Ingersoll-Rand Precedent W/DHC036H Installation and operating instructions

September 2022 RT-SVX23R-EN
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.
Packaged Rooftop Air Conditioners
Precedent™ — Heat Pump
3 to 10 Tons — 60 Hz
Installation, Operation, and Maintenance
Model Numbers: WSC036H-WSC060H
Model Numbers: WSC092H, WSC102H, WSC120H
Model Numbers: W/DHC036H-W/DHC120H

©2022 RT-SVX23R-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.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It could
also be used to alert against unsafe
practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only
accidents.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the atmosphere. In
particular, several of the identified chemicals that may affect
the ozone layer are refrigerants that contain Chlorine, Fluorine
and Carbon (CFCs) and those containing Hydrogen, Chlorine,
Fluorine and Carbon (HCFCs). Not all refrigerants containing
these compounds have the same potential impact to the
environment. Trane advocates the responsible handling of all
refrigerants-including industry replacements for CFCs and
HCFCs such as saturated or unsaturated HFCs and HCFCs.
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 AirAct (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
Labeling 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.

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.
Introduction
RT-SVX23R-EN 3
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.
Revision History
• Updated Model Number Description chapter.
• Updated Dimensions and Weights chapter.
• Updated Installation chapter.
• Updated Wiring Diagrams chapter.

4RT-SVX23R-EN
Table of Contents
Model Number Descriptions . . . . . . . . . . . . . . . . 6
Model Number Notes . . . . . . . . . . . . . . . . . . 7
General Information . . . . . . . . . . . . . . . . . . . . . . . 8
Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . 8
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Unit Nameplate . . . . . . . . . . . . . . . . . . . . . . 8
Compressor Nameplate . . . . . . . . . . . . . . . . 8
Unit Description . . . . . . . . . . . . . . . . . . . . . . 8
Economizer Control Actuator (Optional) . . . 8
System Input Devices and Functions . . . . . . 9
Low Pressure Control . . . . . . . . . . . . . . . . . . 9
High Pressure Control . . . . . . . . . . . . . . . . . 9
Power Exhaust Control (Optional) . . . . . . . 10
Lead/Lag Control (Dual Circuit Only) . . . . . 10
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Dimensions and Weights . . . . . . . . . . . . . . . . . 13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Foundation . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Horizontal Units . . . . . . . . . . . . . . . . . . . . . 21
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Roof Curb . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
General Unit Requirements . . . . . . . . . . . . . . 24
Factory Installed Economizer . . . . . . . . . . . 24
Temperature Limit Switch Usage 
for Electric Heat Units . . . . . . . . . . . . . . . . 24
Horizontal Discharge Conversion 
WSC036H, WSC048H, W/DHC036H . . . . . . 24
Horizontal Discharge Conversion 
WSC060H, WSC092-120H, 
W/DHC048-120H . . . . . . . . . . . . . . . . . . . . . . 25
TCO-A Instructions . . . . . . . . . . . . . . . . . . . 26
Return Air Smoke Detector . . . . . . . . . . . . 26
Air-Fi®Wireless Communication Interface . . 27
Main Electrical Power Requirements . . . . . . 28
Through-the-Base Gas Installation . . . . . . . . 28
Requirements for Gas Heat . . . . . . . . . . . . . 28
Electric Heat Requirements . . . . . . . . . . . . 29
Low Voltage Wiring 
(AC and DC) Requirements . . . . . . . . . . . . .29
Condensate Drain Configuration . . . . . . . . . .29
Filter Installation . . . . . . . . . . . . . . . . . . . . . .30
Field Installed Power Wiring . . . . . . . . . . . . . .30
Standard Wiring . . . . . . . . . . . . . . . . . . . . . .30
Optional TBUE Wiring 
(Through-the-Base Electrical Option) . . . . .30
Field Installed Control Wiring . . . . . . . . . . . .31
Controls Using 24 Vac . . . . . . . . . . . . . . . . .31
Controls Using DC Analog Input/Outputs 
(Standard Low Voltage Multiconductor 
Wire) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Space Temperature Averaging 
(ReliaTel™ only) . . . . . . . . . . . . . . . . . . . . .34
Pre-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Voltage Imbalance . . . . . . . . . . . . . . . . . . . . . .38
Electrical Phasing (Three Phase Motors) . . .38
Compressor Crankcase Heaters . . . . . . . . .39
ReliaTel™ Controls . . . . . . . . . . . . . . . . . . .39
Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Unit Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Sequence of Operation . . . . . . . . . . . . . . . . . .42
ReliaTel™ Controls . . . . . . . . . . . . . . . . . . .42
ReliaTel™ Controls - Constant 
Volume (CV) . . . . . . . . . . . . . . . . . . . . . . . .42
ReliaTel™ Control Cooling without 
an Economizer . . . . . . . . . . . . . . . . . . . . . . .42
Three-Stages of Cooling . . . . . . . . . . . . . . .42
ReliaTel™ Control Evaporator 
Fan Operation (for Gas Units) . . . . . . . . . . .42
ReliaTel™ Control Evaporator Fan 
Operation (for Cooling Only Units) . . . . . . . .43
Low Ambient Operation . . . . . . . . . . . . . . . .43
Multi-Speed Indoor Motor . . . . . . . . . . . . . .43
Fan Output% . . . . . . . . . . . . . . . . . . . . . . . .43
Multi-Zone VAV Sequence of Operation . . . .43
Supply Air Pressure Control . . . . . . . . . . . . .43
Supply Air Static Pressure Limit . . . . . . . . . .44
Supply Air Temperature Controls . . . . . . . . .44
Supply Air Setpoint Reset . . . . . . . . . . . . . .44

Table of Contents
RT-SVX23R-EN 5
Zone Temperature Control . . . . . . . . . . . . . 44
Variable Air Volume Applications 
(Single Zone VAV) . . . . . . . . . . . . . . . . . . . . . 45
Discharge Air Cool Setpoint Adjustment . . 45
ReliaTel™ Control Cooling with 
an Economizer . . . . . . . . . . . . . . . . . . . . . . 45
ReliaTel™ Control Dehumidification . . . . . 46
Dehumidification Coil Purge Cycle . . . . . . . 46
ReliaTel™ Control Cooling with 
an Economizer . . . . . . . . . . . . . . . . . . . . . . 46
Economizer Set-Up . . . . . . . . . . . . . . . . . . 46
ReliaTel™ Control Heating Operation 
(for Cooling Only Units) . . . . . . . . . . . . . . . 47
ReliaTel™ Control Heating Operation 
(for Gas Units) . . . . . . . . . . . . . . . . . . . . . . 47
Ignition Module . . . . . . . . . . . . . . . . . . . . . . 47
Drain Pan Condensate Overflow Switch 
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Sequence of Operation - Heat Pumps . . . . . . 49
Heating Operation . . . . . . . . . . . . . . . . . . . . . 49
Demand Defrost . . . . . . . . . . . . . . . . . . . . . . . 49
Emergency Heat Operation . . . . . . . . . . . . . . 49
Verifying Proper Air Flow . . . . . . . . . . . . . . . . 49
Units with 5-Tap Direct Drive Indoor Fan . . 49
Units with Belt Drive Indoor Fan . . . . . . . . . 50
Units with Constant CFM 
Direct Drive Indoor Fan . . . . . . . . . . . . . . . 50
3 to 5 Ton 17 Plus/WHC/DHC units with 
the constant CFM direct drive indoor fan . . 50
ReliaTel™ Units Equipped with Direct Drive 
Indoor Plenum Fan (optional except for 
10 Ton Units) . . . . . . . . . . . . . . . . . . . . . . . 51
Return Air Smoke Detector . . . . . . . . . . . . 52
Economizer Start-Up . . . . . . . . . . . . . . . . . 52
Compressor Start-Up . . . . . . . . . . . . . . . . . 53
Heating Start-Up . . . . . . . . . . . . . . . . . . . . 54
Final System Setup . . . . . . . . . . . . . . . . . . 54
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Fan Belt Adjustment - Belt Drive Units . . . . . 55
Monthly Maintenance . . . . . . . . . . . . . . . . . . 56
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Return Air Smoke Detector Maintenance . . 56
Condensate Overflow Switch . . . . . . . . . . . 56
Cooling Season . . . . . . . . . . . . . . . . . . . . . .56
Heating Season . . . . . . . . . . . . . . . . . . . . . .56
Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . .57
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .59
ReliaTel™ Control . . . . . . . . . . . . . . . . . . . . . .59
System Status Checkout Procedure . . . . . . .59
Method 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Resetting Cooling and Heating Lockouts . . .60
Zone Temperature Sensor (ZTS) 
Service Indicator . . . . . . . . . . . . . . . . . . . . . . .61
Clogged Filter Switch . . . . . . . . . . . . . . . . . .61
Fan Failure Switch . . . . . . . . . . . . . . . . . . . .61
Condensate Overflow Switch . . . . . . . . . . . .61
Zone Temperature Sensor (ZTS) Test . . . . . .61
Test 1 Zone Temperature Thermistor 
(ZTEMP) . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Test 2 Cooling Set Point (CSP) and 
Heating Set Point (HSP) . . . . . . . . . . . . . . .61
Test 3 System Mode and Fan Selection . . .61
Test 4 LED Indicator Test, (SYS ON, 
HEAT, COOL and SERVICE) . . . . . . . . . . .61
Programmable and Digital Zone 
Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . .62
Mixed Air Temperature Low 
Limit Diagnostic . . . . . . . . . . . . . . . . . . . . . . . .64
Troubleshooting Procedures for Direct 
Drive Plenum Fan . . . . . . . . . . . . . . . . . . . . . .64
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . .65
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . .67
Heat Pump WCD, WCH, WSC, 
WHC and DHC (Parts Only) . . . . . . . . . . . .67
Models Less Than 20 Tons 
for Commercial Use* . . . . . . . . . . . . . . . . . .67

6RT-SVX23R-EN
Model Number Descriptions
Digit 1 - Unit Type
W Packaged Heat Pump2
D Dual Fuel Heat Pump
Digit 2 - Efficiency
S Standard Efficiency
H High Efficiency
Digit 3 - Airflow
C Convertible
Digit 4,5,6 - Nominal Gross Cooling
Capacity (MBh)
036 3 Ton
048 4 Ton
060 5 Ton
074 6 Ton
092 7.5 Ton
102 8.5 Ton
120 10 Ton
Digit 7 - Major Design Sequence
Digit 8 - Voltage Selection
3 208-230/60/3
4 460/60/3
W 575/60/3
Digit 9 - Unit Controls
R ReliaTel™ Microprocessor
Digit 10 - Heating Capacity
Note: Applicable to Digit 1,W models only.
0 No Electric Heat
B6kW
C9kW
E 12 kW
G 18 kW
J 23 kW
K 27 kW
N 36 kW
P 54 kW
Note: Applicable to Digit 1,D models only.
L Low Heat
M Medium Heat
H High Heat
X Low Heat, Stainless Steel Heat
Exchanger
Y Medium Heat, Stainless Steel Heat
Exchanger
Z High Heat, Stainless Steel Heat
Exchanger
Digit 11 - Minor Design Sequence
Digit 12,13 - Service Sequence
** Factory Assigned
Digit 14 - Fresh Air Selection
0 No Fresh Air
A Manual Outside Air Damper 0-50%1
B Motorized Outside Air Damper
0-50%10
C Economizer, Dry Bulb 0-100%
without Barometric Relief4
D Economizer, Dry Bulb 0-100%
with Barometric Relief4
E Economizer, Reference Enthalpy
0-100% without Barometric Relief4
F Economizer, Reference Enthalpy
0-100% with Barometric Relief4
G Economizer, Comparative
Enthalpy 0-100% without
Barometric Relief4
H Economizer, Comparative
Enthalpy 0-100% with Barometric
Relief4
K Low Leak Economizer with
Barometric Relief
M Low Leak Economizer with Reference
Enthalpy with Barometric Relief
P Low Leak Economizer with
Comparative Enthalpy with
Barometric Relief
Digit 15 - Supply Fan/Drive Type/
Motor
0 Standard Drive3
1 Oversized Motor3
2 Optional Belt Drive Motor
6 Single Zone Variable Air
Volume (SZVAV)14
7 Multi-Speed Indoor Fan12
8 Single Zone Variable Air Volume
(SZVAV) w/Oversized Motor14
E Multi-Zone Variable Air Volume
(MZVAV)14
F Multi-Zone Variable Air Volume
(MZVAV) w/Oversized Motor14
Digit 16 - Hinged Service Access/
Filters
0 Standard Panels/Standard Filters
A Hinged Access Panels/Standard Filters
B Standard Panels/2-in. MERV 8 Filters
C Hinged Access Panels/2-in. MERV 8
Filters
D Standard Panels/2-in. MERV 13 Filters
E Hinged Access Panels/2-in. MERV 13
Filters
Digit 17 - Condenser Coil Protection
0 Standard Coil
1 Standard Coil with Hail Guard
2 Black Epoxy Pre-Coated Condenser
Coil
3 Black Epoxy Pre-Coated Condenser
Coil with Hail Guard
Digit 18 - Through-the-Base
Provisions
0 No Through-the-Base Provisions
A Through-the-Base Electric5
B Through-the-Base Gas Piping17
C Through-the-Base Electric and Gas
Piping17
Digit 19 - Disconnect/Circuit
Breaker (three-phase only)
0 No Disconnect/No Circuit Breaker
1 Unit Mounted Non-Fused Disconnect5
2 Unit Mounted Circuit Breaker5
Digit 20 - Convenience Outlet
0 No Convenience Outlet
A Unpowered Convenience Outlet
B Powered Convenience Outlet
(three-phase only)6
Digit 21 - Communications Options
0 No Communications Interface
1Trane
®Communications Interface
2 LonTalk®Communications Interface
6BACnet
®Communications Interface
7 Air-Fi® Wireless Communications15
Digit 22 - Refrigeration System
Option
0 Standard Refrigeration System7
Digit 23 - Refrigeration Controls
0 No Refrigeration Control2
1Frostat™
11
2 Crankcase Heater16
3 Frostat™ and Crankcase Heater11,16
Digit 24 - Smoke Detector
0 No Smoke Detector
A Return Air Smoke Detector8
B Supply Air Smoke Detector
C Supply and Return Air Smoke
Detectors8
D Plenum Smoke Detector
Digit 25 - System Monitoring
Controls
0 No Monitoring Control
1 Clogged Filter Switch
2 Fan Failure Switch
3 Discharge Air Sensing Tube
4 Clogged Filter Switch and Fan
Fail Switch
5 Clogged Filter Switch and Discharge
Air Sensing Tube
6 Fan Fail Switch and Discharge Air
Sensing Tube
7 Clogged Filter and Fan Fail Switches
and Discharge Air Sensing Tube
A Condensate Drain Pan Overflow
Switch
B Clogged Filter Switch and
Condensate Drain Pan Overflow
Switch
C Fan Failure Switch and Condensate
Drain Pan Overflow Switch
D Discharge Air Sensing and
Condensate Drain Pan Overflow
Switch
E Clogged Filter Switch, Fan Failure
Switch and Condensate Drain Pan
Overflow Switch
F Clogged Filter Switch, Discharge
Air Sensing Tube and Condensate
Drain Pan Overflow Switch
G Fan Failure Switch, Discharge Air
Sensing Tube and Condensate
Drain Pan Overflow Switch

Model Number Descriptions
RT-SVX23R-EN 7
H Clogged Filter Switch, Fan Failure
Switch, Discharge Air Sensing
and Condensate Drain Pan Overflow
Switch
Digit 26 - System Monitoring
Controls
0 No Monitoring Controls
A Demand Control Ventilation (CO2)13
B Low Leak Economizer with FDD
(Fault Detection and Diagnostics)
C FDD (Fault Detection and Diagnostics)
with DCV (Demand Control Ventilation)
Digit 27 - Unit Hardware
Enhancements
0 No Enhancements
1 Stainless Steel Drain Pan
Digit 31 - Advanced Unit Controls
0 Standard Unit Controls
1 Human Interface
Model Number Notes
1. Manual outside air damper will ship
factory supplied within the unit, but
must be field installed.
2. High pressure control is standard on
all units.
3. Multi-stage, direct drive standard on
3 to 5 tons models. Belt drive
standard on 7.5 to 8.5 tons standard
efficiency models. Variable speed
direct drive standard on 10 tons
model and 6 to 8.5 tons high
efficiency models.
4. Economizer with barometric relief is
for downflow configured units only.
Order economizer without
barometric relief for horizontal
configuration. Barometric relief for
horizontal configured units must be
ordered as field installed accessory.
5. Through-the-base electric required
when ordering disconnect/circuit
breaker options.
6. Requires use of disconnect or
circuit breaker.
7. Standard metering devices are
TXVs.
8. The return air smoke detector may
not fit up or work properly on the
Precedent™ units when used in
conjunction with 3rd party
accessories such as bolt on heat
wheels, economizers and power
exhaust. Do not order the return air
smoke detectors when using this
type of accessory.
9. Requires hinged access panels.
10. Motorized outside air damper is not
available on multi-speed or SZVAV
(Single Zone Variable Air Volume)
or MZVAV (Multi Zone Variable Air
Volume) products.
11. Frostat™ standard on 6 to 10 tons
High Efficiency, multi-speed and
SZVAV (single zone variable air
volume) products.
12. Multi-speed indoor fan available on
6, 7.5, 8.5 and 10 tons products.
13. Demand control ventilation option
includes wiring only. The CO2
sensor is a field-installed only
option.
14. SZVAV/MZVAV available only on 
3 to 10 tons high efficiency and
SZVAV available on 7.5 to 10 tons
standard efficiency unit.
15. Must be used with BACnet®open
protocol.
16. Crankcase heater is standard on all
heat pumps.
17. Includes gas piping and shutoff
(field assembly required).

8RT-SVX23R-EN
General Information
Unit Inspection
As soon as the unit arrives at the job site
• Verify that the nameplate data matches the data on the
sales order and bill of lading (including electrical data).
• Verify that the power supply complies with the unit
nameplate specifications.
• Visually inspect the exterior of the unit, including the roof,
for signs of shipping damage.
If the job site inspection of the unit 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.
• Visually inspect the internal components for shipping
damage as soon as possible after delivery and before it is
stored. Do not walk on the sheet metal base pans.
• If concealed damage is discovered, notify the carrier’s
terminal of damage immediately by phone and by mail.
Concealed damage must be reported within 15 days.
• Request an immediate joint inspection of the damage by
the carrier and the consignee. Do not remove damaged
material from the receiving location. Take photos of the
damage, if possible. The owner must provide reasonable
evidence that the damage did not occur after delivery.
• Notify the appropriate sales representative before
installing or repairing a damaged unit.
Storage
Take precautions to prevent condensate from forming inside
the unit’s electrical compartments and motors if:
1. the unit is stored before it is installed; or,
2. the unit is set on the roof curb, and temporary heat is
provided in the building. Isolate all side panel service
entrances and base pan openings (e.g., conduit holes,
Supply Air and Return Air openings, and flue openings)
from the ambient air until the unit is ready for start-up.
Note: Do not use the unit’s heater for temporary heat without
first completing the start-up procedure detailed under
the Unit Start-Up chapter.
The manufacturer will not assume any responsibility for
equipment damage resulting from condensate accumulation
on the unit’s electrical and/or mechanical components.
Unit Nameplate
A Mylar unit nameplate is located on the unit’s corner support
next to the filter access panel. It includes the unit model
number, serial number, electrical characteristics, refrigerant
charge, as well as other pertinent unit data.
Compressor Nameplate
The nameplate for the compressors are located on the side of
the compressor.
Unit Description
Before shipment, each unit is leak tested, dehydrated, charged
with refrigerant and compressor oil, and run tested for proper
control operation.
The condenser coils are aluminum fin, mechanically bonded to
copper tubing.
Direct-drive, vertical discharge condenser fans are provided
with built-in thermal overload protection.
The ReliaTel™ Control Module is a microelectronic control
system that is referred to as “Refrigeration Module” (RTRM).
The acronym RTRM is used extensively throughout this
document when referring to the control system network.
These modules through proportional/integral control
algorithms perform specific unit functions that governs unit
operation in response to; zone temperature, supply air
temperature, and/or humidity conditions depending on the
application. The stages of capacity control for these units is
achieved by starting and stopping the compressors.
The RTRM is mounted in the control panel and is factory wired
to the respective internal components. The RTRM receives
and interpret information from other unit modules, sensors,
remote panels, and customer binary contacts to satisfy the
applicable request for cooling.
Economizer Control Actuator (Optional)
The ECA monitors the mixed air temperature, return air
temperature, minimum position setpoint (local or remote),
power exhaust setpoint, CO2setpoint, CO2, and ambient dry
bulb/enthalpy sensor or comparative humidity (return air
humidity against ambient humidity) sensors, if selected, to
control dampers to an accuracy of +/- 5% of stroke. The
actuator is spring returned to the closed position any time that
power is lost to the unit. It is capable of delivering up to 25 inch
pounds of torque and is powered by 24 Vac.
RTCI - ReliaTel™ Trane®Communication
Interface (Optional)
This module is used when the application calls for an ICSTM
building management type control system. It allows the control
and monitoring of the system through an ICS panel. The
module can be ordered from the factory or ordered as a kit to
be field installed. Follow the installation instruction that ships
with each kit when field installation is necessary.
RLCI - ReliaTel™ LonTalk®Communication
Interface (Optional)
This module is used when the application calls for an ICSTM
building management type control system that is LonTalk®. It
allows the control and monitoring of the system through an ICS
panel. The module can be ordered from the factory or ordered
as a kit to be field installed. Follow the installation instruction
that ships with each kit when field installation is necessary.

General Information
RT-SVX23R-EN 9
RBCI - ReliaTel™ BACnet®Communications
Interface (Optional)
This module is used when the application calls for an open
BACnet®protocol. It allows the control and monitoring of the
system through an ICS panel. The module can be ordered from
the factory or as a kit to be field installed. Follow the installation
instructions that ships with each kit when field installation is
necessary.
RTOM – ReliaTel™ Options Module
The RTOM monitors the supply fan proving, clogged filter,
supply air temperature, exhaust fan setpoint, supply air
tempering, Frostat™ and smoke detector. Refer to system
input devices and functions for operation.
This module is standard on 10 tons products and 6 to 10 tons
high efficiency products.
System Input Devices and Functions
The RTRM must have a zone sensor or thermostat input in
order to operate the rooftop unit. The flexibility of having
several mode capabilities depends upon the type of zone
sensor thermostat selected to interface with the RTRM.
The descriptions of the following basic Input Devices used
within the RTRM network are to acquaint the operator with their
function as they interface with the various modules. Refer to
the unit’s electrical schematic for the specific module
connections.
The following controls are available from the factory for field
installation.
Supply Fan Failure Input (Optional)
The Fan Failure Switch can be connected to sense indoor fan
operation:
FFS (Fan Failure Switch) If air flow through the unit is not
proven by the differential pressure switch connected to the
RTRM (factory set point 0.07-in. w.c.) within 40 seconds
nominally, the RTRM will shut off all mechanical operations,
lock the system out, send a diagnostic to ICS, and the
SERVICE output will flash. The system will remain locked out
until a reset is initiated either manually or through ICS.
Clogged Filter Switch (Optional)
The unit mounted clogged filter switch monitors the pressure
differential across the return air filters. It is mounted in the filter
section and is connected to the RTOM. A diagnostic SERVICE
signal is sent to the remote panel if the pressure differential
across the filters is at least 0.5-in. w.c. The contacts will
automatically open when the pressure differential across the
filters decreases to approximately 0.4-in. w.c. The clogged
filter output is energized when the supply fan is operating and
the clogged filter switch has been closed for at least 2 minutes.
The system will continue to operate regardless of the status of
the filter switch.
Note: On units equipped with factory installed MERV 13
filters, a clogged filter switch with different pressure
settings will be installed. This switch will close when the
differential pressure is approximately 0.8' w.c. and
open when the differential falls to 0.7-in. w.c.
Condensate Drain Pan Overflow Switch
(Optional)
ReliaTel™ Option
This input incorporates the Condensate Overflow Switch
(COF) mounted on the drain pan and the ReliaTel™ Options
Module (RTOM). When the condensate level reaches the trip
point for 6 continuous seconds, the RTOM will shut down all
unit functions until the overflow condition has cleared. The unit
will return to normal operation after 6 continuous seconds with
the COF in a non-tripped condition. If the condensate level
causes unit shutdown more than 2 times in a 3 days period, the
unit will be locked-out of operation requiring manual reset of
diagnostic system through Zone Sensor or Building
Automation System (BAS). Cycling unit power will also clear
the fault.
Compressor Disable (CPR1/2)
This input incorporates the low pressure control (LPC) of each
refrigeration circuit and can be activated by opening a field
supplied contact installed on the LTB.
If this circuit is open before the compressor is started, the
compressor will not be allowed to operate. Anytime this circuit
is opened for 1 continuous second during compressor
operation, the compressor for that circuit is immediately turned
“Off”. The compressor will not be allowed to restart for a
minimum of 3 minutes should the contacts close.
If four consecutive open conditions occur during the first three
minutes of operation, the compressor for that circuit will be
locked out, a diagnostic communicated to the remote panel (if
installed), and a manual reset will be required to restart the
compressor.
Low Pressure Control
When the LPC is opened for 1 continuous second, the
compressor for that circuit is turned off immediately. The
compressor will not be allowed to restart for a minimum of 3
minutes.
If four consecutive open conditions occur during an active call
for cooling, the compressor will be locked out, a diagnostic
communicated to ICS™, if applicable, and a manual reset
required to restart the compressor. On dual compressor units
only the affected compressor circuit is locked out.
High Pressure Control
The high pressure controls are wired in series between the
compressor outputs on the RTRM and the compressor
contactor coils. If the high pressure control switch opens, the
RTRM senses a lack of current while calling for cooling and
locks the compressor out.

General Information
10 RT-SVX23R-EN
If four consecutive open conditions occur during an active call
for cooling, the compressor will be locked out, a diagnostic
communicated to ICS™, if applicable, and a manual reset
required to restart the compressor. On dual compressor units
only the affected compressor circuit is locked out.
Power Exhaust Control (Optional)
The power exhaust fan is started whenever the position of the
economizer dampers meets or exceed the power exhaust
setpoint when the indoor fan is on.
The setpoint panel is located in the return air section and is
factory set at 25%. The return airflow must be configured in
downflow orientation.
Lead/Lag Control (Dual Circuit Only)
Lead/Lag is a selectable input located on the RTRM. The
RTRM is configured from the factory with the Lead/Lag control
disabled. To activate the Lead/Lag function, simply cut the wire
connected to J3-8 at the RTRM. When it is activated, each time
the designated lead compressor is shut off due to the load
being satisfied, the lead compressor or refrigeration circuit
switches. When the RTRM is powered up, i.e. after a power
failure, the control will default to the number one circuit
compressor.
Zone Sensor Module (ZSM) (BAYSENS107*)
This electronic sensor features three system switch settings
(Heat, Cool, and Off) and two fan settings (On and Auto). It is
a manual changeover control with single setpoint. (Cooling
Setpoint Only).
Zone Sensor Module (ZSM) (BAYSENS109*)
This electronic sensor features four system switch settings
(Heat, Cool, Auto, and Off) and two fan settings (On and Auto).
It is a manual or auto changeover control with dual setpoint
capability. It can be used with a remote zone temperature
sensor BAYSENS077*.
Programmable Zone Sensor - (BAYSENS119*)
This 7 day programmable sensor features 2, 3 or 4 periods for
Occupied or Unoccupied programming per day. If the power is
interrupted, the program is retained in permanent memory. If
power is off for an extended period of time, only the clock and
day may have to be reset.
The zone sensor allows selection of 2, 3 or 4 system modes
(Heat, Cool, Auto, and Off), two fan modes (On and Auto). It
has dual temperature selection with programmable start time
capability.
The occupied cooling set point ranges between 45 and 98
degrees Fahrenheit. The heating set point ranges between 43
and 96 degrees Fahrenheit.
A liquid crystal display (LCD) displays zone temperature,
temperature set points, day of the week, time, and operational
mode symbols.
The Option Menu is used to enable or disable applicable
functions, i.e.; Morning Warm-up, Economizer minimum
position override during unoccupied status, Fahrenheit or
Centigrade, Supply air tempering, Remote zone temperature
sensor, 12/24 hour time display, Smart fan, and Computed
recovery.
During an occupied period, an auxiliary relay rated for 1.25
amps @ 30 volts AC with one set of single pole double throw
contacts is activated.
Status Inputs (4 Wires Optional). The ZSM can be wired to
receive four (4) operating status signals from the RTRM
(HEAT, COOL, SYSTEM “ON”, SERVICE). Four (4) wires from
the RTRM should be connected to the appropriate terminals
(7, 8, 9 and 10) on the ZSM.
Remote Zone Sensor (BAYSENS073*)
This electronic sensor features remote zone sensing and
timed override with override cancellation. It is used with a
Trane®Integrated Comfort™ building management system.
Remote Zone Sensor (BAYSENS074*)
This electronic sensor features single setpoint capability and
timed override with override cancellation. It is used with a
Trane®Integrated Comfort™ building management system.
Remote Zone Sensor (BAYSENS016*)
This bullet type temperature sensor can be used for; outside air
(ambient) sensing, return air temperature sensing, supply air
temperature sensing, remote temperature sensing
(uncovered). Wiring procedures vary according to the
particular application and equipment involved. Refer to the
unit’s wiring diagrams for proper connections.
Remote Zone Sensor (BAYSENS077*)
This electronic sensor can be used with BAYSENS106*, 108*,
110*, 119* Remote Panels. When this sensor is wired to a
BAYSENS119* remote panel, wiring must be 18 AWG shielded
twisted pair (Belden 8760 or equivalent). Refer to the specific
remote panel for wiring details.
Wireless Zone Sensor (BAYSENS050*)
This electronic sensor features five system settings (Auto, Off,
Cool, Heat, and Emergency Heat) and with On and Auto fan
settings. It is a manual or auto changeover control with dual
setpoint capability. Other features include a timed override
function, lockable system settings, and Fahrenheit or Celsius
temperature display. Included with the wireless zone sensor
will be a receiver that is to be mounted inside the unit, a
mounting bracket, and a wire harness.
High Temperature Sensor (BAYFRST001*)
This sensor connects to the RTRM Emergency Stop Input
located on the LTB and provides high limit “shutdown” of the
unit and requires a manual reset. The sensor is used to detect
high temperatures due to fire in the air conditioning or
ventilation ducts. The sensor is designed to mount directly to
the sheet metal duct. Each kit contains two sensors. The return
air duct sensor (X1310004001) is set to open at 135°F. The
supply air duct sensor (X1310004002) is set to open at 240°F.
The control can be reset after the temperature has been
lowered approximately 25°F below the cutout setpoint.

General Information
RT-SVX23R-EN 11
Evaporator Frost Control
This input incorporates the Frostat™ control (FOS) located on
the indoor coil and can be activated by closing a field supplied
contact installed in parallel with the FOS.
If this circuit is closed before the compressor is started, the
compressor will not be allowed to operate. Anytime this circuit
is closed for 1 continuous second during compressor
operation, the compressor for that circuit is immediately turned
“Off”. The compressor will not be allowed to restart for a
minimum of 3 minutes should the FOS open.
Frostat™ is standard on multi-speed indoor motors and single
zone VAV products (SZVAV).
Smoke Detector Sensor (Optional)
This sensor is only applicable on units equipped with a RTOM.
It provides high limit “shutdown” of the unit and requires a
manual reset. The sensor is used to detect smoke due to fire
in the air conditioning or ventilation ducts.
Important:
•The supply air smoke detector samples supply air. The
return and plenum air smoke detectors sample return air.
The smoke detectors are designed to shut off the unit if
smoke is sensed in the supply air stream or return air
stream. This function is performed by sampling the airflow
entering the unit at the return air opening. Follow the
instructions provided below to assure that the airflow
through the unit is sufficient for adequate sampling. Failure
to follow these instructions will prevent the smoke
detectors from performing it's design function.
•Airflow through the unit is affected by the amount of dirt and
debris accumulated on the indoor coil and filters. To insure
that airflow through the unit is adequate for proper
sampling by the return air smoke detector, complete
adherence to the maintenance procedures, including
recommended intervals between filter changes, and coil
cleaning is required.
•Periodic checks and maintenance procedures must be
performed on the smoke detector to insure that it will
function properly. For detailed instructions concerning
these checks and procedures, refer to the appropriate
section(s) of the smoke detector Installation and
Maintenance Instructions provided with the literature
package for this unit.
In order for the supply air smoke detector or return air smoke
detector to properly sense smoke in the supply air stream or
return air stream, the air velocity entering the smoke detector
unit must be between 500 and 4000 feet per minute.
Equipment covered in this manual will develop an airflow
velocity that falls within these limits over the entire airflow
range specified in the evaporator fan performance tables.
Phase Monitoring protection
Precedent units with 3-phase power are equipped with phase
monitoring protection as standard. These devices protect
motors and compressors against problems caused by phase
loss, phase imbalance, and phase reversal indication.
This sensor monitors voltage between the 3 conductors of the
3 phase power supply. Two LED lights are provided. The green
light indicates that a balanced 3 phase supply circuit is properly
connected. The red light indicates that unit operation has been
prevented. There are two conditions that will prevent unit
operation. The power supply circuit is not balanced with the
proper phase sequence of L1, L2, L3 for the 3 conductors of a
3 phase circuit. The line to line voltage is not between 180 volts
and 633 volts.
Human Interface - 5 Inch Color Touchscreen
(Optional)
The 5 inch Color Touchscreen Human Interface provides an
intuitive user interface to the rooftop unit that speeds up unit
commissioning, shortens unit troubleshooting times, and
enhances preventative maintenance measures. The human
interface includes several features including:
• Data trending capabilities by means of time series graphs.
• Historical alarm messages.
• Real-time sensor measurements.
• On board system setpoints.
• USB port that enables the downloading of component
runtime information as well as trended historical sensor
data.
• Customized reports.

12 RT-SVX23R-EN
Pre-Installation
WARNING
Fiberglass Wool!
Exposure to glass wool fibers without all necessary
PPE equipment could result in cancer, respiratory, skin
or eye irritation, which could result in death or serious
injury. Disturbing the insulation in this product during
installation, maintenance or repair will expose you to
airborne particles of glass wool fibers and ceramic
fibers known to the state of California to cause cancer
through inhalation.
You MUST wear all necessary Personal Protective
Equipment (PPE) including gloves, eye protection, a
NIOSH approved dust/mist respirator, long sleeves and
pants when working with products containing
fiberglass wool.
Precautionary Measures:
• Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes.Wear long
sleeved, loose-fitting clothing, gloves, and eye
protection.
• Wash clothes separately from other clothing; rinse
washer thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations
requiring additional respiratory protection. Use the
appropriate NIOSH approved respirator.
First Aid Measures:
• Eye Contact - Flush eyes with water to remove dust.
If symptoms persist, seek medical attention.
• Skin Contact -Wash affected areas gently with soap
and warm water after handling.
Precautionary Measures
• Avoid breathing fiberglass dust.
• Use a NIOSH approved dust/mist respirator.
• Avoid contact with the skin or eyes. Wear long-sleeved,
loose-fitting clothing, gloves, and eye protection.
• Wash clothes separately from other clothing: rinse washer
thoroughly.
• Operations such as sawing, blowing, tear-out, and
spraying may generate fiber concentrations requiring
additional respiratory protection. Use the appropriate
NIOSH approved respiration in these situations.
First Aid Measures
Eye Contact - Flush eyes with water to remove dust. If
symptoms persist, seek medical attention.
Skin Contact - Wash affected areas gently with soap and
warm water after handling.

RT-SVX23R-EN 13
Dimensions and Weights
Figure 1. Typical installation clearances for single and multiple unit applications
WSC036-048H, W/DHC036H Units WSC060H, WSC092-120H,
W/DHC048-120H Units

WARNING
Heavy Objects!
Failure to properly lift waterbox could result in death or
serious injury.
Each of the individual cables (chains or slings) used to
lift the waterbox must be capable of supporting the
entire weight of the waterbox. The cables (chains or
slings) must be rated for overhead lifting applications
with an acceptable working load limit. Refer to the
waterbox weights table.
WARNING
Improper Unit Lift!
Failure to properly lift unit in a LEVEL position could
result in unit dropping and possibly crushing operator/
technician which could result in death or serious injury,
and equipment or property-only damage.
Test lift unit approximately 24 inches (61 cm) to verify
proper center of gravity lift point. To avoid dropping of
unit, reposition lifting point if unit is not level.
Table 1. Maximum unit and corner weights (lbs) and center of gravity dimensions (in.)
Unit Maximum Model Weights(a)
(a) Weights are approximate.
Corner Weights(b)
(b) Corner weights are given for information only.
Center of Gravity (in.)
Tons Model No. Shipping Net A B C D Length Width
3WSC036H 612 507 144 122 110 130 32 21
4WSC048H 645 540 165 131 108 136 31 20
5WSC060H 777 682 228 177 114 163 38 22
7.5 WSC092H 894 796 252 204 163 177 41 23
8.5 WSC102H 927 829 286 183 195 164 40 23
10 WSC120H 948 850 303 170 218 159 40 24
3WHC036H 619 514 142 120 111 142 31 22
4WHC048H 768 673 222 175 114 162 38 22
5WHC060H 773 678 225 176 114 162 38 22
6WHC074H 927 829 193 295 65 276 38 22
7.5 WHC092H 927 829 193 295 65 276 38 22
8.5 WHC102H 953 855 199 306 67 283 39 22
10 WHC120H 1433 1228 357 343 259 269 49 27
3DHC036H 658 553 145 137 125 145 33 22
4DHC048H 845 750 234 192 146 178 40 23
5DHC060H 849 754 235 193 147 179 40 23
6DHC074H 990 892 216 324 69 283 39 21
7.5 DHC092H 1004 906 218 330 70 288 39 21
8.5 DHC102H 1016 918 220 336 70 292 39 21
10 DHC120H 1499 1294 402 313 290 289 47 28
Dimensions and Weights
14 RT-SVX23R-EN

Figure 2. Rigging and center-of-gravity data
Dimensions and Weights
RT-SVX23R-EN 15
Table 2. Factory installed options (fiops)/accessory net weights (lbs)(a) (b),
Accessory
WSC036H-048H,
W/DHC036H
Net Weight
3 to 4 Tons
WSC060H,
W/DHC048-060H
Net Weight
4 to 5 Tons
WSC092-120H,
W/DHC074-102H
Net Weight
6 to 10 Tons
W/DHC120H
Net Weight
10 Tons
460V/575V IDM Transformer(c)
(c) Applicable to W/DHC 460/575V units.
29 29 — —
Barometric Relief 710 10 10
Coil Guards 12 20 20 30
Economizer 26 36 36 36
Electric Heaters(d)
(d) Applicable to heat pump units only (W*C).
15 30 30 /44(e)
(e) Larger weight applies to units with variable speed fan.
50
Hinged Doors 10 12 12 12
Low Leak Economizer 68 93 93 93
Manual Outside Air Damper 16 26 26 26
Motorized Outside Air Damper 20 30 30 30
Oversized Motor 5 8 8 —
Powered Convenience Outlet 38 38 38 50
Powered Exhaust 40 80 80 80
Roof Curb 61 78 78 89
Smoke Detector, Supply 5 5 5 5
Smoke Detector, Return 7 7 7 7
Stainless Steel Heat Exchanger(f)
(f) Applicable to dual fuel units only (D*C).
4 6 — —
Through-the-Base Electrical 813 13 13
Through-the-Base Gas(f) 5 5 — —
Unit Mounted Circuit Breaker 5 5 5 5
Unit Mounted Disconnect 5 5 5 5
(a) Weights for options not listed are < 5 lbs.
(b) Net weight should be added to unit weight when ordering factory-installed accessories.

Figure 3. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency
Note: 2-in. electrical connection: single point power when heat installed 
(WSC, W/DHC)
EVAPORATOR SECTION
ACCESS PANEL
ALTERNATE
CONDENSATE DRAIN
3/4 - 14 NPT DIA. HOLE
1/2 NPT GAS CONNECTION
TOP PANEL
CONDENSER FAN
CONDENSER COIL
UNIT CONTROL WIRE
7/8” (22 MM) DIA. HOLE
SERVICE GAUGE PORT ACCESS
1 3/8” (35 MM) DIA. HOLE
UNIT CONTROL WIRE
2” (51 MM) DIA. HOLE
40 7/8”
1038 MM
4 1/4”
108 MM
69 7/8”
1749 MM
42 1/4”
1073 MM
23 9/16”
598 MM
5 5/8”
143 MM
9 5/8”
244 MM
CONTROL AND COMPRESSOR
ACCESS PANEL
44 1/4”
1124 MM
7 5/8”
194 MM
5 9/16”
141 MM
4 1/4”
108 MM
20 1/4”
514 MM
Figure 4. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - downflow airflow
supply/return - through-the-base utilities
THROUGH
THE BASE GAS
(Y_C/DHC MODELS ONLY)
THROUGH
THE BASE
ELECTRICAL
SUPPLY
RETURN
TBU CONDENSATE
3 5/8”
92 MM 14”
356 MM
9 1/4”
235 MM 15 1/2”
394 MM
4”
102 MM
24”
610 MM
18”
457 MM
27 9/16”
701 MM
4 3/16”
106 MM
4 9/16”
116 MM
23 1/2”
597 MM
2 13/16”
71 MM
6 1/2”
165 MM
3 11/16”
94 MM
4 7/8”
124 MM
5 1/16”
128 MM
9 15/16”
253 MM
Figure 5. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - horizontal airflow
supply/return
SUPPLY
RETURN
3/4-14 NPT
DRAIN CONNECTION
CONDENSER COIL
17 1/4”
438 MM 8 7/8”
225 MM
13 1/4”
337 MM
23 1/4”
591 MM
3 3/16”
81 MM
14 3/4”
375 MM
4 3/4”
121 MM
Figure 6. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - unit clearance and roof
opening
CLEARANCE 36” (914 MM)
CLEARANCE 48” (1219 MM)
TYPICAL ROOF OPENING
CLEARANCE 36” (914 MM)
CLEARANCE FROM
TOP OF UNIT 72”
CLEARANCE
HORIZONTAL FLOW - 18” (457 MM)
DOWNFLOW 36” (914 MM)
68 3/16”
1732 MM
40”
1016 MM
37”
940 MM
44 1/2”
1130 MM
Figure 7. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - roof curb
CLEARANCE 36” (914 MM)
CLEARANCE 36” (914 MM) FOR DOWNFLOW
CLEARANCE 18” (457 MM) FOR HORIZONTAL
CLEARANCE 36” (914 MM)
CLEARANCE 48” (1219 MM)
RETURN
SUPPLY
14”
356 MM
37 7/16”
951 MM 25 3/16”
640 MM
1 3/4”
44 MM
65 13/16”
1670 MM
1 3/4”
44 MM
14 9/16”
370 MM
8 3/8”
213 MM
61 13/16”
1568 MM 65 3/16”
1656 MM
16 3/4”
425 MM
2”
51 MM
2”
51 MM
40 7/8”
1038 MM
41 7/16”
1053 MM
17 7/8”
454 mm
Figure 8. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - downflow duct
connections - field fabricated
Note: Reference tabular information for duct clearance to combustible materials in
the application consideration chapter.
ALL FLANGES 1 1/4” (32 MM)
24 3/8”
(619 MM)
14 1/16”
(357 MM)
16 3/16”
(411 MM)
17 1/16”
(433 MM)
14”
(356 MM)
RETURN
SUPPLY
Dimensions and Weights
16 RT-SVX23R-EN

Figure 9. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - economizer, manual or
motorized fresh air damper; power exhaust
Dimensions extends to 16 1/2"/419 MM
when powered exhaust is coupled
with low leak economizer
6 3/16”
157 MM
16 1/2”
419 MM
16 1/4”
159 MM
12 1/2”
318 MM
Figure 10. Heat pump 3 to 4 tons standard efficiency, 
3 tons high efficiency - economizer and
barometric relief damper hood
6 15/16”
176 MM
9 1/8”
232 MM
Figure 11. Heat pump - 3 to 4 tons standard efficiency, 
3 tons high efficiency - swing diameter for
hinged door(s) option
17 7/8”
454 MM
16”
406 MM
22 1/4”
565 MM
Applicable to
Y_C models only
Figure 12. Heat pump - 5 tons standard efficiency, 
4 to 5 tons high efficiency
Note: 2-in. electrical connection: single point power when heat installed 
(WSC, W/DHC)
EVAPORATOR SECTION
ACCESS PANEL
ALTERNATE CONDENSATE DRAIN
CONNECTION 3/4 - 14 NPT DIA. HOLE
4 1/4”
108 MM
27 5/8”
701 MM
47 7/8”
1216 MM
88 5/8”
2251 MM
18 1/2”
470 MM
9 5/8”
244 MM
5 5/8”
143 MM
1/2 NPT GAS CONNECTION
[60 MBh, 80 MBh, 100 MBh, 120 MBh,
130 MBh (not applicable to DHC)]
3/4 NPT GAS CONNECTION
(130 MBh (DHC only), 150 MBh, 200 MBh, 250 MBh)
CONTROL AND COMPRESSOR
ACCESS PANEL
4 1/4”
104 MM
5 5/8”
143 MM
7 5/8”
194 MM
53 1/4”
1353 MM
TOP PANEL
CONDENSER FAN
CONDENSER COIL
UNIT CONTROL WIRE
7/8” (22 MM) DIA. HOLE
SERVICE GAUGE PORT ACCESS
1 3/8” (35 MM) DIA. HOLE
UNIT POWER WIRE
1 3/8” (35 MM) DIA. HOLE
Figure 13. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - downflow airflow
supply/return - through-the-base utilities
3 5/8”
92 MM
17 1/2”
444 MM
4”
102 MM
9 7/8”
251 MM
17 1/2”
444 MM
32 1/8”
816 MM
RETURN SUPPLY
33”
838 MM
4 1/8”
104 MM
27 5/8”
701 MM
THROUGH THE
BASE CONDENSATE
40 3/4”
1035 MM
THROUGH THE
BASE ELECTRICAL 5 7/8”
149 MM
5”
127 MM
10 7/8”
276 MM
3 3/4”
95 MM
2 3/4”
71 MM 6 1/2”
165 MM
Dimensions and Weights
RT-SVX23R-EN 17

Figure 14. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - horizontal
airflow supply and return
Supply
Return
Figure 15. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - unit clearance
and roof opening
CLEARANCE 36” (914 MM)
CLEARANCE FROM
TOP OF UNIT 72”
TYPICAL ROOF OPENING
CLEARANCE 48” (1219 MM) CLEARANCE 36” (914 MM)
CLEARANCE
HORIZONTAL FLOW - 18” (457 MM)
DOWNFLOW - 36” (914 MM)
53 1/4”
1352 MM
46”
1168 MM
46”
1168 MM
88 5/8”
2251 MM
Figure 16. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - roof curb
CLEARANCE 36” (914 MM)
CLEARANCE 36” (914 MM)
CLEARANCE 48” (1219 MM)
CLEARANCE 36” (914 MM) FOR DOWNFLOW
CLEARANCE 18” (457 MM) FOR HORIZONTAL
46 3/8”
1178 MM
1 3/4”
44 MM
46 3/8”
1178 MM
34 3/8”
873 MM
84 1/2”
2146 MM
2”
51 MM
34 3/8”
873 MM
1”
25 MM
49 7/8”
1267 MM
50 3/8”
1280 MM
2”
51 MM
83 7/8”
2130 MM
80 1/2”
2045 MM
18 1/2”
470 MM
1”
25 MM
6 5/8”
168 MM
18 1/4”
470 MM
1”
25 MM
RETURN
SUPPLY
Figure 17. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - downflow duct
connections field fabricated
Note: Reference tabular information for duct clearance to combustible materials in
the Installation chapter.
ALL FLANGES 1 1/4" (31 MM)
17 3/4”
451MM 17 3/4”
451MM
33 3/4”
857 MM
33 3/4”
857 MM
RETURN
SUPPLY
Figure 18. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - power exhaust
6 11/16”
170 MM 16 1/2”
419 MM
Figure 19. Heat pumps - 5 to 10 tons standard efficiency,
4 to 10 tons high efficiency - economizer,
manual or motorized fresh air damper
BAROMETRIC RELIEF HOOD
BAROMETRIC RELIEF HOOD
ECONOMIZER HOOD
ECONOMIZER HOOD
Dimensions extends to 21 5/8"/549 MM
Dimensions extends to 21 5/8"/549 MM
when powered exhaust is coupled
when powered exhaust is coupled
with low leak economizer
with low leak economizer
7 3/4”
7 3/4”
198 MM
198 MM
12”
12”
304 MM
304 MM
16 3/4”
16 3/4”
425 MM
425 MM
6 7/8”
6 7/8”
175 MM
175 MM
Dimensions and Weights
18 RT-SVX23R-EN

Figure 20. Heat pumps - 5 to 10 tons standard efficiency,
4 to 8.5 tons high efficiency - swing diameter
for hinged door(s) option
21 3/8”
543 MM
17”
432 MM
34 5/8”
879 MM
Applicable to
Y_C/DHC models only
Figure 21. Heat pump - 7.5 to 10 tons standard efficiency,
6 to 8.5 tons high efficiency
1/2 NPT GAS CONNECTION
(80 mbh, 120 mbh)
3/4 NPT GAS CONNECTION
(150 mbh, 200 mbh, 250 mbh)
(YC MODELS)
EVAPORATOR SECTION
ACCESS PANEL
ALTERNATE CONDENSATE DRAIN
CONNECTION 3/4 - 14 NPT DIA. HOLE
4 1/4”
108 MM
27 5/8”
701 MM
88 5/8”
2251 MM
47 7/8”
1216 MM
24 1/2”
622 MM
9 5/8”
244 MM
5 5/8”
143 MM
4 1/4”
108 MM
5 5/8”
143 MM
7 5/8”
194 MM
53 1/4”
1353 MM
CONDENSER COIL
UNIT CONTROL WIRE
7/8” (22 MM) DIA. HOLE
SERVICE GAUGE PORT ACCESS
1 3/8” (35 MM) DIA. HOLE
UNIT CONTROL WIRE
1 3/8” (35 MM) DIA. HOLE
46 7/8”
1190 MM
CONDENSER FAN
TOP PANEL
CONTROL AND COMPRESSOR
ACCESS PANEL
Figure 22. Heat pump - 10 tons high efficiency -
downflow airflow supply/return through-the-
base utilities
RETURNRETURN SUPPLYSUPPLY
3 5/8”3 5/8”
92 MM92 MM
17 1/2”17 1/2”
444 MM444 MM
9 7/8”9 7/8”
251 MM251 MM 17 1/2”17 1/2”
444 MM444 MM
32 1/8”32 1/8”
816 MM816 MM
33”33”
838 MM838 MM
4”4”
102 MM102 MM
THROUGH THETHROUGH THE
BASE ELECTRICALBASE ELECTRICAL
THROUGH THETHROUGH THE
BASE CONDENSATEBASE CONDENSATE
4 5/8”4 5/8”
119 MM119 MM
THROUGH THETHROUGH THE
BASE GASBASE GAS
5 7/8”5 7/8”
149 MM149 MM
27 5/8”27 5/8”
701 MM701 MM
42 3/16”42 3/16”
1072 MM1072 MM
6 3/8”6 3/8”
163 MM163 MM
2 3/4”2 3/4”
71 MM71 MM
51 3/16”51 3/16”
1316 MM1316 MM
4 1/8”4 1/8”
104 MM104 MM
Figure 23. Heat pump - 10 tons high efficiency
Note: 2-in. Electrical Connection: single point power when heat installed.
UNIT CONTROL WIRE
7/8” (22 MM) DIA. HOLE
CONTROL BOX SECTION
ACCESS PANEL
EVAPORATOR SECTION
ACCESS PANEL
ALTERNATE CONDENSATE DRAIN
CONNECTION 3/4 - 14 NPT DIA. HOLE
3/4 NPT GAS CONNECTION
(150 MBh, 200 MBh, 250 MBh)
27 5/8”
701 MM
47 7/8”
1216 MM
99 11/16”
2532 MM
63 3/16”
1605 MM
50 7/8”
1292 MM
UNIT POWER WIRE
1 3/8” (35 MM) DIA. HOLE
SERVICE GAUGE
PORT ACCESS
1 3/8” (35 MM) DIA. HOLE
COMPRESSOR ACCESS PANEL
CONDENSER COIL
OUTDOOR TOP PANEL
INDOOR TOP PANEL
Figure 24. Heat pump - 10 tons high efficiency - unit
clearance and roof opening
CLEARANCE 36” (914 MM)
CLEARANCE
HORIZONTAL FLOW - 18” (457 MM)
DOWNFLOW 36” (914 MM)
TYPICAL ROOF OPENING
CLEARANCE 36” (914 MM)
CLEARANCE 48” (1219 MM)
CLEARANCE FROM
TOP OF UNIT 72”
63 3/16”
1605 MM
46”
1168 MM
46”
1168 MM
99 11/16”
2532 MM
Figure 25. Heat pump - 10 tons high efficiency - roof curb
Note: 2-in. Electrical Connection: single point power when heat installed.
56 3/8”
56 3/8”
1432 MM
1432 MM
14”
14”
356 MM
356 MM
1 3/4”
1 3/4”
44 MM
44 MM
34 3/8”
34 3/8”
873 MM
873 MM
18 1/2”
18 1/2”
470 MM
470 MM
1”
1”
25 MM
25 MM
6 5/8”
6 5/8”
168 MM
168 MM
1”
1”
25 MM
25 MM
18 1/2”
18 1/2”
470 MM
470 MM
1”
1”
25 MM
25 MM
80 1/2”
80 1/2”
2045 MM
2045 MM
83 7/8”
83 7/8”
2130 MM
2130 MM
CLEARANCE 36” (914 MM) FOR DOWNFLOW
CLEARANCE 36” (914 MM) FOR DOWNFLOW
CLEARANCE 18” (457 MM) FOR HORIZONTAL
CLEARANCE 18” (457 MM) FOR HORIZONTAL
34 3/8”
34 3/8”
873 MM
873 MM
59 7/8”
59 7/8”
1521 MM
1521 MM
60 3/8”
60 3/8”
1534 MM
1534 MM
2”
2”
51 MM
51 MM
2”
2”
51 MM
51 MM
84 1/2”
84 1/2”
2146 MM
2146 MM
Dimensions and Weights
RT-SVX23R-EN 19

Figure 26. Heat pumps - 10 tons high efficiency -
downflow duct connections field fabricated
Note: Reference tabular information for duct clearance to combustible materials in
the application consideration chapter.
SUPPLY
RETURN
ALL FLANGES 1 1/4" (31 MM)
857 MM
857 MM
Figure 27. Heat pumps - 10 tons high efficiency - power
exhaust
Note: Reference tabular information.
5 5/8"
(143 MM) 21 5/8"
(549 MM)
ECONOMIZER HOOD
Figure 28. Heat pumps - 10 tons high efficiency -swing
diameter for hinged door(s) option
Dimensions and Weights
20 RT-SVX23R-EN