Trane Installer's Guide

Introduction

Read this manual thoroughly before operating or servicing this unit. This document is customer property and is to remain with this unit. Return to the service information pack upon completion of work.

Note: See AHRI directory for approved indoor and outdoor model combinations. Only Trane coils and air handlers are approved for use with multi-speed outdoor units.

Table 1. Operating Range

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.

• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
• NOTICE: Indicates a situation that could result in equipment or property-damage only accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants.

Important Responsible Refrigerant Practices

Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

Proper Field Wiring and Grounding Required!

WARNING: Failure to follow code could result in death or serious injury.

All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state/national electrical codes.

Personal Protective Equipment (PPE) Required!

WARNING: Failure to wear proper PPE for the job being undertaken could result in death or serious injury.

Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

• Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS and OSHA/GHS (Global Harmonized System of Classification and Labelling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE.

Follow EHS Policies!

WARNING: Failure to follow instructions below could result in death or serious injury.

• All Trane personnel must follow the company's Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies.
• Non-Trane personnel should always follow local regulations.

Cancer and Reproductive Harm!

WARNING: This product can expose you to chemicals, including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Safety Hazard!

WARNING: Failure to follow instructions below could result in death or serious injury or property damage.

This unit is not to be used by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety.

Do not allow children to play or climb on the unit or to clean or maintain the unit without supervision.

Hazardous Voltage!

WARNING: Failure to disconnect power before servicing could result in death or serious injury.

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Verify that no power is present with a voltmeter.

R-454B Refrigerant!

WARNING: Failure to use proper equipment or components as described below could result in death, serious injury, or equipment damage.

• Use ONLY R-454B rated service equipment with these units.
• All R-454B systems with variable speed compressors use variable speed compressor oil, which absorbs moisture from the air. To limit this hygroscopic action, keep the system sealed. If exposed to air for over 4 hours, replace the compressor oil.
• Never break a vacuum with air and always replace driers when opening the system to replace components.

Hot Surface!

WARNING: Failure to follow instructions below could result in minor to severe burns. Do not touch top of compressor. It may be hot.

Refrigerant under High Pressure!

WARNING: Failure to follow instructions below could result in an explosion which could result in death or serious injury or equipment damage.

System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.

Grounding Required!

WARNING: Failure to follow instructions below could result in death or serious injury, or property damage.

• Reconnect all grounding devices.
• All parts of this product that are capable of conducting electrical current are grounded.
• If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.

System Charge!

WARNING: Failure to follow instructions below could result in abrupt release of system charge and could result in serious injury or property damage. When opening the suction and liquid line service valve, turn the valve stem counterclockwise only until the stem contacts the rolled edge. Do not apply torque.

Electrical Shock Hazard!

WARNING: Failure to follow instructions below could result in death or serious injury or property damage. Confirm proper grounding before connecting electrical supply.

Risk of Fire — Flammable Refrigerant!

WARNING: Failure to follow instructions below could result in death or serious injury, and equipment damage.

• To be repaired only by trained service personnel.
• Do not puncture refrigerant tubing.
• Dispose of properly in accordance with federal or local regulations.

Ventilation Required!

WARNING: Failure to follow instructions below could result in death or serious injury or property damage. Confirm the area is adequately ventilated before breaking into the system or conducting any hot work.

Caution!

CAUTION: Failure to follow instructions below could result in minor to moderate injury or equipment damage.

• For brazing, confirm all joints are brazed, not soldered.
• For mechanical connections, confirm a negative leak test.
• Inspect lines and use proper service tools.

Equipment Damage!

NOTICE: Failure to follow instructions below could result in equipment damage. Use only R-454B rated indoor models, service equipment, and components with these units.

Copyright

This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

Trademark

All trademarks referenced in this document are the trademarks of their respective owners.

Unit Location Considerations

Piping Guidelines

Piping material, pipe routing, and installation shall include protection from physical damage in operation and service, and be in compliance with national and local codes and standards. All field joints shall be accessible for inspection prior to being covered or enclosed. Install of pipe work shall be kept to a minimum. Provisions shall be made for expansion and contraction of long runs of piping.

Table 2. Unit Dimensions and Weight

* Weight values are estimated (uncrated).

• When mounting the outdoor unit on a roof, be sure the roof will support the unit's weight.
• Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure.

Table 3. Refrigerant Line and Service Valve Connection Sizes

(a) For max length of refrigerant lines from outdoor to indoor unit refer Table 4.

(b) Select correct line set size in set up app. Default is set to alternate line sizes.

Table 4. Lineset sizes and length

Note: Ratings/Primary, Legacy Lineset, Smallest Allowed

2 ΤΟΝ AC (HP) Subcooling Adders

Note: 3/8 line sizes do not require any additional subcool adders.

3 ΤΟΝ AC (HP) Subcooling Adders

Note: 3/8 line sizes do not require any additional subcool adders.

4 ΤΟΝ

Note: Ratings/Primary, Legacy Lineset, Smallest Allowed

4 ΤΟΝ AC (HP) Subcooling Adders

Note: 3/8 line sizes do not require any additional subcool adders.

5 ΤΟΝ

Note: Ratings/Primary, Legacy Lineset, Smallest Allowed

5 ΤΟΝ AC (HP) Subcooling Adders

Note: 3/8 line sizes do not require any additional subcool adders.

Table 5. Alternate Refrigerant Line and Service Valve Connection Sizes

(a) For max length of refrigerant lines from outdoor to indoor unit refer Table 4.

Subcool Charging Correction Charts

Figure 1. Subcool Charging Corrections – 2.0 Ton

Figure 2. Subcool Charging Corrections – 3.0 Ton

Figure 3. Subcool Charging Corrections – 4.0 Ton

Figure 4. Subcool Charging Corrections – 5.0 Ton

Note: For systems with 3/8" line set diameters, use design subcooling for all length and lift combinations.

R-454B Refrigerant Charging Chart

Table 6. Refrigerant properties

Table 6. Refrigerant properties (continued)

Note: When charging to Subcooling values, use Bubble Temp chart. If referencing Superheat, use Dew Point chart.

Suggested Locations

Table 7. Suggested Locations for Best Reliability

• Ensure the top discharge area is unrestricted for at least 5 feet above the unit.
• Provide at least 3 feet clearance in front of the control box (access panels) and any other side requiring service.
• Do not locate close to bedrooms as operational sounds may be objectionable.
• Avoid locations near windows and similar areas where condensation and freezing defrost vapor can annoy a customer.
• Position the outdoor unit a minimum of 12" from any wall or surrounding shrubbery to ensure adequate airflow.
• Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water or icicles from falling directly on the unit.
• Position the outdoor unit a minimum of 12" from any wall or surrounding shrubbery to ensure adequate airflow.
• Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water or icicles from falling directly on the unit.

Figure: Diagram showing minimum clearances for outdoor unit placement, including 5' above, 3' in front, and 12" from walls/shrubbery.

Table 8. Cold Climate Considerations (Heat Pump Only)

Note: It is recommended that these precautions be taken for units being installed in areas where snow accumulation and prolonged below-freezing temperatures occur.

• Units should be elevated 3-12 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing.
• Ensure that drain holes in unit base pan are not obstructed, preventing drainage of defrost water.
• If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides of the unit.

Figure: Diagram showing outdoor unit elevated on snow legs with a snow barrier.

Coastal Considerations

If installed within one mile of salt water, including seacoasts and inland waterways, models without factory supplied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.

Unit Preparation

1. Check for damage and report promptly to the carrier any damage found to the unit.
2. To remove the unit from the pallet, remove tabs by cutting with a sharp tool.

Figure: Image showing a unit on a pallet with an 'X' mark, and a close-up of removing tabs.

Setting Up the Unit

Table 9. Pad Installation

When installing the unit on a support pad, such as a concrete slab, consider the following:

• The pad should be at least 1" larger than the unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade to allow for drainage.
• The pad location must comply with National, State, and Local codes.

Figure: Diagram showing an outdoor unit placed on a concrete pad.

Refrigerant Line Considerations

Table 10. Factory Charge

The outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify proper system charge via subcooling (TXV/EEV).

Table 11. Required Refrigerant Line Length

Determine the required line length and lift. You will need this to determine the subcooling charging corrections later in the installation process.

Total Line Length = ______ Ft.

Total Vertical Change (lift) = ______ Ft.

Figure: Diagram illustrating line length and lift measurement.

Table 12. Refrigerant Line Insulation

Important: The Vapor Line must always be insulated. DO NOT allow the Liquid Line and Vapor Line to come in direct (metal to metal) contact.

Note: The Vapor Line must always be insulated. Insulating the liquid line through attic spaces may benefit system performance by minimizing heat gain in the liquid line.

Figure 5. Refrigerant line insulation

Diagram showing insulated vapor line and uninsulated liquid line, with a prohibition symbol over direct contact.

Table 13. Reuse Existing Refrigerant Lines

Brazed Joints!

CAUTION: Failure to follow instructions below could result in minor to moderate injury or equipment damage. When using existing refrigerant lines, verify all joints are brazed and not soldered.

For retrofit applications, where the existing indoor evaporator coil and/or refrigerant lines will be used, the following precautions should be taken:

• Ensure that the indoor evaporator coil and refrigerant lines are the correct size.
• Ensure that the refrigerant lines are free of leaks, acid, and oil.
• Important: For more information, see publication number SS-APG006-EN

Figure: Diagram showing refrigerant lines connected to an outdoor unit.

Table 14. Refrigerant Line Routing Precautions

Important: Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements.

Important: For buried linesets, see publication number SS-APG006-EN.

Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines.

For Example:

• When the refrigerant lines must be fastened to floor joists or other framing in a structure, use isolation type hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run though a wall, sill or enclosed ceiling- they should be insulated, isolated and serviceable if any braze connections are present.
• Isolate the lines from all duct work.
• Minimize the number of 90° turns.

Table 15. Isolation From Joist/Rafter

Diagram showing line set isolation from joist/rafter.

Table 16. Isolation In Wall Spaces

Diagram showing line set isolation in wall spaces.

Table 17. Isolation Through Wall

Diagram showing line set isolation through a wall, with sealant and insulation.

Refrigerant Line Brazing

Table 18. Braze the Refrigerant Lines

1. Remove caps or plugs. Use a deburring tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth.
2. Remove the pressure tap cap, plastic tab and valve core from each service valves.
3. Purge the refrigerant lines and indoor coil with dry nitrogen.

Note: A2L equipment shall have red marked service ports and pipes through which refrigerant is serviced.

Figure: Diagrams illustrating the brazing process.

4. Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge.
5. Braze the refrigerant lines to the service valves.
6. For Units shipped with a field-installed external drier, check liquid line filter drier's directional flow arrow to confirm correct direction of refrigeration flow (away from outdoor unit and toward evaporator coil) as illustrated. Braze the filter drier to the Liquid Line.
7. Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed.

Important: Remove the wet rag before stopping the dry nitrogen purge.

Note: Precautions should be taken to avoid heat damage to base pan during brazing. It is recommended to keep the flame directly off of the base pan.

7. Replace the pressure tap valve cores and plastic tabs after the service valves have cooled.

Refrigerant Line Leak Check

Table 19. Check for Leaks

Important: The outdoor unit should not be tested higher than 450 PSIG for servicing or component replacement. The indoor unit and linesets should be tested to the max pressure specified on the outdoor or indoor unit nameplate. The service valves should be closed when pressure testing the indoor unit and linesets to separate the outdoor unit from the indoor unit.

1. Final Pressure Check - Isolate the outdoor unit from the indoor unit and linesets using the service valves. Pressurize the indoor unit and linesets to the max pressure specified on the outdoor or indoor unit nameplate for a minimum of 60 minutes. Do not add additional refrigerant or test gas after reaching the indoor unit specified pressure. The system should show no loss of pressure once pressurized. Once the pressure test is complete follow the steps for evacuation.
2. OPTIONAL (Preliminary Pressure Check) - Pressurize the indoor unit and linesets to 150 PSIG using dry nitrogen.
3. Check for leaks by using a soapy solution at each brazed location.

Note: Remove nitrogen pressure and repair any leaks before continuing.

Figure: Diagram illustrating pressure testing setup.

Nitrogen Purge Times

Refrigerant Line and Indoor Coil Evacuation

Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete.

1. Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump.
2. Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 1500 microns in ten (10) minute.
3. When evacuation is complete, blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set.

Figure: Images of a micron gauge and a timer.

Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.

The following leak detection methods are deemed acceptable for all refrigerant systems:

• Electronic leak detectors calibrated for R454B
• Bubble method

If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.

Servicing

When Servicing:

• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially toxic or flammable atmospheres.
• Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
• Work shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapor being present while the work is being performed.
• If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand.
• Have a dry powder or CO2 fire extinguisher adjacent to the servicing area.
• Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
• A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

Important: The following leak detection methods are deemed acceptable for all refrigerant systems:

1. Electronic leak detectors calibrated for R-454B
2. Bubble method

Important: Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.

• If a leak is suspected, all naked flames shall be removed/extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
• If repairs must be made after system is charged, properly and safely remove or isolate refrigerant and purge the section of the system needing repair with inert gas or oxygen free nitrogen prior to opening the circuit.
• The REFRIGERANT CHARGE shall be recovered into the correctly marked recovery cylinders. Ensure that the outlet for the vacuum pump is not close to any potential ignition sources and that ventilation is available.

Nitrogen purge chart:

Nitrogen Purge Times

Ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge is available. Only use cylinders designated for the recovered refrigerant and labelled for that refrigerant. Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order.

A calibrated weighing scale shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Ensure any associated electrical components are sealed.

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder. Do not mix refrigerants.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that FLAMMABLE REFRIGERANT does not remain within the lubricant.

Service Valves

Table 20. Open the Gas / Vapor Service Valve First

Important: Leak check and evacuation must be completed before opening the service valves.

Note: Do not vent refrigerant gases into the atmosphere.

1. Remove valve stem cap.
2. Using a wrench, turn valve stem 1/4 turn counterclockwise to the fully open position.
3. Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/4 turn.

Note: Valve caps need to be brass or locking style.

Note: Opening the Vapor service valve first ensures the compressor oil stays in the compressor at start up.

Figure: Diagram showing how to open the gas/vapor service valve.

Table 21. Open the Liquid Service Valve

WARNING: System Charge!

Failure to follow instructions below could result in abrupt release of system charge and could result in serious injury or property damage. When opening the suction and liquid line service valve, turn the valve stem counterclockwise only until the stem contacts the rolled edge. Do not apply torque.

Important: Leak check and evacuation must be completed before opening the service valves.

4. Remove service valve cap.
5. Fully insert 3/16" hex wrench into the stem and back out counterclockwise until valve stem just touches the rolled edge (approximately five (5) turns).
6. Replace the valve cap to prevent leaks. Tighten finger tight plus an additional 1/4 turn.

Figure: Diagram showing how to open the liquid service valve.

Electrical – Low Voltage Communicating

Table 22. Low voltage maximum wire length

This table defines the size and combined total maximum length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat.

Note: The use of color coded low voltage wire is recommended to simplify connections between the outdoor unit, the control, and the indoor unit.

Table 23. Low voltage hook-up diagrams

Diagrams illustrating low voltage hook-up for various Trane systems.

Refrigerant Detection System Guidelines

• The approved ID/OD combination will provide sufficient safe ventilation in case of a leak.
• Refer Indoor Unit Installer's Guide for correct specifications on indoor unit install.
• All systems require Refrigerant Detection Systems.
• RDS (Refrigerant Detection System) included in an A2L System.

Electrical – High Voltage

Table 24. High Voltage Power Supply

WARNING: Live Electrical Components!

Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

When it is necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks.

The high voltage power supply must agree with the equipment nameplate. Power wiring must comply with national, state, and local codes. Follow instructions on unit wiring diagram located on the inside of the control box cover and in the Service Facts document included with the unit.

Figure: Diagram of an outdoor unit with electrical connections.

Table 25. High Voltage Disconnect Switch

WARNING: Electrical Shock Hazard!

Failure to follow instructions below could result in death or serious injury or property damage. Confirm proper grounding before connecting electrical supply.

WARNING: Hazardous Voltage!

Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Verify that no power is present with a voltmeter.

Install a separate disconnect switch at the outdoor unit.

For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem within the structure.

Table 26. High Voltage Disconnect Switch

Ground the outdoor unit per national, state, and local code requirements.

Figure: Grounding symbol.

Table 27. Cabling

WARNING: Safety Hazard!

Failure to follow instructions below could result in death or serious injury, and property damage. Confirm the cabling is protected from wear and tear, corrosion, excessive pressure, vibration, sharp edges, and any other adverse environmental effects.

Integrated Variable Speed Control Board LED Indicators

Figure: Diagram of the Integrated Variable Speed Control Board with LED indicators.

Multi-Speed Status/Fault List

Start Up

1. Ensure you have completed the following sections "Refrigerant Line Brazing," p. 18 through "Electrical - High Voltage," p. 26.
2. Set System Thermostat to OFF.
3. Turn ON disconnect(s) to apply power to the indoor and outdoor units.
4. Wait 20 minutes before starting the unit if the outdoor ambient temperature is below 85° F.

Figure: Image of a thermostat set to OFF, and an image of a 20-minute timer.

System Charge Adjustment

Table 28. Temperature measurements

Check the outdoor temperatures.

Subcooling in Cooling Mode is the only recommended method of charging between 55° F and 115° F ambient outdoor temperature. Confirm charge afterward by verifying subcooling.

For best results the indoor temperature should be kept between 70° F to 80° F.

Figure: Thermometer icons showing temperature ranges.

Table 29. Subcooling charging corrections

Determine the final subcooling value using total Line Length and Lift measured in "Required Refrigerant Line Length" and the "Subcooling Charging Corrections Charts".

Subcooling Charging Correction Worksheet

Total Line Length (ft): ______

Total Vertical Charge (lift) (Values from Required Refrigerant Line Length): ______

Design Subcooling Value (from nameplate or Service Facts): ______

Final Subcooling Value: ______

Note: Outdoor Temperature must be between 55°F and 115°F with Indoor Temperature kept between 70°F and 80°F. If starting up incolder conditions, will need to return when the conditions are correct to validate refrigerant charge.

Charging the Unit

Table 30. Proper Gauge Pressure

Using the Standard R-454B Subcool Charging Chart, adjust refrigerant level to attain proper gauge pressure.

Note: Use bubble point, per the included chart, for calculating subcooling. Add refrigerant if the Liquid Gauge Pressure is lower than the chart value.

1. Connect gauges to refrigerant bottle and unit as illustrated.
2. Purge all hoses.
3. Place refrigerant bottle on a scale and then open bottle.
4. Stop adding refrigerant when liquid line temperature and Liquid Gauge Pressure match the charging chart.

Note: Recover refrigerant if the Liquid Gauge Pressure is higher than the chart value.

Note: Ensure that contamination of different refrigerants does not occur when using charging equipment. Cylinders shall be kept in an appropriate position according to the instructions. Ensure that the REFRIGERATING SYSTEM is earthed prior to charging the system with refrigerant.

Figure: Diagram illustrating gauge connections and refrigerant bottle placement.

Table 31. Stabilize the system

5. Wait 20 minutes for the system condition to stabilize between adjustments.

Note: When the Liquid Line Temperature and Gauge Pressure approximately match the chart, the system is properly charged.

6. Remove gauges.
7. Replace service port caps to prevent leaks. Tighten finger tight plus an additional 1/6 turn.

Figure: Image of a 20-minute timer.

Table 32. System Information

8. Record system pressures and temperatures after charging is complete.

Outdoor model number = ______

Measured Outdoor Ambient = ______ °F

Measured Indoor Ambient = ______ °F

Measured Liquid Line Temp = ______ °F

Measured Suction Line Temp = ______ °F

Indoor Wet Bulb = ______ °F

Liquid Gauge Pressure = ______ PSIG

Suction Gauge Pressure = ______ PSIG

Table 33. Total System Charge

9. Complete the "Total System Charge" chart rating label below and label located on the outside of the unit with a permanent marker.

a. Charge added at Factory = ______ lb/oz

b. Charge added at install = ______ lb/oz

C. Total System Charge (a + b) = ______ lb/oz

Charging Below 55° F Outdoor Temperature in Heating Mode

Table 34. Charging below 55° F outdoor temperature in heating mode

The Subcooling Charging method in cooling is not recommended below 55° F outdoor temperature. The only recommended method of charging at outdoor temperatures below 55° F is weighing in the charge in heating mode.

STEP 1 - Determine additional charge.

Note: The nameplate charge value represents the amount of refrigerant shipped in the outdoor unit and is compatible with 10 feet of AHRI rated refrigerant lines and the smallest AHRI rated coil.

Using the method below, find the charge associated with the additional length of tubing above 10 ft. and record it below.

Calculating Charge Using the Weigh-In Method

1. Measure in feet the distance between the outdoor unit and the indoor unit. (Include the entire length of the line from the service valve to the IDU.) Subtract 10 ft from this entire length and record on line 1.
2. Enter the charge multiplier (0.47 oz./ft for 3/8" & 0.30 oz./ft for 5/16").
3. Multiply the total length of refrigerant tubing (Line 1) times the value on Step 2. Record the result on Line 3 of the Worksheet.
4. This is the amount of refrigerant to weigh-in prior to opening the service valves.

Worksheet:

1. Total Line length (ft) - 10 ft = ______

2. Charge multiplier = ______

3. Step 1 x Step 2 = ______

4. Refrigerant (oz) = ______

STEP 2 - Stabilize the system by operating for a minimum of 20 minutes.

At startup, or whenever charge is removed or added, the system must be operated for a minimum of 20 minutes to stabilize before accurate measurements can be made.

Figure: Image of a 20-minute timer.

STEP 3 - Complete the "Total System Charge" chart rating label below and label located on the outside of the unit with a permanent marker.

Note: Complete the "Total System Charge" chart when final charging is complete.

a. Charge added at Factory = ______ lb/oz

b. Charge added at install = ______ lb/oz

C. Total System Charge (a + b) = ______ lb/oz

STEP 4 - Return to site for adjustment.

Important: Return in the spring or summer to accurately charge the system in the "Charging Mode - Cooling" with outdoor ambient above 55° F.

Defrost Control (Heat Pump only)

Demand Defrost

The demand defrost control measures heat pump outdoor ambient temperature with a sensor located outside the outdoor coil. A second sensor located on the outdoor coil is used to measure the coil temperature. The difference between the ambient and the colder coil temperature is the difference or Delta-T measurement. This Delta-T measurement is representative of the operating state and relative capacity of the heat pump system. By measuring the change in Delta-T, we can determine the need for defrost. The coil sensor also serves to sense outdoor coil temperature for termination of the defrost cycle.

Fault Identification

A fault condition is indicated by the LED display on the control board.

Defrost Enabled

Demand Defrost is enabled with the following inputs to the Integrated Control:

• Outdoor ambient temperature sensor (ODS-B) reporting an outdoor temperature at or below 50° F.
• Heating demand from the thermostat for a specific time period.

Defrost Initiation

The calculated temperature difference between the outdoor temperature sensor and the coil temperature sensor is called Delta T. Defrost can occur once the current Delta T exceeds the Delta T initiate value. This adaptive logic assures a complete defrost for a range of outdoor temperatures.

DEFROST TERMINATION PROFILES

Diagram showing defrost termination profiles based on ambient and coil temperature.

NOTES: Forced Defrost

1. System must be running with demand from the thermostat.
2. Forced defrost can be initiated in heat mode only.
3. Press and hold the forced defrost button on the control board for over 5 seconds.
4. When forced defrost begins the LED display will show a 7 as the first digit.

Note: The defrost termination temperature can be increased by clipping the defrost termination jumper pin.

WARNING: Safety Hazard!

Failure to follow instructions below could result in death or serious injury and equipment or property damage.

• Do not use any items other than those approved by the manufacturer for defrosting or cleaning process.
• Store the appliance in a room without continuously operating ignition sources(for example: open flames, an operating gas appliance, or an operating electric heater).
• Do not pierce or burn.
• Be cautious that refrigerants may be odorless.

Checkout Procedures

The final phase of the installation is the system Checkout Procedures. The following list represents the most common items covered in a Checkout Procedure. Confirm all requirements in this document have been met.

• All wiring connections are tight and properly secured.
• Voltage and running current are within limits.
• All refrigerant lines (internal and external to equipment) are isolated, secure, and not in direct contact with each other or structure.
• All braze connections have been checked for leaks. A vacuum of 350 microns provides confirmation that the refrigeration system is leak free and dry. Additional refrigerant weight is recorded on a label by the unit nameplate.
• Final unit inspection to confirm factory tubing has not shifted during shipment. Adjust tubing if necessary so tubes do not rub against each other or any component when unit runs.
• Ductwork is sealed and insulated.
• All drain lines are clear with joints properly sealed. Pour water into drain pan to confirm proper drainage. Provide enough water to ensure drain trap is primed.
• Supply registers and return grilles are open, unobstructed, and air filter is installed.
• Indoor blower and outdoor fan are operating smoothly and without obstruction.
• Indoor airflow should be configured per indoor Installer's Guide.
• Verify blower and fan set screws are tight.
• Cover panels are in place and properly tightened.
• System functions safely and properly in all modes.
• Owner has been instructed on use of system and given manual.
• ENSURE Refrigerant Leak Detection system is operational.
• ENSURE refrigerant quantity is marked on OD unit.

Symbols

Figure: Table of symbols with their meanings, including warning, service indicator, pressure, and ultraviolet radiation symbols.

• [symbol ISO 7010-W021 (2011-05)]: warning; flammable materials
• [symbol ISO 7000-1659 (2004-01)]: service indicator; read technical manual
• A2L symbol: warning; low burning velocity material
• [symbol ISO 7000-1701 (2004-01)]: pressure
• [symbol IEC 60417-6040 (2010-08)]: ultraviolet radiation, instructional safeguard
• [symbol ISO 7000-1641 (2004-01)]: operator's manual; operating instructions
• Refrigerant class per ISO 817: Warning symbol for flammable materials.

Notices

FCC Notice

Contains FCC ID: WAP3025

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter.

This equipment has been tested and found to comply with the limits for Class B Digital Device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help

Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

IC Notice

Contains IC ID: 7922A-3025

This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de license. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil de doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.