gas/Electrical Through the Base Gas/Electrical Phase Monitor Kit Phase Monitor Kit Burglar bars Inserts Single Point Power Connection, 1 phase power exhaust Single Point Power Connection, 3 phase power exhaust Overflow Switch Kit
Power Exhaust Prop Vertical Economizer, 1 phase, 230 V Power Exhaust Prop Horizontal Economizer, 1 phase, 230 V Power Exhaust Prop Vertical Economizer, 3 phase, 460 V Power Exhaust Prop Horizontal Economizer, 3 phase, 460 V

DRG-DD 3-6 TON (HELC GAS)

Fits Model Field Factory Size Installed Installed

Operating Weight, lb

3-6 ton

3 ton

4-5 ton

6 ton

3 ton

4-5 ton

6 ton

3 ton

4-6 ton

3 ton

4-6 ton

3 ton

4-6 ton

3-4 ton

5 ton

6 ton

3-5 ton

5-6 ton

3-5 ton

5-6 ton

3-6 ton

ACCESSORIES

Daikin Master Item #

Vendor P/N Ref

DRH-DD 3-6 TON (HELC HP)

Fits Model Field Factory Operating Size Installed Installed Weight, lb

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

ACCESSORIES

Daikin Master Item #

Vendor P/N Ref

EHXD-3S16

6000-151-216

EHXD-3S20

6000-147-320

EHXD-3S21

6000-151-320

EHXD-3S22

6000-151-322

EHXD-3S30

6000-147-330

EHXD-3S31

6000-151-331

EHXD-4S05

6000-147-405

EHXD-4S10

6000-147-410

EHXD-4S15

6000-147-415

EHXD-4S16

6000-151-416

EHXD-4S20

6000-147-420

EHXD-4S21

6000-151-420

EHXD-4S22

6000-151-422

EHXD-4S30

6000-147-430

EHXD-4S31

6000-151-431

EHXD-7S05

6000-147-605

EHXD-7S10

6000-147-610

EHXD-7S15

6000-147-615

EHXD-7S16

6000-151-616

EHXD-7S20

6000-147-620

EHXD-7S21

6000-151-620

EHXD-7S22

6000-151-622

EHXD-7S30

6000-147-630

EHXD-7S31

6000-151-631

EHSD-1S05

6000-148-205

EHSD-1S10

6000-148-210

EHSD-1S15

6000-148-215

EHSD-1S16

6000-152-216

EHSD-1S22

6000-148-222

EHSD-3S05

6000-148-305

EHSD-3S10

6000-148-310

EHSD-3S15

6000-148-315

EHSD-3S16

6000-152-316

EHSD-3S20

6000-148-320

EHSD-3S21

6000-152-320

EHSD-3S22

6000-152-322

EHSD-3S30

6000-148-330

EHSD-3S31

6000-152-331

EHSD-4S05

6000-148-405

EHSD-4S10

6000-148-410

EHSD-4S15

6000-148-415

EHSD-4S16

6000-152-416

EHSD-4S20

6000-148-420

EHSD-4S21

6000-152-420

EHSD-4S22

6000-152-422

EHSD-4S30

6000-148-430

EHSD-4S31

6000-152-431

EHSD-7S05

6000-148-605

EHSD-7S10

6000-148-610

EHSD-7S15

6000-148-615

EHSD-7S16

6000-152-616

EHSD-7S20

6000-148-620

EHSD-7S21

6000-152-620

EHSD-7S22

6000-152-622

EHSD-7S30

6000-148-630

EHSD-7S31

6000-152-631

Duct Smoke Detectors

SDRKTP1FIS3

N/A

SDSKTP1FIS3

N/A

SDCKTP1FIS3

N/A

Non-Fused Disconnect Switches

DSC060A54YH01FI

N/A

DSC100A54YH01FI

N/A

DSC150A54YH01FI

N/A

Convenience Outlets

CONVOUTP36722

N/A

CONVOUTP36724

N/A

CONVOUTP36727

N/A

CONVTOUTNP036072 N/A

Hinged Access Panels

HGDRSM02FI

N/A

HGDRSM03FI

N/A

DRH-DD 3-6 TON (HELC HP)

Fits Model Field Factory Size Installed Installed

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-5 ton

4-5 ton

3 ton

4-5 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

3-6 ton

3 ton

5-6 ton

4&6 ton

4-5 ton

6 ton

Operating Weight, lb

3-6 ton 3-6 ton 3-6 ton

3-6 ton 3-6 ton 3-6 ton 3-6 ton

3-5 ton

6 ton

ACCESSORIES

DRH-DD 3-6 TON (HELC HP)

Daikin Master Item #

Vendor P/N Ref

Description

Economizers

0270L01163

ECH-DKNS1CA-W2DH

0270L01759

ECH-DKNS1CA-W2EH

0270L01598

ECH-DKNS2CA-W2DH

0270L01757

ECH-DKNS2CA-W2EH

0270L01600

ECH-DKNS3CA-W2DH

0270L01758

ECH-DKNS3CA-W2EH

0270L01749

N/A

0270L01751

N/A

0270L01118

N/A

0270L01120

N/A

0270L01753

ECD-DKN12SA-W2EH

0270L01755

ECD-DKN12CA-W2EH

0270L01156

ECD-DKN12SA-W2DH

0270L01158

ECD-DKN12CA-W2DH

Curbs and Restraint Clips

0221L00014

CRBK-DKN12SA-1411

0221L00015

CRBK-DKN12SA-2411

0270L01261

MH-DKN12SA-SRT

0270L01250

MH-DKN12SA-OEM

0221L00019

CRBK-DKN12FA-14

0221L00020

CRBW-DKN126A-14

Concentrics

0270L01602

1017-100A-DKN

0270L01603

1017-200A-DKN

0270L01335

0817-DKN12-16

0270L01338

0817-DKN12-18

Dampers

0270L01165

OA2-DKN12CA-W00S

0270L01166

OAM-DKN12-W000

Metal Frame Filter Kits

MFFKT002FI

N/A

MFFKT003FI

N/A

MFFKT004FI

N/A

Hail Guard Kits

HAILGD048060HE

N/A

HAILGD48060HEFI

N/A

HAILGD072HE

N/A

HAILGD072HEFI

N/A

High Efficiency Filters

0160L00268

172-112-371

0160L00270

172-112-700

0160L00204

91013.021420

0160L00201

91013.022020

Misc Accessories

TTBCKHE01

N/A

TTBCKHE01FI

N/A

3PMKP1

N/A

3PMKP1FI

N/A

0270L01232

BBI-DKN12SA

0270L02209

N/A

0270L02208

N/A

DPOFSK01

N/A

Power Exhausts

0270L01167

PPD-DKN12CA-W000-1VB

0270L01170

PPH-DKN12CA-W000-1VB

0270L01171

PPH-DKN12CA-W000-4VB

0270L01168

PPD-DKN12CA-W000-4VB

Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 39" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 39" cabinet Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 43" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 43" cabinet Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 53" cabinet Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 53" cabinet Vertical Economizer std Jade, FACTORY ENTHALPY SENSOR Vertical Economizer ULL Jade, FACTORY ENTHALPY SENSOR Vertical Economizer STD LEAK JADE CONTROL, factory dry bulb Vertical Economizer UL LEAK JADE CONTROL, factiry dry bulb Vertical Economizer std Jade, ENTHALPY SENSOR Vertical Economizer ULL Jade, ENTHALPY SENSOR Vertical Economizer STD LEAK JADE CONTROL, dry bulb Vertical Economizer UL LEAK JADE CONTROL, dry bulb
Roof Curb 14" Tall, Knocked Down Roof Curb 24" Tall, Knocked Down Hold Down Bracket Kit for Competitor's Roofcurb [Restraint Clips Carrier Curb (Curb Bracket Kit)] Hold Down Bracket Kit for Daikin Roofcurb [Restraint Clips Daikin Curbs (Curb Bracket Kit)] Roof Curb 14" Tall Seismic with Hold Down Brackets, Knocked Down Roof Curb 14" Tall Wind-Rated Hurricane with Hold Down Brackets, Welded
Concentric Diffuser 24 x 48 with 16" dia collars Concentric Diffuser 24 x 48 with 18" dia collars Concentric Duct Adaptor Kit for 16" Dia. Duct Concentric Duct Adaptor Kit for 18" Dia. Duct
2 Position Motorized Damper Manual Outdoor Air Damper
Metal Frame Filter Kit - 14x20x2 (qty 4) Metal Frame Filter Kit - 14x20x2 (qty 2) 20x20x2 (qty 2) Metal Frame Filter Kit - 20x20x2 (qty 4)
Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 43" cabinet Condenser Coil Hail Guards, 53" cabinet Condenser Coil Hail Guards, 53" cabinet
High Efficiency MERV 8 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 8 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton) High Efficiency MERV 13 Air Filter Kit - 14x20x2 (qty 4 on 3-4 ton, qty 2 on 5 ton) High Efficiency MERV 13 Air Filter Kit - 20x20x2 (qty 2 on 5 ton, qty 4 on 6 ton)
Through the Base Gas/Electrical Through the Base Gas/Electrical Phase Monitor Kit Phase Monitor Kit Burglar bars Inserts Single Point Power Connection, 1 phase power exhaust Single Point Power Connection, 3 phase power exhaust Overflow Switch Kit
Power Exhaust Prop Vertical Economizer, 1 phase, 230 V Power Exhaust Prop Horizontal Economizer, 1 phase, 230 V Power Exhaust Prop Vertical Economizer, 3 phase, 460 V Power Exhaust Prop Horizontal Economizer, 3 phase, 460 V

Fits Model Field Factory Size Installed Installed

3 ton

4-5 ton

6 ton

3-6 ton

3-4 ton

5 ton

6 ton

3-5 ton

6 ton

3-5 ton

5-6 ton

3-5 ton

5-6 ton

3-6 ton

Operating Weight, lb
88 88 88 88 88 88 65 65 65 65 65 65 65 65
80 109 8 8 102 140
32 35 28 28
40 24
4 4 4 4
1 1 2 2 18
57 47 57 47

ACCESSORIES
B A

ROOF CURBS 14CURB3672
C

*EXPLODED VIEW OF 0221L00019

*MODEL OF 0221L00020

Part Number

Description

Models A

0221L00014

Small Roof Curb

3 - 5 Ton 70 3/4" 42 5/8" 14"

0221L00015

Small Roof Curb

3 - 5 Ton 70 3/4" 42 5/8" 24"

0221L00019 14" Seismic Curb with Clips 3 - 5 Ton 70 5/8" 42 1/2" 14"

0221L00020 14" Wind-Rated Curb with Clips 3 - 5 Ton 70 5/8" 42 1/2" 14"

Measurement in inches.

DOWNFLOW SQUARE TO ROUND ADAPTERS DDNSQRD3616, DDNSQRD487218

DNSQRD36B Shown
A

B D

Measurement in inches.

DOWNFLOW SQUARE TO ROUND ADAPTER

MODEL DDNSQRD3616
DDNSQRD487218

SIZE 16" ROUND
18" ROUND

A 13.50
13.50

B 31.125
31.125

C 19.50
19.50

D 13.50
19.00

ACCESSORIES

Part Number 0270L01165 0270L01166
*0270L01163

MOTORIZED/MANUAL FRESH AIR DAMPERS

Air Dampers Description
2 Position Motorized Damper Manual Outdoor Air Damper

Models 3 - 5 Ton 3 - 5 Ton

*0270L01166

FILTER DOOR

ECONOMIZERS

Horizontal Economizers

Part Number

Description

0270L01163 Horizontal Economizer UL LEAK JADE CONTROL DRY BULB, 39" cabinet

0270L01759 Horizontal Economizer UL LEAK JADE ENTHALPY SENSOR, 39" cabinet

DRYB-BULB/ENTHALPY SENSOR IF APPLICABLE
CONTROLLER ACTUATOR IF APPLICABLE

FILTER PANEL

Models 3 - 5 Ton 3 - 5 Ton
MIXED AIR SENSOR SHIPS LOOSE IF APPLICABLE. MOUNTS INSIDE DAIKIN UNIT.

HOOD SHIPPED FULLY ASSEMBLED WITH METAL MESH FILTER

ACCESSORIES

CONTROLLER IF APPLICABLE

ECONOMIZERS

Downflow Economizers

Part Number

Description

0270L01163 Horizontal Economizer Ultra Low-Leak JADE Dry-Bulb, 39" cabinet

0270L01759 Horizontal Economizer Ultra Low-Leak JADE Enthalpy Sensor, 39" cabinet

0270L01753 Vertical Economizer Standard Low-Leak JADE Ethalpy Sensor

0270L01755 Vertical Economizer Ultra Low-Leak JADE Ethalpy Sensor

0270L01156 Vertical Economizer Standard Low-Leak JADE Dry-Bulb

0270L01158 Vertical Economizer Ultra Low-Leak JADE Dry-Bulb

DRYB-BULB/ENTHALPY SENSOR IF APPLICABLE

MIXED AIR SENSOR SHIPS LOOSE IF APPLICABLE. MOUNTS INSIDE DAIKIN UNIT.

Models 3-5 ton 3-5 ton 3-6 ton 3-6 ton 3-6 ton 3-6 ton

*0270L01158 *This is a Field Installed Kit

METAL MESH FILTER
PACKAGE HOOD INSIDE THE RETURN COMPARTMENT
*0270L01749 *0270L01751 *0270L01118 *0270L01120 *These are Factory Installed

*0270L01156 *0270L01753 *These are Field Installed Kits
16

Updated economizer parts list with rooftop systems part number

ACCESSORIES

Part Number 0270L01167 0270L01170 0270L01168 0270L01171

Power Exhaust Description
POWER EXHAUST PROP VERTICL ECNMZR, 1 PHASE, 230 V POWER EXHAUST PROP HORIZNTL ECNMZR, 1 PHASE, 230 V POWER EXHAUST PROP VERTICL ECNMZR, 1 PHASE, 460 V POWER EXHAUST PROP HORIZNTL ECNMZR, 1 PHASE, 460 V

Models 3 - 5 Ton 3 - 5 Ton 3 - 5 Ton 3 - 5 Ton

*0270L01167 *0270L01168 *Vertical Orientation

*0270L01170 *0270L01171 *Horizontal Orientation

FILTER DOOR

GASKET APPLIED TO MATING

GASKET APPLIED TO MATING FLANGES

ACCESSORIES

HAIL GUARD KIT

Part Number HAILGD036HE HAILGD036HEFI

Hail Guard Kit Description Condenser Coil Hail Guards, 39" cabinet Condenser Coil Hail Guards, 39" cabinet, Factory Installed

*HAILGD036HE is Field Installed Kit

Models 3 - 5 Ton 3 - 5 Ton

*HAILGD036HEFI is Factory Installed
18

ACCESSORIES

FLUE EXTENSION KIT

Flue Extension Kit Part Number Description HEFLUE036 Flue Extension, 39" cabinet (Gas only)

Models 3 - 5 Ton (Gas Only)

A 27 1/2"

SYSTEM OPERATION
20

SYSTEM OPERATION
Typical Package Cooling or Package Gas

DRC/DRG*****XXXXXXXXXXXXXX

Either a thermostatic expansion valve or restrictor orifice assembly may be used depending on model. Refer to the parts catalog for the model being serviced.
Restrictor Orifice Assembly in Cooling Operation
In the cooling mode the orifice is pushed into its seat forcing refrigerant to flow through the metered hole in the center of the orifice.
21

SYSTEM OPERATION
Typical Heat Pump System in Cooling
Indoor Coil Accumulator

DRH*****XXXXXXXXXXXXXX

Reversing Valve (Energized)

Outdoor Coil

Typical Heat Pump System in Heating
Indoor Coil Accumulator

Reversing Valve (De-Energized)

Outdoor Coil

SYSTEM OPERATION

DRG*****XXXXXXXXXXXXXX

Direct Spark Ignition (DSI) Systems DRG units are equipped with a direct spark ignition system. Ignition is provided by 22,000 volt electronic spark. A flame sensor then monitors for the presence of flame and closes the gas valve if flame is lost.
The system may be controlled by most good heating and cooling thermostats with an adjustable heat anticipator.

WARNING
HIGH VOLTAGE Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

NOTE: Some night setback thermostats that do not have a common terminal use a power robbing circuit in the off cycle to maintain the batteries. This type of thermostat may interfere with the operation of the ignition control module and should not be used.

SYSTEM OPERATION

Pre-Installation Checks Carefully read all instructions for the installation prior to installing unit. Ensure each step or procedure is understood and any special considerations are taken into account before starting installation. Assemble all tools, hardware and supplies needed to complete the installation. Some items may need to be purchased locally.
WARNING
To prevent possible equipment damage, property damage, personal injury or death, the following bullet points must be observed when installing the unit.
IMPORTANT NOTE: Remove wood shipping rails prior to installation of the unit.
All Installations: Important Note: Unit should be energized 24 hours prior to compressor start up to ensure crankcase heater has sufficiently warmed the compressors. Compressor damage may occur if this step is not followed.
NOTE: Appliance is shipped from factory for vertical duct application.
Proper installation of the unit ensures trouble-free operation. Improper installation can result in problems ranging from noisy operation to property or equipment damages, dangerous conditions that could result in injury or personal property damage and that are not covered by the warranty. Give this booklet to the user and explain it's provisions. The user should retain these instructions for future reference.
· For proper flame pattern within the heat exchanger and proper condensate drainage, the unit must be mounted level.
· The flue outlet must be at least 12 inches from any opening through which flue gases could enter a building, and at least three feet above any forced air inlet located within ten feet. The economizer/ manual fresh air intake/motorized fresh air intake and combustion air inlet mounted on the unit are not affected by this restriction.

· To avoid possible corrosion of the heat exchanger, do not locate the unit in an area where the outdoor air (i.e. combustion air for the unit) will be frequently contaminated by compounds containing chlorine or fluorine. Common sources of such compounds include swimming pool chemicals and chlorine bleaches, paint stripper, adhesives, paints, varnishes, sealers, waxes (which are not yet dried) and solvents used during construction and remodeling. Various commercial and industrial processes may also be sources of chlorine/ fluorine compounds.
· The unit shall not be connected to a chimney flue serving a separate appliance designed to burn solid fuel.
· To avoid possible illness or death of the building occupants, do NOT locate outside air intake device (economizer, manual fresh air intake, motorized fresh air intake) too close to an exhaust outlet, gas vent termination, or plumbing vent outlet. For specific distances required, consult local codes.
· Allow minimum clearances from the enclosure for fire protection, proper operation, and service access (see unit clearances). These clearances must be permanently maintained.
· The combustion air inlet and flue outlet on the unit must never be obstructed. If used, do not allow the economizer/manual fresh air damper/ motorized fresh air damper to become blocked by snow or debris. In some climates or locations, it may be necessary to elevate the unit to avoid these problems.
· When the unit is heating, the temperature of the return air entering the unit must be a minimum of 55° F.
Ground Level Installations Only: · When the unit is installed on the ground adjacent
to the building, a level concrete (or equal) base is recommended. Prepare a base that is 3" larger than the package unit footprint and a minimum of 3" thick. · The base should also be located where no runoff of water from higher ground can collect in the unit.
Roof top Installations Only: · To avoid possible property damage or personal injury,
the roof must have sufficient structural strength to carry the weight of the unit(s) and snow or water loads as required by local codes. Consult a structural engineer to determine the weight capabilities of the roof. · The unit may be installed directly on wood floors or on Class A, Class B, or Class C roof covering material. · To avoid possible personal injury, a safe, flat surface for service personnel should be provided.

SYSTEM OPERATION

· As indicated on the unit data plate, a minimum clearance of 36" to any combustible material is required on the furnace access side of the unit. All combustible materials must be kept out of this area.
· This 36" clearance must also be maintained to insure proper combustion air and flue gas flow. The combustion air intake and furnace flue discharge must not be blocked for any reason, including blockage by snow.
· Adequate clearances from the furnace flue discharge to any adjacent public walkways, adjacent buildings, building openings or openable windows must be maintained in accordance with the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54.
· Minimum horizontal clearance of 48" from the furnace flue discharge to any electric meters, gas meters, regulators and relief equipment is required.
Unit Precautions · Do not stand or walk on the unit. · Do not drill holes anywhere in panels or in the base
frame of the unit except where indicated. Unit access panels provide structural support. · Do not remove any access panels until unit has been installed on roof curb or field supplied structure. · Do not roll unit across finished roof without prior approval of owner or architect. · Do not skid or slide on any surface as this may damage unit base. The unit must be stored on a flat, level surface. Protect the condenser coil because it is easily damaged.
Roof Curb Installations Only: Curb installations must comply with local codes and should be done in accordance with the established guidelines of the National Roofing Contractors Association.

WARNING
To prevent possible equipment damage, property damage, personal injury or death, the following bullet points must be observed when installing the unit.
· Sufficient structural support must be determined prior to locating and mounting the curb and package unit.
· Ductwork must be constructed using industry guidelines. The duct work must be placed into the roof curb before mounting the package unit. Our full perimeter curbs include duct connection frames to be assembled with the curb. Cantilevered type curbs are not available from the factory.
· Curb insulation, cant strips, flashing and general roofing material are furnished by the contractor.
· The curbs must be supported on parallel sides by roof members.
· The roof members must not penetrate supply and return duct opening areas as damage to the unit might occur.
NOTE: The unit and curb accessories are designed to allow vertical duct installation before unit placement. Duct installation after unit placement is not recommended.
CAUTION
ALL CURBS LOOK SIMILAR. TO AVOID INCORRECT CURB POSITIONING,
CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS ON CURB
ASSEMBLY. INSTRUCTIONS MAY VARY IN CURB STYLES AND SUPERSEDES INFORMATION SHOWN.
See the manual shipped with the roof curb for assembly and installation instructions.

Proper unit installation requires that the roof curb be firmly and permanently attached to the roof structure. Check for adequate fastening method prior to setting the unit on the curb.

Full perimeter roof curbs are available from the factory and are shipped unassembled. Field assembly, squaring, leveling and mounting on the roof structure are the responsibility of the installing contractor. All required hardware necessary for the assembly of the sheet metal curb is included in the curb accessory.

SYSTEM OPERATION
CLEARANCES

24" MIN.

36" MIN.

24" MIN.

Unit Clearances

Roof Curb Installation

*In situations that have multiple units, a 36" minimum clearance is required between the condenser coils.

Adequate clearance around the unit should be kept for safety, service, maintenance, and proper unit operation. A clearance of 48" is recommended on all sides of the unit to facilitate possible parts replacement, to allow service access and to insure proper ventilation and condenser airflow. The top of the unit should be completely unobstructed. If units are to be located under an overhang, there should be a minimum of 48" clearance and provisions made to deflect the warm discharge air out from the overhang. The unit should be installed remote from all building exhausts to inhibit ingestion of exhaust air into the unit fresh air intake.

NOTE: If the 36" minimum clearance is used on the control panel side of a DRG unit, a flue extension kit needs be to installed to prevent flue gas recirculation. See table below for the kit selection.

Model size 3 ton
4 & 5 ton 6 ton

Kit part number HEFLUE036
HEFLUE048060 HEFLUE072

ROOF CURB POST-INSTALLATION CHECKS After installation, check the top of the curb, duct connection frame and duct flanges to make sure gasket has been applied properly. Gasket should be firmly applied to the top of the curb perimeter, duct flanges and any exposed duct connection frame. If gasket is loose, re-apply using strong weather resistant adhesive.
Protrusion Inspect curb to ensure that none of the utility services (electric) routed through the curb protrude above the curb.
CAUTION
If protrusions exist, do not attempt to set unit on curb.
ROOF TOP DUCT CONNECTIONS Install all duct connections on the unit before placing the unit on rooftop.
Horizontal Discharge Refer to IOD-7082 included in the literature pack for installing horizontal duct covers.

Flue Extension Kits

Flexible duct connectors between the unit and ducts are recommended. Insulate and weatherproof all external ductwork and joints as required and in accordance with local codes.

SYSTEM OPERATION

SUPPLY 12" X 17"

7-3/8

RETURN 11" X 25"

6-3/16
Horizontal Discharge Duct Connections
RIGGING DETAILS

· Two spreader bars must span over the unit to prevent damage to the cabinet by the lift cables. Spreader bars must be of sufficient length so that cables do not come in contact with the unit during transport. Remove wood struts mounted beneath unit base frame before setting unit on roof curb. These struts are intended to protect unit base frame from fork lift damage. Removal is accomplished by extracting the sheet metal retainers and pulling the struts through the base of the unit. Refer to rigging label on the unit.
Important: If using bottom discharge with roof curb, ductwork should be attached to the curb prior to installing the unit. Ductwork dimensions are shown in Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper curb installation. Curbing must be installed in compliance with the National Roofing Contractors Association Manual.

WARNING
To prevent property damage, the unit should remain in an upright position during all rigging and moving operations. To facilitate lifting and moving when a crane is used, place the unit in an adequate cable sling.

CAUTION
If units are lifted two at a time, the fork holes on the condenser end of the unit must not be used. Minimum fork length is 42" to prevent damage to the unit; however, 48" is recommended.
Provisions for forks have been included in the unit base frame. No other fork locations are approved.

To assist in determining rigging requirements, unit weights and center of gravity are shown as follows:

WARNING
To prevent possible equipment damage, property damage, personal injury or death, the following bullet points must be observed when installing the unit.
· Unit must be lifted by the four lifting holes located at the base frame corners.
· Lifting cables should be attached to the unit with shackles.
· The distance between the crane hook and the top of the unit must not be less than 60". 27

SYSTEM OPERATION

WEIGHTS AND CENTER OF GRAVITY

ELECTRICAL WIRING

A
CONDENSER COIL Y

RETURN EVAPORATOR COIL CG
SUPPLY

C
WARNING
HIGH VOLTAGE! Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

WARNING

COMPRESSOR

HIGH VOLTAGE! To avoid personal injury or death due

to electrical shock, do not tamper with factory wiring. The internal power and

Corner and center of gravity locations

control wiring of these units are factory-

installed and have been thoroughly tested

prior to shipment. Contact your local

Note: Unit should be lifted at a point above center of

representative if assistance is required.

gravity.

Model

Shipping Operating Weight (lb) Weight (lb)

DRG036 630

572

DRG048 705

647

DRG060 713

655

DRG072 763

705

Corner Weights (lb)

104 141 186 141

118 231 180 118

148 189 135 183

122 246 180 157

X (in) Y (in)
36.5 27.7 36.3 27.9 35.8 27.5 35.3 27.7

CAUTION
To prevent damage to the wiring, protect wiring from sharp edges. follow national electrical code and all local codes and ordinances. Do not route wires through removable access panels.

The numbers may slightly vary depending on installed options.
CAUTION
To prevent severe damage to the bottom of the unit, do not fork lift unit after wood struts have been removed.
Bring condenser end of unit into alignment with the curb first. Lower unit carefully onto roof mounting curb. When a rectangular cantilever curb is used, care should be taken to center the unit. Check for proper alignment and orientation of supply and return openings with duct.
Rigging Removal CAUTION
To prevent damage to the unit, do not allow crane hooks and spreader bars to rest on the roof of the unit.

CAUTION
Conduit and fittings must be weather-tight to prevent water entry into the building.
For unit protection, use a fuse or HACR circuit breaker that is in excess of the circuit ampacity, but less than or equal to the maximum overcurrent protection device. DO NOT EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weatherproof fittings. All exterior power supply and ground wiring must be in approved weatherproof conduit.
The main power supply wiring to the unit and low voltage wiring to accessory controls must be done in accordance with these instructions, the latest edition of the National Electrical Code (ANSI/NFPA 70), and all local codes and ordinances.

Remove spreader bars, lifting cables and other rigging equipment.

The unit is factory wired for the voltage shown on the unit's data plate.

SYSTEM OPERATION
NOTE: If supply voltage is 208V, lead on primary of transformer(s) must be moved from the 230V to the 208V tap. Refer to wiring diagram on unit for details.
Main power wiring should be sized for the minimum circuit ampacity shown on the unit's dataplate. Size wires in accordance with the ampacity tables in Article 310 of the National Electrical Code. If long wires are required, it may be necessary to increase the wire size to prevent excessive voltage drop. Wires should be sized for a maximum of 3% voltage drop.

CAUTION
To avoid risk of property damage, personal injury or fire, use only copper conductors.

Gas Control box
note: depending on the options installed, the location of the components may vary in some models

CAUTION
To prevent improper and dangerous operation due to wiring errors, label all wires prior to disconnection when servicing controls. Verify proper operation after servicing.

WARNING
Operating the unit with an improper line voltage or with excessive phase unbalance can cause damage to or failure of the unit. Such damage or failure is not covered under the unit's warranty.

NOTE: A weather-tight disconnect switch, properly sized for the unit total load, must be field or factory installed. An external field supplied disconnect may be mounted on the exterior panel.
Ensure the data plate is not covered by the field-supplied disconnect switch. · Some disconnect switches are not fused. Protect the
power leads at the point of distribution in accordance with the unit data plate. · The unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code ANSI/ NFPA 70, and/or the Canadian Electrical Code, CSA C22.1, Part 1. A ground lug is provided for this purpose. Do not use the ground lug for connecting a neutral conductor. · Connect power wiring to the electrical power block located within the main control box.

Areas Without Convenience Outlet It is recommended that an independent 115V power source be brought to the vicinity of the roof top unit for portable lights and tools used by the service mechanic.
NOTE: Refer to local codes for requirements. These outlets can also be factory installed.
Units installed on Roof Tops Main power and low voltage wiring may enter the unit through the condenser end of unit or through the roof curb. Install conduit connectors at the desired entrance locations. External connectors must be weatherproof. All holes in the unit base must be sealed (including those around conduit nuts) to prevent water leakage into building. All required conduit and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by more than 10% of the value indicated on the unit data plate. Phase voltage unbalance must not exceed 2%. Contact your local power company for correction of improper voltage or phase unbalance.

SYSTEM OPERATION

HIGH VOLTAGE ENTRANCE (REMOVE PLUG)

19-3/8 31-3/8

LOW VOLTAGE ENTRANCE

NOTE: Field-supplied conduit may need to be installed depending on unit/curb configuration. Use #18 AWG solid conductor wire whenever connecting thermostat wires to terminals on sub-base. DO NOT use larger than #18 AWG wire. A transition to #18 AWG wire may be required before entering thermostat sub-base.
NOTE: Refer to unit wiring diagrams for thermostat or remote sensor connections.
GAS SUPPLY PIPING

RETURN

WARNING

POWER THRU THE CURB

4-1/16 DIA.
4-1/2" 7-1/2"

47-9/16"
electrical entrance and thru curb (bottom view of unit)

Low Voltage Control Wiring 1. A 24V thermostat must be installed for unit operation. 2. Locate thermostat or remote sensor in the
conditioned space where it will sense average temperature. Do not locate the device where it may be directly exposed to supply air, sunlight or other sources of heat. Follow installation instructions packaged with the installed device. 3. Use #18 AWG wire for 24V control wiring runs not exceeding 75 feet. Use #16 AWG wire for 24V control wiring runs not exceeding 125 feet. Use #14 AWG wire for 24V control wiring runs not exceeding 200 feet. Low voltage wiring may be National Electrical Code (NEC) Class 2 where permitted by local codes. 4. Route the low voltage control wires from sub-base terminals to the unit. Control wiring should enter through the condenser panel opening or through curb indicated in "Electrical Entrance" figure. Connect thermostat and any accessory wiring to low voltage terminal block TB1 in the main control box. 5. For two-stage heating operation, remove the factory installed jumper connecting W1 and W2 terminals on terminal block.

To prevent personal injury or death due to improper installation, adjustment, alteration, service or maintenance, refer to this manual. For additional assistance or information, consult a qualified installer, servicer agency or the gas supplier.
IMPORTANT NOTE: This unit is factory set to operate on natural gas at the altitudes shown on the rating plate.

WARNING
To avoid property damage, personal injury or death when either using propane gas alone or at higher altitudes, obtain and install the proper conversion kit(s). Failure to do so can result in unsatisfactory operation and/or equipment damage. High altitude kits are for U.S. installations only and are not approved for use in Canada.

The rating plate is stamped with the model number, type of gas and gas input rating. Make sure the unit is equipped to operate on the type of gas available. Conversion to propane (LP) gas is permitted with the use of the factory authorized conversion kit (see the unit Technical Manual for the appropriate kit). For High Altitude derates, refer to the latest edition of the National Fuel Gas Code NFPA 54/ ANSI Z223.1 or National Standard of Canada, Natural Gas and Propane Installation Code, CSA B149.1.

NATURAL PROPANE

INLET GAS PRESSURE Min. 5.0" W.C., Max. 10.0" W.C. Min. 11.0" W.C., Max. 14.0" W.C.

inlet gas pressure must not exceed maximum value shown in table above.

SYSTEM OPERATION

The minimum supply pressure should not vary from that shown in the table above because this could prevent the unit from having dependable ignition. In addition, gas input to the burners must not exceed the rated input shown on the rating plate. Overfiring of the unit could result in premature heat exchanger failure.

Piping IMPORTANT NOTE: To avoid possible unsatisfactory operation or equipment damage due to under firing of equipment, do not undersize the natural/propane gas piping from the meter/tank to the unit. When sizing a trunk line, include all appliances on that line that could be operated simultaneously.

The gas line installation must comply with local codes, or in the absence of local codes, with the latest edition of the National Fuel Gas Code NFPA 54 / ANSI Z223.1.

Natural Gas Connection

Natural Gas Capacity of Pipe

in Cubic Feet of Gas Per Hour (CFH)

Length of

Nominal Black Pipe Size (inches)

Pipe in Feet 1/2

3/4

1 1/4 1 1 /2

132 278 520 1050 1600

190 350 730 1100

152 285 590 980

130 245 500 760

115 215 440 670

105 195 400 610

180 370 560

170 350 530

160 320 490

100

150 305 460

Pressure= .50 PSIG or less and Pressure Drop of 0.3" W.C.

(Based on 0.60 Specific Gravity Gas)

CFH =

BTUH Furnace Input Heating Value of Gas (BTU/Cubic Foot

Refer to the Proper Piping Practice drawing for the general layout at the unit. The following rules apply: 1. Use black iron pipe and fittings for the supply piping.
The use of a flex connector and/or copper piping is permitted as long as it is in agreement with local codes. 2. Use pipe joint compound on male threads only. Pipe joint compound must be resistant to the action of the fuel used. 3. Use ground joint unions. 4. Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches long.

5. Use two pipe wrenches when making connection to the gas valve to keep it from turning.
6. Install a manual shut-off valve in a convenient location (within six feet of unit) between the meter and the unit.
7. Tighten all joints securely. 8. The unit must be connected to the building piping by
one of the following methods: · Rigid metallic pipe and fittings · Semirigid metallic tubing and metallic fittings
(Aluminum alloy tubing must not be used in exterior locations). · Listed gas appliance connectors used in accordance with the terms of their listing that are completely in the same room as the equipment. Always use a new listed connector. · In the prior two methods above the connector or tubing must be protected from physical and thermal damage. Aluminum alloy tubing and connectors must be coated to protect against external corrosion when in contact with masonry, plaster or insulation or are subject to repeated wettings by liquids (water - not rain water, detergents or sewage).

BURNER DOOR

MANUAL

SHUT-OFF

GROUND

DRIP

JOINT UNION

LEG

Proper piping practice

NOTE: The unit gas supply entrance is factory sealed with plugs. Keep plugs in place until gas supply is ready to be installed. Once ready, replace the plugs with the supplied grommets and install gas supply line.

SYSTEM OPERATION

Gas Piping Checks

CAUTION

To prevent property damage or personal injury due to fire, the following instructions must be preformed regarding gas connections and pressure testing:
· The unit and its gas connections must be leak tested before placing in operation. Because of the danger of explosion or fire, never use a match or open flame to test for leaks. Never exceed specified pressures for testing. Higher pressure may damage gas valve and cause overfiring which may result in premature heat exchange failure.
· This unit and its shut-off valve must be disconnected from the gas supply during any pressure testing of that system at test pressures in excess of ½ PSIG (3.48 kPa).
· This unit must be isolated from the gas supply system by closing its manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than ½ PSIG (3.48 kPa).

WARNING

All propane gas equipment must conform to the safety standards of NFPA 58 - Liquefied Petroleum Gas Code.
For satisfactory operation, propane gas pressure must be within 9.7 - 10.3 inches w.c. for high fire at the manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors: 1. Vaporization rate, which depends on (a) temperature
of the liquid, and (b) wetted surface area of the container or containers. 2. Proper pressure regulation. 3. Pressure drop in lines between regulators, and between second stage regulator and the appliance. Pipe size required will depend on length of pipe run and total load of all appliances.
Tanks and Piping Complete information regarding tank sizing for vaporization, recommended regulator settings and pipe sizing is available from most regulator manufacturers and propane gas suppliers.

To avoid property damage or personal injury, be sure there is no open flame in the vicinity during air bleeding.
There will be air in the gas supply line after testing for leaks on a new installation. Therefore, the air must be bled from the line by loosening the ground joint union until pure gas is expelled. Tighten union and wait for five minutes until all gas has been dissipated in the air. Be certain there is no open flame in the vicinity during air bleeding procedure. The unit is placed in operation by closing the main electrical disconnect switch for the unit.

Since propane gas will quickly dissolve white lead or most standard commercial compounds, special pipe dope must be used. Shellac base compounds resistant to the actions of liquefied petroleum gases such as Gasolac®, Stalactic®, Clyde's® or John Crane® are satisfactory.
See the following figure for typical propane gas piping.

First Stage Regulator

5 to 15 PSIG (20 PSIG Max.)

Continuous 11" W.C.

PROPANE GAS INSTALLATIONS WARNING

200 PSIG Maximum

Second Stage Regulator

To avoid property damage, personal injury or death due to fire or explosion caused by a propane gas leak, install a gas detecting warning device. Since rust can reduce the level of odorant in propane gas, a gas detecting warning device is the only reliable way to detect a propane gas leak. Contact a local propane gas supplier about installing a gas detecting warning device.
IMPORTANT NOTE: Propane gas conversion kits must be installed to convert units to propane gas. NOx screens must be removed before converting to LP. Remove burner assembly and pull NOx screens from each burner tube. When all the screens are out, reassemble the burner assembly without the screens.

Typical propane gas piping
Roof Top Location and Installation The gas supply piping location and installation for roof top units must be in accordance with local codes or, in the absence of locals codes, with ordinances of the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54.

SYSTEM OPERATION

A manual gas shut off valve must be field installed external to the roof top unit. In addition, a drip leg must be installed near the inlet connection. A ground joint union connection is required between the external shut off valve and the unit connection to the gas valve to permit removal of the burner assembly for servicing.
1. Route gas piping to unit so that it does not interfere with the removal of access panels. Support and align piping to prevent strains or misalignment of the manifold assembly.
2. All units are furnished with standard female 1/2" NPT pipe connections. The size of the gas supply piping to the unit must be based on length of run, number of units on the system, gas characteristics, BTU requirement and available supply pressure. All piping must be done in accordance with local codes or, in the absence of local codes, with the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54.
NOTE: The gas connection size at the unit does NOT establish the size of the supply line. 3. These units are designed for either natural or
propane (LP) gas and are specifically constructed at the factory for only one of these fuels. The fuels are NOT interchangeable. However, the furnace can be converted in the field from natural gas to LP gas with the appropriate factory kit (see unit Technical Manual for the appropriate kit). Only a qualified contractor, experienced with natural and propane gas systems, should attempt conversion. Kit instructions must be followed closely to assure safe and reliable unit operation. 4. With all units on a common line operating under full fire, natural gas main supply pressure should be adjusted to approximately 7.0" w.c., measured at the unit gas valve. If the gas pressure at the unit is greater than 10.0" w.c., the contractor must furnish and install an external type positive shut off service pressure regulator. The unit will not function satisfactorily if supply gas pressure is less than 5.0" w.c. or greater than 10.0" w.c.. NOTE: A minimum horizontal distance of 48" between the regulator and the furnace flue discharge is required. 5. With all units on a common line operating under full LP gas main supply pressure should be at least 11.0" w.c. and must be no greater than 13.0" w.c., measured at the unit gas valve. Unit will not function satisfactorily if supply gas pressure is less than 11.0" w.c. or greater than 13.0" w.c..

6. All pipe connections should be sealed with a pipe thread compound, which is resistant to the fuel used with the furnace. A soapy water solution should be used to check all joints for leaks. A tap is located on the entering side of the gas valve for test gauge connection to measure supply (main) gas pressure. Another tap is provided on the manifold side of the gas valve for checking manifold pressure.
WARNING
This unit and its individual shutoff valve must be DISCONNECTED from the gas supply system during any pressure testing of that system at test pressures in excess of ½ PSIG (13.8" w.c.).
CAUTION
This unit must be ISOLATED from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing equal to or less than ½ PSIG.
7. There must be no obstruction to prevent the flow of combustion and ventilating air. A vent stack is not required and must never be used. The power venter will supply an adequate amount of combustion air as long as the air passageways are kept free of any obstructions and the recommended external unit clearances are maintained.
CIRCULATING AIR AND FILTERS Ductwork The supply duct from the unit through a wall may be installed without clearance. However, minimum unit clearances must be maintained (see "Clearances" section). The supply duct should be provided with an access panel large enough to inspect the air chamber downstream of the heat exchanger. A cover should be tightly attached to prevent air leaks.
Ductwork dimensions are shown in the roof curb installation manual.
If desired, supply and return duct connections to the unit may be made with flexible connections to reduce possible unit operating sound transmission.

SYSTEM OPERATION

CONDENSATE DRAIN CONNECTION
Condensate Drain Connection A 3/4" female NPT drain connection is supplied on the end of the unit and bottom of the drain pan for condensate piping. An external trap must be installed for proper condensate drainage. Hand tighten drain fitting to the drain connection.

Cleaning Due to the fact that drain pans in any air conditioning unit will have some moisture in them, algae and fungus will grow due to airborne bacteria and spores. Periodic cleaning is necessary to prevent this build-up from plugging the drain.
STARTUP, ADJUSTMENTS, AND CHECKS

WARNING

DRAIN PLUG (FACTORY-INSTALLED)

STANDARD SIDE DRAIN

Drain Pan (Side View)

HIGH VOLTAGE! To avoid personal injury or death due to electrical shock, bond the frame of this unit to the building electrical ground by use of the grounding terminal provided or other acceptable means. Disconnect all power before servicing or installing this unit.

Base Rail

Pre-Startup Instructions - General CAUTION

Open Vent

2" Min

See NOTE

To prevent property damage or personal injury, do not start the unit until all necessary pre-checks and tests have been performed.
Prior to the beginning of Startup, Adjustments, and Checks procedures, the following steps should be completed in the building.

Drain Plug

Roof Curb

NOTE: Trap should be deep enough to offset maximum unit stac difference. A minimum 4" trap is recommended.
drain connection

Install condensate drain trap as shown. Use 3/4" drain line and fittings or larger. Do not operate without trap.

Horizontal Drain Drainage of condensate directly onto the roof may be acceptable; refer to local code. It is recommended that a small drip pad of either stone, mortar, wood or metal be provided to prevent any possible damage to the roof.

Vertical Drain To use the bottom drain connection, remove the drain plug from the bottom connection and install it in the horizontal connection.

WARNING
MOVING MACHINERY HAZARD! To prevent possible personal injury or death, disconnect power to the unit and padlock in the "OFF" position before servicing fans.
CAUTION
To prevent property damage or personal injury, do not start the unit until all necessary pre-checks and tests have been performed.
This unit is equipped with an electronic ignition device to automatically light the main burners. It also has a power vent blower to exhaust combustion products. On new installations, or if a major component has been replaced, the operation of the unit must be checked.

SYSTEM OPERATION

Check unit operation as outlined in the following instructions. If any sparking, odors, or unusual sounds are encountered, shut off electrical power and recheck for wiring errors, or obstructions in or near the blower motors. Duct covers must be removed before operating unit.
The Startup, Adjustments, and Checks procedure provides a step-by-step sequence which, if followed, will assure the proper startup of the equipment in the minimum amount of time. Air balancing of duct system is not considered part of this procedure. However, it is an important phase of any air conditioning system startup and should be performed upon completion of the Startup, Adjustments, and Checks procedure. The Startup, Adjustments, and Checks procedure at outside ambients below 55°F should be limited to a readiness check of the refrigeration system with the required final check and calibration left to be completed when the outside ambient rises above 55°F.
Temporary Heating Or Cooling If the unit is to be used for temporary heating or cooling, a "Startup, Adjustments, and Checks" must first be performed in accordance with this manual. Damage or repairs due to failure to comply with these requirments are not covered under the warranty. After the machines are used for temporary heating or cooling, inspect the coils, fans, and motors for unacceptable levels of construction dust and dirt and install new filters.

Obstructions, Fan Clearance and Wiring Remove any extraneous construction and shipping materials that may be found during this procedure. Rotate all fans manually to check for proper clearances and that they rotate freely. Check for bolts and screws that may have jarred loose during shipment to the job site. Retighten if necessary. Re-tighten all electrical connections. Field Duct Connections Verify that all duct connections are tight and that there is no air bypass between supply and return.
Filter Section Check Remove filter section access panels and check that filters are properly installed. Note airflow arrows on filter frames.
Pre-startup Precautions It is important to your safety that the unit has been properly grounded during installation. Check ground lug connection in main control box for tightness prior to closing circuit breaker or disconnect switch. Verify that supply voltage on line side of disconnect agrees with voltage on unit identification plate and is within the utilization voltage range as indicated in Appendix B Electrical Data.
System Voltage - That nominal voltage value assigned to a circuit or system for the purpose of designating its voltage class.

Contractor Responsibility The installing contractor must be certain that: · All supply and return air ductwork is in place, properly
sealed, and corresponds with installation instructions. · All thermostats and sensors are mounted and wired in
accordance with installation instructions. · All electric power, all gas, hot water or steam line
connections, and the condensate drain installation have been made to each unit on the job. These main supply lines must be functional and capable of operating all units simultaneously. · Requirements are met for venting and combustion air. · Air filters are in place. · Input rate and temperature rise are adjusted per rating plate.

Nameplate Voltage - That voltage assigned to a piece of equipment for the purpose of designating its voltage class and for the purpose of defining the minimum and maximum voltage at which the equipment will operate.
Utilization Voltage - The voltage of the line terminals of the equipment at which the equipment must give fully satisfactory performance. Once it is established that supply voltage will be maintained within the utilization range under all system conditions, check and calculate if an unbalanced condition exists between phases. Calculate percent voltage unbalance as follows.

Roof Curb Installation Check Inspect the roof curb for correct installation. The unit and curb assembly should be level. Inspect the flashing of the roof mounting curb to the roof, especially at the corners, for good workmanship. Also check for leaks around gaskets. Note any deficiencies in a separate report and forward to the contractor.
35

SYSTEM OPERATION

Three Phase Models Only

2) MAXIMUM VOLTAGE DEVIATIONS

3) PERCENT VOLTAGE UNBALANCE

= 100 x

FROM AVERAGE VOLTAGE 1) AVERAGE VOLTAGE

HOW TO USE THE FORMULA:

EXAMPLE: Line to neutral voltage of 220, 216, and 213

1) Average Voltage = 220 + 216 + 213 = 649 / 3 = 216

2) Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4

Percent

Voltage

Unbalance

100

4 216

400 216

1.8%

Percent voltage unbalance MUST NOT exceed 2%.

AIR FLOW ADJUSTMENTS When the final adjustments are complete, the current draw of the motor should be checked and compared to the full load current rating of the motor. The amperage must not exceed the service factor stamped on the motor nameplate. The total airflow must not be less than that required for operation of the furnace. If an economizer is installed, check the unit operating balance with the economizer at full outside air and at minimum outside air.
NOTE: Never run high stage CFM below 300 CFM per ton evaporator freezing or poor unit performance is possible.

Purple wire Y2 (High Cool) and Brown wire W2 (High Heat) are connected to TB1-T3. These wires can be moved together or separately and placed on unoccupied terminal T4 or T5.
High Static Drive Motor These motors offer a higher flexibility in making airflow adjustments. Depending on the application the motor is set up to use motor speed taps T1 to T5 or T6 to T10. When heat is called speed taps T6 to T10 take the place of speed taps T1 to T5. Refer to Appendix A for blower performance at each speed tap. Refer to Appendix D for minimum and maximum airflow required for heating and cooling.
Fan speed for G (GR), is fixed at TB1-T1 and cannot be moved.
Low Cool Y1, Yellow (YL) is movable and set to TB1-T1
Low Heat W1, White (WH) is movable and set to TB1-T6
High Cool Y2, Purple (PU) is movable and set to TB1-T3
High Heat W2, Brown (BR) is movable and set to TB1-T8

Standard Static Drive Motor Adjust the CFM for the unit by changing the position of the low voltage leads on the terminal block TB1. Refer to Appendix A for blower performance at each speed tap. Refer to Appendix D for maximum and minimum allowed airflow for heating and cooling.
Fan speed for G (GR), is fixed at TB1-T1 and cannot be moved.
Low Cool Y1, Yellow (YL) is movable and set to TB1-T1

These wires can be moved together or separately and placed on any unoccupied terminal.
Note: YL can be moved to taps T2 to T3 as long as YL does not share the tap with PU. WH can be moved to tap T7 as long as WH does not share the tap with BR. When Heat is called TB1-W1 will also call TB1-DH, activating the second set of taps T6 to T10. If cooling and heating is called at the same time heating will take priority and taps T6 to T10 will be chosen by default.

Low Heat W1, White (WH) is movable and set to TB1-T2
High Cool Y2, Purple (PU) is movable and set to TB1-T3
High Heat W2, Brown (BR) is movable and set to TB1-T3
These wires can be moved together or separately and placed on any unoccupied terminal.
NOTE: YL can be moved to taps T2-T3 as long as YL does not share the tap with PU. WH can be moved to tap T3 as long as WH does not share the tap with BR.

NOTE: If more than one lead is energized simultaneously, the motor will run at the higher numerical speed tap for both standard static and high static drive motors. For proper operation Y2 and W2 should have a higher speed setting than G, Y1 and W1 for both standard static and high static drive motors.
For gas heat units, the airflow must be adjusted so that the air temperature rise falls within the ranges given stated on Data Plate.

SYSTEM OPERATION

Electrical Input Check Make preliminary check of evaporator fan ampere draw and verify that motor nameplate amps are not exceeded. A final check of amp draw should be made upon completion of air balancing of the duct system (see Appendix B).
GAS SYSTEM CHECK
Pre-Operation Checks 1. Close the manual gas valve external to the unit. 2. Turn off the electrical power supply to the unit. 3. Change heating setpoint to its lowest possible setting. 4. Remove the heat exchanger door on the side of the
unit by removing screws. 5. This unit is equipped with an ignition device which
automatically lights the main burner. DO NOT try to light burner by any other method. 6. Move the gas control valve switch to the OFF position. 7. Wait five minutes to clear out any gas. 8. Smell for gas, including near the ground. This is important because some types of gas are heavier than air. If you have waited five minutes and you do smell gas, immediately follow the warning WHAT TO DO IF YOU SMELL GAS on page 2 of this manual. If having waited for five minutes and no gas smell is noted, move the gas control valve switch to the ON position. 9. Replace the heat exchanger door on the side of the unit. 10. Open the manual gas valve external to the unit. 11. Turn on the electrical power supply to the unit. 12. Change heating setpoint to desired setting.

The first step in checking out the gas-fired furnace is to test the gas supply piping to the unit for tightness and purge the system of air using methods outlined in the latest edition of the National Fuel Gas Code ANSI Z223.1 / NFPA 54. Verify that the disconnect switch is in the "OFF" position. A soapy water solution should be used to check for gas leaks. Since the unit is subject to considerable jarring during shipment, it is extremely important that all gas connections and joints be tested for tightness. Gas piping downstream from the unit inlet should be checked for leaks during the subsequent sequence check.

The supply gas pressure should be adjusted to 7.0" w.c. on natural gas and 11" to 13.0" w.c. on LP gas with the gas burners operating. If there is more than one unit on a common gas line, the pressures should be checked with all units under full fire. A supply pressure tap is provided on the upstream side of the gas valve. A manifold pressure tap is provided on the manifold side of the gas valve. The normal manifold pressure for High fire is 3.5" w.c. on natural gas and 10.0" w.c. for propane gas. Low fire natural gas 2.0" w.c., 6.0" w.c. low fire propane gas. Minimum gas supply pressure is 5.0" w.c. for natural gas and 11.0" w.c. for propane gas.

Do not attempt adjustment of the built-in pressure

regulator unless the supply pressure is at least 5.0" w.c. on

natural gas or 11.0" w.c. on propane gas.

IGNITION ELECTRODE

FLAME SENSOR

Gas Supply Pressures & Regulator Adjustments WARNING

Should overheating occur or the gas supply fail to shut off, turn off the manual gas shutoff valve external to the unit before turning off the electrical supply.

flame sensor and ignition electrode location

WARNING
To avoid property damage, personal injury or death, do not fire gas unit with flue box cover removed.

NOTE: Except during brief periods when gas pressures are being measured by qualified service personnel, the furnace access panel must always be secured in place when the furnace is in operation. An inspection port in the access panel is provided to monitor the flame.
37

SYSTEM OPERATION

Ton

High Fire Rate

Number of
Burners

NG Orifice

LP Orifice

45,000

70,000

115,000

70,000

115,000

140,000

70,000

115,000

140,000

70,000

125,000

150,000

heat exchanger and burner orifice specifications

NOTE: Gas appliances located more than 2000 feet above sea level must be derated 4% per 1000 feet of total elevation and that variance in gas heating value and specific gravity require change in manifold pressure to obtain rating, it is mandatory that the input be adjusted at the installation site. All installations should be made as outlined in the latest edition of the National Fuel Gas Code ANSI Z223.1,section "Procedures To Be Followed To Place An Appliance in Operation". Refer also to the "User's Information Manual" supplied with the unit for additional information on the gas furnace.
Gas Supply And Manifold Check Gas supply pressure and manifold pressure with the burners operating must be as specified on the rating plate.

Gas Inlet Pressure Check Gas inlet pressure must be checked and adjusted in accordance to the type of fuel being consumed.

With Power And Gas Off: 1. Connect a manometer to the inlet pressure tap of the
gas valve. Inlet gas pressure can also be measured by removing the cap from the dripleg and installing a predrilled cap with a hose fitting.

With Power And Gas On: 2. Put unit into heating cycle and turn on all other gas
consuming appliances.

INLET GAS PRESSURE
NATURAL Mi n. 5.0" W.C., Ma x. 10.0" W.C.
PROPANE Mi n. 11.0" W.C., Ma x. 13.0" W.C.
NOTE: Inlet gas pressure must be within limits shown above.
If operating pressures differ from above, make necessary pressure regulator adjustments, check piping size, etc., and/or consult with local utility.
Manifold Pressure Check and Adjustment The gas valve has a pressure tap to facilitate measurement of the manifold pressure. The manifold pressure must be measured with the burners operating. 1. With disconnect switch open, remove field connected
thermostat wire from terminal R, W1 and W2 on TB1. Place jumper wire between R, W1 and W2 to engage high stage heat. 2. See Figure in gas input check section for gas valve adjustment.
To adjust the pressure regulator, remove the adjustment screw cover on the gas valve. Turn the adustment screw out (counterclockwise) to decrease pressure, turn in (clockwise) to increase pressure. Only small variations in gas flow should be made by means of the pressure regulator adjustment. Any major changes in flow should be made by changing the size of the burner orifices. The measured input rate to the furnace must not exceed the rating specified on the unit rating plate.
For natural gas, the high stage manifold pressure must be between 3.2 and 3.8 inches water column (3.5 nominal). Low stage manifold pressure must be between 1.7 to 2.3 inches water column (2.0 nominal). 3. To set low fire rate, open disconnect switch and
remove jumper from R to W2. To set low fire manifold pressure, repeat steps above. Refer to Figure in gas input check section for location of high and low stage pressure adjustment.
For propane gas, the manifold pressure must be between 9.7 and 10.3 inches water column (10.0 nominal). Low stage manifold must be between 5.7 and 6.3 inches water column (6.0 nominal).

SYSTEM OPERATION

Gas Input (Natural Gas Only) Check It is the responsibility of the contractor to adjust the gas input to the unit.
To measure the gas input use a gas meter and proceed as follows: 1. Turn off gas supply to all other appliances except the
unit. 2. With the unit operating, time the smallest dial on the
meter for one complete revolution. If this is a 2 cubic foot dial, divide the seconds by 2; if it is a 1 cubic foot dial, use the seconds as is. This gives the seconds per cubic foot of gas being delivered to the unit. 3. INPUT=GAS HTG VALUE x 3600 / SEC. PER CUBIC FOOT

Manometer Hose
Manometer

OFF ON

High Fire Regulator Adjust
(Under Cap Screw) Regulator Vent
Gas Flow

Example: Natural gas with a heating value of 1000 BTU per cubic foot and 34 seconds per cubic foot as determined by Step 2, then:
Input = 1000 x 3600 / 34 = 106,000 BTU per Hour.
NOTE: BTU content of the gas should be obtained from the gas supplier. This measured input must not be greater than shown on the unit rating plate.
Adjust input rate by varying the adjustment of the gas pressure regulator on the gas valve. All adjustments must be made with furnace operating at high fire and at normal operating temperature. A manometer should be connected to the gas valve to verify pressure is within the specified range (see following figures for manometer connections). Clockwise rotation of the pressure regulator screw increases pressure and gas flow rate. Turn screw counterclockwise to decrease pressure and gas flow rate. After adjustment the furnace temperature rise must be within the range specified on the unit data plate.
NOTE: Thermal efficiency of the furnace is a product efficiency rating determined under continuous operating conditions independent of any installed system.

white-rodgers (2-Stage) gas control valve connected to manometer pressure adjustments
To connect manometer to gas valve: 1. Back outlet pressure tap screw (inside inlet pressure
boss) out one turn (counterclockwise, not more than one turn). 2. Attach a hose and manometer to the outlet pressure boss of the valve.
To remove manometer from gas valve: 1. Remove manometer hose from outlet pressure boss. 2. Turn outlet pressure tap screw in to seal pressure port
(clockwise, 7 in-lb. minimum). 3. Turn on electrical power and gas supply to the system. 4. Turn on system power and energize valve. 5. Using a leak detection solution or soap suds, check
for leaks at pressure boss screw. Bubbles forming indicate a leak. SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY.
CAUTION
To prevent unreliable operation or equipment damage, the gas manifold pressure must be as specified on the unit rating plate. Only minor adjustments should be made by adjusting the gas valve pressure regulator.

6. Relight all other appliances turned off in step 1 of gas input check. Be sure all pilot burners are operating.
Main Burner Flame Check Flames should be stable, soft and blue (dust may cause orange tips but they must not be yellow) and extending directly outward from the burner without curling, floating or lifting off.

SYSTEM OPERATION

NOx Screen Check Verify that the alignment of the NOx screens is at 6 o' clock. In jurisdictions that do not require low NOx emissions, NOx screens may be removed.
Temperature Rise Check Check the temperature rise through the unit by placing thermometers in supply and return air registers as close to the unit as possible. Thermometers must not be able to sample temperature directly from the unit heat exchangers, or false readings could be obtained. 1. All registers must be open; all duct dampers must be
in their final (fully or partially open) position and the unit operated for 15 minutes before taking readings 2. The temperature rise must be within the range specified on the rating plate.
NOTE: Air temperature rise is the temperature difference between supply and return air. With a properly designed system, the proper amount of temperature rise will normally be obtained when the unit is operated at rated input with the recommended blower speed.
If the correct amount of temperature rise is not obtained, it may be necessary to change the blower speed. A higher blower speed will lower the temperature rise. A slower blower speed will increase the temperature rise.
NOTE: Blower speed MUST be set to give the correct air temperature rise through the unit as marked on the rating plate.
NORMAL SEQUENCE OF OPERATION
Heating This unit has one (RS) Manual Reset Limit Control Switch. Check the limit to make sure it has not tripped. The limit may arrive at the job site tripped as a result of shipping shock.

4. Operation of the venter motor closes the pressure switch PS located in the burner compartment. Unless excessive temperatures or shipping shock have opened high limit control ALS, power is fed to the integrated ignition control, which then initiates a 15-second pre-purge time delay. During this period, the venter fan will clear the combustion chamber of any residual gas.
5. After the pre-purge period, the ignition control energizes the Wl-C gas valve and simultaneously initiates a "three (3)-try" spark ignition sequence.
6. When the burners are ignited, a minimum one (1) micro-amp DC current will flow through the flame between the sensor electrode and the grounded burner.
7. When the controller proves that the flame has been established, it will keep the gas valve energized and discontinue the ignition spark.
8. If the control is unable to ignite the burners after its initial attempt, it will initiate another purge and spark sequence. A third purge and spark sequence will be initiated if the second attempt is unsuccessful. If the third attempt is unsuccessful, the controller will close the gas valve and lock itself out. It may be reset by momentarily interrupting power. This may be accomplished by briefly lowering the room thermostat set-point below room temperature, or by shutting off the main power to the unit.
9. Integrated ignition control will close its normally open contacts after a delay of approximately 30 seconds. This action energizes the blower motor contactor and starts the supply fan motor. Operation of the supply fan circulates air across the heat exchanger and delivers heated air to the conditioned space.
10. When the space temperature rises, the thermostat will open R-W. Opening R-W will cause the gas valve to close, and the furnace to shut down.
11. The furnace has three high temperature limit controls, which can shut down the burner. They do not shut down the venter motor.

If the venter motor comes on, but the unit does not attempt ignition, check if the ALS (Auxiliary High Limit Control Switch) requires resetting. 1. With electricity and gas turned on, the system switch
in the "HEAT" or "AUTO" position and the fan switch in the "AUTO" position, the thermostat will close the circuit between unit terminals R and W (R-W) when the temperature falls below the thermostat setting. 2. D1 on IIC energizes venter motor contactor. 3. Venter motor contactor energizes the venter motor.

Unit Shutdown 1. Set the room heating setpoint to lowest setting. 2. Turn off the electrical power supply to the unit. 3. Remove the heat exchanger door on the side of the
unit by removing screws. 4. Move the gas control valve switch to the OFF position. 5. Close manual gas shut off valve external to the unit. 6. Replace the heat exchanger door on the unit. 7. If cooling and/or air circulation will be desired, turn
ON gas control valve switch and the electrical power.

SYSTEM OPERATION

Automatic Reset High Limit Control (LS) Located in the burner compartment on the heat exchanger, its sensing element projects through the blower section bulkhead and senses the temperature at the rear of the furnace. It will cycle the furnace off if the temperature exceeds 100°F plus maximum rise.
Auxiliary High Limit Control (ALS) Located in the blower compartment on the blower housing, it senses air temperature within the blower compartment and protects the filters from excessive temperature. It will shut down the furnace if it senses excessive temperatures.
Elevated temperatures at the control are normally caused by blower failure. The reason for the shut down should be determined and repaired prior to resetting.
Manual Reset Flame Rollout Control (RS) Located in the burner compartment at the top of the burner assembly, it senses high temperature that could occur if the heat exchanger tubes were plugged and the flame was rolling out instead of entering the tubes. It has a manual push-button reset that cannot be actuated until the limit control has cooled. The reason for elevated temperatures at the control should be determined and repaired prior to resetting this manual reset control.

To confirm charge levels or, if a leak occurs and charge needs to be added to the system, it is recommended to evacuate the system and recharge refrigerant to the unit's nameplate specifications. This unit has been rated in the cooling mode at the AHRI rated conditions of: indoor (80°F db/67°F wb) and outdoor (95°F db). While operating at this condition, the superheat should range from 9°F to 11°F for each refrigeration circuit measured at the suction service port located near the compressor.
Start-Up Procedure and Checklist Begin with power turned off at all disconnects.
1. Turn thermostat system switch to "Cool," and fan switch to "Auto" and turn temperature setting as high as it will go.
2. Inspect all registers and set them to the normal open position.
3. Turn on the electrical supply at the disconnect.
4. Turn the fan switch to the "ON" position. The blower should operate after a 7 second delay.
5. Turn the fan switch to "Auto" position. The blower should stop after a 60 second delay.
6. Slowly lower the cooling temperature until the unit starts. The compressor, blower and fan should now be operating. Allow the unit to run 10 minutes, make sure cool air is being supplied by the unit.
7. Turn the temperature setting to the highest position, stopping the unit. The indoor blower will continue to run for 60 seconds.

WARNING
To avoid property damage, personal injury or death due to fire or explosion, a qualified servicer must investigate the reason for the rollout protection device to open before manually resetting the rollout protection device.
Refrigeration System Checks This unit is equipped with thermal expansion valves.
Ensure the hold-down bolts on the compressor are secure and have not vibrated loose during shipment. Check that the vibration grommets have been installed and visually check all piping for damage and leaks and repair if necessary. The entire system has been factory charged and tested, making it unnecessary to field charge. Factory refrigerant charge is shown on the unit's nameplate.

Turn the thermostat system switch to "OFF" and disconnect all power when servicing the unit.
Refrigeration Sequence Check 1. 24VAC control voltage is provided by the control
transformer to terminal XS. The control voltage is passed through any installed safety shutdown devices such as the smoke detector before providing 24VAC to terminals ES and R. 2. To simulate a mechanical call for cooling lower the room cooling setpoint to a value below the current room temperature. The cooling is energized when the room temperature is above the setpoint for cooling. 3. UNIT WITH ECONOMIZER OPTION: The compressor circuit is interlocked through the economizer module. If the outdoor air enthalpy (temperature and humidity) is not suitable for cooling, the economizer will permit the compressor to be energized. 4. The blower motor is operated to provide cool supply air to the space.

SYSTEM OPERATION

5. Compressor contactor closes its contacts to provide power to the compressor motor. In addition, the condenser fan motor is energized through the compressor contactor.
WARNING
BURN HAZARD! Do not touch! Discharge line may be hot!
6. Check that the compressor is operating correctly. The scroll compressors in these units MUST operate in the proper rotation. To ensure the compressor is operating in the correct direction, check the compressor discharge line pressure or temperature after the compressor is started.
The discharge pressure and discharge line temperature should increase. If this does not occur and the compressor is producing an exceptional amount of noise, perform the following checks. · If the compressor is operating backward, disconnect
the unit power supply and lock it in the "OFF" position. Switch two leads of the power supply at the unit Single Point Power Block. Reconnect power and check for compressor and condenser fan motor operation. 7. With all safety devices closed, the system will
continue cooling operation until the room temperature is satisfied. 8. Increasing the room cooling setpoint to a value above the current room temperature will simulate a satisfied thermostat. The compressor and the supply fan will cycle off. 9. After a time delay of approximately 3 minutes, the compressor control circuits will be ready to respond to a subsequent call for cooling.

Final System Checks 1. Check to see if all supply and return air grilles are
adjusted and the air distribution system is balanced for the best compromise between heating and cooling. 2. Check for air leaks in the ductwork. See Sections on Air Flow Adjustments. 3. Make sure the unit is free of "rattles", and the tubing in the unit is free from excessive vibration. Also make sure tubes or lines are not rubbing against each other or sheet metal surfaces or edges. If so, correct the trouble. 4. Set the thermostat at the appropriate setting for cooling and heating or automatic changeover for normal use. 5. Be sure the Owner is instructed on the unit operation, filter, servicing, correct thermostat operation, etc.

Refrigeration Performance Check Check that compressor RLA corresponds to values shown in Appendix B. RLA draw can be much lower than values listed at low load conditions and low ambient condensing temperatures. Values in Appendix B can slightly exceed at high load conditions and high ambient condensing temperatures.

SERVICING TABLE OF CONTENTS

S-1 Checking Voltage............................................ 46 S-2 Checking Wiring............................................. 47 S-3 Checking Thermostat, Wiring, And Anticipator........................................................... 47 S-3A Thermostat and Wiring................................ 47 S-3B Cooling Anticipator..................................... 47 S-3C Heating Anticipator...................................... 48 S-4 Checking Transformer And control circuit. 48 S-7 Checking Contactor And/Or Relays............... 48 S-8 Checking Contactor Contacts........................ 49 S-9 Checking Fan Relay Contacts.......................... 49 S-11 Checking Loss Of Charge Protector............ 50 S-12 Checking High Pressure Control ................. 51 S-13 Checking Low Pressure Control.................. 51 S-15 Checking Capacitor....................................... 51 S-15A Resistance Check......................................... 52 S-15B Capacitance Check....................................... 52 S-16 Checking Motors.......................................... 53 S-16A Checking Fan And Blower Motor Windings (Psc Motors)......................................................... 53 S-16D Checking Eem (Energy Efficient Motor Motors.................................................................. 53 S-17 Checking Compressor Windings................... 54 S-17A Resistance Test............................................ 54 S-17B Ground Test................................................ 55 S-18 Testing crankcase heater (Optional Item).... 55 S-18A Checking Crankcase Heater Thermostat.... 55 S-21 Checking Reversing Valve And Solenoid...... 56 S-24 Testing Defrost Control............................... 56 S-25 Testing Defrost Thermostat......................... 56 S-50 Checking Heater Limit Control(s)................. 57 S-52 Checking Heater Elements............................ 57 S-100 Refrigeration Repair Practice.................... 57

S-101 Leak Testing (nitrogen or nitrogen-traced)............................ 58 S-102 Evacuation................................................... 58 S-103 Charging..................................................... 59 S-104 Checking Compressor Efficiency................ 60 S-104 Checking Compressor Efficiency................ 60 S-106 Overfeeding................................................ 60 S-108 Superheat.................................................... 60 S-109 Checking Subcooling.................................. 61 S-110 Checking Expansion Valve Operation......... 61 S-111 Fixed Orifice Restriction Devices................ 64 S-112 Checking Restricted Liquid Line.................. 64 S-113 Overcharge Of Refrigerant....................... 64 S-114 Non-Condensables...................................... 64 S-115 Compressor Burnout.................................. 65 S-200 Checking External Static Pressure............. 65 S-201 Checking Temperature Rise......................... 66 S-206 Indoor Fan Rotation Check......................... 66 S-300 Testing Primary Limit Control................... 66 S-301 Testing Auxiliary Limit................................ 67 S-302 Checking Flame Rollout Switch................. 68 S-303 Testing Inducer Motor............................... 69 S-304 Testing Gas Valve........................................ 69 S-305 Checking Main Burners.............................. 69 S-306 Checking Orifices........................................ 70 S-307 Checking Gas Pressure................................ 70 S-308 Checking For Delayed Ignition................... 71 S-309 Checking For Flashback.............................. 71 S-310 Checking Pressure Control........................ 71 S-311 High Altitude Application.......................... 72 S-313 Testing Ignition Control Module .............. 73 S-314 Checking Flame Sensor............................... 75

SYMPTOM System will not start Compressor will not start - fan runs Comp. and Cond. Fan will not start Evaporator fan will not start Condenser fan will not start Compressor runs - goes off on overload Compressor cycles on overload System runs continuously - little cooling Too cool and then too warm Not cool enough on warm days Certain areas too cool, others too warm Compressor is noisy Low suction pressure High suction pressure High head pressure
See Service Procedure Ref.

SERVICING
Complaint

COOLING ANALYSIS CHART

No Cooling

Unsatisfactory Cooling

System Operating Pressures

POSSIBLE CAUSE
DOTS IN ANALYSIS GUIDE INDICATE
"POSSIBLE CAUSE"

Test Method Remedy

Power Failure Blown Fuse Unbalanced Power, 3PH Loose Connection Shorted or Broken Wires Open Fan Overload Faulty Thermostat Faulty Transformer Shorted or Open Capacitor Internal Compressor Overload Open Shorted or Grounded Compressor Compressor Stuck Faulty Compressor Contactor Faulty Fan Relay Open Control Circuit Low Voltage Faulty Evap. Fan Motor Shorted or Grounded Fan Motor Improper Cooling Anticipator Shortage of Refrigerant Restricted Liquid Line Dirty Air Filter Dirty Indoor Coil Insufficient air across Indoor Coil Too much air across Indoor Coil Overcharge of Refrigerant Dirty Outdoor Coil Noncondensibles Recirculation of Condensing Air Infiltration of Outdoor Air Improperly Located Thermostat Air Flow Unbalanced System Undersized Broken Internal Parts Broken Valves Inefficient Compressor Expansion Device Restricted Loose Hold-down Bolts Flowrator Not Seating Properly
44

Test Voltage

· ··

··

······

Inspect Fuse Size & Type Test Voltage Inspect Connection - Tighten Test Circuits With Ohmmeter

··

Test Continuity of Overload

· ··

··

· ····

Test Continuity of Thermostat & Wiring Check Control Circuit with Voltmeter Test Capacitor Test Continuity of Overload

··

· ··

Test Motor Windings Use Test Cord Test Continuity of Coil & Contacts Test Continuity of Coil And Contacts Test Control Circuit with Voltmeter

··

Test Voltage

Repair or Replace

· Test Motor Windings

Check Resistance of Anticipator

··

Test For Leaks, Add Refrigerant

·· · · ·

·· ·· ··

· Remove Restriction, Replace Restricted Part

Inspect Filter-Clean or Replace

· ·
·

Inspect Coil - Clean Check Blower Speed and Rotation, Belt, Pulleys, Duct Static, Filter Reduce Blower Speed, Check Pulley Adjustment

··

· · Recover Part of Charge

··· ·

· Inspect Coil - Clean

·· ·

· Recover Charge, Evacuate, Recharge

·· ·

· Remove Obstruction to Air Flow

· ··

··

Check Windows, Doors, Vent Fans, Etc. Relocate Thermostat Readjust Air Volume Dampers Refigure Cooling Load Replace Compressor

Test Compressor Efficiency

··· ·

· Remove Restriction, Replace Expansion Device

Tighten Bolts

Check Flowrator & Seat or Replace Flowrator

· Cooling Cycle

S-1 S-1 S-1 S-2, S-3 S-2, S-3 S-17A S-3 S-4 S-15 S-17A S-17B S-17D S-7, S-8 S-7 S-4 S-1 S-16 S-16 S-3B S-101,103 S-112
S-200,205, 206, 207 S-205, 207 S-113
S-114
S-115 S-104 S-104
111
S-111

SERVICING
Complaint

GAS HEATING ANALYSIS CHART

No Heat

Unsatisfactory Heat

SYMPTOM System Will Not Start Burner Won't Ignite Burner Ignites-Locks Out Burner Lights - Little or No Air Through Vents Burner Shuts Off prior to T'Stat being Satasfied Short Cycles Long Cycles Soot and /or Fumes To Much Heat Not Enough Heat
See Service Procedure Reference

POSSIBLE CAUSE
DOTS IN ANALYSIS GUIDE INDICATE
"POSSIBLE CAUSE"

Test Method Remedy

Power Failure Blown Fuse Loose Connection Shorted or Broken Wires No Low Voltage Faulty Thermostat Faulty Transformer Poor or High Resistance Ground Improper Heat Anticipator Setting Improper Thermostat Location Faulty Limit or Roll Out Switch Faulty Flame Sensor Faulty Ignition Control Gas Valve or Gas Supply Shut Off Faulty Induced Draft Blower Dirty Flame Sensor, Low uA Flame Sensor not in Flame, Low uA Faulty Gas Valve
Open Auxillary Limit
Improper Air Flow or Distribution
Faulty Blower Motor, Belt, or Pulley
Locking out on Main Limit
Delayed Ignition Flashback Orifice Size Gas Pressure Cracked Heat Exchanger Stuck Gas Valve Furnace Undersized Faulty Pressure Switch Blocked or Restricted Flue Open Roll Out Switch Bouncing On Pressure Switch

Test Voltage

Check Wiring

Check Transformer

··

Check Thermostat

Check Transformer

Measure Ground Resistance

··

· · Adjust Heat Anticipator Setting

··

· · Relocate Thermostat

Test Control

Test Flame Sensor

····

Test Control

Turn Valves to On Position

··

Test Blower

Clean Flame Sensor

Test/Adjust Position of Flame Sensor

· Replace Gas Valve

· ··

Check Blower Speed, Rotation, Belt, Pulleys, Duct Static, Filter

··

· Check Blower Speed, Rotation, Belt, Pulleys, Duct Static, Filter

Check Blower Speed, Rotation, Belt, Pulleys, Duct Static, Filter

··
· · ·· · ··
·

· Check Limit, Gas Press., Temp. Rise, Blower Rotation, Belt, Pulleys, Duct Static, Filter

Test for Delayed Ignition

Test for Flashback

· · · Check Orifices

· · · Check Gas Pressure

Check Burner Flames

··

Replace Gas Valve

· Replace with Proper Size Furnace

Test Pressure Switch

Check Flue/Drawdown Pressure

Test Control

Test Negative Pressure, Flue Blockage

S-1 S-1 S-2, S-3 S-2, S-3 S-4 S-3 S-4 S-313 S-3
S-300-302 S-314 S-313 S-304 S-303 S-314 S-314 S-304
S16A,16D,200, 201,205,206,207 S16A,16D,200, 201,205,206,207 S16A,16D,200, 201,205,206,207
S-300, 307, 201
S-308 S-309 S-306 S-307 S-302 S-304
S-310 S-310 S-302 S-310

SERVICING

S-1 Checking Voltage
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Remove doors, control panel cover, etc. from unit being tested.
With power ON:
WARNING
Line Voltage now present.
2. Using a voltmeter, measure the voltage across terminals L1 and L2 of the contactor for single phase units, and L3, for 3 phase units.
3. No reading - indicates open wiring, open fuse(s) no power or etc. from unit to fused disconnect service. Repair as needed.
4. With ample voltage at line voltage connectors, energize the unit.
5. Measure the voltage with the unit starting and operating, and determine the unit Locked Rotor Voltage.
Locked Rotor Voltage is the actual voltage available at the compressor during starting, locked rotor, or a stalled condition. Measured voltage should be above minimum listed in chart below.

Unit Supply Voltage

Voltage Min.

208/230 198

460

437

575

546

Max. 253 506 604

Three phase units require a balanced 3 phase power supply to operate. If the percentage of voltage imbalance exceeds 3% the unit must not be operated until the voltage condition is corrected.

% Voltage = Imbalance

Max. Voltage Deviation From Average Voltage X 100
Average Voltage

To find the percentage of imbalance, measure the

incoming power supply.

L1 - L2 = 240V

L1 - L3 = 232V Avg. V = 710 = 236.7

L2 - L3 = 238V

Total 710V

To find Max. deviation: 240 - 236.7 = +3.3 232 - 236.7 = -4.7 238 - 236.7 = +1.3
Max deviation was 4.7V % Voltage Imbalance = 4.7 = 1.99%
236.7

If the percentage of imbalance had exceeded 3%, it must be determined if the imbalance is in the incoming power supply or the equipment. To do this rotate the legs of the incoming power and retest voltage as shown below.

To measure Locked Rotor Voltage attach a voltmeter to the run "R" and common "C" terminals of the compressor, or to the T1 and T2 terminals of the contactor. Start the unit and allow the compressor to run for several seconds, then shut down the unit. Immediately attempt to restart the unit while measuring the Locked Rotor Voltage.

6. Voltmeter should read within the voltage tabulation as shown. If the voltage falls below the minimum voltage, check the line wire size. Long runs of undersized wire can cause low voltage. If wire size is adequate, notify the local power company in regards to either low or high voltage.

SERVICING

S-3 Checking Thermostat, Wiring, And Anticipator

L1 L2 L3

L1 - L2 = 240V L1 - L3 = 227V L2 - L3 = 238V
Rotate all 3 incoming legs as shown.

THERMOSTAT WIRE SIZING CHART

LENGTH OF RUN
25 feet 50 feet 75 feet 100 feet 125 feet 150 feet

MIN. COPPER WIRE GAUGE (AWG) 18 16 14 14 12 12

S-3A Thermostat and Wiring

L1 L2 L3

L1 - L2 = 227V L1 - L3 = 238V L2 - L3 = 240V

By the voltage readings we see that the imbalance rotated or traveled with the switching of the incoming legs. Therefore the imbalance lies within the incoming power supply.

If the imbalance had not changed then the problem would lie within the equipment. Check for current leakage, shorted motors, etc.

S-2 Checking Wiring

WARNING
Line Voltage now present.
With power ON, thermostat calling for cooling 1. Use a voltmeter to check for 24 volts at thermostat
wires C and Y in the unit control panel. 2. No voltage indicates trouble in the thermostat or
wiring. 3. Check the continuity of the thermostat and wiring.
Repair or replace as necessary.
Indoor Blower Motor With power ON:
WARNING
Line Voltage now present.

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Check wiring visually for signs of overheating, damaged insulation and loose connections.
2. Use an ohmmeter to check continuity of any suspected open wires.
3. If any wires must be replaced, replace with comparable gauge and insulation thickness.

1. Set fan selector switch at thermostat to "ON" position.
2. With voltmeter, check for 24 volts at wires C and G. 3. No voltage indicates the trouble is in the thermostat
or wiring. 4. Check the continuity of the thermostat and wiring.
Repair or replace as necessary.
S-3B Cooling Anticipator The cooling anticipator is a small heater (resistor) in the thermostat. During the "off" cycle, it heats the bimetal element helping the thermostat call for the next cooling cycle. This prevents the room temperature from rising too high before the system is restarted. A properly sized anticipator should maintain room temperature within 1 1/2 to 2 degree range.
The anticipator is supplied in the thermostat and is not to be replaced. If the anticipator should fail for any reason, the thermostat must be changed.
47

SERVICING

S-3C Heating Anticipator The heating anticipator is a wire-wound adjustable heater, which is energized during the "ON" cycle to help prevent overheating of the conditioned space.
The anticipator is a part of the thermostat and if it should fail for any reason, the thermostat must be replaced. See the following for recommended heater anticipator setting.
To determine the proper setting, use an ammeter to measure the current on the "W" wire going to the thermostat.
Use an amprobe as shown below. Wrap 10 turns of thermostat wire around the stationary jaw of the amprobe and divide the reading by 10.

1. Remove control panel cover to gain access to transformer.
With power ON:
WARNING
Line Voltage now present.
2. Using a voltmeter, check voltage across secondary voltage side of transformer (R to C).
3. No voltage indicates faulty transformer, bad wiring, or bad splices.
4. Check transformer primary voltage at incoming line voltage connections and/or splices.
5. If line voltage available at primary voltage side of transformer and wiring and splices good, transformer is inoperative. Replace.

10 TURNS OF THERMOSTAT WIRE (From "W" on thermostat) STATIONARY JAW OF AMPROBE

S-7 Checking Contactor And/Or Relays
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

READS 4 AMPS CURRENT DRAW WOULD BE .4 AMPS
Checking Heat Anticipator Amp Draw
S-4 Checking Transformer And control circuit
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

The compressor contactor and other relay holding coils are wired into the low or line voltage circuits. When the control circuit is energized, the coil pulls in the normally open contacts or opens the normally closed contacts. When the coil is de-energized, springs return the contacts to their normal position.
NOTE: Most single phase contactors break only one side of the line (L1), leaving 115 volts to ground present at most internal components. 1. Remove the leads from the holding coil. 2. Using an ohmmeter, test across the coil terminals.
If the coil does not test continuous, replace the relay or contactor.

A step-down transformer (either 208-240, 460 or 575 volt primary to 24 volt secondary) is provided with each unit. This allows ample capacity for use with resistance heaters.

WARNING
Disconnect ALL power before servicing.

SERVICING

S-8 Checking Contactor Contacts
SINGLE PHASE
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Disconnect the wire leads from the terminal (T) side of the contactor.
2. With power ON, energize the contactor.
WARNING
Line Voltage now present.

T3 T2 T1

VOLT/OHM METER

CC L3 L2 L1

Ohmmeter for testing holding coil Voltmeter for testing contacts
TESTING COMPRESSOR CONTACTOR (Three Phase)
S-9 Checking Fan Relay Contacts
DSG: The fan relays are incorporated into the control board. See section S-313 for checking control board for single phase gas models.
For 3 phase and belt drive models, the procedure for testing the fan relay contacts will be the same as checking the compressor contactor contacts (See section S-8).

VOLT/OHM METER

DRC/DRH: The Electronic Blower Time Delay Relay is used on PSC and belt driven models.

Ohmmeter for testing holding coil Voltmeter for testing contacts
TESTING COMPRESSOR CONTACTOR (Single Phase)
3. Using a voltmeter, test across terminals. A. L1 - L2 - No voltage. Check breaker or fuses on main power supply. B. L2 - T1 - No voltage indicates CC1 contacts open.
If a no voltage reading is obtained - replace the contactor.
THREE PHASE Using a voltmeter, test across terminals.
A. L1-L2, L1-L3, and L2-L3 - If voltage is present, proceed to B. If voltage is not present, check breaker or fuses on main power supply..
B. T1-T2, T1-T3, and T2-T3 - If voltage readings are not the same as in "A", replace contactor.

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
Checking EBTDR High Voltage Contacts 1. With power off, remove wires from terminals NC,
COM, and NO. 2. Using a VOM, check for resistance from NO to COM.
Should read open. Next, check for resistance from NC to COM. Should read closed. 3. If not as above, replace EBTDR.
Checking EBTDR Contact Operation With power on:
1. Set the thermostat to the fan "on" position.
49

SERVICING

2. Check for 24 volts at the C and G terminals of the EBTDR.
3. If no voltage present, check fan circuit from thermostat. If 24 volts present, proceed to step 4.
4. Using a VOM, check for line voltage from the purple wire at the transformer (terminal 3 on 240 volt units, terminal 2 on 208 volt units) to terminal NO on the EBTDR. Should read line voltage. If no voltage present, check line voltage wiring in unit. If line voltage present, proceed to step 5.
5. Using a VOM, check for line voltage from the purple wire at the transformer (terminal 3 on 240 volt units, terminal 2 on 208 volt units) to the COM terminal on the EBTDR. Should read line voltage. If not as above, replace EBTDR.

4. Using a VOM, check for 240 volts from terminals 3 and 1 of relay. Should read 240 volts. In no voltage, check wiring from heater kit to relay. If voltage present, proceed to step 5.
5. Using a VOM, check for 240 volts from L1 at contactor to terminal 4 of relay. Should read 240 volts. Next check from L1 at contactor to terminal 2 of relay. Should read 240 volts.
If not as above, replace relay.
On the 5 ton units with the EEM motor, a standard fan relay is used.

PSC equipped, single phase model coolers and heat pumps have an isolation relay with a 240 volt holding coil in addition to the EBTDR.
WARNING
Disconnect ALL power before servicing.
Turn power off.
Testing relay holding coil 1. Remove the leads from the holding coil terminals 1
and 3. 2. Using an ohmmeter, test across the coil terminals 1
and 3. If the coil does not test continuous, replace the relay.
Testing relay contacts
WARNING
Disconnect ALL power before servicing.

1. Apply 24 volts to coil terminals 1 and 3. 2. Using a VOM, check for 24 volts from terminals 3
and 2 of relay. Should read 24 volts. If no voltage, check low voltage wiring from transformer to relay. If voltage present, proceed to step 5. 3. Using a VOM, check for 24 volts from terminals 3 and 4 of relay. Should read 24 volts.
If not as above, replace relay.
S-11 Checking Loss Of Charge Protector
(Heat Pump Models) The loss of charge protector senses the pressure in the liquid line and will open its contacts on a drop in pressure. The low pressure control will automatically reset itself with a rise in pressure.

Turn power off. 1. Using a VOM, test resistance across relay terminals 2
and 4. Should read open. 2. Turn power on.

The low pressure control is designed to cut-out (open) at approximately 22 PSIG. It will automatically cut-in (close) at approximately 50 PSIG.
Test for continuity using a VOM and if not as above, replace the control.

3. Apply 240 volts to coil terminals 1 and 3. 50

SERVICING

S-12 Checking High Pressure Control
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

S-13 Checking Low Pressure Control The low pressure control senses the pressure in the suction line and will open its contacts on a drop in pressure. The low pressure control will automatically reset itself with a rise in pressure.
The low pressure control is designed to cut-out (open) at approximately 22 PSIG ± 7 PSIG. It will automatically cut-in (close) at approximately 50 PSIG ± 7 PSIG.

The high pressure control senses the pressure in the discharge line. If abnormally high discharge pressures develop, the contacts of the control open, breaking the control circuit before the compressor motor overloads. This control is automatically reset. 1. Using an ohmmeter, check across terminals of
high pressure control, with wire removed. If not continuous, the contacts are open. 2. Attach a gauge to the access fitting on the liquid line.
With power ON:
3. Start the system and place a piece of cardboard in front of the condenser coil, raising the condensing pressure.
4. Check pressure at which the high pressure control cuts-out.

Test for continuity using a VOM and if not as above, replace the control.
S-15 Checking Capacitor
Capacitor, Run A run capacitor is wired across the auxiliary and main windings of a single phase permanent split capacitor motor. The capacitors primary function is to reduce the line current while greatly improving the torque characteristics of a motor. This is accomplished by using the 90° phase relationship between the capacitor current and voltage in conjunction with the motor windings so that the motor will give two phase operation when connected to a single phase circuit. The capacitor also reduces the line current to the motor by improving the power factor.
Capacitor, Start Scroll Compressor Models (Single Phase Compressors Only) Hard start components are not required on Scroll compressor equipped units due to a non-replaceable check valve located in the discharge line of the compressor. However hard start kits are available and may improve low voltage starting characteristics.

If it cuts-out at 660 PSIG ± 10 PSIG, it is operating normally (See causes for high head pressure in Service Problem Analysis Guide). If it cuts out below this pressure range, replace the control. The control should reset at 420 PSIG ± 25 PSIG.

This check valve closes off high side pressure to the compressor after shut down allowing equalization through the scroll flanks. Equalization requires only about one or two seconds during which time the compressor may turn backwards.
Your unit comes with a 180-second anti-short cycle to prevent the compressor from starting and running backwards.

SERVICING

Models Equipped With A Hard Start Device A start capacitor is wired in parallel with the run capacitor to increase the starting torque. The start capacitor is of the electrolytic type, rather than metallized polypropylene as used in the run capacitor.
A switching device must be wired in series with the capacitor to remove it from the electrical circuit after the compressor starts to run. Not removing the start capacitor will overheat the capacitor and burn out the compressor windings.
These capacitors have a 15,000 ohm, 2 watt resistor wired across its terminals. The object of the resistor is to discharge the capacitor under certain operating conditions, rather than having it discharge across the closing of the contacts within the switching device such as the Start Relay, and to reduce the chance of shock to the servicer. See the Servicing Section for specific information concerning capacitors.
Relay, Start A potential or voltage type relay is used to take the start capacitor out of the circuit once the motor comes up to speed. This type of relay is position sensitive. The normally closed contacts are wired in series with the start capacitor and the relay holding coil is wired parallel with the start winding. As the motor starts and comes up to speed, the increase in voltage across the start winding will energize the start relay holding coil and open the contacts to the start capacitor.

OHMMETER
CAPACITOR
Testing Capacitor Resistance
2. Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor A. Good Condition - indicator swings to zero and slowly returns to infinity. (Start capacitor with bleed resistor will not return to infinity. It will still read the resistance of the resistor). B. Shorted - indicator swings to zero and stops there -replace. C. Open - no reading - replace. (Start capacitor would read resistor resistance.)
S-15B Capacitance Check Using a hookup as shown below, take the amperage and voltage readings and use them in the formula:

Two quick ways to test a capacitor are a resistance and a capacitance check.

VOLTMETER

S-15A Resistance Check

15 AMP FUSE

AMMETER CAPACITOR
Testing Capacitance

SERVICING

WARNING
Discharge capacitor through a 20 to 30 OHM resistor before handling.
Capacitance (MFD) = 2650 X Amperage Voltage
S-16 Checking Motors
S-16A Checking Fan And Blower Motor Windings (Psc Motors) Applies only to units with PSC Motors
The auto reset fan motor overload is designed to protect the motor against high temperature and high amperage conditions by breaking the common circuit within the motor, similar to the compressor internal overload. However, heat generated within the motor is faster to dissipate than the compressor, allow at least 45 minutes for the overload to reset, then retest.
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Remove the motor leads from its respective connection points and capacitor (if applicable).
2. Check the continuity between each of the motor leads.
3. Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead.

1. Using a voltmeter, check for 230 volts to the motor connections L and N. If 230 volts is present, proceed to step 2. If 230 volts is not present, check the line voltage circuit to the motor.
2. Using a voltmeter, check for 24 volts from terminal C to either terminal 1, 2, 3, 4, or 5, depending on which tap is being used, at the motor. If voltage present, proceed to step 3. If no voltage, check 24 volt circuit to motor.
3. If voltage was present in steps 1 and 2, the motor has failed and will need to be replaced.
NOTE: When replacing motor, ensure the belly band is between the vents on the motor and the wiring has the proper drip loop to prevent condensate from entering the motor.
High Voltage Connections
3/16"
C LGN
1 2345
Low Voltage Connections 1/4"
EEM Motor Connections

If the windings do not test continuous or a reading is obtained from lead to ground, replace the motor.

S-16D Checking Eem (Energy Efficient Motor Motors Applies only to units with EEM Motors

The EEM Motor is a one piece, fully encapsulated, 3 phase brushless DC (single phase AC input) motor with ball bearing construction. Unlike the ECM 2.3/2.5 motors, the EEM features an integral control module.

SERVICING

S-17 Checking Compressor Windings
WARNING
Hermetic compressor electrical terminal venting can be dangerous. When insulating material which supports a hermetic compressor or electrical terminal suddenly disintegrates due to physical abuse or as a result of an electrical short between the terminal and the compressor housing, the terminal may be expelled, venting the vapor and liquid contents of the compressor housing and system.
If the compressor terminal PROTECTIVE COVER and gasket (if required) are not properly in place and secured, there is a remote possibility if a terminal vents, that the vaporous and liquid discharge can be ignited, spouting flames several feet, causing potentially severe or fatal injury to anyone in its path.
This discharge can be ignited external to the compressor if the terminal cover is not properly in place and if the discharge impinges on a sufficient heat source.
Ignition of the discharge can also occur at the venting terminal or inside the compressor, if there is sufficient contaminant air present in the system and an electrical arc occurs as the terminal vents.
Ignition cannot occur at the venting terminal without the presence of contaminant air, and cannot occur externally from the venting terminal without the presence of an external ignition source.
Therefore, proper evacuation of a hermetic system is essential at the time of manufacture and during servicing.

S-17A Resistance Test Each compressor is equipped with an internal overload.
The line break internal overload senses both motor amperage and winding temperature. High motor temperature or amperage heats the disc causing it to open, breaking the common circuit within the compressor on single phase units.
Heat generated within the compressor shell, usually due to recycling of the motor, high amperage or insufficient gas to cool the motor, is slow to dissipate. Allow at least three to four hours for it to cool and reset, then retest.
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Remove the leads from the compressor terminals.
See warnings S-17 before removing compressor terminal cover.
2. Using an ohmmeter, test continuity between terminals S-R, C-R, and C-S, on single phase units or terminals T1, T2 and T3, on 3 phase units.

To reduce the possibility of external ignition, all open flame, electrical power, and other heat sources should be extinguished or turned off prior to servicing a system.

OHMMETER

COMP

Testing Compressor Windings
If either winding does not test continuous, replace the compressor.
NOTE: If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor.

SERVICING

S-17B Ground Test If fuse, circuit breaker, ground fault protective device, etc., has tripped, this is a strong indication that an electrical problem exists and must be found and corrected. The circuit protective device rating must be checked, and its maximum rating should coincide with that marked on the equipment nameplate.

WARNING
Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging.
Carefully retest for ground, directly between compressor terminals and ground.

With the terminal protective cover in place, it is acceptable to replace the fuse or reset the circuit breaker ONE TIME ONLY to see if it was just a nuisance opening. If it opens again, DO NOT continue to reset.

5. If ground is indicated, replace the compressor. S-18 Testing crankcase heater (Optional Item) NOTE: Not all compressors use crankcase heaters.

WARNING
Disconnect ALL power before servicing.

The crankcase heater must be energized a minimum of twenty-four (24) hours before the compressor is operated.

Disconnect all power to unit, making sure that all power legs are open. 1. DO NOT remove protective terminal cover.
Disconnect the three leads going to the compressor terminals at the nearest point to the compressor. 2. Identify the leads and using a Megger, Hi-Potential Ground Tester, or other suitable instrument which puts out a voltage between 300 and 1500 volts, check for a ground separately between each of the three leads and ground (such as an unpainted tube on the compressor). Do not use a low voltage output instrument such as a volt-ohmmeter.

Crankcase heaters are used to prevent migration or accumulation of refrigerant in the compressor crankcase during the off cycles and prevents liquid slugging or oil pumping on start up. On some models, the crankcase heater is controlled by a crankcase heater thermostat that is wired in series with the crankcase heater.
A crankcase heater will not prevent compressor damage due to a floodback or over charge condition.
WARNING
Disconnect ALL power before servicing.

HI-POT

1. Disconnect the heater lead in wires. 2. Using an ohmmeter, check heater continuity - should
test continuous. If not, replace.
S-18A Checking Crankcase Heater Thermostat

Compressor Ground Test
3. If a ground is indicated, then carefully remove the compressor terminal protective cover and inspect for loose leads or insulation breaks in the lead wires.
4. If no visual problems indicated, carefully remove the leads at the compressor terminals.

NOTE: Not all models with crankcase heaters will have a crankcase heater thermostat.
1. Install a thermocouple type temperature test lead on the discharge line adjacent to the crankcase heater thermostat.
2. Check the temperature at which the control closes its contacts by lowering the temperature of the control. The crankcase heater thermostat should close at 67°F ± 5°F.

SERVICING

3. Check the temperature at which the control opens its contacts by raising the temperature of the control. The crankcase heater thermostat should open at 85°F ± 5°F.
4. If not as above, replace control.
S-21 Checking Reversing Valve And Solenoid Occasionally the reversing valve may stick in the heating or cooling position or in the mid-position.

6. Using VOM check for voltage across fan terminals DF1 and DF2 on the board. You should read line voltage (208-230 VAC) indicating the relay is open in the defrost mode.
7. Using VOM check for voltage across "W2 & C" terminals on the board. You should read 24 volts.
8. If not as above, replace control board. 9. Set thermostat to off position and disconnect power
before removing any jumpers or wires.

When stuck in the mid-position, part of the discharge gas from the compressor is directed back to the suction side, resulting in excessively high suction pressure. An increase in the suction line temperature through the reversing valve can also be measured. Check operation of the valve by starting the system and switching the operation from COOLING to HEATING cycle.
If the valve fails to change its position, test the voltage (24V) at the valve coil terminals, while the system is on the COOLING cycle.
If no voltage is registered at the coil terminals, check the operation of the thermostat and the continuity of the connecting wiring from the "O" terminal of the thermostat to the unit.

NOTE: Remove jumper across defrost thermostat before returning system to service.
S-25 Testing Defrost Thermostat 1. Install a thermocouple type temperature test lead on
the tube adjacent to the defrost control. Insulate the lead point of contact. 2. Check the temperature at which the control closes its contacts by lowering the temperature of the control. On 3 thru 5 ton units, it should close at 31°F ± 3°F. 3. Check the temperature at which the control opens its contacts by raising the temperature of the control. On 3 thru 5 ton units, it should open at 75°F ± 6°F. 4. If not as above, replace control.
TROUBLESHOOTING

If voltage is registered at the coil, tap the valve body lightly while switching the system from HEATING to COOLING, etc. If this fails to cause the valve to switch positions, remove the coil connector cap and test the continuity of the reversing valve solenoid coil. If the coil does not test continuous - replace it.

THE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED SERVICE AGENCY ONLY: OTHERS SHOULD NOT ATTEMPT TO SERVICE THIS EQUIPMENT.
Common Causes of Unsatisfactory Operation of Heat Pump on the Heating Cycle.

If the coil test continuous and 24 volts is present at the coil terminals, the valve is inoperative - replace it.
S-24 Testing Defrost Control To check the defrost control for proper sequencing, proceed as follows: With power ON; unit not running. 1. Jumper defrost thermostat by placing a jumper wire
across the terminals "DFT" and "R" at defrost control board. 2. Connect jumper across test pins on defrost control board. 3. Set thermostat to call for heating. System should go into defrost within 21 seconds. 4. Immediately remove jumper from test pins. 5. Using VOM check for voltage across terminals "C & O". Meter should read 24 volts.

Inadequate Air Volume Through Indoor Coil When a heat pump is in the heating cycle, the indoor coil is functioning as a condenser. The return air filter must always be clean, and sufficient air volume must pass through the indoor coil to prevent excessive discharge pressure, and high pressure cut out.
Outside Air into Return Duct Do not introduce cold outside air into the return duct of a heat pump installation. For units with 2-speed motors, do not allow air entering the indoor coil to drop below 65° F. Air below this temperature will cause low discharge pressure, thus low suction pressure, and excessive defrost cycling resulting in low heating output. It may also cause false defrosting.

SERVICING

Undercharge An undercharged heat pump on the heating cycle will cause low discharge pressure resulting in low suction pressure and frost accumulation on the outdoor coil.
Poor "Terminating" Sensor contact The unit's defrost terminating sensor must make good thermal contact with the outdoor coil tubing. Poor contact may not terminate the unit's defrost cycle quickly enough to prevent the unit from cutting out on high discharge pressure.
Malfunctioning Reversing Valve - This may be due to: 1. Solenoid not energized - In order to determine if the
solenoid is energized, touch the nut that holds the solenoid cover in place with a screwdriver. If the nut magnetically holds the screwdriver, the solenoid is energized and the unit is in the cooling cycle. 2. No voltage at unit's solenoid - Check unit voltage. If no voltage, check wiring circuit. 3. Valve will not shift: A. Undercharged - check for leaks; B. Valve Body Damaged - Replace valve; C. Unit Properly Charged - If it is on the heating
cycle, raise the discharge pressure by restricting airflow through the indoor coil. If the valve does not shift, tap it lightly on both ends with a screwdriver handle. DO NOT TAP THE VALVE BODY. If the unit is on the cooling cycle, raise the discharge pressure by restricting airflow through the outdoor coil. If the valve does not shift after the above attempts, cut the unit off and wait until the discharge and suction pressure equalize, and repeat above steps. If the valve does not shift, replace it.

1. Remove the wiring from the control terminals. 2. Using an ohmmeter test for continuity across the
normally closed contacts. No reading indicates the control is open - replace if necessary. Make sure the limits are cool before testing. IF FOUND OPEN - REPLACE - DO NOT WIRE AROUND.
S-52 Checking Heater Elements Optional electric heaters may be added, in the quantities shown in the spec sheet for each model unit, to provide electric resistance heating. Under no condition shall more heaters than the quantity shown be installed.
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Disassemble and remove the heating element(s). 2. Visually inspect the heater assembly for any breaks in
the wire or broken insulators. 3. Using an ohmmeter, test the element for continuity -
no reading indicates the element is open. Replace as necessary.
S-100 Refrigeration Repair Practice
DANGER
Always remove the refrigerant charge in a proper manner before applying heat to the system.

S-50 Checking Heater Limit Control(s)
(OPTIONAL ELECTRIC HEATERS) Each individual heater element is protected with an automatic rest limit control connected in series with each element to prevent overheating of components in case of low airflow. This limit control will open its circuit at approximately 150°F. to 160°F and close at approximately 110°F.
WARNING
Disconnect ALL power before servicing.

When repairing the refrigeration system:
WARNING
Disconnect ALL power before servicing.
1. Never open a system that is under vacuum. Air and moisture will be drawn in.
2. Plug or cap all openings. 3. Remove all burrs and clean the brazing surfaces of the
tubing with sand cloth or paper. Brazing materials do not flow well on oxidized or oily surfaces. 4. Clean all tubing by using a dry clean cloth. 5. Insure that the nitrogen is being vented to prevent back pressure which could result in leaks.

SERVICING

6. When brazing, sweep the tubing with dry nitrogen to prevent the formation of oxides on the inside surfaces.
7. Complete any repair by replacing the liquid line drier in the system, evacuate and charge.
BRAZING MATERIALS Copper to Copper Joints - Sil-Fos used without flux (alloy of 15% silver, 80% copper, and 5% phosphorous). Recommended heat 1400°F.
Copper to Steel Joints - Silver Solder used without a flux (alloy of 30% silver, 38% copper, 32% zinc). Recommended heat - 1200°F.
S-101 Leak Testing (nitrogen or nitrogen-traced)
WARNING
To avoid the risk of fire or explosion, never use oxygen, high pressure air or flammable gases for leak testing of a refrigeration system.

S-102 Evacuation
WARNING
REFRIGERANT UNDER PRESSURE! Failure to follow proper procedures may cause property damage, personal injury or death.
This is the most important part of the entire service procedure. The life and efficiency of the equipment is dependent upon the thoroughness exercised by the serviceman when evacuating air (non-condensables) and moisture from the system.
Air in a system causes high condensing temperature and pressure, resulting in increased power input and reduced performance.
Moisture chemically reacts with the refrigerant oil to form corrosive acids. These acids attack motor windings and parts, causing breakdown.

WARNING
To avoid possible explosion, the line from the nitrogen cylinder must include a pressure regulator and a pressure relief valve. The pressure relief valve must be set to open at no more than 150 psig.
Pressure test the system using dry nitrogen and soapy water to locate leaks. If you wish to use a leak detector, charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure, then apply the detector to suspect areas. If leaks are found, repair them. After repair, repeat the pressure test. If no leaks exist, proceed to system evacuation.

The equipment required to thoroughly evacuate the system is a high vacuum pump, capable of producing a vacuum equivalent to 25 microns absolute and a thermocouple vacuum gauge to give a true reading of the vacuum in the system
NOTE: Never use the system compressor as a vacuum pump or run when under a high vacuum. Motor damage could occur.
WARNING
Do not front seat the service valve(s) with the compressor open, with the suction line of the comprssor closed or severely restricted.
1. Connect the vacuum pump, vacuum tight manifold set with high vacuum hoses, thermocouple vacuum gauge and charging cylinder.
2. Start the vacuum pump and open the shut off valve to the high vacuum gauge manifold only. After the compound gauge (low side) has dropped to approximately 29 inches of vacuum, open the valve to the vacuum thermocouple gauge. See that the vacuum pump will blank-off to a maximum of 25 microns. A high vacuum pump can only produce a good vacuum if its oil is non-contaminated.

SERVICING

LOW SIDE GAUGE
AND VALVE

HIGH SIDE GAUGE
AND VALVE

Only use refrigerant certified to AHRI standards. Used refrigerant may cause compressor damage. The manufacturer is not responsible for damage or the need for repairs resulting from the use of unapproved refrigerant typesor used or recycled refrigerant. Most portable machines cannot clean used refrigerant to meet AHRI standards.

Charge the system with the exact amount of refrigerant.

Refer to the specification section or check the unit nameplates for the correct refrigerant charge.

Evacuation
3. If the vacuum pump is working properly, close the valve to the vacuum thermocouple gauge and open the high and low side valves to the high vacuum manifold set. With the valve on the charging cylinder closed, open the manifold valve to the cylinder.
4. Evacuate the system to at least 29 inches gauge before opening valve to thermocouple vacuum gauge.
5. Continue to evacuate to a maximum of 250 microns. Close valve to vacuum pump and watch rate of rise. If vacuum does not rise above 1500 microns in three to five minutes, system can be considered properly evacuated.
6. If thermocouple vacuum gauge continues to rise and levels off at about 5000 microns, moisture and noncondensables are still present. If gauge continues to rise a leak is present. Repair and re-evacuate.
7. Close valve to thermocouple vacuum gauge and vacuum pump. Shut off pump and prepare to charge.
S-103 Charging
WARNING
REFRIGERANT UNDER PRESSURE! * Do not overcharge system with refrigerant. * Do not operate unit in a vacuum or at negative
pressure. Failure to follow proper procedures may cause property damage, personal injury or death.

An inaccurately charged system will cause future problems. 1. Using a quality set of charging scales, weigh the
proper amount of refrigerant for the system. Allow liquid refrigerant only to enter the high side. 2. After the system will take all it will take, close the valve on the high side of the charging manifold. 3. Start the system and charge the balance of the refrigerant through the low side. NOTE: R410A should be drawn out of the storage container or drum in liquid form due to its fractionation properties, but should be "Flashed" to its gas state before entering the system. There are commercially available restriction devices that fit into the system charging hose set to accomplish this. DO NOT charge liquid R410A into the compressor.
4. With the system still running, close the valve on the charging cylinder. At this time, you may still have some liquid refrigerant in the charging cylinder hose and will definitely have liquid in the liquid hose. Reseat the liquid line core. Slowly open the high side manifold valve and transfer the liquid refrigerant from the liquid line hose and charging cylinder hose into the suction service valve port. CAREFUL: Watch so that liquid refrigerant does not enter the compressor.
Final Charge Adjustment The outdoor temperature must be 60°F or higher. Set the room thermostat to COOL, fan switch to AUTO, and set the temperature control well below room temperature.
After system has stabilized per startup instructions, compare the operating pressures to the numbers listed in the spec sheet manual. If pressures and amp draw are too low, add charge. If pressures and amp draw are too high, remove charge. Check subcooling and superheat as detailed in the following section.

SERVICING

NOTE: Check that the air flow is correct before adjusting charge. 5. With the system still running, remove hose and
reinstall both valve caps. 6. Check system for leaks.
Due to their design, Scroll compressors are inherently more tolerant of liquid refrigerant.
NOTE: Even though the compressor section of a Scroll compressor is more tolerant of liquid refrigerant, continued floodback or flooded start conditions may wash oil from the bearing surfaces causing premature bearing failure.
S-104 Checking Compressor Efficiency The reason for compressor inefficiency is broken or damaged suction and/or discharge valves, or scroll flanks on Scroll compressors, reducing the ability of the compressor to pump refrigerant vapor.
The condition of the valves or scroll flanks is checked in the following manner. 1. Attach gauges to the high and low side of the system. 2. Start the system and run a Cooling Performance Test.
If the test shows· Below normal high side pressure. · Above normal low side pressure. · Low temperature difference across coil. · Low amp draw at compressor. -and the charge is correct. The compressor is faulty replace the compressor.
S-104 Checking Compressor Efficiency The reason for compressor inefficiency is broken or damaged scroll flanks on Scroll compressors, reducing the ability of the compressor to pump refrigerant vapor.
During the "OFF" cycle, the high side pressure bleeds to the low side through the fixed orifice restriction device. Check equalization time as follows: 1. Attach a gauge manifold to the suction and liquid line
dill valves. 2. Start the system and allow the pressures to stabilize. 3. Stop the system and check the time it takes for the
high and low pressure gauge readings to equalize.

S-106 Overfeeding Overfeeding by the expansion valve results in high suction pressure, cold suction line, and possible liquid slugging of the compressor.
If these symptoms are observed: 1. Check for an overcharged unit by referring to the
cooling performance charts in the spec sheet manual. 2. Check the operation of the power element in the
valve as explained in S-110 Checking Expansion Valve Operation. 3. Check for restricted or plugged equalizer tube.
S-108 Superheat
NOTE: Check proper air flow before proceeding.
Checking Superheat Refrigerant gas is considered superheated when its temperature is higher than the saturation temperature corresponding to its pressure. The degree of superheat equals the degrees of temperature increase above the saturation temperature at existing pressure. See Temperature - Pressure Chart .
CAUTION
To prevent personal injury, carefully connect and disconnect manifold gauge hoses. Escaping liquid refrigerant can cause burns. Do not vent refrigerant to atmosphere. Recover during system repair or final unit disposal.
1. Run system at least 10 minutes to allow pressure to stabilize.
2. Temporarily install thermometer on suction (large) line near compressor with adequate contact and insulate for best possible reading.
3. Refer to the superheat table provided for proper system superheat. Add charge to lower superheat or recover charge to raise superheat.
Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.

If it takes more than seven (7) minutes to equalize, the restrictor device is inoperative. Replace, install a liquid line drier, evacuate and recharge.

SERVICING

Ambient Condenser Inlet Temp

Return Air Temp. (°F Drybulb)

(°F Drybulb) 100 95 90 85 80 75 70 65 60

---

System Superheat EXAMPLE:
A. Suction Pressure = 143 B. Corresponding Temp. °F. = 50 C. Thermometer on Suction Line = 59°F.

To obtain the degrees temperature of superheat, subtract 50.0 from 59.0°F.

The difference is 9° Superheat. The 9° Superheat would fall in the ± range of allowable superheat.

S-109 Checking Subcooling

NOTE: Check proper air flow before proceeding.

Refrigerant liquid is considered subcooled when its temperature is lower than the saturation temperature corresponding to its pressure. The degree of subcooling equals the degrees of temperature decrease below the saturation temperature at the existing pressure. 1. Attach an accurate thermometer or preferably a
thermocouple type temperature tester to the liquid line close to the pressure switch. 2. Install a high side pressure gauge on the high side (liquid) service valve at the front of the unit. 3. Record the gauge pressure and the temperature of the line. 4. Compare the hi-pressure reading to the "Required Liquid Line Temperature" chart on the preceding page. Find the hi-pressure value on the left column. Follow that line right to the column under the design subcooling value. Where the two intersect is the required liquid line temperature. Alternately you can convert the liquid line pressure gauge reading to temperature by finding the gauge reading in Temperature - Pressure Chart and reading to the left, find the temperature in the °F. Column.

5. The difference between the thermometer reading and pressure to temperature conversion is the amount of subcooling.
Add charge to raise subcooling. Recover charge to lower subcooling.
Subcooling Formula = Sat. Liquid Temp. - Liquid Line Temp.
EXAMPLE: A. Liquid Line Pressure = 417 B. Corresponding Temp. °F. = 120° C. Thermometer on Liquid line = 109°F.
To obtain the amount of subcooling, subtract 109°F from 120°F.
The difference is 11° subcooling. See the specification sheet manual for the design subcooling range for your unit.
See R410A Pressure vs. Temperature chart.
S-110 Checking Expansion Valve Operation 1. Remove the remote bulb of the expansion valve from
the suction line. 2. Start the system and cool the bulb in a container of
ice water, closing the valve. As you cool the bulb, the suction pressure should fall and the suction temperature will rise. 3. Next warm the bulb in your hand. As you warm the bulb, the suction pressure should rise and the suction temperature will fall. 4. If a temperature or pressure change is noticed, the expansion valve is operating. If no change is noticed, the valve is restricted, the power element is faulty, or the equalizer tube is plugged. 5. Capture the charge, replace the valve and drier, evacuate and recharge.

SERVICING

PSIG 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112

°F -37.7 -34.7 -32.0 -29.4 -36.9 -24.5 -22.2 -20.0 -17.9 -15.8 -13.8 -11.9 -10.1
-8.3 -6.5 -4.5 -3.2 -1.6 0.0 1.5 3.0 4.5 5.9 7.3 8.6 10.0 11.3 12.6 13.8 15.1 16.3 17.5 18.7 19.8 21.0 22.1 23.2 24.3 25.4 26.4 27.4 28.5 29.5 30.5 31.2 32.2 33.2 34.1 35.1 35.5 36.9

PSIG 114.0 116.0 118.0 120.0 122.0 124.0 126.0 128.0 130.0 132.0 134.0 136.0 138.0 140.0 142.0 144.0 146.0 148.0 150.0 152.0 154.0 156.0 158.0 160.0 162.0 164.0 166.0 168.0 170.0 172.0 174.0 176.0 178.0 180.0 182.0 184.0 186.0 188.0 190.0 192.0 194.0 196.0 198.0 200.0 202.0 204.0 206.0 208.0 210.0 212.0 214.0

Pressure vs. Temperature Chart

°F 37.8 38.7 39.5 40.5 41.3 42.2 43.0 43.8 44.7 45.5 46.3 47.1 47.9 48.7 49.5 50.3 51.1 51.8 52.5 53.3 54.0 54.8 55.5 56.2 57.0 57.7 58.4 59.0 59.8 60.5 61.1 61.8 62.5 63.1 63.8 64.5 65.1 65.8 66.4 67.0 67.7 68.3 68.9 69.5 70.1 70.7 71.4 72.0 72.6 73.2 73.8

PSIG 216.0 218.0 220.0 222.0 224.0 226.0 228.0 230.0 232.0 234.0 236.0 238.0 240.0 242.0 244.0 246.0 248.0 250.0 252.0 254.0 256.0 258.0 260.0 262.0 264.0 266.0 268.0 270.0 272.0 274.0 276.0 278.0 280.0 282.0 284.0 286.0 288.0 290.0 292.0 294.0 296.0 298.0 300.0 302.0 304.0 306.0 308.0 310.0 312.0 314.0 316.0

R-410A

°F 74.3 74.9 75.5 76.1 76.7 77.2 77.8 78.4 78.9 79.5 80.0 80.6 81.1 81.6 82.2 82.7 83.3 83.8 84.3 84.8 85.4 85.9 86.4 86.9 87.4 87.9 88.4 88.9 89.4 89.9 90.4 90.9 91.4 91.9 92.4 92.8 93.3 93.8 94.3 94.8 95.2 95.7 96.2 96.6 97.1 97.5 98.0 98.4 98.9 99.3 99.7

PSIG 318.0 320.0 322.0 324.0 326.0 328.0 330.0 332.0 334.0 336.0 338.0 340.0 342.0 344.0 346.0 348.0 350.0 352.0 354.0 356.0 358.0 360.0 362.0 364.0 366.0 368.0 370.0 372.0 374.0 376.0 378.0 380.0 382.0 384.0 386.0 388.0 390.0 392.0 394.0 396.0 398.0 400.0 402.0 404.0 406.0 408.0 410.0 412.0 414.0 416.0 418.0

°F 100.2 100.7 101.1 101.6 102.0 102.4 102.9 103.3 103.7 104.2 104.6 105.1 105.4 105.8 106.3 106.6 107.1 107.5 107.9 108.3 108.8 109.2 109.6 110.0 110.4 110.8 111.2 111.6 112.0 112.4 112.6 113.1 113.5 113.9 114.3 114.7 115.0 115.5 115.8 116.2 116.6 117.0 117.3 117.7 118.1 118.5 118.8 119.2 119.6 119.9 120.3

PSIG 420.0 422.0 424.0 426.0 428.0 430.0 432.0 434.0 436.0 438.0 440.0 442.0 444.0 446.0 448.0 450.0 452.0 454.0 456.0 458.0 460.0 462.0 464.0 466.0 468.0 470.0 472.0 474.0 476.0 478.0 480.0 482.0 484.0 486.0 488.0 490.0 492.0 494.0 496.0 498.0 500.0 502.0 504.0 506.0 508.0 510.0 512.0 514.0 516.0 518.0 520.0

°F 120.7 121.0 121.4 121.7 122.1 122.5 122.8 123.2 123.5 123.9 124.2 124.6 124.9 125.3 125.6 126.0 126.3 126.6 127.0 127.3 127.7 128.0 128.3 128.7 129.0 129.3 129.7 130.0 130.3 130.7 131.0 131.3 131.6 132.0 132.3 132.6 132.9 133.3 133.6 133.9 134.0 134.5 134.8 135.2 135.5 135.8 136.1 136.4 136.7 137.0 137.3

*Based on ALLIED SIGNAL Data
62

PSIG 522.0 524.0 526.0 528.0 530.0 532.0 534.0 536.0 538.0 540.0 544.0 548.0 552.0 556.0 560.0 564.0 568.0 572.0 576.0 580.0 584.0 588.0 592.0 596.0 600.0 604.0 608.0 612.0 616.0 620.0 624.0 628.0 632.0 636.0 640.0 644.0 648.0 652.0 656.0 660.0 664.0 668.0 672.0 676.0 680.0 684.0 688.0 692.0 696.0

°F 137.6 137.9 138.3 138.6 138.9 139.2 139.5 139.8 140.1 140.4 141.0 141.6 142.1 142.7 143.3 143.9 144.5 145.0 145.6 146.2 146.7 147.3 147.9 148.4 149.0 149.5 150.1 150.6 151.2 151.7 152.3 152.8 153.4 153.9 154.5 155.0 155.5 156.1 156.6 157.1 157.7 158.2 158.7 159.2 159.8 160.3 160.8 161.3 161.8

SERVICING

SUBCOOLING

REQUIRED LIQUID LINE TEMPERATURE

LIQUID PRESSURE

REQUIRED SUBCOOLING TEMPERATURE (°F)

AT ACCESS FITTING (PSIG)

189

195

202

208

215

222

229

236

243

251

259

266

274

283

291

299

308

317

326

335

345

354

100

364

102

100

374

104

102

100

384

106

104

102

100

395

108

106

104

102

100

406

110

108

106

104

102

100

416

112

110

108

106

104

102

427

114

112

110

108

106

104

439

116

114

112

110

108

106

450

118

116

114

112

110

108

462

120

118

116

114

112

110

474

122

120

118

116

114

112

486

124

122

120

118

116

114

499

126

124

122

120

118

116

511

128

126

124

122

120

118

SERVICING

S-111 Fixed Orifice Restriction Devices The fixed orifice restriction device (flowrator) used in conjunction with the indoor coil is a predetermined bore (I.D.).
It is designed to control the rate of liquid refrigerant flow into an evaporator coil.
The amount of refrigerant that flows through the fixed orifice restriction device is regulated by the pressure difference between the high and low sides of the system.
In the cooling cycle when the outdoor air temperature rises, the high side condensing pressure rises. At the same time, the cooling load on the indoor coil increases, causing the low side pressure to rise, but at a slower rate.
Since the high side pressure rises faster when the temperature increases, more refrigerant flows to the evaporator, increasing the cooling capacity of the system.

Discharge and suction pressures will be low, giving the appearance of an undercharged unit. However, the unit will have normal to high subcooling.
Locate the restriction, replace the restricted part, replace drier, evacuate and recharge.
S-113 Overcharge Of Refrigerant An overcharge of refrigerant is normally indicated by an excessively high head pressure.
An evaporator coil, using an expansion valve metering device, will basically modulate and control a flooded evaporator and prevent liquid refrigerant return to the compressor.
An evaporator coil, using a fixed orifice restrictor device (flowrator) metering device, could allow liquid refrigerant to return to the compressor under extreme overcharge conditions.

When the outdoor temperature falls, the reverse takes place. The condensing pressure falls, and the cooling loads on the indoor coil decreases, causing less refrigerant flow.
If a restriction should become evident, proceed as follows: 1. Recover refrigerant charge. 2. Remove the orifice assembly and clean or replace. 3. Replace liquid line drier, evacuate and recharge.
Checking Equalization Time During the "OFF" cycle, the high side pressure bleeds to the low side through the fixed orifice restriction device.
Check equalization time as follows: 1. Attach a gauge manifold to the suction and liquid line
dill valves 2. Start the system and allow the pressures to stabilize. 3. Stop the system and check the time it takes for the
high and low pressure gauge readings to equalize.
If it takes more than seven (7) minutes to equalize, the restriction device is inoperative. Replace, install a liquid line drier, evacuate and recharge.
S-112 Checking Restricted Liquid Line When the system is operating, the liquid line is warm to the touch. If the liquid line is restricted, a definite temperature drop will be noticed at the point of restriction. In severe cases, frost will form at the restriction and extend down the line in the direction of the flow. 64

Also with a fixed orifice restrictor device (flowrator) metering device, extreme cases of insufficient indoor air can cause icing of the indoor coil and liquid refrigerant return to the compressor, but the head pressure would be lower.
There are other causes for high head pressure which may be found in the "Service Problem Analysis Guide." If other causes check out normal, an overcharge or a system containing non-condensables would be indicated.
If this system is observed: 1. Start the system.
2. Remove and capture small quantities of refrigerant as from the suction line access fitting until the head pressure is reduced to normal.
3. Observe the system while running a cooling performance test. If a shortage of refrigerant is indicated, then the system contains noncondensables.
S-114 Non-Condensables If non-condensables are suspected, shut down the system and allow the pressures to equalize. Wait at least 15 minutes. Compare the pressure to the temperature of the coldest coil since this is where most of the refrigerant will be. If the pressure indicates a higher temperature than that of the coil temperature, non-condensables are present.

SERVICING

Non-condensables are removed from the system by first NOTE: At least twelve (12) inches of the suction line

removing the refrigerant charge, replacing and/or installing immediately out of the compressor stub must be

liquid line drier, evacuating and recharging.

discarded due to burned residue and contaminates.

S-115 Compressor Burnout When a compressor burns out, high temperature develops causing the refrigerant, oil and motor insulation to decompose forming acids and sludge.
If a compressor is suspected of being burned-out, attach a refrigerant hose to the liquid line dill valve and properly remove and dispose of the refrigerant.
NOTICE
Violation of EPA regulations may result in fines or other penalties.
Now determine if a burn out has actually occurred. Confirm by analyzing an oil sample using a Sporlan Acid Test Kit, AK-3 or its equivalent.
Remove the compressor and obtain an oil sample from the suction stub. If the oil is not acidic, either a burnout has not occurred or the burnout is so mild that a complete clean-up is not necessary.
If acid level is unacceptable, the system must be cleaned by using the clean-up drier method.
CAUTION
Do not allow the sludge or oil to contact the skin. Severe burns may result.
NOTE: Daikin does NOT approve the flushing method using R-11 refrigerant.
Suction Line Drier Clean-Up Method The POE oils used with R410A refrigerant is an excellent solvent. In the case of a burnout, the POE oils will remove any burnout residue left in the system. If not captured by the refrigerant filter, they will collect in the compressor or other system components, causing a failure of the replacement compressor and/or spread contaminants throughout the system, damaging additional components.

1. Remove the liquid line drier and expansion valve. 2. Purge all remaining components with dry nitrogen or
carbon dioxide until clean. 3. Install new components including liquid line drier. 4. Braze all joints, leak test, evacuate, and recharge
system. 5. Start up the unit and record the pressure drop across
the drier. 6. Continue to run the system for a minimum of twelve
(12) hours and recheck the pressure drop across the drier. Pressure drop should not exceed 6 PSIG. 7. Continue to run the system for several days, repeatedly checking pressure drop across the suction line drier. If the pressure drop never exceeds the 6 PSIG, the drier has trapped the contaminants. Remove the suction line drier from the system. 8. If the pressure drop becomes greater, then it must be replaced and steps 5 through 9 repeated until it does not exceed 6 PSIG.
NOTICE: Regardless, the cause for burnout must be determined and corrected before the new compressor is started.
S-200 Checking External Static Pressure The minimum and maximum allowable duct static pressure is found in the Spec Sheet Manual.
Too great of an external static pressure will result in insufficient air that can cause icing of the coil, whereas too much air can cause poor humidity control, and condensate to be pulled off the evaporator coil causing condensate leakage. Too much air can cause motor overloading and in many cases this constitutes a poorly designed system. To determine proper air movement, proceed as follows: 1. Using a draft gauge (inclined manometer) measure
the static pressure of the return duct at the inlet of the unit, (Negative Pressure).

The suction line filter drier should be installed as close to the compressor suction fitting as possible. The filter must be accessible and be rechecked for a pressure drop after the system has operated for a time. It may be necessary to use new tubing and form as required.

SERVICING

4. For gas heat units, the airflow must be adjusted so that the air temperature rise falls within the ranges given stated on Data Plate by adjusting the variable pitch sheave on the motor (see Blower Performance section in appropriate Spec Sheet Manual for correct pulley adjustment).
5. Take motor amperage draw to determine that the motor is not overloaded during adjustments.

Total External Static

SUPPLY

RETURN

2. Measure the static pressure of the supply duct,

(Positive Pressure).

3. Add the two readings together.

NOTE: Both readings may be taken simultaneously and

read directly on the manometer if so desired.

RISE = TSUPPLY -T

4. Consult proper table for quantity of air.
If the external static pressure exceeds the minimum or maximum allowable statics, check for closed dampers, dirty filters, undersized or poorly laid out ductwork.
S-201 Checking Temperature Rise Temperature rise is related to the BTUH output of the unit and the amount of air (CFM) circulated over the heat exchanger.
All units are designed for a given range of temperature increase. This is the temperature of the air leaving the unit minus the temperature of the air entering the unit.
The more air (CFM) being delivered through a given unit the less the rise will be; so the less air (CFM) being delivered, the greater the rise. The temperature rise should be adjusted in accordance to a given unit specifications and its external static pressure. 1. Check BTUH input to unit do not exceed input rating
stamped on rating plate. 2. Take entering and leaving air temperatures. 3. Select the proper speed tap or dip switch setting for
direct drive units.

Checking Temperature Rise
S-206 Indoor Fan Rotation Check
Evaporator Fan Rotation Check (Three Phase Models Only) Check that fan rotates counter-clockwise when viewed from the drive side of unit and in accordance with rotation arrow shown on blower housing. If it does not, reverse any two incoming power cables at Single Point Power Block. In this case, repeat bearing check.
Do not attempt to change load side wiring. Internal wiring assures all motors and compressors will rotate in correct direction once evaporator fan motor rotation check has been made.
S-300 Testing Primary Limit Control DRG units use a snap-disk type primary limit device. Sometimes referred to as "stat on a stick". The limit setting is fixed and must not be readjusted in the field.

SERVICING

It is connected in series with the rollout switch wiring to the gas valve. If its temperature should be exceeded, it will open, interrupting the voltage to the gas valve causing it to open.
An additional limit (primary limit) control is required for safety control of high temperature within the furnace or ductwork.

Testing Primary Limit Control

Refer to the specification section to determine the proper limit cutout temperature for the model being serviced.

In all instances the limit control is wired in series with the ignition control.
If the temperature within the furnace should exceed this setting, the control will open, de-energizing the ignition control which in turn will open the electrical circuit to the gas valve.
The control will automatically reset when the temperature within the combustion chamber is sufficiently lowered.

AUXILIARY LIMIT SWITCH
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Remove electrical power to unit. Some units may have more than one source of power.
2. Remove the wires from the limit control terminals. 3. Using an ohmmeter, test for continuity across the two
terminals. 4. If limit test open allow unit to cool and retest. 5. If still open, replace the control.

1. Remove the wires from the auxiliary limit control terminals.
2. Using an ohmmeter, test for continuity across the two terminals. No reading indicates the control is open. Push the red reset button, test again - if still open, replace the control.
3. If limit tests open, allow unit to cool and retest. 4. If still open, replace the control.

S-301 Testing Auxiliary Limit The auxiliary limit control is a preset nonadjustable control mounted in the blower compartment area.

SERVICING

Limit Switch Operation (Applies to Primary, Auxiliary, and Roll Out Limits) DSI systems. If a limit switch opens, the indoor blower is energized on heat speed and the induced draft blower is energized. The LED on the control flashes "4" to indicate an open limit switch. The blower and inducer remain on while the limit switch is open. The gas valve is de-energized. Power to the thermostat "R" is removed while the limit switch is open.

Testing Auxiliary Limit Control
S-302 Checking Flame Rollout Switch DRG units are equipped with a temperature-activated manual reset control. This control is mounted to the manifold assembly and is wired in series with the auxiliary limit and gas valve. The control is designed to open should a flame roll out occur. An over firing condition or flame impingement on the heat shield can also cause the control to open.
If the rollout control has opened, the circuit between the ignition control and gas valve will be interrupted and the ignition control module will go into lockout. The servicer should reset the ignition control by opening and closing the thermostat circuit. The servicer should look for the ignitor glowing which indicates there is power to the ignition control. The servicer should measure the voltage between each side of the rollout control and ground while the ignition control is try to power the gas valve.

When the limit switch re-closes, the induced draft motor runs through its post purge and the indoor blower goes through the heat off delay.
If a call for heat exists when the limit switch re-closes, the control goes through a pre-purge period and then makes an ignition attempt. The indoor blower remains on (for the delay off time) during the re-ignition attempt. 1. If no voltage is measured on either side of control it
indicates ignition control or wiring to control problem. 2. If voltage is measured on one side of the control and
not the other, it indicates the control is open. 3. If voltage is measured on both sides of the control the
wiring to gas valve or valve is at fault.
Servicing procedure with furnace not firing. 1. Confirm that the outer door was in place and all
screws tightened. (No leaks under the door.) 2. Check to see if any damage was done to the furnace
especially the wiring. 3. Confirm that heat exchanger is not obstructed by
feeling for discharge air from the flue hood when the combustion blower is running but the unit is not firing.

If the above steps do not suggest the reason the control has tripped the furnace should be fired. 1. Remove the heating compartment door. 2. Turn of the power or open the thermostat circuit. 3. Reset the rollout control. 4. Turn power on and put the unit into a call for heating.

CAUTION
Flame rollout could occur. Keep face and hands a safe distance from burner area.

Checking Flame Rollout Switch

SERVICING

5. Look under the heat shield as the unit is running. Flames should be drawn into firing tubes. A. If only one burners flame is not drawn into the tube, that tube is restricted. B. If, without the air circulation blower running, all flames are not drawn into the tubes either the collector box, combustion blower, or flue outlet is obstructed. If the combustion blower or flue outlet is obstructed, the pressure switch should have opened preventing the unit from firing, also inspect the unit pressure switch and wiring. C. If the burner flame is not drawn into the tube only when the air circulation blower is running, then a cracked heat exchanger tube is present.
S-303 Testing Inducer Motor

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Ensure gas valve and main gas supply are on. 2. Using a voltmeter, check from C and M on gas valve
for 24 volts to gas valve. 3. If 24 volts are present and no gas flows through the
valve, replace valve.

Open to Atmosphere

Manometer Hose

Outlet Pressure Boss

High Fire Regulator

Adjust

Regulator

Vent

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Disconnect the motor wire leads from its connection point at integrated ignition control module.
2. Using and ohmmeter, test for continuity between each of the motor leads.
3. Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead.
If the windings do not test continuous or a reading is obtained to ground, replace the motor. 4. After completing check and/or replacement of
induced draft blower motor. 5. Turn on electrical power and verify proper unit
operation. S-304 Testing Gas Valve
Direct Spark Ignition (DSI) Systems TWO STAGE MODELS ONLY: A two-stage combination redundant operator type gas valve which provides all manual and automatic control functions required for gas fired heating equipment is used.

Inlet Pressure Boss Manometer

Low Fire Regulator Adjust

36G54 For use with all 3-5 ton models
PRESSURE ADJUSTMENTS
S-305 Checking Main Burners The main burners are used to provide complete combustion of various fuels in a limited space, and transfer this heat of the burning process to the heat exchanger.
Proper ignition, combustion, and extinction are primarily due to burner design, orifice sizing, gas pressure, primary and secondary air, vent and proper seating of burners.

The valve provides control of main burner gas flow, pressure regulation, and 100 percent safety shut-off.

Beckett Burner

SERVICING

WARNING
Disconnect gas and electrical power supply.
In checking main burners, look for signs of rust, oversized and undersized carry-over ports restricted with foreign material, etc.
S-306 Checking Orifices A predetermined fixed gas orifice is used in all of these furnaces. That is an orifice which has a fixed bore and position.
A

GAS STREAM

Orifices should be treated with care in order to prevent damage. They should be removed and installed with a boxend wrench in order to prevent distortion. In no instance should an orifice be peened over and redrilled. This will change the angle or deflection of the vacuum effect or entraining of primary air, which will make it difficult to adjust the flame properly. This same problem can occur if an orifice spud of a different length is substituted.
WARNING
Disconnect gas and electrical power supply.
1. Check orifice visually for distortion and/or burrs. 2. Check orifice size with orifice sizing drills. 3. If resizing is required, a new orifice of the same
physical size and angle with proper drill size opening should be installed.
S-307 Checking Gas Pressure Gas inlet and manifold pressures should be checked and adjusted in accordance to the type of fuel being consumed.

DENT OR BURR
GAS STREAM B
The length of Dimension "A" determines the angle of Gas Stream Defraction, "B".
A dent or burr will cause severe deflection of gas stream.
No resizing should be attempted until all factors are taken into consideration such as inlet manifold gas pressure, alignment, and positioning, specific gravity and BTU content of the gas being consumed.
The only time resizing is required is when a reduction in firing rate is required for an increase in altitude.

WARNING
Disconnect gas and electrical power supply.

1. Connect a water manometer or adequate gauge to the inlet pressure fitting of the gas valve.
2. Remove the pressure tap fitting at the manifold if provided or check at the gas valve outlet fitting and
AtOmpoesnpchtooenrenectMaannHooomtsheeteerr manometer or gauge.

Outlet Pressure Boss

High Fire Regulator

Adjust

Regulator

Vent

Inlet Pressure Boss Manometer

Low Fire Regulator Adjust

Single Stage 36G54

SERVICING

Measuring Inlet And Manifold Gas Pressure

OUTLET (MANIFOLD) PRESSURE MANOMETER (FIELD SUPPLIED)

INLET (SUPPLY) PRESSURE MANOMETER (FIELD SUPPLIED)

NOTE! MANIFOLD PRESSURE IS TO BE BETWEEN
3.2 & 3.7 NATURAL AND 10.0 & 11.0 INCHES L.P. HIGH FIRE OR SINGLE STAGE AND
BETWEEN 1.7 AND 2.3 INCHES NATURAL 7.0 & 8.0 INCHES
LOW STAGE

NOTE! SUPPLY PRESSURE IS TO BE BETWEEN 5.0 & 7.0 INCHES NATURAL
AND 11.0 & 14.0 INCHES L.P. WITH THE FURNACE
OPERATING.

Two-Stage H Valve Measuring Inlet And Manifold Gas Pressure
With Power ON:
WARNING
Line Voltage now present.

3. Put unit into heating cycle and turn on all other gas consuming appliances.

SINGLE STAGE MODELS

For NATURAL GAS:

A. Inlet pressure should be a nominal 7" w.c.

B. Manifold pressure for 2 stage heat models on low

stage should be

2.0" w.c. ± .3"w.c.

C. Manifold pressure for single stage heat models and

2 stage heat models on high stage should be 3.5"

± .3"w.c.

For PROPANE GAS:

A. Inlet pressure should be a nominal 11" w.c.

B. Manifold pressure for 2 stage heating models on

low stage should be 6" w.c.

C. Manifold pressure for single stage heat models and

2 stage heat models on high stage should be 10"

w.c.

Natural Propane

MANIFOLD GAS PRESSURE

2 Stage Heat Models

Gas

Range

Nominal

Low Stage High Stage

1.6 - 2.2" w.c. 2.0" w.c. 3.2 - 3.8" w.c. 3.5" w.c.

Low Stage High Stage

5.7 - 6.3" w.c. 6.0" w.c. 9.7 - 10.3" w.c. 10.0" w.c.

If operating pressures differ from chart, make necessary pressure regulator adjustments, check piping size, etc., and/or consult with local utility.
S-308 Checking For Delayed Ignition Delayed ignition is a delay in lighting a combustible mixture of gas and air which has accumulated in the combustion chamber.
When the mixture does ignite, it may explode and/or rollout causing burning in the burner venturi.
If delayed ignition should occur, the following should be checked: 1. Improper gas pressure - adjust to proper pressure.
(See S-307) 2. Improper burner positioning - burners should be in
locating slots, level front to rear and left to right. 3. Carry over (lighter tube or cross lighter) obstructed -
clean. 4. Main burner orifice(s) deformed, or out of alignment
to burner - replace.
S-309 Checking For Flashback Flashback will also cause burning in the burner venturi, but is caused by the burning speed being greater than the gasair flow velocity coming from a burner port.
Flashback may occur at the moment of ignition, after a burner heats up or when the burner turns off. The latter is known as extinction pop.
Since the end results of flashback and delayed ignition can be the same (burning in the burner venturi) a definite attempt should be made to determine which has occurred. If flashback should occur, check for the following: 1. Improper gas pressure - adjust to proper pressure.
See S-307. 2. Check burner for proper alignment and/or replace
burner. 3. Improper orifice size - check orifice for obstruction.
S-310 Checking Pressure Control A pressure control device is used to measure negative pressure at the induced draft blower motor inlet to detect a partial or blocked flue.

Single Stage Heat Models

Gas

Range

Nominal

Natural Single Stage 3.2 - 3.8" w.c. 3.5" w.c.

SERVICING

Pressure Switch Operation (DSI Direct Spark System) The pressure switch is ignored unless there is a call for heat. When the control receives a call for heat, the control checks to see that the pressure switch is open. If the control sees that the pressure switch is closed before the induced draft blower is energized, the LED will flash a code of "2" (to indicate the pressure switch is stuck closed) and the inducer will remain off until the pressure switch opens.
If the pressure switch opens before the ignition period, the induced draft blower will remain on and the control will stay in pre-purge until the pressure switch is closed for an entire 15 second pre-purge period. The LED will flash a code of "3" to indicate open pressure switch.
If the pressure switch opens after the gas valve has been energized, the control will de-energize the gas valve and run the indoor blower through the heat off delay. The inducer stays on until the pressure switch re-closes. Then the control makes another ignition attempt.

With Power ON:
WARNING
Line Voltage now present.
4. Energize furnace for heating cycle. The induced draft blower motor will begin to run. The inclined manometer should read approximately -1.2" ± 0.3" W.C with no combustion.
5. Remove and check the two electrical wires and using the VOM check from Common to NO (Normally Open), it should read closed (with I.D. motor running). If not as above, replace pressure control.
6. Reconnect all wires to the control and place in heating cycle.
7. As the unit fires on high stage, the inclined manometer negative pressure will drop to -0.9" ± 0.3" W.C.
8. If not as listed, replace control.

HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.

1. Remove wires from the electrical terminals.

2. Using a VOM check from Common to NO (Normally Open) - should read open.

If switch reads as noted proceed to Step 3, otherwise

replace control.

3. Remove the pressure control hose from the control

and interconnect with an inclined manometer as

shown:

HOSE TO J-TUBE

1/4" COPPER TEE

PRESSURE SWITCH

INCLINED MANOMETER
Reconnect wires to the Common and NO terminals.

NOTE: the pressure switch must be mounted with the diaphragm in a vertical position.
S-311 High Altitude Application
IMPORTANT NOTE: The gas/electric units naturally derate with altitude. Do not attempt to increase the firing rate by changing orifices or increasing the manifold pressure. This can cause poor combustion and equipment failure. At all altitudes, the manifold pressure must be within 0.3 inches W.C. of that listed on the nameplate for the fuel used. At all altitudes and with either fuel, the air temperature rise must be within the range listed on the unit nameplate. Refer to the Installation Manual provided with the LP kit for conversion from natural gas to propane gas and for altitude adjustments.
When this package unit is installed at high altitude, the appropriate High Altitude orifice kit may be installed. As altitude increases, there is a natural reduction in the density of both the gas fuel and combustion air. This kit will provide the proper design certified input rate within the specified altitude range. High altitude kits are not approved for use in Canada. For installations above 2,000 feet, use kit HAKT036150. The HAKT036150 kit is used for both Natural and LP gas at high altitudes.
For propane conversions at altitudes below 2,000 feet, use LPHE-036072 propane conversion kit.

SERVICING

For propane conversion above 2,000 feet, high altitude kit HAKT036150 is required in addition to propane conversion kit LPHE-036072.

INPUT/BURNER

HIGH ALTITUDE KIT

2000

20,000 BTUH NAT/20,000 BTUH/L.P. ELEVATION ABOVE SEA-LEVEL (FEET) 3000 4000 4500 5000 6000 7000

8000

U.S. BURNER ORIFICE

45/55 47/55 47/56 - 47/56 48/57 48/58 49/58

HAKT036150

CANADA BURNER ORIFICE

45/55 -

- 48/57 -

INPUT/BURNER

HIGH ALTITUDE KIT

2000

22,500 BTUH NAT/20,000 BTUH/L.P. ELEVATION ABOVE SEA-LEVEL (FEET) 3000 4000 4500 5000 6000 7000

8000

U.S. BURNER ORIFICE

44/55 44/55 45/56 - 45/56 46/57 47/58 47/58

HAKT036150

CANADA BURNER ORIFICE

44/55 -

- 47/57 -

INPUT/BURNER

HIGH ALTITUDE KIT

2000

25,000 BTUH NAT/20,000 BTUH/L.P. ELEVATION ABOVE SEA-LEVEL (FEET) 3000 4000 4500 5000 6000 7000

8000

U.S. BURNER ORIFICE

HAKT036150 43/55 43/55 44/56 - 44/56 44/56 45/57 45/57

CANADA BURNER ORIFICE

43/55 -

- 46/57 -

Diagnostic LED

L2 L2 L2 L2

COOL HEAT

UNUS ED

12 11 10

Blower Off Delay Settings speed up

Transformer
DSI Control Board

S-313 Testing Ignition Control Module
NOTE: Failure to earth ground the unit, reversing the neutral and hot wire connection to the line (polarity), or a high resistance connection in the ground or neutral lines may cause the control to lockout due to failure to detect flame.

3. The control energizes the spark igniter and gas valve for 7 seconds. If flame is established, the control goes into a 30 second heat on delay.
4. The indoor blower is energized at the heat speed after a 30 second on delay.
5. The control monitors the safety circuit inputs, flame, and thermostat during operation.
6. When the thermostat is satisfied, the gas valve is de-energized and the induced draft blower remains on for a 29 second post purge. The indoor blower remains on for the selected heat blower off delay (90, 120, or 150 seconds). Indoor blower off timing begins when thermostat call for heat ends.

The ground wire must run from the unit all the way back to the electrical panel. Proper grounding can be confirmed by disconnecting the electrical power and measuring resistance between the neutral (white) connection and the burner closest to the flame sensor. Resistance should be less than 10 ohms.
DSI Direct Spark Ignition Systems Normal Sequence Of Operation (Dsi Direct Spark Ignition System) 1. Thermostat calls for heat by energizing "W". The
control checks the pressure switch for open condition. If the pressure switch is closed the control will flash code "3" and wait for the pressure switch to open. 2. The induced draft motor is energized and the control flashes code "2" and waits for the pressure switch to close. Once the pressure switch is closed, the LED stops flashing and the control begins timing the 15 second pre-purge.

Testing Direct Spark Ignition (DSI) systems Thermostat calling for heat (15 second prepurge time and 7 second trial for ignition). 1. Check for 230 VAC from L1 terminal of control
module to L2. No voltage - check wire connections, continuity, etc. 2. Check for 24 VAC at "R" to "C" thermostat terminals. A. No voltage - check 3 amp automotive type fuse
on control board. A blown fuse would indicate a short in the 24 VAC circuit (thermostat or limit circuit). B. Voltage Present - check limit, auxiliary limit and rollout (S-300, S-301 and S-302). If limit, auxiliary limit and rollout are closed, then check for 24 VAC at the gas valve terminals.
No 24 VAC at gas valve - replace Control board.

SERVICING

TROUBLESHOOTING
Ignition Control Error Codes The following presents probable causes of questionable unit operation. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.
Remove the control box access panel and note the number of diagnostic LED flashes. Refer to Diagnostic Indicator Chart for an interpretation of the signal and to this section for an explanation.
Internal Control Failure If the integrated ignition control in this unit encounters an internal fault, it will go into a "hard" lockout and turn off the diagnostic LED. If diagnostic LED indicates an internal fault, check power supply to unit for proper voltage, check all fuses, circuit breakers and wiring. Disconnect electric power for five seconds. If LED remains off after restoring power, replace control.
Abnormal Operation - Heating Codes External Lockout (1 FLASH CODE) An external lockout occurs if the integrated ignition control determines that a measurable combustion cannot be established within three (3) consecutive ignition attempts. If flame is not established within the seven (7) second trial for ignition, the gas valve is deenergized, 15 second interpurge cycle is completed, and ignition is reattempted. The control will repeat this routine three times if a measurable combustion is not established. The control will then shut off the induced draft blower and go into a lockout state.

· Check secondary limit A dirty filter, excessive duct static, insufficient air flow, a faulty limit, or a failed circulator blower can cause this limit to open. Check filters, total external duct static, circulator blower motor, blower motor speed tap (see wiring diagram), and limit. An interruption in electrical power during a heating cycle may also cause the auxiliary limit to open. The automatic reset secondary limit is located on top of the circulator blower assembly.
· Check rollout limit If the burner flames are not properly drawn into the heat exchanger, the flame rollout protection device will open. Possible causes are restricted or blocked flue passages, blocked or cracked heat exchanger, a failed induced draft blower, or insufficient combustion air. The rollout protection device is a manual reset limit located on the burner bracket. The cause of the flame rollout must be determined and corrected before resetting the limit.
· Check flame sensor A drop in flame signal can be caused by nearly invisible coating on the sensor. Remove the sensor and carefully clean with steel wool.
· Check wiring Check wiring for opens/shorts and miswiring.
IMPORTANT: If you have to frequently reset your gas/
electric package unit, it means that a problem exists that
should be corrected. Contact a qualified servicer for
further information.
Pressure Switch Stuck Open (2 FLASH CODE)
A pressure switch stuck open can be caused by a faulty
pressure switch, loose or broken wires can be interpreted
as a open switch, check all wiring, a disconnected or
damaged hose, a blocked or restricted flue, or a faulty
induced draft blower. If the control senses an open
pressure switch during the pre-purge cycle, the induced
draft blower only will be energized.

If flame is established but lost, the control will energize the circulator blower at the heat speed and then begin a new ignition sequence. If flame is established then lost on subsequent attempts, the control will recycle for four (4) consecutive ignition attempts (five attempts total) before locking out.
The diagnostic fault code is 1 flash for a lockout due to failed ignition attempts or flame dropouts. The integrated control will automatically reset after one hour, or it can be reset by removing the thermostat signal or disconnecting the electrical power supply for over five seconds. If the diagnostic LED indicates an external lockout, perform the following checks: · Check the supply and manifold pressures · Check the gas orifices for debris · Check gas valve for proper operation

If the pressure switch opens after ignition has begun the gas valve is deenergized, the circulator blower heat off cycle begins, and the induced draft blower remains on. The diagnostic fault code is two flashes.
Pressure Switch Stuck Closed (3 FLASH CODE) A stuck closed pressure switch can be caused by a faulty pressure switch or shorted wires can be interpreted as a closed switch, check all wiring. If the control encounters a pressure switch stuck closed, the induced draft blower remains off. The diagnostic LED code for this fault is three (3) flashes.

SERVICING

Open Thermal Protection Device (4 FLASH CODE) If the primary limit switch opens, the gas valve is immediately deenergized, the induced draft and air circulating blowers are energized. The induced draft and air circulator blowers remain energized until the limit switch recloses. The diagnostic fault code for an open limit is four (4) flashes.
A primary limit will open due to excessive supply air temperatures. This can be caused by a dirty filter, excessive duct static, insufficient air flow, or a faulty limit. Check filters, total external duct static, blower motor, blower motor speed tap (see wiring diagram), and limit. Check for loose or missing wires on the limits. This limit will automatically reset once the temperature falls below a preset level.

DSI Direct Spark Ignition Systems
HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
1. Disconnect the flame sensor wire from terminal FS of the ignition control module.

Flame Detected with Gas Valve Closed (5 FLASH CODE) If flame is detected with the gas valve deenergized, the combustion and air circulator blowers are energized. The diagnostic fault code is five (5) flashes for this condition. The control can be reset by removing the power supply to the unit or it will automatically reset after one hour. Miswiring is the probable cause for this fault.

Abnormal Operation - Cooling Codes

Short Cycle Compressor Delay (6 FLASH CODE) The automatic ignition control has a built-in feature that prevents damage to the compressor in short cycling situations. In the event of intermittent power losses or intermittent thermostat operation, the ignition control will delay output to the compressor contactor for three minutes from the time power is restored. (Compressor is off a total of three minutes). The diagnostic LED will flash six (6) times to indicate the compressor contactor output is being delayed.
NOTE: Some electronic thermostats also have a built-in compressor short cycle timer that may be longer than the three minute delay given above. If you are using an electronic thermostat and the compressor has not started after three minutes, wait an additional five minutes to allow the thermostat to complete its short cycle delay time.
S-314 Checking Flame Sensor A flame sensing device is used in conjunction with the ignition control module to prove combustion. If a microamp signal is not present the control will de-energize the gas valve and "retry" for ignition or lockout.

Flame Sensor
2. Connect a microamp meter in series with this wire and terminal FS.
3. Be sure the negative side of the meter is to the wire and the positive of the meter is to terminal FS.
4. Turn on Power.
WARNING
Line Voltage now present.
5. With Power ON, Place the unit into a heating cycle. 6. As soon as flame is established a microamp reading
should be evident once proof of flame (microamp reading) is established, the direct spark ignitor will be de-energized. 7. The microamp reading should be 4 - 6 microamps. 8. If the microamp current is less than 0.5 microamp the control will lockout and flash a code of 1 flash after attempting to reestablish flame sense.

SERVICING
9. If the microamp reading is less than the minimum specified, check for high resistance wiring connections, the distance (3/16") between the sensor and burner, flame sensor connections, dirty flame sensor or poor grounding.
10. If no reading, check for continuity on all components and if good - replace ignition control module.
NOTE: Contaminated fuel or combustion air can create a nearly invisible coating on the flame sensor. This coating works as an insulator causing a loss in the flame sense signal. If this situation occurs the flame sensor must be cleaned with steel wool. Do not use sand paper, the silicone in sand paper will further contaminate the sensor.
76

UNIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 77

DRC036-060, 1PH

UNIT WIRING DIAGRAMS

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 78

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

DRH036-060, 1PH

UNIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 79

DRC036-072, 3PH

UNIT WIRING DIAGRAMS

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 80

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

DRH036-072, 3PH

UNIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 81

DRC036-072, 3PH (HI STATIC)

UNIT WIRING DIAGRAMS

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 82

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

DRH036-072, 3PH HI STATIC

UNIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 83

DRG036-060, 1PH

UNIT WIRING DIAGRAMS

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 84

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

DRG036-072, 3PH

UNIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 85

DRG036-072, 3PH HI STATIC

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 86

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

24VAC/DC

HONEYWELL ACTUATOR

COM 1

CONNECT TO C7250 OUTDOOR AIR SENSOR

CONNECT TO C7400S 1000 OUTDOOR ENTHALPY SENSOR (OPTIONAL) NOTE 1
CONNECT TO C7400S 1000 RETURN AIR ENTHALPY SENSOR (OPTIONAL)
GY
CONNECT TO CO2 SENSOR BL
(OPTIONAL) RD

(ALTERNATE (NOTE 2)

TERMINAL BLOCK

(ALTERNATE (NOTE 2)

COOL 1

FAN

ALARM

REV VALVE

COOL 2

CONNECT TO C7250A MIXED AIR SENSOR (IN BLOWER SECTION)

BK BK
WH WH BR YL PU BR YL PU GY BL RD
BL RD

MAT MAT OAT OAT S-BUS S-BUS IAQ 2-10 IAQ COM IAQ 24V+ ACT 2-10 ACT COM ACT 24V+

HONEYWELL W7220

TERM 251
PK
GR
YL PU YL BL GY OR WH

PIN #1 TERMINAL IDENTIFIER

RV - REVERSING VALVE (ENERGIZED IN COOLING MODE)

TERM 272

TERM 273

TYCO PART # 172165-1

PIN #1 TERMINAL IDENTIFIER

AUX2-1

OCC

E-GND

EXH1

AUX1-0

Y2-I

Y2-O

Y1-I

Y1-O

TERM 250
PK GR PU YL PU YL BL GY OR BK BK
TYCO PART # 1-480708-0

NOTES:
1. OUTDOOR ENTHALPY SENSOR REPLACES DRY BULB OUTDOOR AIR SENSOR (SAME MOUNTING LOCATION). UNPLUG DRY BULB SENSOR FROM OAT. PLUG IN OUTDOOR ENTHALPY SENSOR INTO LABELED HARNESSES AT S-BUS.
2. "W1" FOR A/C AND GAS UNITS, "O" FOR HEAT PUMP UNITS ONLY

BOOKLET NO.

DESCRIPTION

PAGE

DKWDB0001B

ECONOMIZER-JADE

12 OF 32

GROUNDING

POWERED EXHAUST

1
BL

PIN #1 TERMINAL IDENTIFIER

ECONOMIZER

ACCESSORIES WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

LINE NEUTRAL LINE HOT

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 87

LINE VOLTAGE
208-230V/1PH/3PH/60Hz

GND

GFCI 3

RD
OR 240V

NOTES:
1. PRIMARY 240V, 8.33A SECONDARY 120V, 16.7A 2kVA/1PH/60 HERTZ
2. 10A CLASS CC, 600VAC/DC, 200kA SCCR 3. RATING: 120V / 60 Hz / 15A.
PRODUCT CLASS A, NEMA TYPE 5-15R GROUNDING DUPLEX RECEPTACLE FOR USE WITH 10-14 AWG WIRE. 4. POWER BLOCK MAY NOT BE AVAILABLE ON SOME GAS MODELS. CONVENIENCE OUTLET POWER CAN BE SUPPLIED BY CONNECTING BLACK AND RED WIRES TO THE LINE SIDE OF ANY MOTOR CONTACTOR.

BOOKLET NO.

DESCRIPTION

DKWDB0001B

CONVENIENCE OUTLET-POWERED 208-230V

120V WH
WH BK
PAGE 5 OF 32

POWERED CONV. OUTLET

ACCESSORIES WIRING DIAGRAMS

LINE NEUTRAL LINE HOT

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 88

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

LINE VOLTAGE
460V/3PH/60Hz

GND

RD
OR 480V

1 H1

GR WH

GFCI 3

NOTES:
1. PRIMARY 480V, 4.17A SECONDARY 120V, 16.7A 2kVA/1PH/60 HERTZ OUTPUT: 13.04A @ 115V.
2. 5A CLASS CC, 600VAC/DC, 200kA SCCR 3. RATING: 120V / 60 Hz / 15A.
PRODUCT CLASS A, NEMA TYPE 5-15R GROUNDING DUPLEX RECEPTACLE FOR USE WITH 10-14 AWG WIRE. 4. POWER BLOCK MAY NOT BE AVAILABLE ON SOME GAS MODELS. CONVENIENCE OUTLET POWER CAN BE SUPPLIED BY CONNECTING BLACK AND RED WIRES TO THE LINE SIDE OF ANY MOTOR CONTACTOR.

BOOKLET NO.

DESCRIPTION

DKWDB0001B

CONVENIENCE OUTLET-POWERED 460V

120V WH
WH BK
PAGE 6 OF 32

POWERED CONV. OUTLET

ACCESSORIES WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

LINE NEUTRAL LINE HOT

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 89

LINE VOLTAGE
575V/3PH/60Hz

GND

RD OR
600V

GFCI 3

NOTES:
1. PRIMARY 600V, 3.33A SECONDARY 120V, 16.7A 2kVA/1PH/60 HERTZ
2. 5A CLASS CC, 600VAC/DC, 200kA SCCR 3. RATING: 120V / 60 Hz / 15A.
PRODUCT CLASS A, NEMA TYPE 5-15R GROUNDING DUPLEX RECEPTACLE FOR USE WITH 10-14 AWG WIRE. 4. POWER BLOCK MAY NOT BE AVAILABLE ON SOME GAS MODELS. CONVENIENCE OUTLET POWER CAN BE SUPPLIED BY CONNECTING BLACK AND RED WIRES TO THE LINE SIDE OF ANY MOTOR CONTACTOR.

BOOKLET NO.

DESCRIPTION

DKWDB0001B

CONVENIENCE OUTLET-POWERED 575V

120V WH
WH BK
PAGE 7 OF 32

POWERED CONV. OUTLET

ACCESSORIES WIRING DIAGRAMS
power exhaust 3 - 5 Ton
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 90

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

MAT MAT OAT OAT S-BUS S-BUS IAQ 2-10 IAQ COM IAQ 24V+ ACT 2-10 ACT COM ACT 24V+

HONEYWELL W7220

AUX2-1

OCC

E-GND

EXH1

AUX1-0

Y2-I

Y2-O

Y1-I Y1-O

FAN MOTOR 1

POWERED EXHAUST CONTROL HARNESS
BR

BL RD
TN

1 BL

1 GY

PIN #1 TERMINAL IDENTIFIER

TO POWER BLOCK OR OTHER POWER SOURCE

POWERED EXHAUST POWER HARNESS
GR
RD 1
BK

GR
RD 1
BK

GRD

BOOKLET NO. DKWDB0001B

DESCRIPTION POWER EXHAUST PROPELLER, NON-DDC, 1PH / 3PH (230V)

PAGE 29 OF 32

ACCESSORIES WIRING DIAGRAMS
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 91

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

MAT MAT OAT OAT S-BUS S-BUS IAQ 2-10 IAQ COM IAQ 24V+ ACT 2-10 ACT COM ACT 24V+

HONEYWELL W7220

AUX2-1

OCC

E-GND

EXH1

AUX1-0

Y2-I Y2-O

Y1-I Y1-O

BL BR

FAN MOTOR 1

POWERED EXHAUST CONTROL HARNESS
BR
1
BL

WH RD BK

TN
1
GY

PIN #1 TERMINAL IDENTIFIER

TO POWER BLOCK OR OTHER POWER SOURCE

POWERED EXHAUST POWER HARNESS
GR
OR
RD
1
BK

GR
WH
RD
1
BK

GRD

BOOKLET NO. DKWDB0001B

DESCRIPTION POWER EXHAUST PROPELLER, NON-DDC, 3PH (460V)

PAGE 30 OF 32

ACCESSORIES WIRING DIAGRAMS

PACKAGE SYSTEM WIRING DIAGRAM - 1 STAGE ELECTRIC HEAT

SEE NOTE 1 #18 GAUGE 7 WIRE
REQUIRED FOR HEAT PUMPS

TYPICAL HP ROOM THERMOSTAT
Y O C W1 G R E

PACKAGE UNIT LOW VOLTAGE
JUNCTION BOX

BL 21
OUTDOOR THERMOSTAT CLOSE ON TEMPERATURE FALL

RED

YELLOW

GREEN

O ORANGE

WHITE

BLUE

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

PACKAGE SYSTEM WIRING DIAGRAM - 2 STAGE ELECTRIC HEAT ABOVE 10 KW

SEE NOTE 1 #18 GAUGE 8 WIRE FOR HEAT PUMPS

TYPICAL HP ROOM THERMOSTAT
W2 Y O C W1 G R E

PACKAGE UNIT LOW VOLTAGE
JUNCTION BOX

SEE NOTE 2

R Y G O
BR W
R

RED

Y YELLOW

G GREEN

O ORANGE

W WHITE

BR BROWN

21
OUTDOOR THERMOSTAT CLOSE ON TEMPERATURE FALL

BL BLUE

NOTES:
1) "O" and "E" used on heat pumps only. 2) Connect wire from terminal #1 on outdoor thermostat to the white
wire on package units if single stage indoor thermostat is used.

Color Codes R - Red
Y - Yellow BL - Blue
BR - Brown
O - Orange
W - White G - Green

OT18-60A Outdoor Thermostat

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 92

ACCESSORIES WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

PACKAGE SYSTEM WIRING DIAGRAM - HEAT PUMPS ONLY! TWO-STAGE ELECTRIC HEAT ABOVE 10 kW

TYPICAL H/P ROOM THERMOSTAT

#18 GAUGE 8 WIRE

W2 Y O C W1 G R E

PACKAGE HEAT PUMP

OUTDOOR THERMOSTAT #2 (IF USED, SEE NOTE 1)
R BL
21
Y 3 BL
21
OUTDOOR THERMOSTAT #1 CLOSE ON TEMPERATURE FALL

R Y G O BR W
BL

RED

Y YELLOW

G GREEN

O ORANGE

W WHITE

BR BROWN
BL BLUE
LOW VOLTAGE JUNCTION BOX

For outdoor temperatures below 0° F with 50% or higher relative humidity, set outdoor thermostat at 0° F
NOTE 1: OT18 #2 CAN BE CONNECTED BETWEEN W2 OF THERMOSTAT AND BROWN WIRE IF DESIRED.
COLOR CODES R --RED Y --YELLOW BL-BLUE BR-BROWN O --ORANGE W -WHITE G --GREEN
OT18-60A Outdoor Thermostat

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 93

ACCESSORIES WIRING DIAGRAMS
CONNECT PARALLEL TO REVERSING VALVE 24 VAC ( IF USED ) SEE NOTE 2

480-600 120-277

VAC

LINE 1 / MOTOR 1

ICM CONTROLS

N.C. HEAT PUMP

VAC

24 HEAT PROBE PROBE PROBE

VAC PUMP S1

LINE 2

10 AMP MAX

FULL VARIABLE SPEED SPPED
CUT OUT SPEED

HARD START

MOTOR 2

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

SENSOR

( IF USED ) SEE NOTE 3
RUN CAPACITOR
CONNECT TO TERMINAL BLOCK Y (CALL FOR COOL) BL (COMMON)
RETURN BEND END OF CONDENSER COIL

NOTES: 1. USE COPPER CONDUCTORS ONLY. 2. ALTERNATE WIRING FOR HEAT PUMP APPLICATIO,N, MAKE A PARALLEL CONNECTION FROM THE REVERSING VALVE 24 VAC POWER SUPPLY TO THE HEAT PUMP TERMINALS ON THE CONTROL. THE SELECT JUMPER MUST BE IN THE NORMALLY CLOSED POSITION FOR NON-ENERGIZED REVERSING VALVE DURING HEATING. 3. ALTERNATE WIRING FOR SINGLE PHASE APPLICATION; THREE PHASE MODELS DOES NOT REQUIRE A DUAL RUN CAPACITOR. 4. WIRING DIAGRAM SHOWS CONTROLLER CONNECTION FOR 120 TO 277 VOLTS SUPPLY; FOR 480-600 VOLT APPLICATION, CONNECT POWER SUPPLY BETWEEN LINE 2 AND THE 480-600 V. AC TERMINALS

LEGEND RD_____________ RED BK _____________BLACK PU _____________PURPLE BR _____________BROWN YL _____________YELLOW BU ____________ BLUE
0140M00108-C

NOTICE: The cut out speed & hard start settings are factory preset. Changing those settings may cause early motor failure.
LLOoWw AAmMbBiIeEnNtTFoFrO-R1DDSMCo/DdSeGls 3 - 5 TON

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 94

ACCESSORIES WIRING DIAGRAMS

OFF/ON TRBL SHUTDN 1/2 SENSORS 7/0 MIN TMPR DELAY

SMOKE DETECTOR Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
95

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

SD1

SD2 1

YL YL RD BK

SEN1

YL YL RD BK

SEN2

24V AC/DC

AUX OUT +

AUX OUT -

INT/AUX -

INT +

ALARM

R TEST

R RESET

ACC

SD-PB

11 15

20 19

ALARM

SUP

AUX A

AUX B

PU BR

PLM

PLF

1 PU

2 PK

3 RD

4 BL

NOTES:
1. SMOKE DETECTOR 2 ONLY PRESENT ON UNITS WITH SUPPLY AND RETURN SMOKE DETECTORS INSTALLED. 2. SENSORS DIP SWITCH MUST BE SET TO THE NUMBER OF SMOKE DETECTORS INSTALLED ON THE UNIT.

BOOKLET NO.

DESCRIPTION

DKWDB0001B

SMOKE DETECTOR

RD BL

SD PLM

ES PLF 1 RD 2 PK 3 RD 4 BL

RD TB-XS

PAGE 31 OF 32

BL TB-C

PK
TTBB--EESS

ACCESSORIES WIRING DIAGRAMS
Disconnect Module Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 96

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

SUPPLY VOLTAGE

GND PB

BOOKLET NO. DKWDB0001B

UNIT VOLTAGE
DESCRIPTION DISCONNECT-NON-FUSED

PAGE 10 OF 32

ACCESSORIES WIRING DIAGRAMS
PHASE MONITOR - DBC/DBH MODELS Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
97

ES PLM

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

LOW VOLTAGE HARNESS

ES PLF

LOW VOLTAGE

TB-XS

TB-C

PK TB-ES/S2

BOOKLET NO. DKWDB0001B

PHASE MONITOR

OR LINE VOLTAGE

DESCRIPTION PHASE MONITOR

BK POWER HARNESS
PAGE 26 OF 32

POWER BLOCK L1 L2 L3

ACCESSORIES WIRING DIAGRAMS
Phase Monitor - DBG Model Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 98

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

1 PU 2 PK 3 RD 4 BL
NOTE 1

LOW VOLTAGE

NOTE 2

LINE VOLTAGE

GND

0140L07169-A

PHASE MONITOR

LINE VOLTAGE

COMPRESSOR CONTACTOR
L1 T1

BK RD

L2 T2 TO COMPRESSOR MOTOR
L3 T3

NOTES:
1. CONNECT TO 4 PIN SAFETY JUMPER PLUG / OTHER OPTIONAL SAFETY EQUIPMENT.
2. CONNECT TO 4 PIN SAFETY PLUG ON THE UNIT / OTHER OPTIONAL SAFETY EQUIPMENT.

WIRE CODE

BLACK BK

BLUE

ORANGE OR

PINK

PURPLE PU

RED

FACTORY WIRING

FIELD WIRING

HIGH VOLTAGE LOW VOLTAGE OPTIONAL HIGH VOLTAGE OPTIONAL LOW VOLTAGE

HIGH VOLTAGE LOW VOLTAGE
EARTH GROUND

CHASSIS GROUND

HEATER KITS

Heater Kits for Direct Drive Models

Part Number

Description

EHXD-1S05 ELECTRIC HEAT KIT 5KW - 240V - 1PH

EHXD-1S10 ELECTRIC HEAT KIT 10KW - 240V - 1PH

EHXD-1S15 ELECTRIC HEAT KIT 15KW - 240V - 1PH

EHXD-1S16 ELECTRIC HEAT KIT 15KW - 240V - 1PH

EHXD-1S18 ELECTRIC HEAT KIT 18KW - 240V - 1PH

EHXD-1S21 ELECTRIC HEAT KIT 20KW - 240V - 1PH

EHXD-1S22 ELECTRIC HEAT KIT 20KW - 240V - 1PH

EHXD-3S05 ELECTRIC HEAT KIT 5KW - 240V - 3PH

EHXD-3S10 ELECTRIC HEAT KIT 10KW - 240V - 3PH

EHXD-3S15 ELECTRIC HEAT KIT 15KW - 240V - 3PH

EHXD-3S16 ELECTRIC HEAT KIT 15KW - 240V - 3PH

EHXD-3S18 ELECTRIC HEAT KIT 18KW - 240V - 3PH

EHXD-3S21 ELECTRIC HEAT KIT 20KW - 240V - 3PH

EHXD-3S22 ELECTRIC HEAT KIT 20KW - 240V - 3PH

DRC/H *****XXXXXXXXXXXXXX

Minimum Airflow for Electric Heat Direct Drive

Unit

Heater Kit Model Number Minimum CFM

DBC0361D

EHXD-1S05

DBH0361D

EHXD-1S10 EHXD-1S16

DBC0363D

EHXD-3S05 EHXD-3S10

1175

DBH0363D

EHXD-3X16

EHXD-1S05

DBC0481D DBH0481D

EHXD-1S10 EHXD-1S15 EHXD-1S18

EHXD-1S22

EHXD-3S05

1400

DBC0483D DBC0483D

EHXD-3S10 EHXD-3S15 EHXD-3S18

EHXD-3S22

EHXD-1S05

DBC0601D DBH0601D

EHXD-1S10 EHXD-1S15 EHXD-1S18

EHXD-1S21 EHXD-3S05

1625

DBC0603D DBH0603D

EHXD-3S10 EHXD-3S15 EHXD-3S18

EHXD-3S21

ATTENTION INSTALLING PERSONNEL Use only the heater kit specified for each model as dictated by the table above.
99

EHSD-1S05, EHSD-1S10 * For Direct Drive Models Only Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
100

BOOKLET NO. DKWDB0001B

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

1 LC 2

HTR 1

1 LC 2

HTR 2

1 LC 2

HTR 3

RD TL

YL RD

YL RD BK

SCR

YL GR

CT1

TR1

RS1

BK BK

RD WH

135

0-10

4-20

2200

SCR SETTING

(+)DCV

(-)DCV

COM

DESCRIPTION ELECTRIC HEAT-1PH, 3 COIL, SCR

PAGE 13 OF 32

0200-149-180-SCR MODEL: EHS*-1S05, EHS*-1S10 * = BELT/DIRECT DRIVE

EHK1-10

HEATER KIT WIRING DIAGRAMS

EHXD-1S05, EHXD-1S10 * For Direct Drive Models Only Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
101

BOOKLET NO. DKWDB0001B

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

1 LC 2

HTR 1

1 LC 2

HTR 2

1 LC 2

HTR 3

YL RD

YL RD BK

CT1

WH TR1
BK
BK

DESCRIPTION ELECTRIC HEAT-1PH, 3 COIL

PAGE 14 OF 32

RS1 RD

PC 1

COM

0200-149-180 MODEL: EHX*-1S05, EHX*-1S10 * = BELT/DIRECT DRIVE

EHK1-15

HEATER KIT WIRING DIAGRAMS

EHSD-1S15, EHSD-1S18, EHSD-1S20 *For Direct Drive Models Only
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
102

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

FL FL

YL RD

HTR 4

1 LC 2 BK
TL

1 LC 2

HTR 5

RD 1 LC 2

HTR 6

TL YL

SSR
(-) (+)
BK

FL FL

YL RD

HTR 1

1 LC 2 BK
TL

HTR 2

1 LC 2 TL

HTR 3

1 LC 2 TL

RD YL

GR YL

CT1

WH
BK BK
OP OP

CT2

OP OP

S2 (-) S1 (+) 5 4 3 2 1 24VAC COMM

STAGES

(0-10) SW2

901

6 54

SLAVE 4-20 mA OFF
OFF
TEST
OFF
OFF
OFF
OFF

ELECTRONIC STEP CONTROLLER SETTINGS

SW1

MASTER

0-10VDC

TSTAT

VERN

CONTROL

STAGE DELAY

20 (SEC)

BL TR1
BK BK
BR

RD BL

(+)DCV

GR BL

(-)DCV

COM

RS1 WH
WH

TSTAT (-)GND (+)VDC (+)mA

BOOKLET NO. DKWDB0001B

BK BK

ESC BK

NOTE: 1. THE ELECTRONIC STEP CONTROLLER IS FACTORY SET TO A STAGE TIME DELAY OF 75 SECONDS.
THE VALUE OF THE STAGE DELAY IS DETERMINED BY THE SUM OF ALL STAGE DELAY DIP SWITCHES IN THE ON POSITION.

0200-149-181-SCR

DESCRIPTION

PAGE

MODEL: EHS*-1S15, EHS*-1S18, EHS*-1S20

ELECTRIC HEAT-1PH, 6 COIL, SCR

15 OF 32

* = BELT/DIRECT DRIVE

EHK1-18

HEATER KIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

EHXD-1S15, EHXD-1S18, EHXD-1S20 *For Direct Drive Models Only
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 103

FL FL

YL RD

HTR 4

1 LC 2
BK TL

HTR 5 HTR 6

1 LC 2
TL RD
1 LC 2
TL YL

FL FL

YL RD

HTR 1

1 LC 2
BK TL

HTR 2 HTR 3

1 LC 2
TL RD
1 LC 2
TL YL

BOOKLET NO. DKWDB0001B

CT1

RS1 CT2

BR BK

BK BK

TR1

BK BK

DESCRIPTION ELECTRIC HEAT-1PH, 6 COIL

BK BK

OP OP

PAGE 16 OF 32

BL BL

RS2 RD
RD

BR WH

PC 1

COM

0200-149-181 MODEL: EHX*-1S15, EHX*-1S18, EHX*-1S20 * = BELT/DIRECT DRIVE

EHK1-20

HEATER KIT WIRING DIAGRAMS

EHS*-3S05, EHS*-3S10, EHS*-3S15 Direct Drive
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
104

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

BOOKLET NO. DKWDB0001B

YL FL
RD FL
BK FL

HTR 1 HTR 2

1 LC 2

1 LC 2 RD
TL

1 LC 2

HTR 3

BK YL RD

SCR

T1 T2 L1 L2

YL GR

CT1

RD WH

BK BK

BK TR1

RD BL

135

0-10

4-20

2200

SCR SETTING

WH RS1

(+)DCV

(-)DCV

COM

OP OP OP L1 L2 L3

DESCRIPTION ELECTRIC HEAT-3PH, 3 COIL, DELTA SCR

PAGE 17 OF 32

0200-149-183-SCR MODEL: EHS*-3S05, EHS*-3S10, EHS*-3S15 * = BELT/DIRECT DRIVE

EHK*-10/EHK*-15/EHK*-16

HEATER KIT WIRING DIAGRAMS

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

EHX*-3S05, EHX*-3S10, EHX*-3S15 Direct Drive
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 105

BOOKLET NO. DKWDB0001B

YL FL
RD FL

HTR 1 HTR 2

1 LC 2

1 LC 2 RD
TL

1 LC 2

HTR 3

YL RD

CT1
WH TR1
BK
BK

DESCRIPTION ELECTRIC HEAT-3PH, 3 COIL, DELTA

OP OP OP L1 L2 L3
PAGE 18 OF 32

WH
RS1 RD

PC 1

COM

0200-149-183 MODEL: EHX*-3S05, EHX*-3S10, EHX*-3S15 * = BELT/DIRECT DRIVE

EHK[3, 4]-18

HEATER KIT WIRING DIAGRAMS

TSTAT (-)GND (+)VDC (+)mA
EHS*-3S18, EHS*-3S20, EHS*-3S30 Direct Drive
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 106

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

BK RD YL

1 LC 2

HTR 4

1 LC 2

HTR 5

1 LC 2

HTR 6 TL

YL BK RD

BK RD YL

1 LC 2

HTR 1

1 LC 2

HTR 2

1 LC 2

HTR 3

YL BK RD

STAGES

(0-10) SW2

901

6 54

SLAVE 4-20 mA OFF OFF TEST OFF OFF OFF OFF

MASTER

0-10VDC

TSTAT

VERN

CONTROL

STAGE DELAY

20 (SEC)

SW1

ELECTRONIC STEP CONTROLLER SETTINGS

SSR
(-) (+) GR

BK BK

CT1

CT2

BK BK BK

BK
BK GY
WH YL GR

TR1 RD
RS1 RD
WH BL

S2 (-) S1 (+) 5 4 3 2 1 24VAC COMM

OP OP OP

BK BK BK

BK BK
BK

ESC

NOTE:

L1 L2 L3

1. THE ELECTRONIC STEP CONTROLLER IS FACTORY SET TO A STAGE TIME DELAY OF 75 SECONDS. THE VALUE OF THE STAGE DELAY IS DETERMINED BY THE SUM OF ALL STAGE DELAY DIP SWITCHES IN THE ON POSITION.

BOOKLET NO.

DESCRIPTION

PAGE

DKWDB0001B

ELECTRIC HEAT-3PH, 6 COIL, DELTA SCR

19 OF 32

(+)DCV

(-)DCV

COM

0200-149-185-SCR MODEL: EHS*-3S18, EHS*-3S20, EHS*-3S30 * = BELT/DIRECT DRIVE

EHK[3, 4, 7]-20 & 25

HEATER KIT WIRING DIAGRAMS

EHX*-3S18, EHX*-3S20, EHX*-3S30 Direct Drive
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
107

BK RD YL

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

FL FL

HTR 4 HTR 5

1 LC 2 TL
1 LC 2 TL

1 LC 2

HTR 6

YL BK RD

BK RD YL

FL FL

HTR 1 HTR 2

1 LC 2 TL
1 LC 2 TL

1 LC 2

HTR 3

YL BK RD

BL BL

CT1 WH

OP OP OP BK BK BK

RS1 RD WH
BK BK BK

L1 L2 L3

BOOKLET NO. DKWDB0001B

DESCRIPTION ELECTRIC HEAT-3PH, 6 COIL, DELTA

CT2

OP OP OP

RS2 BR RD

TR1

BL BR

PC 1 2 3

BL WH

COM

PAGE 20 OF 32

0200-149-185 MODEL: EHX*-3S18, EHX*-3S20, EHX*-3S30 * = BELT/DIRECT DRIVE

EHK1-15

HEATER KIT WIRING DIAGRAMS

EHS*-4S05, EHS*-4S10, EHS*-4S15, EHS*-7S05, EHS*-7S10, EHS*-7S15
Direct Drive Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
108

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

YL FL
RD FL
BK FL

HTR 1 HTR 2

1 LC 2 TL
1 LC 2 TL

HTR 3

1 LC 2 TL

RD YL

SCR
T1 T2 L1 L2
BL
RD YL BL

CT1 WH BK

BK TR1

RD BL

GR RD

OP OP OP L1 L2 L3

BOOKLET NO. DKWDB0001B

DESCRIPTION ELECTRIC HEAT-3PH, 3 COIL, WYE SCR

PAGE 21 OF 32

135

0-10

4-20

2200

SCR SETTING

(+)DCV

(-)DCV

COM

5 RS1

0200-149-186-SCR MODEL: EHS*-4S05, EHS*-4S10, EHS*-4S15 MODEL: EHS*-7S05, EHS*-7S10, EHS*-7S15 * = BELT/DIRECT DRIVE

EHK*-10/EHK*-15

HEATER KIT WIRING DIAGRAMS
EHX*-4S05, EHX*-4S10, EHX*-4S15, EHX*-7S05, EHX*-7S10, EHX*-7S15
Direct Drive Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
109

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

YL FL
RD FL
BK FL

HTR 1 HTR 2

1 LC 2 TL
1 LC 2 TL

HTR 3

1 LC 2 TL

BOOKLET NO. DKWDB0001B

CT1

WH BK
BK

DESCRIPTION ELECTRIC HEAT-3PH, 3 COIL, WYE

OP OP OP
L1 L2 L3
PAGE 22 OF 32

RS1 TR1
RD BL

PC 1

2 3

COM

0200-149-186 MODEL: EHX*-4S05, EHX*-4S10, EHX-4S15 MODEL: EHX*-7S05, EHX*-7S10, EHX*-7S15 * = BELT/DIRECT DRIVE

HEATER KIT WIRING DIAGRAMS
TSTAT (-)GND (+)VDC (+)mA
EHS*-4S18, EHS*-4S20, EHS*-4S30, EHS*-7S18, EHS*-7S20, EHS*-7S30
Direct Drive Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. 110

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

YL FL
RD FL
BK FL

HTR 4 HTR 5

1 LC 2 TL
1 LC 2 TL

1 LC 2 HTR 6 TL

YL FL
RD FL
BK FL

HTR 1 HTR 2

1 LC 2 TL
1 LC 2 TL

HTR 3

1 LC 2 TL

BK RD

STAGES

(0-10) SW2

901

6 54

SLAVE 4-20 mA OFF
OFF
TEST
OFF
OFF
OFF
OFF

SW1

ELECTRONIC STEP CONTROLLER SETTINGS

MASTER

0-10VDC

TSTAT

VERN

CONTROL

STAGE DELAY

20 (SEC)

GR YL

SSR (-) YL (+)
BK BK

BK RD YL

CT1

CT2

BK BK BK

OP OP OP

BK BK BK

BK
BK GY
WH YL GR

TR1 RD
BL

S2 (-) S1 (+) 5 4 3 2 1 24VAC COMM

ESC
GR YL

RD
RS1 WH

(+)DCV

(-)DCV

COM

L1 L2 L3
NOTE : 1. THE ELECTRONIC STEP CONTROLLER IS FACTORY SET TO A STAGE TIME DELAY OF 75 SECONDS.
THE VALUE OF THE STAGE DELAY IS DETERMINED BY THE SUM OF ALL STAGE DELAY DIP SWITCHES IN THE ON POSITION.

BOOKLET NO.

DESCRIPTION

PAGE

DKWDB0001B

ELECTRIC HEAT-3PH, 6 COIL, WYE SCR

23 OF 32

0200-149-187-SCR MODEL: EHS*-4S18, EHS*-4S20, EHS*-4S30 MODEL: EHS*-7S18, EHS*-7S20, EHS*-7S30 * = BELT/DIRECT DRIVE

HEATER KIT WIRING DIAGRAMS
EHX*-4S18, EHX*-4S20, EHX*-4S30, EHX*-7S18, EHX*-7S20, EHX*-7S30
Direct Drive Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
111

YL FL
RD FL
BK FL

HTR 4 HTR 5

1 LC 2 TL
1 LC 2 TL

HTR 6

1 LC 2 TL

HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

YL FL
RD FL
BK FL

HTR 4 HTR 5

1 LC 2 TL
1 LC 2 TL

HTR 6

1 LC 2 TL

BOOKLET NO. DKWDB0001B

BK RD YL BL
BL

CT1 WH
BK BK BK OP OP OP BK BK BK
PB

RS1 RD WH
BK BK BK

BK RD YL BL

CT2

OP OP OP

RS2 BR RD

BL BR

TR1

PC 1

COM

L1 L2 L3
DESCRIPTION ELECTRIC HEAT-3PH, 6 COIL, WYE

PAGE 24 OF 32

0200-149-187 MODEL: EHX*-4S18, EHX*-4S20, EHX*-4S30 MODEL: EHX*-7S18, EHX*-7S20, EHX*-7S30 * = BELT/DIRECT DRIVE

SCHEDULED MAINTENANCE

MAINTENANCE WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage. Improper servicing could result in dangerous operation, serious injury, death or property damage.
· Before servicing, disconnect all electrical power to furnace.
· When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.
· Verify proper operation after servicing.
WARNING
HIGH VOLTAGE! Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
WARNING

7. Check operating temperatures and pressures. 8. Check and adjust temperature and pressure controls. 9. Check and adjust damper linkages. 10. Check operation of all safety controls. 11. Examine gas furnaces (see below and the User's
Information Manual). 12. Check condenser fans and tighten set screws.

Filters

CAUTION

To prevent property damage due to fire and loss of equipment efficiency or equipment damage due to dust and lint build up on internal parts, never operate unit without an air filter installed in the return air system.

Every application may require a different frequency of replacement of dirty filters. Filters must be replaced at least every three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate heating or cooling performance. Filter inspection should be made at least every two months; more often if necessary because of local conditions and usage.

To prevent personal injury or death due to improper installation, adjustment, alteration, service or maintenance, refer to this manual. For additional assistance or information, consult a qualified installer, servicer agency or the gas supplier.
CAUTION
Sheet metal parts, screws, clips and similar items inherently have sharp edges, and it is necessary that the installer and service personnel exercise caution.
Preventive maintenance is the best way to avoid unnecessary expense and inconvenience. Have this system inspected at regular intervals by qualified service personnel, at least twice a year. Routine maintenance should cover the following items: 1. Tighten all set screws, and wire connections. 2. Clean evaporator and condenser coils mechanically
or with cold water, if necessary. Usually any fouling is only matted on the entering air face of the coil and can be removed by brushing. 3. Replace filters as needed (see below). 4. Check for blockage of condensate drain. 5. Check power and control voltages. 6. Check running amperage.

Dirty throwaway filters should be discarded and replaced with a new, clean filter.
Disposable return air filters are supplied with this unit. See the unit Specification Sheet or Technical Manual for the correct size and part number. To remove the filters, remove the filter access panel on return side of the unit.
Cabinet Finish Maintenance Use a fine grade automotive wax on the cabinet finish to maintain the finish's original high luster. This is especially important in installations with extended periods of direct sunlight.
Clean Outside Coil (Qualified Servicer Only) The coil with the outside air flowing over it should be inspected annually and cleaned as frequently as necessary to keep the finned areas free of lint, hair and debris.
Condenser And Induced Draft Motors Bearings on the condenser fan motors and the combustion fan motor are permanently lubricated. No additional oiling is required.

112

SCHEDULED MAINTENANCE

Flame Sensor (Qualified Servicer Only) A drop in the flame current can be caused by a nearly invisible coating on the flame sensor. This coating, created by the fuel or combustion air supply, can be removed by carefully cleaning the flame sensor with steel wool.

Flames should be stable, soft and blue (dust may cause orange tips but must not be yellow). The flames must extend directly outward from the burner without curling, floating or lifting off.

NOTE: After cleaning, the microamp signal should be stable and in the range of 4 - 6 microamps DC.

Flue Passages (Qualified Servicer Only) At the start of each heating season, inspect and, if necessary, clean the unit flue passage.
Lubrication The fan shaft bearings, the supply fan motors, the condenser fan motors and compressors are permanently lubricated.

Check the burner flames for: 1. Good adjustment 2. Stable, soft and blue 3. Not curling, floating, or lifting off.

Inspection & Cleaning All flue product carrying areas of the furnace, its vent system, and main burners should be examined by a qualified service agency, and cleaned if necessary, before the start of each heating season. This examination is necessary for continued safe operation. Particular attention should be given to deterioration from corrosion or other sources. This examination is accomplished in the following manner. 1. Disconnect power to the unit and remove furnace
section access panel. 2. Remove burner assembly:
A. Disconnect the wires from the gas valve after noting which wires are connected to each terminal.
B. Disconnect wires from the flame rod and ignition electrode.
C. Disconnect the gas piping at the union. D. The entire burner assembly can now be removed
from the unit. NOTE: Use all screws that were removed; they are necessary for safe and proper operation of the unit.
3. Inspect and periodically clean the vent outlet (bird screen) on the access panel.

burner flame
WARNING
To avoid personal injury or death due to electric shock, do not remove any internal compartment covers or attempt any adjustment. Contact a qualified servicer at once if an abnormal flame should develop.
At least once a year, prior to or during the heating season, make a visual check of the burner flames.
NOTE: This will involve removing and reinstalling the heat exchanger door on the unit, which is held by two screws. If you are uncertain about your ability to do this, contact a qualified servicer.
If a strong wind is blowing, it may alter the airflow pattern within the unit enough that an inspection of the burner flames is not possible.
Functional Parts Refer to the unit Parts Catalog for a list of functional parts. Parts are available from your distributor.

NOTE: Periodic observation of the flame and a log of C02 measurements are recommended. This will aid in determining whether the furnace is operating efficiently or if the furnace requires cleaning.

113

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