TRANE IntelliPak2 Rooftop Units
Specifications
- Product Name: IntelliPakTM 2 Commercial Rooftop Air Conditioners
- Model: May 2025
- Manual Code: RT-SVX087C-EN
- Refrigerant: R-454B (Flammable A2L)
- Environmental Concerns: Lead and Bisphenol A (BPA) exposure
Product Usage Instructions
Only qualified personnel should install and service the equipment. Follow all safety warnings and precautions mentioned in the manual and on the equipment itself.
Installation
Proper field wiring and grounding are essential. All field wiring must be performed by qualified personnel following NEC and local electrical codes.
Operation
Before operating, read through the manual thoroughly. Ensure you are wearing proper Personal Protective Equipment (PPE) as described in the manual.
Maintenance
Regular maintenance is crucial for the proper functioning of the air conditioner. Follow the maintenance schedule outlined in the manual.
FAQs
Q: What should I do if I encounter a potentially hazardous situation?
A: If you encounter a hazardous situation, stop immediately and assess the risks. Follow the safety guidelines provided in the manual to address the situation.
Q: How often should maintenance be performed?
A: Maintenance should be performed regularly as per the maintenance schedule provided in the manual. It is essential for the longevity and efficiency of the equipment.
Q: Can I use any refrigerant with this air conditioner?
A: No, this air conditioner specifically uses R-454B refrigerant. Ensure you only use R454B rated service equipment and components to prevent equipment failure.
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Installation, Operation, and Maintenance
IntelliPakTM 2
Commercial Rooftop Air Conditioners
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
May 2025
RT-SVX087C-EN
Introduction
Read this manual thoroughly before operating or servicing this unit.
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.
The three types of advisories are defined as follows:
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION NOTICE
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.
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.
WARNING
Proper Field Wiring and Grounding Required!
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.
WARNING
Personal Protective Equipment (PPE) Required!
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.
©2025 Trane
RT-SVX087C-EN
WARNING
Follow EHS Policies!
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.
WARNING
R-454B Flammable A2L Refrigerant!
Failure to use proper equipment or components as described below could result in equipment failure, and possibly fire, which could result in death, serious injury, or equipment damage. The equipment described in this manual uses R-454B refrigerant which is flammable (A2L). Use ONLY R454B rated service equipment and components. For specific handling concerns with R-454B, contact your local representative.
WARNING
Cancer and Reproductive Harm!
This product can expose you to chemicals including lead and bisphenol A (BPA), 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.
Overview of Manual
Note: This document is customer property and must be retained by the unit owner for use by maintenance personnel.
This unit is equipped with Symbio 800 controls. Refer to the “Start-Up” and “Manual Override” procedures within this Installation, Operation, and Maintenance manual and the latest edition of the appropriate programming manual for Variable Air Volume (VAV), or Single Zone Variable Air Volume (SZVAV) applications before attempting to operate or service this equipment.
Introduction
Important: The procedures discussed in this manual should only be performed by qualified and experienced HVAC technicians.
This booklet describes proper installation, start-up, operation, and maintenance procedures for 90 to 150 ton rooftop air conditioners designed for VAV or SZ VAV applications. By carefully reviewing the information within this manual and following the instructions, the risk of improper operation and/or component damage will be minimized. Note: One copy of the appropriate service literature ships
inside the control panel of each unit. It is important that periodic maintenance be performed to help assure trouble-free operation. Should equipment failure occur, contact a qualified service organization with qualified, experienced HVAC technicians to properly diagnose and repair this equipment. Important: DO NOT release refrigerant to the atmosphere! If adding or removing refrigerant is required, the service technician must comply with all federal, state, and local laws.
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.
Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.
Factory Training
Factory training is available through Trane UniversityTM to help you learn more about the operation and maintenance of your equipment. To learn about available training opportunities, contact Trane UniversityTM.
Online: www.trane.com/traneuniversity
Email: traneuniversity@trane.com
Revision History
· Updated Requirements for Gas Heat Units section.
· Updated Installation gas heat information.
· Updated Supply and Relief/Return Fan Overloads section.
Digit 1 — Unit Type
S = Self-Contained (Packaged Rooftop)
Digit 2 — Unit Function
E = DX Cooling, Electric Heat F = DX Cooling, Natural Gas Heat L = DX Cooling, Hot Water Heat S = DX Cooling, Steam Heat X = DX Cooling, No Heat
Digit 3 — System Type
H = Single Zone
Digit 4 — Development Sequence
T = R-454B
Digit 5, 6, 7 — Nominal Capacity
090 = 90 Ton Air-Cooled 105 = 105 Ton Air-Cooled 120 = 120 Ton Air-Cooled 130 = 130 Ton Air-Cooled 150 = 150 Ton Air-Cooled
Digit 8 — Voltage Selection
4 = 460/60/3 5 = 575/60/3 C = 380/50/3
Digit 9 — Heating Capacity Selection
0 = No Heat 1 = Electric Heat 90/56 kW 60/50 Hz 2 = Electric Heat 140/88 kW 60/50 Hz 3 = Electric Heat 265/166 kW 60/50 Hz 4 = Electric Heat 300/188 kW 60/50 Hz A = Low Gas Heat 2-stage B = Medium Gas Heat 2-stage C = High Gas Heat 2-stage D = Low Gas Heat Modulating E = Medium Gas Heat Modulating F = High Gas Heat Modulating G = Low Heat – 1.0″ (25mm) Valve H = Low Heat – 1.25″ (32mm) Valve J = Low Heat – 1.5″ (38mm) Valve K = Low Heat – 2.0″ (50mm) Valve L = Low Heat – 2.50″ (64mm) Valve M = Low Heat – 3.0″ (76mm) Valve N = High Heat – 1.0″ (25mm) Valve P = High Heat – 1.25″ (32mm) Valve Q = High Heat – 1.5″ (38mm) Valve R = High Heat – 2.0″ (50mm) Valve T = High Heat – 2.50″ (64mm) Valve U = High Heat – 3.0″ (76mm) Valve
Digit 10, 11 — Design Sequence
Digit 12 — Unit Configuration Selection
1 = One-Piece Unit w/o Blank Section 2 = One-Piece Unit w/4′ Blank Section 3 = One-Piece Unit w/8′ Blank Section 4 = Two-Piece Unit w/o Blank Section 5 = Two-Piece Unit w/4′ Blank Section 6 = Two-Piece Unit w/8′ Blank Section
Digit 13 — Supply/Return Airflow Direction
1 = Downflow Supply/Upflow Return 2 = Downflow Supply/Horiz End Return 3 = Downflow Supply/Horiz Right Return 4 = Right Side Horiz Supply/Upflow Return 5 = Right Side Horiz Supply/Horizontal End Return 6 = Right Side Horiz Supply/Horizontal Right Return
Digit 14 — Supply Fan Options
1 = Standard CFM Supply Fan Motor(s) 3 = Standard CFM Supply Fan – TEFC High EFF Motor(s) 4 = Low CFM Supply Fan Motor(s) 6 = Low CFM Supply Fan – TEFC High EFF Motor (s) 7 = Standard CFM Supply Fan – with Internal Shaft Grounding 9 = Standard CFM Supply Fan – TEFC Motor and internal SGR A = Low CFM Supply Fan – with Internal Shaft Grounding C = Low CFM Supply Fan – TEFC Motor and internal SGR D = Standard CFM Fan Motor(s) and Piezometer E = Standard CFM Fan – TEFC Motor(s) and Piezometer F = Standard CFM Fan – ODP with SGR Motor(s) and Piezometer G = Standard CFM Fan – TEFC with SGR Motor(s) and Piezometer H = Low CFM Fan Motor(s) and Piezometer J = Low CFM Fan – TEFC Motor(s) and Piezometer L = Low CFM Fan – ODP with SGR Motor(s) and Piezometer M = Low CFM Fan – TEFC with SGR Motor(s) and Piezometer
Digit 15 — Supply Fan Motor Selection
F = 15 Hp G = 20 Hp H = 25 Hp J = 30 Hp K = 40 Hp L = 50 Hp M = 60 Hp N = 75 Hp P = 100 Hp
Digit 16 — Supply Fan RPM Selection
7 = 700 8 = 800 9 = 900 A = 1000 B = 1100 C = 1200 D = 1300 E = 1400 F = 1500 G = 1600 H = 1700 J = 1800 K = 1900 L = 2000
Digit 17 — Relief/Return Fan Options
0 = None 5 = Std CFM Exhaust with VFD with Bypass 6 = Low CFM Exhaust with VFD with Bypass 7 = Std CFM Exhaust with VFD without Bypass 8 = Low CFM Exhaust with VFD without Bypass C = Std CFM Return with VFD with Bypass D = Low CFM Return with VFD with Bypass E = Std CFM Return with VFD without Bypass F = Low CFM Return with VFD without Bypass G = Std CFM Exhaust with VFD with Bypass and Piezometer H = Low CFM Exhaust with VFD with Bypass and Piezometer J = Std CFM Exhaust with VFD without Bypass and Piezometer K = Low CFM Exhaust with VFD without Bypass and Piezometer L = Std CFM Return with VFD with Bypass and Piezometer M = Low CFM Return with VFD with Bypass and Piezometer N = Std CFM Return with VFD without Bypass and Piezometer P = Low CFM Return with VFD without Bypass and Piezometer
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Model Number Description
Digit 18 — Relief/Return Fan Motor Selection
0 = None D = 7.5 Hp E = 10 Hp F = 15 Hp G = 20 Hp H = 25 Hp J = 30 Hp K = 40 Hp L = 50 Hp M = 60 Hp
Digit 19 — Relief/Return RPM Selection
0 = None 3 = 300 4 = 400 5 = 500 6 = 600 7 = 700 8 = 800 9 = 900 A = 1000 B = 1100 C = 1200 D = 1300 E = 1400
Digit 20 — System Control Selection
4 = VAV (Discharge Temp Control) with VFD Supply 5 = VAV(Discharge Temp Control) with VFD Supply with Bypass 6 = VAV ( Single Zone) with VFD Supply 7 = VAV( Single Zone) with VFD with Bypass
Digit 21 — Fresh Air Options/Controls
A = 0-25% Motorized Damper B = Economizer with Dry Bulb C = Economizer with Reference Enthalpy D = Economizer with Comparative Enthalpy E = Econ with Fresh Air Measure/Dry Bulb F = Econ with Fresh Air Measure/Ref Enthalpy G = Econ with Fresh Air Measure/Comp Enthalpy H = Econ with DCV/Dry Bulb(a) J = Econ with DCV/Ref Enthalpy(a) K = Econ with DCV/Comp Enthalpy(a) L = Econ with Differential Dry Bulb M = Econ with DVC/Differential Dry Bulb(a) N = Econ with Fresh Air Measure/DVC/Differential Dry Bulb(a)
Digit 22 — Damper Option
0 = Standard 1 = Low Leak Damper(s)-AMCA Class 2, 10cfm/ft2 2 = Ultra Low Leak Damper(s)-AMCA Class 1, 4cfm/ft2 3 = Ultra Low Leak, AMCA 1A, Title 24
Digit 23– Pre-Evaporator Coil Filter Selection 0 = Pre-Evap Filters-MERV 8, High Efff Filters 1 = Pre-Evap Filters-2″ Rack/Less Filters 2 = Pre-Evap Filters-MERV 15 Bag Filters w/ Prefilters 3 = Pre-Evap Filters – Bag Filter Rack/Less Filters 4 = Pre-Evap Filters – MERV 14 Cartridge Filters w/ Prefilters 5 = Pre-Evap Filters – Cartridge Rack/Less Filters 6 = Pre-Evap Filters – MERV 14 Low PD Cartridge w/Prefilters 7 = Pre-Evap Filters – Low PD Cartridge Rack/Less Filters
Digit 24 — Blank Section Application Options 0 = None A = Final MERV 15 Bag Filters with Prefilters B = Final MERV 14 Low PD Cartridge Filters with Prefilters C = Final MERV 14 , Cartridge Filters with Prefilters D = Final MERV 14 High Temp Cartridge Filters with Prefilters E = Final MERV 17 HEPA Filters with Prefilters F = Final MERV 17 High Temp HEPA Filters with Prefilters
Digit 25 — Energy Recovery Wheel
0 = None 1 = Low CFM ERW with Bypass Defrost 2 = Standard CFM ERW with Bypass Defrost
Digit 26 — Unit Mounted Power Connection Selection A = Terminal Block B = Non-Fused Disconnect C = Non-Fused Disconnect with Powered Convenience Outlet D = Unit Disconnect Switch with High Fault SCCR E = Unit Disconnect Switch with High Fault SCCR/ Powered Convenience Outlet
Digit 27 — Condenser Coil Selection
0 = All Aluminum Air-Cooled Condenser Coil J = Corrosion Protected Condenser Coil
Digit 28 — Efficiency, Capacity, and Drain Pan Option A = Standard Evap Coil with Stainless Steel Drain Pan C = High Cap Evap Coil with Stainless Steel Drain Pan W = eFlexTM with Std Evap Coil with SS Drain Pan Z = eFlexTM with Hi Cap Evap Coil with SS Drain Pan
Digit 29 — Refrigeration System A
0 = Standard A = Suction Service Valves B = Replaceable Core Liquid Filter Driers C = Suction Service Valves and Replaceable Core Liquid Filter Driers
Digit 30 — Refrigeration System B
0 = Standard 1 = Modulating Hot Gas Reheat 2 = Hot Gas Bypass 3 = Modulating Hot Gas Reheat/Hot Gas By-Pass
Digit 31 — Ambient Control Option
0 = Standard Ambient 1 = Low Ambient
Digit 32 — Controls
0 = None 1 = Expansion Module 2 = Power Meter 3 = Expansion Module with Power Meter
Digit 33 — Controls (continued)
0 = None 3 = Rapid Restart 4 = Filter Monitoring 5 = Rapid Restart with Filter Monitoring
(a) Requires CO2 Sensor(s).
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Digit 34 — Module Options
0 = None 1 = Modbus® 2 = Modbus and Ventilation Override 3 = Air-Fi® 4 = AirFi and Ventilation Override D = Ventilation Override F = LonTalk® L = LonTalk and Ventilation Override M = BACnet® N = BACnet and Ventilation Override W = BACnet with AirFi Z = BACnet Interface and Ventilation Override
Digit 35 — Zone Sensor Option
0 = No Accessory Panel A = BAYSENS108 – Dual Setpoint with Man/Auto Changover C = BAYSENS073 – Room Sensor with Timed Override and Cancel D = BAYSENS074 – Room Snsr with TO and Cancel and Local Stpt Adj M = BAYSENS800 – Programmable Zone Sensor
Digit 36 — Agency Approval Option
0 = None 1 = cULus
Digit 37 — Service Enhancements
0 = Single Side Access Door A = Dual Side Access Door B = Single Side Access Doors/ Marine Lights C = Dual Side Access Doors/ Marine Lights
Digit 38 — Miscellaneous Options
0 = None 1 = Belt Guards 2 = Burglar Bars 3 = Belt Guards/Burglar Bars 4 = Isolation Damper Control 5 = Belt Guards/Isolation Damper Control 6 = Burglar Bars/Isolation Damper Control 7 = Belt Guards/Burglar Bars/Isolation Damper Control
Model Number Description
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General Information
Unit Nameplate
One Mylar unit nameplate is located on the outside of enclosure. It includes the unit model number, serial number, electrical characteristics, refrigerant charge, unit wiring diagram numbers, as well as other pertinent unit data. A small metal nameplate with the Model Number, Serial Number, and Unit Weight is located just above the Mylar nameplate, and a third nameplate is located on the inside of the control panel door.
Compressor Nameplate
The Nameplate for the Scroll Compressor is located on the compressor lower housing. Max amps is listed on the nameplate and is the absolute highest amp load on the compressor at any operating condition (does not include locked rotor amps or inrush). This value should never be exceeded.
Gas Heat Nameplate
The nameplate for the Gas Heater is located on the inside of the gas heat enclosure. Allowable operating values of Min and Max input rate, manifold pressure, and air temperature rise for the heater is listed on the nameplate.
Unit Description
Table 1. Available tonnages
Air Cooled Tonnages
90
105
120
130
150
Each one-piece rooftop air conditioner ships fully assembled from the factory. An optional roof curb, specifically designed for the S_HT units is available from Trane. The roof curb kit must be field assembled and installed according to the latest edition of the roof curb installation manual.
Trane Commercial Rooftop Units are controlled by a SymbioTM 800 control system that consists of a network of modules and are referred to as Low Level Intelligent Devices (LLID). The acronym (LLID) is used extensively throughout this document when referring to the control system network. These modules through Proportional/ Integral control algorithms perform specific unit functions which provide the best possible comfort level for the customer.
They are mounted in the control panel and are factory wired to their respective internal components. They receive
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and interpret information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request for economizing, mechanical cooling, heating, and ventilation. Refer to the following discussion for an explanation of each module function. Note: The SymbioTM 800 coin cell tray should never be
taken out unless the Symbio 800 is powered on or the Symbio 800 needs to be powered on shortly after replacing the battery. Failure to do this may shorten the battery life.
Ventilation Override Module
The Ventilation Override module initiates specified functions such as; space pressurization, exhaust, purge, purge with duct pressure control, and unit off when any one of the five (5) binary inputs to the module are activated. The compressors and condenser fans are disabled during the ventilation operation. If more than one ventilation sequence is activated, the one with the highest priority is initiated.
High Pressure Limit Controls
High Pressure controls are located on the discharge lines near the scroll compressors. They are designed to open when the discharge pressure approaches 600 ± 10 psig. The controls reset automatically when the discharge pressure decreases to approximately 460 ± 20 psig. However, the compressors on that circuit are locked out and a manual reset diagnostic is initiated after the fourth occurrence of a high pressure condition.
Morning Warm-Up–Zone Heat
When a system changes from an unoccupied to an occupied mode, or switches from STOPPED to AUTO, or power is applied to a unit with the MWU option, the heater in the unit or external heat will be brought on if the space temperature is below the MWU setpoint. The heat will remain on until the temperature reaches the MWU setpoint.
If the unit is VAV, then the VAV box/unocc relay will continue to stay in the unoccupied position and the VFD output will stay at 100% during the MWU mode. When the MWU setpoint is reached and the heat mode is terminated, then the VAV box/unocc relay will switch to the occupied mode and the VFD output will be controlled by the duct static pressure. During Full Capacity MWU the economizer damper is held closed for as long as it takes to reach setpoint. During Cycling Capacity MWU the economizer damper is allowed to go to minimum position after one hour of operation if setpoint has not been reached.
Compressor Motor Winding Thermostats
A thermostat is embedded in the motor windings of each Scroll compressor. Each thermostat is designed to open if the motor windings exceed approximately 221°F. The thermostat will reset automatically when the winding temperature decreases to approximately 181°F. Rapid
RT-SVX087C-EN
cycling, loss of charge, abnormally high suction temperatures, or the compressor running backwards could cause the thermostat to open. During a request for compressor operation, if the Compressor Module detects a problem outside of normal parameters, it turns any operating compressor(s) on that circuit “Off”, locks out all compressor operation for that circuit, and initiates a manual reset diagnostic (compressor trip). These compressors
General Information
come equipped with a protection module that monitors phase loss, phase sequencing and motor temperature.
VZH Variable Speed Compressors
Over current and over torque protection for VZH compressors are provided by the TRV200 inverter. VZH over temperature protection is not required.
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Pre-Installation
Unit Inspection
To protect against loss due to damage incurred in transit, perform inspection immediately upon receipt of the unit.
Exterior Inspection
If the job site inspection reveals damage or material shortages, file a claim with the carrier immediately. Specify the type and extent of the damage on the bill of lading before signing. Notify the appropriate sales representative. Important: Do not proceed with installation of a damaged
unit without sales representative’s approval.
· Visually inspect the complete exterior for signs of shipping damages to unit or packing material.
· Verify that the nameplate data matches the sales order and bill of lading.
· Verify that the unit is properly equipped and there are no material shortages.
· Verify that the power supply complies with the unit nameplate and electric heater specifications.
Inspection for Concealed Damage
Visually inspect the components for concealed damage as soon as possible after delivery and before it is stored.
Do NOT walk on the sheet metal base pans. Bridging between the unit’s main supports may consist of multiple 2 by 12 boards or sheet metal grating.
WARNING
No Step Surface!
Failure to follow instruction below could result in death or serious injury. Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the supporting metal to collapse and result in the operator/technician falling.
If concealed damage is discovered:
· Notify the carrier’s terminal of the damage immediately by phone and by mail.
· Concealed damage must be reported within 15 days.
· Request an immediate, joint inspection of the damage with the carrier and consignee.
· Stop unpacking the unit.
· Do not remove damaged material from receiving location.
· Take photos of the damage, if possible.
· The owner must provide reasonable evidence that the damage did not occur after delivery.
Repair
Notify the appropriate sales representative before arranging unit installation or repair. Important: Do not repair unit until the damage has been
inspected by the carrier’s representative.
Storage
Store unit in a level and dry location. Use adequate blocking under the base rail. If unit is not level and supported adequately, damage may occur when removing screws and opening doors.
Take precautions to prevent condensate formation inside the unit electrical components and motors when:
· The unit is stored before it is installed; or,
· The unit is set on the roof curb and temporary auxiliary heat is provided in the building.
Isolate all side panel service entrances and base pan openings (e.g., conduit holes, S/A and R/A openings, and flue openings) to minimize ambient air from entering the unit until it is ready for startup. Note: Do not use the unit heater as temporary heat without
completing the startup procedures detailed under Startup information.
The manufacturer will not assume responsibility for equipment damage resulting from accumulation of condensate on the unit electrical and/or mechanical components.
Unit Clearances
Minimum Required Clearance (see Dimensional Data chapter) illustrates the minimum operating and service clearances for either a single or multiple unit installation.
These clearances are the minimum distances necessary for adequate service, cataloged unit capacity, and peak operating efficiency. Providing less than the recommended clearances may result in condenser coil starvation, “shortcirculating” of relief and economizer airflows, or recirculation of hot condenser air.
Unit Dimensions and Weight Information
Description
Reference
Air-Cooled Condenser
One-piece unit dimensions
See “Dimensional Data,” p. 15
Two-piece unit dimensions
See “Dimensional Data,” p. 15
Roof curb weights
See “,”
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Installation Checklist
General Checklist (Applies to all units)
The checklist listed below is a summary of the steps required to successfully install a Commercial rooftop unit. This checklist is intended to acquaint the installing personnel with what is required in the installation process. It does not replace the detailed instructions called out in the applicable sections of this manual. Important: This checklist does not replace the detailed
instructions called out in the applicable sections of this manual.
Unit checked for shipping damage and material shortage.
Verify that the installation location of the unit will provide the required clearance for proper operation.
Roof curb assembled and installed.
Roof curb level and square.
Ductwork secured to curb, or unit.
Corners of duct adapters sealed on units with horizontal supply or return.
Horizontal supply or return ductwork is self supporting.
Pitch pocket installed for units with power supply through building roof.
Unit set on curb and checked level.
Unit-to-curb seal checked to ensure it is tight and without buckles or cracks.
For 120-150 T units remove foam shipping blocks from evaporator suction headers to allow proper condensate drainage.
Condensate drain lines installed to each evaporator drain connection.
Verify that all access doors open 100% and are not obstructed by drain lines etc.
Shipping hardware removed from each compressor assembly.
Shipping hold-down bolts and shipping channels removed from the supply and relief/return fans with spring isolators.
Supply and relief/return fans spring isolators checked for proper adjustment.
Plastic coverings (paint shields) removed from all compressors (if present).
Verify all discharge and suction line service valves are back seated.
Compressor crankcase heaters energized for a minimum of 12 hours prior to unit refrigeration system start-up.
Verify that unit literature (IOM, PTG) are left inside control box for start-up.
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Pre-Installation
Unit Rigging and Placement (Two-piece –addition to General Checklist)
First, rig and set the low side unit on the roof curb (aligned with return end).
Remove the rail connector splice brackets and install the brackets on the low side unit base rails.
Take off the side panels (these are labeled) and the top cover of the high side unit and set aside to be assembled later.
Rig and set the high side unit on roof curb pedestal.
Lift the unit and position it over the pedestal.
Use the rail splice bracket as an alignment aid to connect the Low and high side units. The Low and high side unit rails should be butted together with a maximum 2″ (preferably 1″) separation.
Remove the left upper and lower louvered panels of the high side unit as well as the corner panels on each side to aid in tubing and wiring connections.
Close refrigeration shut off valves as indicated in this manual–Liquid, discharge, hot gas bypass (if present), and hot gas reheat (if present).
For 2 piece Air-Cooled condensers add field charge per nameplate.
Braze refrigerant piping connections and leak test.
Low side and high side evacuated to 500 microns.
Standing vacuum does not rise over 200 microns in 15 minutes.
Open service valves to allow refrigerant flow.
Refrigerant released from discharge to suction until suction pressure is approximately 60 PSIG.
Power wires connected in connection box.
Control wires connected in connection box.
Seal air gaps around wiring and refrigerant tubing through bulkhead.
Side panels and top cover assembled between high and low side.
Verify line dampening weights are installed on each discharge line.
Electric Heat Units
Inspect the heater junction box and control panel; tighten any loose connections.
Check electric heat circuits for continuity.
Two piece units only: Route power wiring to high side junction box.
Main Electrical Power Requirements
Verify that the power supply to the unit complies with the unit nameplate specification. Refer to Main Unit Power Wiring in the Installation chapter.
Properly ground the unit.
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Pre-Installation
Inspect all control panel components and tighten any loose connections.
Connect properly sized and protected power supply wiring to a field supplied/installed disconnect and the unit (copper wiring only to the unit).
Verify that phasing to the unit is correct (ABC).
Turn the 1S1 fused switch inside the control panel off to prevent accidental unit operation. Turn the 1S20 fused switch inside the control panel on to power the crankcase heaters.
Turn on power to the unit.
Verify that the controls remain powered off.
Verify that all compressor crankcase heaters are energized for at least eight hours prior to unit start-up.
Important: All field-installed wiring must comply with NEC and applicable local codes.
Requirements for Gas Heat Units
Gas supply line properly sized and connected to the unit gas train.
Properly sized main gas regulator installed to regulate pressure from supply.
All gas piping joints properly sealed.
Drip leg installed in the gas piping near the unit.
Gas piping leak checked with a soap solution. If piping connections to the unit are complete, do not pressurize piping in excess of 0.50 psig or 14inch W.C. to prevent component failure.
Main supply gas pressure between 7inches and 14 inches W.C..
Flue Tubes clear of any obstructions.
Factory-supplied flue assembly installed on the unit.
Connect the 3/4″ CPVC furnace drain stub-out to a proper condensate drain.
Install field provided heat tape to furnace drain line.
Hot Water Heat
Route properly sized water piping through the base of the unit into the heating section.
Install the factory-supplied, 3-way modulating valve.
Complete the valve actuator wiring.
Steam Heat
Route properly sized steam piping through the base of the unit into the heating section.
Install the factory-supplied, 2-way modulating valve.
Complete the valve actuator wiring.
Install 1/2″, 15-degree swing check vacuum breaker(s) at the top of each coil section. Vent breaker(s) to the atmosphere or merge with return main at discharge side of steam trap.
Position the steam trap discharge at least 12″ below the outlet connection on the coil.
Use float and thermostatic traps in the system, as required by the application.
O/A Pressure Sensor and Tubing Installation
O/A pressure sensor mounted to the roof bracket.
Factory supplied pneumatic tubing installed between the O/A pressure sensor and the connector on the base rail.
(Units with Relief/Return fans)Field supplied pneumatic tubing connected to the proper fitting on the space pressure transducer located in the return control panel, and the other end routed to a suitable sensing location within the controlled space.
Energy Recovery Wheel
Verify that the wheel turns freely though a full rotation.
Confirm that all wheel segments are fully engaged in the wheel frame and that the segment retainers are completely fastened.
Confirm the seal adjustment and proper belt tracking on the wheel rim.
14
RT-SVX087C-EN
Dimensional Data
Figure 1. Unit top/left view
Detail A
1-1/4 NPT. DRAIN 2X TYP. LEFT & RIGHT SIDES OF UNIT
Table 2. Unit dimensions (in.)–ONE-PIECE unit –WITHOUT energy recovery wheel
Tons 90 105
Blank Section
None 4 ft 8 ft
None 4 ft 8 ft
Unit Dimensions
A
B
437 3/16 159 15/16
485 6/16 159 15/16
533 9/16 159 15/16
455 3/16 159 15/16
503 6/16 159 15/16
551 9/16 159 15/16
Lifting Lug Locations
Air Handler Side
Condenser Side
C1
C2
C3
D1
66 252 14/16 N/A 27 11/16
66 252 14/16 N/A 54 2/16
66 252 14/16 N/A 54 2/16
66 252 14/16 N/A 27 11/16
66 252 14/16 N/A 54 2/16
66 252 14/16 N/A 54 2/16
Unit Width
M
N
139 13/16 139 13/16 139 13/16 139 13/16 139 13/16 139 13/16
143 8/16 143 8/16 143 8/16 143 8/16 143 8/16 143 8/16
Unit Height
O
P
R
103 12/16 97 9/16 103 7/16
103 12/16 97 9/16 103 7/16
Return Fan J
29 3/16
29 3/16
Exhaust Fan K
17
17
120-150
(a)
None
528 15/16
197 1/16
66
269 6/16 N/A
63 2/16
139 13/16 143 8/16
—
—
—
—
—
RT-SVX087C-EN
15
Dimensional Data
Table 2. Unit dimensions (in.)–ONE-PIECE unit –WITHOUT energy recovery wheel (continued)
Tons
Blank Section
Unit Dimensions
A
B
Lifting Lug Locations
Air Handler Side
Condenser Side
C1
C2
C3
D1
Unit Width
M
N
Unit Height
O
P
R
120-150
(a)
4 ft
577 2/16 197 1/16 66 269 6/16 N/A 63 2/16
139 13/16 143 8/16
—
—
—
Return Exhaust
Fan
Fan
J
K
—
—
120-150
(b)
None
540 15/16
197 1/16
66
269 6/16 N/A
63 2/16
139 13/16 143 8/16
—
—
—
—
—
(a) All units except high heat gas models (b) High heat gas models only
Table 3. Unit dimensions (in.)–ONE-PIECE unit –WITH energy recovery wheel
Tons
Blank Section
90 None
90
4 ft
105 None
105
4 ft
Tons
Blank Section
Unit Dimensions
Lifting Lug Locations
A
B
Air Handler Side
Condenser Side
C1
C2
C3
D1
533 9/16 256 5/16 66 201 1/16 349 4/16
581 13/16 256 5/16 66 201 1/16 349 4/16
551 9/16 256 5/16 66 201 1/16 349 4/16
599 13/16 256 5/16 66 201 1/16 349 4/16
Return Exhaust
Fan
Fan
27 11/16 54 2/16 27 11/16 54 2/16
J
K
90 None
N/A
17
90
4 ft
N/A
17
105 None
N/A
17
105
4 ft
N/A
17
Unit Width
Unit Height
M
N
O
P
R
139 13/16 139 13/16 139 13/16 139 13/16
143 8/16 143 8/16 143 8/16 143 8/16
103 12/16 103 12/16 103 12/16 103 12/16
97 9/16 97 9/16 97 9/16 97 9/16
103 7/16 103 7/16 103 7/16 103 7/16
Table 4. Unit dimensions (in.)–TWO-PIECE unit –WITHOUT energy recovery wheel
Unit Dimensions
Tons
Blank Section
A
B
E
F
90
105
120-150 (a)
120-150 (a)
120-150 (a)
120-150
(a)
None 4 ft 8 ft
None 4 ft 8 ft
None
4 ft
8 ft
None
454 4/16 502 7/16 550 11/16 472 4/16 520 7/16 568 11/16
546
159 15/16 159 15/16 159 15/16 159 15/16 159 15/16 159 15/16 197 1/16
330 14/16 379 1/16 427 4/16 330 14/16 379 1/16 427 4/16 395 10/16
594 4/16 197 1/16 443 13/16
642 7/16 197 1/16 492 1/16
558
197 1/16 407 10/16
121 6/16 121 6/16 121 6/16 139 6/16 139 6/16 139 6/16 148 6/16
148 6/16
148 6/16
148 6/16
Lifting Lug Locations
Lug Locations
Air Handler Side
Condenser Side
C1
C2
C3
C4 D1
D2
66 252 14/16
N/A
N/A 16
66 252 14/16 368 6/16 N/A 16
112 7/16 112 7/16
66 252 14/16 416 10/16 N/A 16
66 252 14/16
N/A
N/A 16
66 252 14/16 368 6/16 N/A 16
66 252 14/16 416 10/16 N/A 16
112 7/16 130 7/16 130 7/16 130 7/16
66 269 6/16 384 15/16 N/A 16 139 7/16
66 269 6/16 433 2/16 N/A 16 139 7/16 66 269 6/16 481 6/16 N/A 16 139 7/16
66 269 6/16 396 15/16 N/A 16 139 7/16
16
RT-SVX087C-EN
Dimensional Data
Table 4. Unit dimensions (in.)–TWO-PIECE unit –WITHOUT energy recovery wheel (continued)
Tons
Blank Section
Unit Width
M
N
Unit Height
O
P
R
Return Fan
J
Exhaust Fan
K
None 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
90
4 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
8 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
None 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
105
4 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
8 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16 29 3/16
17
120-150 (a)
None
139 13/16 143 8/16 103 12/16
97 9/16
103 7/16
29 3/16
17
120-150 (a)
4 ft
139 13/16 143 8/16 103 12/16 97 9/16
103 7/16
29 3/16
17
120-150 (a)
8 ft
139 13/16 143 8/16 103 12/16 97 9/16
103 7/16
29 3/16
17
120-150
(b)
None
139 13/16 143 8/16 103 12/16
97 9/16
103 7/16
29 3/16
17
(a) High Heat Gas Models Only (b) High Heat Gas Models Only
Table 5. Unit dimensions (in.)–TWO-PIECE unit –WITH energy recovery wheel
Tons
Blank Section
A
Unit Dimensions
B
E
Lifting Lug Locations
Lug Locations
Air Handler Side
Condenser Side
F
C1
C2
C3
C4
D1
D2
None 550 11/16 256 5/16 427 5/16 121 6/16 66 201 1/16 349 4/16
N/A
16 112 7/16
90
4 ft 598 14/16 256 5/16 475 8/16 121 6/16 66 201 1/16 349 4/16 464 13/16 16 112 7/16
8 ft
647 2/16 256 5/16 523 12/16 121 6/16 66 201 1/16 349 4/16
513
16 112 7/16
None 568 11/16 256 5/16 427 5/16 139 6/16 66 201 1/16 349 4/16
N/A
16 130 7/16
105
4 ft 616 14/16 256 5/16 475 8/16 139 6/16 66 201 1/16 349 4/16 464 13/16 16 130 7/16
8 ft
665 2/16 256 5/16 523 12/16 139 6/16 66 201 1/16 349 4/16
513
16
120150(a)
None
642 7/16
293 8/16 492 1/16
148 6/16
66
238 5/16
365 5/16 480 14/16 16
120150(a)
4 ft
690 10/16 293 8/16 540 4/16 148 6/16 66 238 5/16 365 5/16 529 2/16 16
120150(a)
8 ft
738 14/16 293 8/16 588 8/16 148 6/16 66 238 5/16 365 5/16 577 5/16 16
120150(a)
None
654 7/16 293 8/16 504 1/16 148 6/16
66
238 5/16 365 5/16 492 14/16 16
Tons
Blank Section
Unit Width
M
N
Unit Height
O
P
R
Return Fan
J
Exhaust Fan
K
130 7/16 139 7/16 139 7/16 139 7/16 139 7/16
None 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
90
4 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
8 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
None 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
105
4 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
8 ft 139 13/16 143 8/16 103 12/16 97 9/16 103 7/16
N/A
17
120150(a)
None
139 13/16 143 8/16 103 12/16
97 9/16
103 7/16
N/A
17
120150(a)
4 ft
139 13/16 143 8/16 103 12/16 97 9/16
103 7/16
N/A
17
120150(a)
8 ft
139 13/16 143 8/16 103 12/16 97 9/16
103 7/16
N/A
17
120150(b)
None
139 13/16 143 8/16 103 12/16
97 9/16
103 7/16
N/A
17
(a) High Heat Gas Models Only (b) High Heat Gas Models Only
RT-SVX087C-EN
17
Dimensional Data
Table 6. Downflow/horizontal airflow configuration dimensions (in.) without energy recovery wheel (ERW)
Tonnage 90-105 120-150 90-105 120-150
Tonnage 90-105 120-150 90-105 120-150
Tonnage 90-105 120-150 90-105 120-150
DOWNFLOW Opening Dimensions
Blank Section
Gas Heat
Return Opening-with or without Releif Fan
Return Opening-with Return Fan
X1
Y1
W1
L1
X1
Y1
W1
L1
None
None 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
4 ft
None 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
8 ft
None 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
None
None 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
4 ft
None 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
8 ft None
8 ft None
None
Low/Med/ High
Low/Med/ High
Low/Med
14 13/16 14 13/16 14 13/16 14 13/16
8 14/16 8 14/16 8 14/16 8 14/16
48 3/16 48 3/16 48 3/16 48 3/16
121 15/16 121 15/16 121 15/16 121 15/16
14 13/16 14 13/16 14 13/16 14 13/16
42 14/16 42 14/16 42 14/16 42 14/16
48 3/16 48 3/16 48 3/16 48 3/16
53 14/16 53 14/16 53 14/16 53 14/16
8 ft Low/Med 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
None
High 14 13/16 8 14/16 48 3/16 121 15/16 14 13/16 42 14/16 48 3/16 53 14/16
Blank Section
Gas Heat
DOWNFLOW Opening Dimensions
Supply Opening
X2
Y2
W2
L2
HORIZONTAL Opening Dimensions
Return Side Opening
X3
Y3
W3
H1
None
None 256 1/16 13 47 14/16 102 8/16 9 5/16 10 10/16 54 12/16 84 15/16
4 ft
None 304 4/16 13 47 14/16 102 8/16 9 5/16 10 10/16 54 12/16 84 15/16
8 ft
None 352 8/16 13 47 14/16 102 8/16 9 5/16 10 10/16 54 12/16 84 15/16
None
None 320 13/16 13 47 14/16 102 8/16
—
—
—
—
4 ft
None
369
13 47 14/16 102 8/16
—
—
—
—
8 ft None
8 ft None
None 417 3/16 13
Low/Med/ High
256 1/16
13
Low/Med/ High
352 8/16
13
Low/Med 320 13/16 13
47 14/16 47 14/16 47 14/16 47 14/16
102 8/16 102 8/16 102 8/16 102 8/16
9 5/16 9 5/16 9 5/16 9 5/16
10 10/16 10 10/16 10 10/16 10 10/16
54 12/16 54 12/16 54 12/16 54 12/16
84 15/16 84 15/16 84 15/16 84 15/16
8 ft Low/Med 417 3/16 13 47 14/16 102 8/16 9 5/16 10 10/16 54 12/16 84 15/16
None
High 320 13/16 13 59 14/16 102 8/16 9 5/16 10 10/16 54 12/16 84 15/16
HORIZONTAL Opening Dimensions
Blank Section
Gas Heat
Return End Opening
Supply Opening
Y1
Y3
H3
L1
X4
Y4
W4
H2
None
None
6 5/16 8 3/16 35 3/16 127 2/16 254 12/16 10 10/16 54 12/16 84 15/16
4 ft
None
6 5/16 8 3/16 35 3/16 127 2/16 302 15/16 10 10/16 54 12/16 84 15/16
8 ft
None
6 5/16 8 3/16 35 3/16 127 2/16 351 2/16 10 10/16 54 12/16 84 15/16
None
None
—
—
—
—
319 8/16 10 10/16 54 12/16 84 15/16
4 ft
None
—
—
—
—
367 11/16 10 10/16 54 12/16 84 15/16
8 ft None
8 ft None
None
Low/Med/ High
Low/Med/ High
Low/Med
6 5/16 6 5/16 6 5/16 6 5/16
8 3/16 8 3/16 8 3/16 8 3/16
35 3/16 35 3/16 35 3/16 35 3/16
127 2/16 127 2/16
415 15/16 254 12/16
10 10/16 10 10/16
127 2/16 127 2/16
351 2/16 319 8/16
10 10/16 10 10/16
54 12/16 54 12/16 54 12/16 54 12/16
84 15/16 66 11/16 84 15/16 66 11/16
8 ft Low/Med 6 5/16 8 3/16 35 3/16 127 2/16 415 15/16 10 10/16 54 12/16 84 15/16
None
High
6 5/16 8 3/16 35 3/16 127 2/16 319 8/16 10 10/16 66 12/16 66 11/16
18
RT-SVX087C-EN
Dimensional Data
Table 7. Downflow/horizontal airflow configuration dimensions (in.) with energy recovery wheel
DOWNFLOW Opening Dimensions
Tonnage
Blank Section
Gas Heat
Return Opening-with or without Relief Return Opening-
Fan
with Return Fan
Supply Opening
X1
Y1
W1
L1
X1 Y1 W1 L1
X2
Y2 W2
L2
None
None 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 352 8/16 13 47 14/16 102 8/16
90-105
4 ft
None 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 400 11/16 13 47 14/16 102 8/16
8 ft
None 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 448 15/16 13 47 14/16 102 8/16
None
None 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 417 4/16 13 47 14/16 102 8/16
120-150
4 ft
None 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 465 7/16 13 47 14/16 102 8/16
90-105
8 ft None
8 ft None
None
Low/Med/ High
Low/Med/ High
Low/Med
82 3/16 82 3/16 82 3/16 82 3/16
8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 513 10/16 13 47 14/16 102 8/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 352 8/16 13 47 14/16 102 8/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 448 15/16 13 47 14/16 102 8/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 417 4/16 13 47 14/16 102 8/16
120-150
8 ft Low/Med 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 513 10/16 13 47 14/16 102 8/16
None
High 82 3/16 8 14/16 49 10/16 121 15/16 N/A N/A N/A N/A 417 4/16 13 59 14/16 102 8/16
HORIZONTAL Opening Dimensions
Tonnage
Blank Section
Gas Heat
Return Side Opening
Supply Opening
X3
Y3
W3
H1
X4
Y4
W4
H2
None
None 71 8/16 10 10/16 54 12/16 43 6/16 351 3/16 10 10/16 54 12/16 84 15/16
90-105
4 ft
None 71 8/16 10 10/16 54 12/16 43 6/16 399 6/16 10 10/16 54 12/16 84 15/16
8 ft
None 71 8/16 10 10/16 54 12/16 43 6/16 447 10/16 10 10/16 54 12/16 84 15/16
None
None 71 8/16 10 10/16 54 12/16 43 6/16 415 15/16 10 10/16 54 12/16 84 15/16
120-150
4 ft
None 71 8/16 10 10/16 54 12/16 43 6/16 464 2/16 10 10/16 54 12/16 84 15/16
90-105
8 ft None
8 ft None
None 71 8/16
Low/Med/
High Low/Med/
High
71 8/16 71 8/16
Low/Med 71 8/16
10 10/16 10 10/16 10 10/16 10 10/16
54 12/16 54 12/16 54 12/16 54 12/16
43 6/16 43 6/16 43 6/16 43 6/16
512 6/16 351 3/16 447 10/16 415 15/16
10 10/16 10 10/16 10 10/16 10 10/16
54 12/16 54 12/16 54 12/16 54 12/16
84 15/16 66 11/16 84 15/16 66 11/16
120-150
8 ft Low/Med 71 8/16 10 10/16 54 12/16 43 6/16 512 6/16 10 10/16 54 12/16 84 15/16
None
High 71 8/16 10 10/16 54 12/16 43 6/16 415 15/16 10 10/16 66 12/16 66 11/16
Notes: 1. On horizontal return with ERW units, the return end opening can be on the front, rear, or both sides of the unit and must be specified. 2. ERW is not allowed w/ end return
RT-SVX087C-EN
19
Dimensional Data
Electrical Entry Details
Figure 2. Electrical entry details/bottom view
16
311161
6034
Outside edge of base rail
Bottom View
8141 7641 61734114
531161 5158 48116 46116
44
ScuesrvtoicmeelirgshutspplieØd 78
power service entrance
Ø358
Unit power
Ø121
5156 6156
Ø1116
External customer connection points
20
RT-SVX087C-EN
Minimum Required Clearance
Figure 3. Minimum required clearance
Dimensional Data
AH R
Cond R
Outside Air
Fltr (R)
Option
Evp (R)
Option
Exh
Blank Section
Fnl Fltr
As Req.
Condenser
Relief
VFD RBox
Filters
Rtn/Rlf Mtr
As Req.
As Req.
Rtn/Rlf
Outside
VFD
Air
RBox
Std
AH L
Fltr (F)
Std
Final Filters
VFD
Heat
Evp (F)
Std
Sup Sup Mtr VFD
Std
Std
Heat L&R
As Req.
Fnl Fltr
As Req.
Note: Unit drawing is representative only and may not accurately depict all models.
Ctrl Box L&R Std
Condenser
CBox Cond L
Table 8. Minimum required clearance
Door Location
Relief/Ret Motor Relief/Ret VFD and Return Control Panel ERW Fltr (L & R) (F) ERW Fltr(a) (L & R) (R) Filter (Front) Filter (Rear) Evap (Front) Evap (Rear) or Evap (Rear) Supply Motor Supply VFD Heat (Left & Right) Final Filter (Front) Final Filter (Rear) Control Box (L & R)
Availability
Std As Req. Option Option
Std Option
Std Std Option Std As Req. As Req. As Req. As Req. Std
Standard
90-105
2′ 2″ * * *
2′ 8″ *
2′ 2″ 2′ 8″
* 2′ 8″
* * * * 3′ 2″
120150
2′ 2″
*
* * 2′ 8″ * 2′ 2″ * * 2′ 8″ * * * * 3′ 2″
Unit Option Selection (Door Swing Ft. and In.)
VFD
Return/ Relief
Supply
Heat
Electric/ Hot Water/
Steam
Two-side Access
Reheat
90-105
120150
*
*
*
*
*
*
2′ 2″
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
2′ 2″ 2′ 8″
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
2′ 2
*
2′ 2″
*
*
*
*
*
*
*
2′ 2″
*
*
*
*
*
*
2′ 2″
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Final Filter
* * * * * * * * * * * * 2′ 2″ 2′ 2″ *
Energy Recovery
2′ 2″ 2′ 2″
Minimum Required Clearance (Ft.)
AH_L AH_R
8′
8′
Control
Exh Cond_L Cond_R
Box
8′
8′
8′
6′
Note: See Unit Dimensions for Energy Recovery Wheel location.
RT-SVX087C-EN
21
Weights
Table 9. Approximate operating weights (lbs.)
Nominal Tons
Air-Cooled Units Unit (Minimum)
Roof Curb (Minimum)
90
14973
907
105
16411
907
120
18447
1040
130
18467
1040
150
19176
1040
Notes:
1. Weights shown include the following features: No heat, standard evap capacity coils, fixed speed
compressors, 0-25% outside air, 2-inch throwaway filters, low CFM supply fan, minimum supply motor
sizes, no return or exhaust fan.
2. Weights shown represent approximate minimum operating weights. To calculate weight for a specific
unit configuration, utilize TOPSS or contact the local Trane sales representative. Weight outputs have
a + 10% accuracy. ACTUAL WEIGHTS ARE STAMPED ON THE UNIT NAMEPLATE.
Table 10. Component weights
Compressor Assy. – Fixed capacity compressors Compressor Assy. – eFlexTM Variable speed Air-Cooled Condensing Coil (Al) Evap Coil – Std. Cap Evap Coil – Hi. Cap. Reheat Coil and Tubing Replaceable Core Filter Driers HGBP
Supply Fan and Fan Board Assy. – Low CFM Supply Fan and Fan Board Assy. – Std. CFM Belt Guard Supply VFD (50 hp and below) Supply VFD (60-100 hp) Supply Fan Motor – 15 hp Supply Fan Motor – 20 hp Supply Fan Motor – 25 hp Supply Fan Motor – 30 hp Supply Fan Motor – 40 hp Supply Fan Motor – 50 hp Supply Fan Motor – 60 hp Supply Fan Motor – 75 hp Supply Fan Motor – 100 hp
Return Fan and Dampers – Low CFM Return Fan and Dampers – Std. CFM Exhaust Fan and Dampers – Low CFM Exhaust Fan and Dampers – Std. CFM Belt Guard Exhaust / Return VFD (50 hp and below) Exhaust / Return VFD (60-100 hp) Exh / Rtn Fan Motor – 7.5 hp Exh / Rtn Fan Motor – 10 hp Exh / Rtn Fan Motor – 15 hp Exh / Rtn Fan Motor – 20 hp
90
105
Size
–
25″ 36″
–
36″ 40″ 25″ 28″
–
Weight Size Weight
Refrigeration
1126
–
1630
1479
–
1503
1173
–
1421
1034
–
1300
1382
–
1462
292
–
294
26
–
25
46
–
49
Supply Fan Assembly
1159
32″
1361
1490
36″
1490
116
–
116
233
–
233
284
–
284
181
–
181
206
–
206
358
–
358
413
–
413
495
–
495
604
–
604
776
–
776
879
–
879
1102
–
1102
Return/Relief Fan Assembly
2294
36″
2294
2343
40″
2343
889
28″
979
979
32″
1429
119
–
119
244
–
244
295
–
295
160
160
181
–
181
206
–
206
206
–
206
120 Size Weight
–
1642
–
1626
–
1485
–
1892
–
2564
–
367
–
35
–
53
32″
1361
40″
1653
–
116
–
233
–
284
–
181
–
206
–
358
–
413
–
495
–
604
–
776
–
879
–
1102
36″
2294
44″
2445
28″
979
32″
1429
–
119
–
244
–
295
–
160
–
181
–
206
–
206
130 Size Weight
–
1666
–
1524
–
1485
–
1892
–
2564
–
367
–
35
–
53
32″
1361
40″
1653
–
116
–
233
–
284
–
181
–
206
–
358
–
413
–
495
–
604
–
776
–
879
–
1102
36″
2294
44″
2445
28″
979
32″
1429
–
119
–
244
–
295
–
160
–
181
–
206
–
206
150 Size Weight
–
1666
–
1786
–
1485
–
2564
–
–
367
–
35
–
53
32″
1361
40″
1653
–
116
–
233
–
284
–
181
–
206
–
358
–
413
–
495
–
604
–
776
–
879
–
1102
36″
2294
44″
2445
28″
979
32″
1429
–
119
–
244
–
295
–
160
–
181
–
206
–
206
22
RT-SVX087C-EN
Weights
Table 10. Component weights (continued)
90
105
Exh / Rtn Fan Motor – 25 hp Exh / Rtn Fan Motor – 30 hp Exh / Rtn Fan Motor – 40 hp Exh / Rtn Fan Motor – 50 hp Exh Fan Motor – 60 hp
Gas Heat Low Gas Heat Med Gas Heat High Electric Heat Steam Heat Low Steam Heat High Hot Water Heat Low Hot Water Heat High
Filter Rack – Throwaway Filters Filter Rack – Bag Filters Filter Rack – Cartridge Filters Final Filters – Bag Filters Final Filters – Cartridge Filters w/ 2″ pre-filter Final Filters – Cartridge Filters w/ 4″ pre-filter Final Filters – High Temp. Cartridge Final Filters – HEPA Final Filters – HEPA High Temp.
0-25% Damper Econ Econ w/ Air Measure ERW, Low CFM w/ Econ (b) ERW, High CFM w/ Econ (b) ERW, Low CFM w/ Econ and Air Measure (b) ERW, High CFM w/ Econ and Air Measure (b)
Cabinet Cabinet – 4′ Blank Section Cabinet – 8′ Blank Section
Control Box – Main Convenience Outlet Return Box Jucntion Box
2-Piece Adder
Size –
0.85M 1.1M 1.8M
–
–
–
–
–
–
Weight Size Weight
358
–
358
413
–
413
495
–
495
604
–
604
776
–
776
Heat
690
0.85M
690
840
1.1M
840
1150
1.8M
1150
485
–
485
753
–
753
821
–
821
773
–
773
818
–
818
Filters
181
–
181
395
–
395
662
–
662
392
–
392
607
–
607
638
–
638
669
–
669
1777
–
1777
1839
–
1839
Outside Air
637
–
637
760
–
760
724
–
724
3307
–
3307
3545
–
3514
3487
–
3487
3725
–
3694
Cabinet
8097
–
8315
935
–
935
1709
–
1709
Electrical Panels
519
–
519
36
–
36
80
–
80
60
–
60
2-Piece Unit Adder
406
–
406
(a) 2.5M includes weight associated with 12″ of cabinet length (b) Energy Recovery includes weight associated w/ 96″ of cabinet length.
120
Size Weight
–
358
–
413
–
495
–
604
–
776
1.1M 1.8M 2.5M
–
840 1150 1398(a) 485 802 886 841 897
–
191
–
395
–
662
–
392
–
607
–
638
–
669
–
1777
–
1839
–
699
–
865
–
807
–
3518
–
3756
–
3727
–
3965
–
9473
–
901
–
1682
–
519
–
36
–
80
–
60
–
406
130
Size Weight
–
358
–
413
–
495
–
604
–
776
1.1M 1.8M 2.5M
–
840 1150 1398 485 802 886 841 897
–
191
–
395
–
662
–
392
–
607
–
638
–
669
–
1777
–
1839
–
699
–
865
–
807
–
3681
–
3756
–
3890
–
3965
–
9473
–
901
–
1682
–
519
–
36
–
80
–
60
–
406
150
Size Weight
–
358
–
413
–
495
–
604
–
776
1.1M 1.8M 2.5M
–
840 1150 1398 485 802 886 841 897
–
191
–
395
–
662
–
392
–
607
–
638
–
669
–
1777
–
1839
–
699
–
865
–
807
–
3681
–
3756
–
3890
–
3965
–
9473
–
901
–
1682
–
519
–
36
–
80
–
60
–
406
Table 11. Roof curb weights
Tonnage
90-105 90-105 90-105 90-105
Energy Recovery
Wheel No
No
No
Yes
Blank Section
None 4 ft 8 ft
None
One-Piece Unit
907 988 1069 1093
Two-Piece Unit
1055 1136 1217 1240
RT-SVX087C-EN
23
Weights
Table 11. Roof curb weights (continued)
Tonnage
90-105 90-105 120-150 (All Units Except High Heat Gas models) 120-150 (All Units Except High Heat Gas models) 120-150 (All Units Except High Heat Gas models) 120-150 (High Heat Gas Models Only) 120-150 (All Units Except High Heat Gas models) 120-150 (All Units Except High Heat Gas models) 120-150 (All Units Except High Heat Gas models) 120-150 (High Heat Gas Models Only)
Energy Recovery
Wheel Yes Yes No No No No Yes Yes Yes Yes
Blank Section
4 ft 8 ft None 4 ft 8 ft None None 4 ft 8 ft None
One-Piece Unit
1174 N/A 1040 1122 N/A 1055 N/A N/A N/A N/A
Two-Piece Unit
1321 1401 1194 1275 1357 1209 1378 1459 1540 1393
24
RT-SVX087C-EN
A2L Information and Installation Requirements
Installation/Code Compliance Requirements
Building level controls may need to be upgraded/modified to demand leak mitigation actions as described in “Leak Detection System (Refrigerant charge greater than 3.91 lb per circuit),” p. 29. Those actions include, but are not limited to, fully opening damper and VAV boxes (if present), and disabling electric heat in VAV boxes (if present).
Verify the equipment refrigerant charge is in accordance with the room area limitation as described in Minimum Room Area Limits section.
Ensure that there are labels on the equipment stating it contains a flammable refrigerant.
A2L Work Procedures
WARNING
Risk of Fire — Flammable Refrigerant!
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.
· The equipment shall be stored in a room without continuously operating ignition sources.
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an explosion which could result in death or serious injury or equipment damage. System contains 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.
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.
The units described in this manual use R-454B refrigerant. Use ONLY R-454B rated service equipment or components with these units. For specific handling concerns with R-454B, contact your local Trane representative.
Installation, repair, removal, or disposal should be performed by trained service personnel.
At all times, Trane’s maintenance and service guidelines shall be followed. If in doubt, contact Trane technical support for assistance.
Servicing
Prior to initiating work on equipment, check the area with an appropriate refrigerant detector. Ensure the service personnel are properly trained regarding work in 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. Be aware that the refrigerant does not contain an odor.
If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing equipment shall be available on hand. A dry powder or CO2 fire extinguisher should be located adjacent to the charging area.
At all times, Trane’s maintenance and service guidelines shall be followed. If in doubt, contact Trane technical support for assistance.
All maintenance staff and others working in the local area shall be instructed on the nature of the work being carried out. Work in confined spaces shall be avoided.
Ignition Source Mitigation
Do not use any sources of ignition when working on the refrigeration system.
Keep all ignition sources, including cigarette smoking, away from the site of installation, repair, removal or disposal, during which refrigerant can potentially be released to the surrounding space.
Survey the area around the equipment before initiating work to ensure no flammable hazards or ignition risks are present.
“No Smoking” signs shall be displayed.
RT-SVX087C-EN
25
A2L Information and Installation Requirements
Do not use devices that can be a source of ignition to accelerate defrosting of components. Use only defrost and cleaning procedures recommended by Trane. Do not pierce or burn.
Ventilation
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. If present, check that the ventilation system, including outlets, are operating adequately and are not obstructed.
Refrigerating Equipment
Refrigerant piping or components should not be installed in locations where substances which may corrode them are present.
Check that equipment hazard markings are visible and legible. Replace them if they are not.
For equipment using secondary fluids, like water or glycol, check that refrigerant is not present in the secondary fluid loop before conducting any hot work.
Electrical Devices
Do not apply power to the circuit if a fault exists which compromises safety. If the fault cannot be corrected immediately, but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment, so all parties are advised.
Initial safety checks shall include:
· Cabling is not subject to wear, corrosion, excessive pressure, vibration, sharp edges, or any other adverse environmental effects. Account for the effects of aging or continual vibration from sources such as compressors or fans.
· Capacitors are discharged. This shall be done in a safe manner to avoid possibility of sparking.
· No live electrical components and wiring are exposed while charging, recovering, or purging the system.
· Verify continuity of earth bonding.
· Replace electrical components with Trane replacement parts, or those meeting the same ratings and qualified for flame arrest protection, UL LZGH2 category.
Leak Detection
Never use an open flame to detect leaks. A halide torch should not be used. Use only approved leak detection methods per this instruction manual.
The following leak detection methods are deemed acceptable for all refrigerant systems.
Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity may not be adequate, or may need re-
26
calibration. (Detection equipment shall be calibrated in a refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL gas (25% maximum) is confirmed.
Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
Examples of leak detection fluids are:
· Bubble method
· Fluorescent method agents
If a leak is suspected, all naked flames shall be removed/ extinguished.
If a refrigerant leak is found which requires brazing, all 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.
Refrigerant Removal and Evacuation
Ensure that the correct number of cylinders for holding the total system charge is available. All cylinders to be used are designated for the recovered refrigerant and labeled for that refrigerant (special cylinders for the recovery of refrigerant, for example). Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
When breaking into the refrigerant circuit to make repairs or for any other purpose conventional procedures shall be used. However, for flammable refrigerants it is important that best practice be followed, since flammability is a consideration.
The following procedure shall be adhered to:
1. Safely remove refrigerant following local and national regulations.
2. Evacuate.
3. Purge the circuit with inert gas.
4. Evacuate (optional for A2L).
5. Continuously flush or purge with inert gas when using flame to open circuit.
6. Open the circuit.
Prior to refrigerant removal, open all appropriate valves, including solenoid and electronic expansion valves (EXVs). Use control settings, where available. When not available, manually open all electronically controlled valves using acceptable service procedures.
The recovery equipment shall be in good working order with instructions available. Equipment shall be suitable for the recovery of the flammable refrigerant. For specific handling concerns, contact the manufacturer. Ensure all hose connections are checked for tightness to avoid refrigerant leaks.
RT-SVX087C-EN
In addition, a set of calibrated weighing scales shall be available and in good working order.
The refrigerant shall be recovered into the correct recovery cylinders if venting is not allowed by local and national codes. Do not mix refrigerants in recovery unit and especially not in cylinders.
Refrigerant recovery unit should be purged with an inert gas after each use or before using with a different refrigerant Class for example, A2L to A1.
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. The compressor body shall not be heated by an open flame or other ignition sources to accelerate this process. When oil is drained from a system, it shall be carried out safely.
The system shall be purged with oxygen-free nitrogen to render the appliance safe for flammable refrigerants. This process might need to be repeated several times. Compressed air or oxygen shall not be used for purging refrigerant systems.
The system shall be vented down to atmospheric pressure to enable work to take place.
The outlet for the vacuum pump shall not be close to any potential ignition sources, and ventilation shall be available.
Refrigerant Charging
In addition to conventional charging procedures, the following requirements shall be followed.
· Ensure that contamination of different refrigerants does not occur when using charging equipment.
· Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
· 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.
· Label the system when charging is complete (if not already).
· Extreme care shall be taken not to overfill the refrigerating system.
Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The system shall be leaktested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.
Prior to refrigerant charging, open all appropriate valves, including solenoid and electronic expansion valves (EXVs). Use control settings, where available. When not available, manually open all electronically controlled valves using acceptable service procedures.
Verify the equipment refrigerant charge is in accordance with the room area limitation as described in Minimum Room Area Limits section.
RT-SVX087C-EN
A2L Information and Installation Requirements
Decommissioning
Before carrying out the decommissioning procedure, it is essential that the trained service personnel is completely familiar with the equipment and all its details. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of recovered refrigerant. It is essential that electrical power is available before the task is commenced.
1. Become familiar with the equipment and its operation.
2. Isolate system electrically.
3. Before attempting the procedure, ensure that:
a. Mechanical handling equipment is available, if required, for handling refrigerant cylinders.
b. All personal protective equipment is available and being used correctly.
c. The recovery process is supervised at all times by a competent person.
d. Recovery equipment and cylinders conform to the appropriate standards.
4. Pump down refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
6. Make sure that cylinder is situated on the scales before recovery takes place.
7. Start the recovery machine and operate in accordance with instructions.
8. Do not overfill cylinders (no more than 80% volume liquid charge).
9. Do not exceed the maximum working pressure of the cylinder, even temporarily.
10. When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.
11. Recovered refrigerant shall not be charged into another refrigerating system unless it has been cleaned and checked.
12. When equipment has been decommissioned, attach a signed and dated label stating it has been decommissioned and emptied of refrigerant.
13. Ensure that there are labels on the equipment stating it contains flammable refrigerant.
A2L Application Considerations
This product is listed to UL standard 60335-2-40, Household and Similar Electrical Appliances Safety Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers, which defines safe design and use strategies for equipment using A2L
27
A2L Information and Installation Requirements
refrigerants. This standard limits the refrigerant concentration in a space in the event of a refrigerant leak. To meet the requirements, the UL standard defines minimum room area, refrigerant charge limit, minimum circulation airflow and/or ventilation airflow requirements, and limits the use of ignition sources in spaces. The standard may require a unit refrigerant leak detection system.
For equipment with R-454B and charge amounts less than or equal to 3.91 lbs per circuit, this UL standard does not prescribe a room area limit and does not require a refrigerant leak detection system or any circulation airflow or ventilation airflow mitigation strategies. However, ignition sources in ductwork must be evaluated.
Depending on the application, a specific requirement of ANSI/ASHRAE Standard 15, Safety Standard for Refrigeration Systems, could be more stringent than UL 60335-2-40 requirements. See Refrigeration Systems and Machinery Rooms Application Considerations for Compliance with ASHRAE® Standard 15-2022 Application Engineering Manual (APP-APM001*-EN) for more information.
Ignition Sources in Ductwork
Do not install open flames in the ductwork. Hot surfaces exceeding 700°C (1290°F) should not be installed in the ductwork unless the average airflow velocity is not less than 1.0 ms (200 ftmin) across the heater and proof of airflow is verified before system is energized.
Electric heaters can exceed the surface temperature limit if airflow distribution is poor, or insufficient airflow is provided over the heater.
Surface temperatures of most gas heaters do not exceed the surface temperature limits due to ANSI construction requirements.
Ignition Sources in Unit
This unit does not contain any ignition sources. All potential ignition sources, (including factory or field installed accessory electric heaters, gas heaters, relays, and contactors) were evaluated during product UL listing.
Minimum Room Area Limits (Refrigerant charge greater than 3.91 lb per circuit)
Equipment with R454B charge amounts greater than 3.91 lb per circuit may require additional circulation or ventilation airflow mitigation strategies. In this case, two minimum room area (Amin) thresholds: · The first threshold defines when equipment serving a
single room is required to provide circulation airflow, either continuous or activated by a leak detection system. A ducted system requires circulation airflow
unless the smallest room it serves is larger than the adjusted Amin threshold. This product contains a leak detection system if a circuit charge is greater than 3.91 lbs. As a result, no further leak detection system evaluation is required.
· The second threshold defines when additional ventilation airflow is required. If the room area, A or TA, is below the adjusted Amin or TAmin threshold, additional ventilation is required to remove refrigerant in the event of a leak. See the UL 60335-2-40 Clause GG.8 and ANSIASHRAE Standard 15 Section 7 for natural and mechanical ventilation requirements.
Table 12. Minimum room area
Minimum Room Area(a)
Tonnage
Eff
m2
ft2
90
S
154
1653
90
H
177
1908
90
V
169
1814
90
HV
185
1994
105
S
189
2032
105
H
215
2316
105
V
192
2065
105
HV
220
2369
120
S
244
2631
120
H
280
3017
120
V
237
2549
120
HV
279
3002
130
S
239
2575
130
H
277
2984
130
V
234
2523
130
HV
272
2931
150
S
276
2972
150
V
279
3006
(a) Based 2.2M installation height and maximum refrigerant charge
Minimum Room Area (Amin) Adjustments
Use equation below to adjust the minimum room area, as applicable, based on the unit’s installation height, altitude, and occupancy level it serves.
Amin.adj = Nameplate Amin x Altitude Adj x Height Adj x Focc
Multiply the altitude adjustment factor in the table below by Amin listed on the unit nameplate or in the Installation, Operation, and Maintenance (IOM) manual.
28
RT-SVX087C-EN
Table 13. Altitude adjustment factor
Altitude (ft)
Amin Adjustment
Sea Level to 2000
1
2001 to 4000
1.05
4001 to 6000
1.11
6001 to 8000
1.17
In addition, Amin can be adjusted if the unit is installed in a room at a height that is higher than the minimum height shown on the unit. To adjust Amin, multiply by the ratio of the unit minimum release height (in meters) / actual release height (in meters). Use 0.6 m in the ratio for unit minimum installation heights less than or equal to 0.6 m.
For institutional occupancies, ASHRAE Standard 15 applies an additional adjustment factor Focc to the amount of a charge allowed in a space. To calculate the adjusted Amin for institutional occupancies, multiply the Amin on the nameplate by two.
EXAMPLE 1: 20 Ton Packaged Rooftop Multi-Zone VAV System Serving an Institutional Occupancy Space
The packaged unit serves 7600 ft.2 of a nursing home located at an attitude of 4000 ft. The unit has two equally charged 10 ton refrigeration circuits. Each circuit has 12 lbs of refrigerant with a minimum room area requirement of 180 ft.2 with a 2.2 m release height.
TAmin.adj = 180 ft.2 x 1.05 x 2 = 378 ft.2
No additional ventilation is required.
EXAMPLE 2: 10 Ton Split System Serving a Single Commercial Occupancy Space
The split system serves a 1500 ft.2 manufacturing space at 5000 ft. altitude. The final installed charge of the single circuit 10 ton unit is 20 lb. The unit has an open return with a release height of 1 m and ducted supply air. The unit Amin is 660 ft.2.
Amin.adj = 660 ft.2 x 1.11 = 733 ft.2
No additional ventilation is required.
Determining Room Area (A or TA)
The room area (A) is the room area enclosed by the projection to the floor of the walls, partitions, and doors of the space that the equipment serves. For ducted systems, total room area (TA) of all rooms connected by ducts, may be used instead of A.
Rooms connected by drop ceilings only are not considered a single room.
Rooms on the same floor of the building, and connected by an open passageway, can be considered part of the same room if the passageway is a permanent opening, extends to the floor and is intended for people to walk through.
A2L Information and Installation Requirements
8001 to 10000
1.24
10001 to 12000
1.32
12001 to 14000
1.41
14001 to 15000
1.51
Over 15000 1.57
Adjacent rooms on the same floor of the building and connected by permanent openings in the walls and/or doors between rooms (including gaps between the wall and the floor), can be considered part of the same room if the openings meet the following criteria.
· The opening is permanent and cannot be closed.
· Openings extending to the floor, such as door gaps, need to be at least 20 mm above the floor covering surface.
· Natural ventilations opening areas must meet the requirements of ANSIASHRAE Standard 15-2022, Section 7.2.3.2.
Rooms that are connected by a mechanical ventilation system can be considered a single room area if the mechanical ventilation system meets the requirements of ANSIASHRAE Standard 15-2022, Section 7.6.4.
Leak Detection System (Refrigerant charge greater than 3.91 lb per circuit)
The leak detection system consists of one or more refrigerant detection sensors. When the system detects a leak, the following mitigation actions will be initiated until refrigerant has not been detected for at least 5 minutes:
· Energize the supply fan(s) to deliver a required minimum amount of circulation airflow.
· Disable compressor operation.
· Provide an output signal that can be used to fully open zone dampers and/or VAV boxes and disable electric heat in VAV boxes.
· Provide an output signal that can be used to energize additional mechanical ventilation (if needed).
· Units without airflow proving will disable electric heat sources.
Building fire and smoke systems may override this function.
If the refrigerant sensor has a fault, is at the end of its life, or is disconnected, the unit will initiate the mitigation actions. Mitigation actions may be verified by disconnecting the sensor.
The refrigerant sensors do not need service. Use only manufacturer-approved sensors when replacement is required.
RT-SVX087C-EN
29
Installation
Roof Curb and Ductwork
The roof curbs consist of two main components: a pedestal to support the unit condenser section and a “full perimeter” enclosure to support the unit’s air handler section.
Before installing any roof curb, verify the following:
· It is the correct curb for the unit.
· It includes the necessary gaskets and hardware.
· The purposed installation location provides the required clearance for proper operation.
· The curb is level and square — the top surface of the curb must be true to assure an adequate curb-to-unit seal.
Step-by-step curb assembly and installation instructions ship with each Trane accessory roof curb kit. Follow the instructions carefully to assure proper fit-up when the unit is set into place. Note: To assure proper condensate flow during operation,
the unit (and curb) must be as level as possible. The maximum slope allowable for rooftop unit applicationsexcluding Steam Heat Units, is 4″ endto-end and 2″ side-to-side. Units with steam coils must be set level!
If the unit is elevated, a field constructed catwalk around the unit is strongly recommended to provide easy access for unit maintenance and service. Recommendations for installing the Supply Air and Return Air ductwork joining the roof curb are included in the curb instruction booklet. Curb ductwork must be fabricated and installed by the installing contractor before the unit is set into place. Note: For sound consideration, cut only the holes in the
roof deck for the ductwork penetrations. Do not cut out the entire roof deck within the curb perimeter.
Pitch Pocket Location
The location of the main supply power entry is located at the bottom right-hand corner of the control panel. illustrates the location for the electrical entrance through the base in order to enter the control panel. If the power supply conduit penetrates the building roof beneath this opening, it is recommended that a pitch pocket be installed before the unit is placed onto the roof curb.
The center line dimensions shown in the illustration below indicates the center line of the electrical access hole in the
unit base when it is positioned on the curb, ±3/8 inch. The actual diameter of the hole in the roof should be at least 1/2 inch larger than the diameter of the conduit penetrating the roof. This will allow for the clearance variable between the roof curb rail and the unit base rail illustrated in Figure 5, p. 31.
The pitch pocket dimensions listed are recommended to enhance the application of roofing pitch after the unit is set into place. The pitch pocket may need to be shifted as illustrated to prevent interference with the curb pedestal.
Figure 4. Solid flow baffle wall installation for nonTrane roof curbs
Return Fan
Flow Baffle
Roof Curb Return Airflow
Return Airflow Duct
If a Trane Curb Accessory Kit is not used:
· The ductwork can be attached directly to the unit bottom, around the unit supply and return air openings. Be sure to use flexible duct connections at the unit.
· For “built-up” curbs supplied by others, gaskets must be installed around the curb and the supply and return air opening perimeters.
· If a “built-up” curb is provided by others, it should NOT be made of wood.
· If a “built-up” curb is provided by others, keep in mind that these commercial rooftop units do not have base pans in the condenser section.
· If this is a REPLACEMENT UNIT keep in mind that the CURRENT DESIGN commercial rooftop units do not have base pans in the condenser section.
30
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Figure 5. Pitch pocket location
Roof Curb 2Pc
Installation
Roof Curb 1Pc
B3 B2 B1
A2
B3 B2 B1
A1
Pitch Pocket
Table 14. Pitch pocket dimensions (in.)
Tonnages 90 105
120,130,150
One-Piece A1 113.8
131.8 140.8
Two-Piece A2
129.9±1 147.9±1 156.9±1
B1 68.875 68.875 68.875
Pitch Pocket
One or Two -Piece B2
73.875 73.875 73.875
B3 78.875 78.875 78.875
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31
Installation Field Converting Horizontal Ductwork (Supply or Return) from Right to the Left Side
Figure 6. Ductwork conversion
Door Header
Header
Panel 2
Header
Post Door Panel 1 Footer
As Shipped (Right Side Hz)
Right Side
Left Side
Panel 2 Panel 1
Right Side
Left Side
Field Converted (Left Side Hz)
To field convert horizontal ductwork from right side to the left, follow this procedure:
1. Remove Panel 2 from end of unit
2. Remove the Door and Door header from the left side.
3. Assemble Door header and Door removed from the left side in the empty location on the end wall.
4. Remove Panel 1 and Post from the left side. Remove gaskets from the base rail flange at the bottom.
5. Remove the top duct adapter, side duct adapters,
header, and footer in this order from the right side. Remove gaskets from post side flanges and the base rail flange at the bottom.
6. Assemble gaskets, header, footer, side duct adapters, and top duct adapter in this order to the left side. SeeFigure 6, p. 32 for gasket application details.
7. Finally assemble Post, gaskets, Panel 1, and Panel 2 in this order to the right side to complete the field conversion. See Figure 7, p. 33 and Figure 8, p. 34 for gasket application details.
32
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Figure 7. Ductwork conversion Hz Return & Supply Gasketing Application Details
Hz Supply or Return Header No Gasket Required
Vertical Support
Vertical Duct Adapter Channel
Align Gasket With Vertical Support Vertical Support Skin Edge
Base Rail
Bottom Horizontal Duct Adapter Channel
See Detail A
Detail A
Vertical Adapter Gasket
Vertical Adapter Gasket 1/8″ Thick x 3/4″ Wide
Vertical Adapter Gasket 1/8″ Thick x 3/4″ Wide
Vertical Support Align Gasket With Base Rail Surface
See Detail B
Base Rail
Detail B Typical Both Vertical Duct Adapters
Installation
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33
Installation
Figure 8. Ductwork conversion
Vertical Support/Base Rail Bottom Gasket Application Details
Gasket to Butt Up to Vertical Support Surface Typical Both Sides
Gasket 1/4″ Thick x 1″ Wide
Detail A Vertical Support
Align Gasket To Base Rail Surface
Base Rail
See Detail A
Unit Rigging and Placement
WARNING
Heavy Object!
Failure to follow instructions below could result in unit dropping which could result in death or serious injury, and equipment or property-only damage. Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift.
1. To configure the unit Center-of-Gravity, utilize Trane Select Assist or contact the local Trane sales office.
2. Attach adequate strength lifting slings to all lifting lugs. The figures beginning with Figure 10, p. 35 show the minimum distance between the lifting hook and the top of the unit and illustrate the installation of spreader bars to protect the unit and to facilitate a uniform lift. lists typical approximate minimal unit operating weights. To determine additional component weight, see .
3. Test lift the unit to ensure it is properly rigged and balanced, make any necessary rigging adjustments.
4. Lift the unit and position it over the curb and pedestal. These units have a continuous base rail around the air handler section which matches the curb. Important: For replacements, remove old gasket from the roof curb and place new gasket material on curb. See “,” to determine gasket material length using roof curb dimensions.
5. Align the base rail of the unit air handler section with the curb rail while lowering the unit onto the curb. Make sure that the gasket on the curb is not damaged while positioning the unit. (The pedestal simply supports the unit condenser section)
A cross section of the juncture between the unit and the roof curb is shown below.
Figure 9. Curb cross section
1 13/16
Gasket
Base Pan
14 1/16
Lifting Lug
2″x4″ 1/2
2
34
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Figure 10. Typical unit rigging–one-piece unit with three lifting lugs per side
24 ft min
Installation
Turnbuckle or Chain Adjustment for each lug
One piece unit with three lifting lugs per side
Note: Turnbuckle or chain adjustment required for each lifting point.
RT-SVX087C-EN
35
Installation
Figure 11. Typical unit rigging–one piece unit with four lifting lugs per side 20 ft min
15 ft min
Turnbuckler or Chain Adjustment for each lug
One piece unit with four lifting lugs per side
Note: Turnbuckle or chain adjustment required for each lifting point.
36
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Figure 12. Typical unit rigging–two-piece unit with two lifting lugs per side 12 ft min
Installation
12 ft min
Air handler with two lifting lugs per side
Turnbuckle or Chain Adjustment for each lug
Condenser with two lifting lugs per side
Note: Turnbuckle or chain adjustment required for each lifting point.
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37
Installation
Figure 13. Typical unit rigging–two-piece unit with three lifting lugs per air handler side
24 ft min
12 ft min
Air handler with three lifting lugs per side
Turnbuckle or Chain Adjustment for each lug
Note: Turnbuckle or chain adjustment required for each lifting point.
Condenser with two lifting lugs per side
Air-Cooled Condensers–Two-Piece Unit Fit Up
1. Rig the low side unit (Air handler) and the high side unit (Condenser) separately.
2. First, rig and set the low side unit on the roof curb (aligned with return end).
3. Take off and discard the protection boxes. (Do not remove wire shields).
4. Remove the rail connector splice brackets and install the brackets on the low side unit base rails.
5. Take off the side panels (these are labeled) and the top cover of the high side unit and set aside to be assembled later.
6. Rig and set the high side unit on roof curb pedestal, using the rail splice bracket as an alignment aid to connect the Low and high side units. The Low and high side unit rails should be butted together with a maximum 2″ separation.
7. Remove the left upper and lower louvered panels and the corner panels on each side to aid in tubing and wiring connections.
38
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Figure 14. (1) Protection box removal/(2) rail connector installation position
(1)
Installation
Figure 15. (3) Side and top filler panel removal/(4) high side installation preparation
(3)
Filler panel shipping position
(a)
(b)
Rail connector shipping position
Top cover shipping position
Filler panel shipping position
Note: Remove the filler panels and top cover before putting the Indoor and Outdoor sections together and screw to both Indoor and Outdoor panels on each side as shown in fig (6). Finally the top cover is assembled in space.
(4) (2)
Note: Do not remove the wiring shields
Note: Unscrew the rail connector as show in fig 1(b) and screw back to these locations
Unconnected tubes
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39
Installation
Figure 16. (5) Connected tubes/(6) install panels
(5)
Connected tubes (6)
40
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Figure 17. Refrigeration diagram
Liquid Line Suction Line
Installation
Legend Schrader Valve Manual shutoff valve Hotgas bypass valve Electronic expansion valve
Cap & Schrader Solenoid valve Hot gas Reheat Valve
Condenser Coil Circuit 2
Evaporator Coil Reheat Coil
Hot Gas Reheat
Hot gas Bypass
Suction Line
Liquid Line
Tubing and Wiring Connections Air-Cooled Tubing Connection
One piece Air Cooled units are shipped with refrigerant throughout the entire tubing assemblies. Two piece Air-Cooled low side and condenser sections are shipped with a Nitrogen holding charge. All service valves are shipped in an open position. Additional interconnecting tubes (approx. 15-20″ in length) will be supplied with the unit. Note: Field charging of two piece air-cooled units is
REQUIRED. To prepare the two piece sections for joining install pressure gauges to the appropriate access valve(s) to verify nitrogen charge is present. 1. Relieve the pressure before attempting to unsweat the
“seal” caps. 2. Remove the brackets which support the suction tubes
(retain for possible use later for unit reassembly) after the tubing connections are complete. 3. Place wet rags on the flow/ ball valve on the high side when suction tubes are being brazed.
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Condenser Coil Circuit 1
Note: Additional care should be taken when brazing near the wire bundle.
4. Sweat the copper caps off both the high and low side of the suction and liquid lines of both circuits. If present also sweat off the copper caps from hot gas bypass or hot gas reheat lines.
5. Clean the joints of weld puddles to avoid insertion problems.
6. Cut the appropriate interconnecting tube to a length approximately 0.75″- 1″ more than the distance between the two tubes.
7. Insert the appropriate tube to the complete depth of the bell on one side of the joint and align the other side (prying the high side may be needed). Make sure the insertion depth is met.
8. Complete the connections by brazing the tubes in place. Note: Refrigeration ball valves are intended for general service and are not a positive shutoff device.
9. Once all connections have been brazed, evacuate the entire system. The recommended method for evacuation and dehydration is to evacuate the system
41
Installation
to 500 microns or less. To establish that the unit is leakfree, use a standing vacuum test. The maximum allowable rise over a 15 minute period is 200 microns. If the rise exceeds this, there is either still moisture in the system or a leak is present.
10. Charge the system per the unit nameplate field charge. Do not add refrigerant in the suction line at this time to prevent excessive refrigerant in the low side prior to compressor start-up.
11. At the liquid line angle valve add as much R-454B LIQUID as possible. Depending on conditions, it could not be possible to add more than 60% of the field charge. This will be adequate for compressor start-up. More charge will be added after compressors are started. Use an accurate scale to measure and record the preliminary amount of R-454B added to each circuit.
12. With all the circuit compressors operating, SLOWLY meter R454B into the suction line from the LIQUID charging connection.
Electric Heat Wiring Connection
WARNING
Proper Field Wiring and Grounding Required!
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.
Important: For units with electric heat, complete tubing connections AFTER completing wiring connections. See “Tubing Connections” section.
1. Cut and remove wire ties which hold the electric control wires together, remove the shield bracket. Leave the armaflex on the hole with the control wires.
2. Cut the lowest wire tie which holds the electric heat power wires to the vertical post on the high side.
3. Route the power wires one by one in to the hole on the low side end panel and connect them to the terminal
block inside the electric Junction Box or inside the extended casing section. Note: For 8′ extended casing units, remove the panel
(this panel weighs approximately 60 pounds) next to the corner post in the low side to locate the terminal block. 4. Bundle the electric heat power and control wires with armaflex wrap on the low side end of the unit. Screw the shield bracket to compress the wire bundle and create a good seal, see . 5. Route the electric heat control wires to the Junction box located on the high side, see .
Power and Control Wiring Connections
Note: Complete Power and Control Wiring Connections after the tubing connections are complete.
1. Discard the clamps and the wire shield which hold the power and control wires.
2. Make the power and the control wire connections and route the wires such that they route straight from the hole at the bottom of the air handler, turn at right angles and straight up through the bottom of the high voltage junction box on the condenser side, see .
3. Assemble the louvered panels and the corner panels in the condenser side back in place.
4. Screw the side panels to both the air handler and condenser side panels to act as filler panels.
5. Finally, assemble the top cover back in place.
Figure 18. Wire routing at low side end wall
Rain Shield Bracket
Armaflex with Wire Ties
Electric Heat Power and Control Wires
42
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Figure 19. Wire routing and connections
Electric Heat Terminal Block
Electric Heat Power Wires – Routed through the hole at the air handler side end wall. Route wires one by one and connect to the electric heat terminal block.
Electric Heat Control Wires – Routed through the hole at the air handler side end wall. Remove wire ties at hole area to improve power wire routing. Terminate at high voltage junction box.
High Voltage Junction Box
Installation
Motor Power Wires and Heater Control Wires from the main control box will be terminated at the high voltage junction box by the factory.
Motor Power Wires are routed through the bottom opening and terminated at high voltage junction box. Control wires on the right side of unit have similar routing.
General Installation Requirements
Figure 20. Sealed ductwork
The checklist below is a summary of the steps required to successfully install a Commercial rooftop unit. This checklist is intended to acquaint the installing personnel with what is required in the installation process. It does not replace the detailed instructions called out in the applicable sections of this manual.
Complete “Unit Inspection,” p. 12 checklist.
Verify that the installation location of the unit will provide the required clearance for proper operation.
Assemble and install the roof curb. Refer to the current edition of the roof curb installer’s guide.
Fabricate and install ductwork; secure ductwork to curb. Seal the corners of duct adapters as shown below. Ducting attached to the unit should be self supporting. Do not use the unit to support the weight of the ducting.
Install pitch pocket for power supply through building roof. (If applicable).
Note: Customer to seal duct adapter corners as shown
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Rigging the Unit
Set the unit onto the curb; check for levelness. Ensure unit-to-curb seal is tight and without buckles or
cracks. Install and connect condensate drain lines to each
evaporator drain connection. Remove the shipping hardware from each compressor
assembly.
43
Installation
Remove the shipping hold-down bolts and shipping channels from the supply and relief fans with spring isolators.
Check all supply and relief fan spring isolators for proper adjustment.
Verify all discharge line service valves (one per circuit) are back seated.
Main Electrical Power
Verify that the power supply complies with the unit nameplate specifications. Refer to Main Unit Power Wiring in the Installation chapter.
Inspect all control panel components; tighten any loose connections.
Connect properly sized and protected power supply wiring to a field-supplied/installed disconnect and unit
Properly ground the unit.
All field-installed wiring must comply with NEC and applicable local codes.
Field Installed Control Wiring
Complete the field wiring connections as shown on the unit schematics.
Note: All field-installed wiring must comply with NEC and applicable local codes.
Electric Heat Units
Verify that the power supply complies with the electric heater specifications on the unit and heater nameplate.
Inspect the heater junction box and control panel; tighten any loose connections.
Check electric heat circuits for continuity.
Gas Heat
Gas supply line properly sized and connected to the unit gas train.
Properly sized main gas regulator installed to regulate pressure from supply.
All gas piping joints properly sealed.
Drip leg installed in the gas piping near the unit.
Gas piping leak checked with a soap solution. If piping connections to the unit are complete, do not pressurize piping in excess of 0.50 psig or 14 inches w.c. to prevent component failure.
Main supply gas pressure adequate.
Flue Tubes clear of any obstructions.
Factory-supplied flue assembly installed on the unit.
Connect the 3/4″ CPVC furnace drain stubout to a proper condensate drain. Provide heat tape or insulation for condensate drain as needed.
Hot Water Heat
Route properly sized water piping through the base of the unit into the heating section.
Install the factory-supplied, 3-way modulating valve.
Refer to the schematic to complete the valve actuator wiring.
Steam Heat
Route properly sized steam piping through the base of the unit into the heating section.
Install the factory-supplied, 2-way modulating valve
Complete the valve actuator wiring.
Install 1/2″, 15-degree swing-check vacuum breaker(s) at the top of each coil section. Vent breaker(s) to the atmosphere or merge with return main at discharge side of steam trap.
Position the steam trap discharge at least 12″ below the outlet connection on the coil.
Use float and thermostatic traps in the system, as required by the application.
O/A Pressure Sensor and Tubing Installation
(All VAV units and all units with Statitrac, see Figure 22, p. 46)
O/A pressure sensor mounted to the roof bracket.
Factory supplied pneumatic tubing installed between the O/A pressure sensor and the connector on the base rail.
Field supplied pneumatic tubing connected to the proper fitting on the space pressure transducer located in the return control panel, and the other end routed to a suitable sensing location within the controlled space.
Condensate Drain Connections
Each unit provides one 1-1/4″ evaporator drain connections on each side of the unit.
Due to the size of these units, all condensate drain connections must be connected to the evaporator drain connections.
Refer to Detail A in Figure 1, p. 15 for the location of these drain connections.
A condensate trap must be installed due to the drain connection being on the “negative pressure” side of the fan. Install the P Traps at the unit using the guidelines in Figure 1, p. 15.
44
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Figure 21. Condensate trap installation
Base rail
1-1/4″ NPT female connection
Field supplied condensate piping
Note: Negative static pressure in coil section.
Cleanout plug
Pitch the drain lines at least 1/2 inch for every 10 feet of horizontal run to assure proper condensate flow. Do not allow the horizontal run to sag causing a possible doubletrap condition which could result in condensate backup due to “air lock”.
Units with Gas Furnace
Units equipped with a gas furnace have a 3/4″ CPVC drain connection stubbed out through the vertical support in the gas heat section. It is extremely important that the condensate be piped to a proper drain. Refer to the appropriate illustration in Figure 30, p. 52 for the location of the drain connection. Note: Units equipped with an optional modulating gas
furnace will likely operate in a condensing mode part of the time.
Ensure that all condensate drain line installations comply with applicable building and waste disposal codes. Note: Installation on gas heat units will require addition of
heat tape to the condensate drain.
Removing Compressor Assembly Shipping Hardware
Each manifolded compressor assembly is rigidly bolted to a mounting rail assembly. The rail assembly is set on six (6) rubber isolators. The assembly is held in place by six (6) shipping “Tiedown” bolts. To remove the shipping hardware, follow the procedures below:
1. Remove the bolt in each rubber isolator and the slotted shipping spacer located between the compressor rails and the unit base rail illustrated in . Reinstall the bolts at the same location by screwing them into the base rail two to three turns only.
2. Ensure that the compressor rail assembly is free to move on the rubber isolator.
Removing Supply and Exhaust Fan Shipping Channels
Each supply fan assembly and exhaust fan assembly is equipped with spring isolators. Shipping channels are installed beneath each fan assembly and must be removed. To locate and remove these channels, refer to and use the following procedures.
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Installation
Spring Isolators
Spring isolators for the supply and/or exhaust fan are shipped with the isolator adjusting bolt backed out. Field adjustment is required for proper operation. shows isolator locations. To adjust the spring isolators use the following procedure. 1. Remove and discard the shipping tie down bolts but
leave the shipping channels in place during the adjustment procedure. See . 2. Tighten the leveling bolt on each isolator until the fan assembly is approximately 1/4″ above each shipping channel. 3. Secure the lock nut on each isolator. 4. Remove the shipping channels and discard.
O/A Sensor and Tubing Installation
An Outside Air Pressure Sensor is shipped with all units. On VAV systems, a duct pressure transducer and the outside air sensor is used to control the discharge duct static pressure to within a customer-specified parameter. On units equipped with 100% modulating relief with Statitrac, a space pressure transducer and the outside air sensor is used to control the relief fan and dampers to relieve static pressure to within a customer-specified parameter, within the controlled space. Use the following steps and image to install the sensor and the pneumatic tubing. 1. Remove the O/A pressure sensor kit located inside the
“ship with” item container. The kit contains the following items: a. O/A static pressure sensor with slotted mounting
bracket b. 50 ft. 0.188 in tubing c. Mounting hardware 2. Remove the two roof cap screws and install the provided L mounting bracket as shown in the figure. 3. Place the sensor mounting slotted bracket to the L mounting bracket with the slot located to the top. 4. Install the sensor vertically to the slotted bracket and secure it with provided bolt and nut. 5. Connect one end of factory provided tubing to the top port of sensor and pass it through the two slots in the mount and the other end to the port in the base. 6. Secure the tubing with the mounting hardware located in the ship with item container.
45
Installation
Figure 22. Outside air sensing kit
Sensor
Sensor mounting screws Sensor mounting slotted bracket
0.188in OD tubing
L bracket
Figure 23. Outside air tubing schematic
Upper Flow Ring
Low High
Fresh Air Transducer Left side
Lo Hi
Upper Flow Ring
Low High
Fresh Air Transducer Left side
Lo Hi
Upper Flow Ring
Low High
NC NO
C
Upper Flow Ring
Low High
NC NO
C
Figure 24. Return air pressure tubing schematic
Fresh Air Transducer Left side
Lo
Hi
Outside Air
NC NO
C
Return Plenum Pressure
46
Volts
Figure 25. Transducer voltage output vs. pressure input with VCM and TraqTM sensing
Transducer Voltage Output vs. Pressure Input 4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Pressure (inches w.c.)
Units with Statitrac
1. Open the filter access door and locate the Space Pressure and Duct Supply Pressure control devices, see the following image for specific location. There are three tube connectors mounted on the left of the solenoid and transducers.
2. Connect one end of the field provided 1/4″ (length 50-
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Installation
100 ft.) or 3/8″ (length greater than 100 ft.) O.D. pneumatic tubing for the space pressurization control to the bottom fitting.
3. Route the opposite end of the tubing to a suitable
location inside the building. This location should be the largest open area that will not be affected by sudden static pressure changes.
Figure 26. Space pressure and duct supply pressure tubing schematic
Gas Heat Unit
All internal gas piping is factory-installed and pressure leak-tested before shipment. Once the unit is set into place, the gas supply line must be field-connected to the elbow located inside the gas heat control compartments.
WARNING
Hazardous Gases and Flammable Vapors!
Failure to observe the following instructions could result in exposure to hazardous gases, fuel substances, or substances from incomplete combustion, which could result in death or serious injury. The state of California has determined that these substances may cause cancer, birth defects, or other reproductive harm.
Improper installation, adjustment, alteration, service or use of this product could cause flammable mixtures or lead to excessive carbon monoxide. To avoid hazardous gases and flammable vapors follow proper installation and setup of this product and all warnings as provided in this manual.
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Installation
WARNING
Explosion Hazard!
Failure to properly regulate pressure could result in a violent explosion, which could result in death, serious injury, or equipment or property-only-damage. When using dry nitrogen cylinders for pressurizing units for leak testing, always provide a pressure regulator on the cylinder to prevent excessively high unit pressures. Never pressurize unit above the maximum recommended unit test pressure as specified in applicable unit literature.
Access holes are provided on the unit as illustrated in to accommodate a side or bottom pipe entry.
Following the guidelines listed below will enhance both the installation and operation of the furnace. Note: In the absence of local codes, the installation must
conform with the American National Standard Z2231a of the National Fuel Gas Code, (latest edition).
1. To assure sufficient gas pressure at the unit, use Table 15, p. 49 as a guide to determine the appropriate gas pipe size for the unit heating capacity listed on the unit nameplate.
2. If a gas line already exists, verify that it is sized large enough to handle the additional furnace capacity before connecting to it.
3. Take all branch piping from any main gas line from the top at 90 degrees or at 45 degrees to prevent moisture from being drawn in with the gas.
4. Ensure that all piping connections are adequately coated with joint sealant and properly tightened. Use a piping compound that is resistant to liquid petroleum gases.
5. Provide a drip leg near the unit.
6. Install a main gas pressure regulator at the unit that is adequate to maintain 5.8 to 6.2inch w.c. for natural gas while the furnace is operating at full capacity. Important: Gas pressure in excess of 14inch w.c. or 0.5 psig will damage the gas train.
NOTICE
Gas Valve Damage!
Failure to follow instructions below could result in gas valve damage from incorrect gas pressures, irregular pulsating flame patterns, burner rumble, and potential flame outages. Use a pressure regulator to properly regulate gas pressure. DO NOT oversize the regulator.
Not using a pressure regulating device can lead to incorrect gas pressure, resulting in erratic operation and potential damage to the gas valve. Oversizing the regulator can cause irregular flame patterns, burner rumble, flame outages, and gas valve damage. When multiple rooftop units are served by a single pressure regulator, it should be sized to ensure that gas pressure remains between 5.8 to 6.2inch w.c. at full capacity and 14-inch w.c. when the furnaces are off.
7. Provide adequate support for all field installed gas piping to avoid stressing the gas train and controls.
WARNING
Explosion Hazard!
Failure to follow safe leak test procedures below could result in death or serious injury or equipment or property-only-damage. Never use an open flame to detect gas leaks. Use a leak test solution for leak testing.
8. Leak test the gas supply line using a soap-and-water solution or equivalent before connecting it to the gas train.
9. Check the supply pressure before connecting it to the unit to prevent possible gas valve damage and the unsafe operating conditions that will result. Note: Do not rely on the gas train shutoff valves to isolate the unit while conducting gas pressure/ leak test. These valves are not designed to withstand pressures in excess of 14inch w.c. or 0.5 psig.
Connecting the Gas Supply Line to the Furnace Gas Train
Follow the steps below to complete the installation between the supply gas line and the furnace. Refer to Figure 27, p. 50 and Figure 28, p. 51, for the appropriate gas train configuration.
1. Connect the supply gas piping using a “ground-joint” type union to the furnace gas train and check for leaks.
2. Confirm that the gas pressure to the unit from the supply is adjusted to the recommended 7inch to 14 inch w.c. parameter for natural gas.
3. Confirm that the piping is adequately supported to avoid gas train stress.
4. If the through the base gas opening is used, seal off around the pipe and the 3inch water dam. If the through the base gas opening is not used, the 3inch opening should be sealed shut to prevent indoor air leakage.
48
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Installation
Table 15. Sizing natural gas pipe mains and branches
Gas SupplyPipe Run (ft)
1¼” Pipe
1½” Pipe
Gas Input (Cubic Feet/Hour)
2″ Pipe
2½” Pipe
3″ Pipe
4″ Pipe
10
1,060
1,580
3,050
4,860
8,580
17,500
20
726
1,090
2,090
3,340
5,900
12,000
30
583
873
1,680
2,680
4,740
9,660
40
499
747
1,440
2,290
4,050
8,270
50
442
662
1,280
2,030
3,590
7,330
60
400
600
1,160
1,840
3,260
6,640
70
368
552
1,060
1,690
3,000
6,110
80
343
514
989
1,580
2,790
5,680
90
322
482
928
1,480
2,610
5,330
100
304
455
877
1,400
2,470
5,040
125
269
403
777
1,240
2,190
4,460
150
244
366
704
1,120
1,980
4,050
175
224
336
648
1,030
1,820
3,720
200
209
313
602
960
1,700
3,460
Notes: 1. Table is based upon specific gravity of 0.60. Refer to the latest edition of the National Fuel Gas Code, Z223.1, unless superseded by local gas codes. 2. If more than one unit is served by the same main gas supply, consider the total gas input (cubic feet/hr.) and the total length when determining the appropriate gas pipe size. 3. Obtain the Specific Gravity and BTU/Cu.Ft. from the gas company. 4. The following example demonstrates the considerations necessary when determining the actual pipe size: Example: A 40′ pipe run is needed to connect a unit with a 850 MBh furnace to a natural gas supply having a rating of 1,000 BTU/Cu.Ft. and a specific gravity of 0.60 Cu.Ft/Hour = Furnace MBh Input Gas BTU/Cu.Ft. X Multiplier Cu.Ft/Hour = 850 The above table indicates that a 2″ pipe is required.
Table 16. Specific gravity multipliers
Specific Gravity
Multiplier
0.50
1.10
0.55
1.04
0.60
1.00
0.65
0.96
Table 17. Gas heating capacity altitude correction factors
Altitude (Ft.)
Sea Level To 2000
2001 to 2500 2501 to 3500 3501 to 4500
Capacity Multiplier
1.00
.92
.88
.84
Note: Correction factors are per ANSI Z223.1/NFPA 54. Local codes may supersede.
4501 to 5500 .80
5501 to 6500 .76
6501 to 7500 .72
RT-SVX087C-EN
49
Installation
Figure 27. Two-stage and modulating natural gas train for 850, 1100 MBh heaters
Ingnition transformer
Manifold gas pressure tap
Manifold gas manual
shutoff valve
Pilot gas pressure tap
Air damper
Pilot solenoid valve Pilot pressure regulator
Ratio regulator
Inlet gas pressure tap
1-1/4″ Field connection elbow
Load line pressure tap
Manual
shut-off valve Main gas regulator
to Combustion air sensor
Main gas solenoid valves
Main gas regulator outlet pressure tap
50
RT-SVX087C-EN
Installation
Figure 28. Two-stage and modulating for 1800, 2500 MBh heaters (1800 MBh shown)
Manifold gas pressure tap
Ingnition transformer
Manifold gas manual shutoff valve Load line pressure tap
Pilot gas pressure tap Pilot solenoid valve Pilot pressure regulator Inlet gas pressure tap
Ratio regulator Air damper
2″ Field connection elbow
Main gas
regulator
Manual shut-off valve
Main gas regulator outlet
pressure tap
Main gas solenoid valves
to Combustion air sensor
Table 18. Gas heat inlet sizes
Standard Gas Heat Input (MBh)
Gas Heat Inlet Sizes (in.)
850
1 1/4
1100
1 1/4
1800
2
2500
2
Flue Assembly Installation
1. Locate the collapsed flue assembly in the compartment above the gas heat controls by removing the panel screws. The assembly is secured by screws up through the roof of the gas controls compartment roof.
2. Separate the pieces of the collapsed assembly and then assemble the stack as shown in Figure 29, p. 51.
3. Insert the tube on the flue assembly into the hole located in the vertical support for the heat section.
4. Butt both tube sections together and center the pipe clamp over joint.
5. Using the pre-punch hole in the flue assembly, extension, and the vertical support, install the appropriate number of mounting brackets (Refer to the
installation instructions that ship with the flue assembly.)
Figure 29. Flue assembly
Flue Extension
Vent Cap Assembly
Heat Section Vertical Support
Mounting Bracket
Flue Tube
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Installation
Figure 30. Gas heat piping penetration locations
2.5M & 1.8M (W=16 1/8in, D=14 11/16in) 1.1M, 0.8M (W=9 15/16in, D=9 12/16in)
Unit end plane
Top View B
Ø3
D
1
7 8
W
5 11 8
Hole at the base 7
20 16
C
H Edge of mist eliminator
K Side View
Horizontal gas pipe inlet Pipe type: Black pipe, sch 40
19 21 Condensate drain outlet Pipe type: cpvc
Table 19. Gas heat piping penetration measurements
Tons 90-105 90-105 90-105 120-150 120-150 120-150 90-105 90-105 90-105 120-150 120-150 120-150
Energy Recovery
Wheel (ERW)
No ERW No ERW No ERW No ERW No ERW No ERW
ERW ERW ERW ERW ERW ERW
Pieces 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc 1 & 2 Pc
Heat (MBH) 1800 1100
850 2500 1800 1100 1800 1100 850 2500 1800 1100
Gas Flue
Mist Elim to Flue C/ L K
160 1/16 159 15/16 159 15/16 214 11/16 214 13/16 214 11/16 164 11/16 164 8/16 164 8/16 219 13/16
220 219 13/16
Condensate Drain Outlet
Gas Connection, Horizontal
Horizontal Distance
Unit End to Hole C/L C
254 14/16 263 15/16 263 15/16
321 319 11/16 327 14/16 351 5/16 360 6/16 360 6/16 417 7/16 416 2/16 424 5/16
Unit End to Hole C/L H
266 4/16 265 5/16 265 5/16 337 7/16
331 330 1/16 362 10/16 361 12/16 361 12/16 433 14/16 427 7/16 426 8/16
Gas Connection, Base
B 274 11/16 274 11/16 274 11/16 339 7/16 339 7/16 339 7/16 371 1/16 371 1/16 371 1/16 435 14/16 435 14/16 435 14/16
52
RT-SVX087C-EN
General Coil Piping and Connection Recommendations
Proper installation, piping, and trapping is necessary to ensure satisfactory coil operation and to prevent operational damage: Note: The contractor is responsible for supplying the
installation hardware.
Support all piping independently of the coils.
Provide swing joints or flexible fittings on all connections that are adjacent to heating coils to absorb thermal expansion and contraction strains.
Install factory supplied control valves (valves ship separately).
NOTICE
Connection Leaks!
Failure to follow instructions below could result in damage to the coil header and cause connection leaks. Use a backup wrench when attaching piping to coils with copper headers. Do not use brass connectors because they distort easily.
When attaching the piping to the coil header, make the connection only tight enough to prevent leaks. Maximum recommended torque is 200 foot-pounds.
NOTICE
Over Tightening!
Failure to follow instructions below could result in damage to the coil header. Do not use teflon-based products for any field connections because their high lubricity could allow connections to be over tightened.
Use pipe sealer on all thread connections.
NOTICE
Leakage!
Failure to follow instructions below could result in equipment damage. Properly seal all penetrations in unit casing from inner to outer panel in order to prevent unconditioned air from entering the module, as well as prevent water from infiltrating the insulation.
After completing the piping connections, seal around pipe from inner panel to outer panel.
Hot Water Heat Units (SLH_)
Hot water heating coils are factory installed inside the heater section of the unit. Once the unit is set into place, the hot water piping and the factory provided 3way modulating valve must be installed. The valve can be installed inside the heat section or near the unit. If the valve is installed in a remote location, use field supplied wiring to
RT-SVX087C-EN
Installation
extend the control wires from the heater section to the valve. Two access holes are provided in the unit base as illustrated in Figure 31, p. 55.
Use the following guidelines to enhance both the installation and operation of the “wet heat” system.
Figure 32, p. 55 illustrates the recommended piping configuration for the hot water coil. Table 20, p. 54 lists the coil connection sizes. Note: The valve
Documents / Resources
 |
TRANE IntelliPak2 Rooftop Units [pdf] Instruction Manual RT-SVX087C-EN, IntelliPak2 Rooftop Units, IntelliPak2, Rooftop Units, Units |