Trane TCD330B, TCD480B, TCD360B, TCD420B, TCD600B Installation & Operation Manual

Installation, Operation,
Maintenance

Voyager™ Commercial

27.5 to 50 Ton 60 Hz

22.9 to 41.7 Ton 50 Hz
CV or VAV Rooftop Air Conditioners
with ReliaTel™ Controls, R-410A Refrigerant

Model Numbers

“B” and later design sequence
TC*, TE*, YC*330B, 360B, 420B, 480B, 600B (60 Hz/3 phase)
TC*, TE*, YC*275B, 305B, 350B, 400B, 500B (50 Hz/3 phase)

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.

November 2010 RT-SVX34C-EN

Warnings, Cautions and Notices

Warnings, Cautions and Notices. Note that warnings, cautions and notices appear at

appropriate intervals throughout this manual. Warnings are provided to alert installing contractors
to potential hazards that could result in personal injury or death. Cautions are designed to alert
personnel to hazardous situations that could result in personal injury, while notices indicate a
situation that could result in equipment or property-damage-only accidents.

Your personal safety and the proper operation of this machine depend upon the strict observance
of these precautions.

ATTENTION: Warnings, Cautions and Notices appear at appropriate sections throughout

this literature. Read these carefully.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could

result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, could

result in minor or moderate injury. It could also be used to alert against unsafe practices.

NOTICE: Indicates a situation that could result in equipment or property-damage-only

accidents.

Important
Environmental Concerns!

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

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. 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.

Literature Change History

RT-SVN34B-EN (April 2010)

Updated issue of manual: provides specific installation, operation and maintenance instructions
for B and later design sequence on units with R-410A refrigerant.

RT-SVN34B-EN (January 2010)

Updated issue of manual: provides specific installation, operation and maintenance instructions
for B and later design sequence on units with R-410A refrigerant.

RT-SVN34A-EN (March 2009)

Original issue of manual: provides specific installation, operation and maintenance instructions for
A and later design sequence on units with R-410A refrigerant.

© 2010 Trane All rights reserved RT-SVX34C-EN

Overview of Manual

One copy of the appropriate service literature ships inside the control panel of each unit. The
procedures discussed in this manual should only be performed by qualified, experienced HVAC
technicians.

Note: 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.

This booklet describes the proper installation, startup, operation, and maintenance procedures for
TC_, TE_, and YC_22.9 to 50 Ton CV (Constant Volume) and VAV (Variable Air Volume) applications.
Refer to the table of contents for a listing specific topics. Refer to the "System Troubleshooting"
section at the end of this manual for troubleshooting information.

By carefully reviewing the information within this manual and following the instructions, the risk
of improper operation and/or component damage will be minimized.

It is important that periodic maintenance be performed to help assure trouble free operation. A
maintenance schedule is provided at the end of this manual. Should equipment failure occur,
contact a qualified service organization with qualified, experienced HVAC technicians to properly
diagnose and repair this equipment.

Warnings, Cautions and Notices

60 Hz units with standard options are certified by Underwriters Laboratory.

WARNING

Personal Protective Equipment (PPE) Required!

Installing/servicing this unit could result in exposure to electrical, mechanical and chemical
hazards.

• Before installing/servicing this unit, technicians MUST put on all Personal Protective
Equipment (PPE) recommended for the work being undertaken. ALWAYS refer to appropriate
MSDS sheets and OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals, ALWAYS refer to the appropriate MSDS
sheets and OSHA guidelines for information on allowable personal exposure levels, proper
respiratory protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put on all necessary Personal Protective
Equipment (PPE) in accordance with NFPA70E for arc/flash protection PRIOR to servicing the
unit.

Failure to follow recommendations could result in death or serious injury.

WARNIN G

Proper Field Wiring and Grounding Required!

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 electrical codes. Failure to follow codes could result in death or serious injury.

RT-SVX34C-EN 3

Table of Contents

Literature Change History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Overview of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

60 Hz Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

50 Hz Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Commonly Used Acronyms/Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

General Unit Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Gas Heat Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

About the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

First Aid Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Downflow Models Only: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

All Units: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Field Installed Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Unit Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Recommended Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Roof Curb and Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Horizontal Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Unit Rigging and Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Installation General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Condensate Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

O/A Sensor & Tubing Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Units with Statitrac™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Installation Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Disconnect Switch External Handle (Factory Mounted Option) . . . . . . . . . . 29

Main Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Thru-the-Base Electrical (Optional Accessory) . . . . . . . . . . . . . . . . . . . . . 30

Electrical Wire Sizing and Protection Device Equations . . . . . . . . . . . . . . . . 35

Low Voltage Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Control Power Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Field Installed AC Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Field Installed DC Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Remote Panels and Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4 RT-SVX34C-EN

Constant Volume Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Variable Air Volume Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Installation Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Connecting the Gas Supply Line to the Furnace Gas Train . . . . . . . . . . . 51

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Unit Control Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Microelectronic Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Variable Air Volume Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Constant Volume or Variable Air Volume Applications . . . . . . . . . . . . . . 63

Preparing the Unit for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Electrical Phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Voltage Supply and Voltage Imbalance . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Starting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Verifying Proper Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Verifying Proper Air Flow (CFM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Exhaust Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Economizer Damper Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Economizer (O/A) Dampers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Manual Fresh Air Damper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Starting the Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Starting 27.5 to 35 Ton Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Starting 40 to 50 Ton Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Scroll Compressor Operational Noises . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Compressor Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Charging by Subcooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Measuring Subcooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Gas Heat Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Electric Heat Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Final Unit Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

For Constant Volume Units; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

For Variable Air Volume Units; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Mechanical Cooling Sequence Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . 112

Dehumidification (Modulating Hot Gas Reheat) Sequence of Operation . 112

RT-SVX34C-EN 5

Units without an Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Economizer operation based on Dry Bulb . . . . . . . . . . . . . . . . . . . . . . . . 113

Economizer operation based on Reference Enthalpy . . . . . . . . . . . . . . 114

Economizer Operation based on Comparative Enthalpy . . . . . . . . . . . . 114

Gas Heat Sequence Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Electric Heat Sequence Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Low Pressure Control (LPC) Sequence of Operation (ReliaTel Control) . . 117

High Pressure Control and Temperature Discharge Limit
(ReliaTel Control)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Fan Belt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Monthly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Cooling Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Heating Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Fall Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Refrigerant Evacuation and Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Compressor Replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Electrical Phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Precision Suction Restrictor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

System Status/Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Terminal locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Diagnostics (CV units only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Diagnostics (VAV only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Resetting Cooling and Ignition Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . 131

Zone Temperature Sensor (ZSM) Service Indicator . . . . . . . . . . . . . . . . 132

RTRM Zone Sensor Module (ZSM) Test . . . . . . . . . . . . . . . . . . . . . . . . . 132

Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Test 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Programmable & Digital Zone Sensor Test . . . . . . . . . . . . . . . . . . . . . . 134

ReliaTel Refrigeration Module (RTRM) . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

ReliaTel Air Module (RTAM) Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Test 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Test 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Compressor—Blink Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

6 RT-SVX34C-EN

TR-1 and TR-200 VFD Programming Parameters . . . . . . . . . . . . . . . . . . 146

Unit Wiring Diagram Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Warranty and Liability Clause . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

COMMERCIAL EQUIPMENT RATED 20 TONS AND LARGER AND RELATED
ACCESSORIES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

RT-SVX34C-EN 7

Model Number Descriptions

60 Hz Description

Digit 1, 2 — Unit Function

TC = DX Cooling, No Heat
TE = DX Cooling, Electric Heat
YC = DX Cooling, Natural Gas Heat

Digit 3 — Unit Airflow Design

D = Downflow Configuration
H = Horizontal Configuration

Digit 4, 5, 6 — Nominal Cooling
Capacity

330 = 27½ Tons
360 = 30 Tons
420 = 35 Tons
480 = 40 Tons
600 = 50 Tons

Digit 7 — Major Development
Sequence

B = R-410A Refrigerant

Digit 8 — Power Supply1

E = 208/60/3
F = 230/60/3
4 = 460/60/3
5 = 575/60/3

Digit 9 — Heating Capacity4

0 = No Heat (TC only)
L = Low Heat (YC only)
H = High Heat (YC only)
J = Low Heat-Stainless Steel Gas

Heat Exchanger (YC only)

K = High Heat-Stainless Steel Gas

Heat Exchangers (YC only)

M = Low Heat-Stainless Steel Gas

Heat Exchanger w/
Modulating control
(27.5-35 ton YC only)

P = High Heat-Stainless Steel Gas

Heat Exchangers w/
Modulating control
(27.5-35 ton YC only)

R = Low Heat-Stainless Steel Gas

Heat Exchanger w/
Modulating control
(40-50 ton YC only)

T = High Heat-Stainless Steel Gas

Heat Exchangers w/
Modulating control
(40-50 ton YC only)

Note: When second digit is “E” for

Electric Heat, the following values
apply in the ninth digit.

A = 36 kW (27 kW for 208v)
B = 54 kW (41 kW for 208v)
C = 72 kW
D = 90 kW
E = 108 kW

Digit 10 — Design Sequence

A = First

Digit 11 — Exhaust

0= None
1 = Barometric Relief (Available

w/ Economizer only)

2 = 100% Power Exhaust Fan

(Available w/ Economizer only)

3 = 50% Power Exhaust Fan

(Available w/ Economizer only)

4 = 100% Fresh Air Tracking Power

Exhaust Fan (Available
w/ Economizer only)

5 = 50% Fresh Air Tracking Power

Exhaust Fan (Available
w/ Economizer only)

6 = 100% Power Exhaust w/

Statitrac™

6

Digit 12 — Filter

A = 2” Std Eff, Throwaway Filters
B = 2” MERV 8, High Eff, Throwaway

C = 4” MERV 8, High Eff, Throwaway

D = 4” MERV 14, High Eff, Throwaway

Filters

Filters

Filters

Digit 13 — Supply Fan Motor, HP

1= 7.5 Hp
2=10 Hp
3= 15 Hp
4 = 20 Hp

Digit 14 — Supply Air Fan Drive

3

Selections

A = 550 RPM H = 500 RPM
B = 600 RPM J = 525 RPM
C = 650 RPM K = 575 RPM
D = 700 RPM L = 625 RPM
E = 750 RPM M = 675 RPM
F = 790 RPM N = 725 RPM
G = 800 RPM

Digit 15 — Fresh Air Selection

A= No Fresh Air
B = 0-25% Manual Damper
C = 0-100% Economizer, Dry Bulb

D = 0-100% Economizer,

E = 0-100% Economizer,

F = “C” Option and Low Leak

G = “D” Option and Low Leak

H = “E” Option and Low Leak

Control

Reference Enthalpy Control

Differential Enthalpy Control

FreshAir Damper

Fresh Air Damper

Fresh Air Damper

Digit 16 — System Control

1 = Constant Volume
2 = VAV Supply Air Temperature

3 = VAV Supply Air Temperature

4 = VAV Supply Air Temperature

Control w/o Inlet Guide Vanes

Control w/Inlet Guide Vanes

Control w/Variable Frequency

5 = VAV Supply Air Temperature

Note: Zone sensors are not included

Drive w/o Bypass

Control w/Variable Frequency
Drive and Bypass

with option and must be ordered
as a separate accessory.

Miscellaneous Options

Digit 17

A = Service Valves

2

Digit 18

B = Through the Base Electrical

Provision

Digit 19

C = Non-Fused Disconnect Switch

with External Handle

Digit 20

D= Factory-Powered 15A GFI

Convenience Outlet and
Non-Fused Disconnect Switch
with External Handle

Digit 21

E = Field-Powered 15A GFI

Convenience Outlet

Digit 22

F = Trane Communication

Interface (TCI)

Digit 23

G = Ventilation Override

Digit 24

H = Hinged Service Access

Digit 25

H = Tool-less Condenser Hail Guards
J = Condenser Coil Guards

Digit 26

K = LCI (LonTalk)
B = BACnet Communications

Interface (BCI)

Digit 27

* = Unused Digit

Digit 28

M = Stainless Steel Drain Pans

Digit 29 — Condenser Coil
Options

0 = Standard Efficiency

N = Standard Efficiency

Condenser Coil

Condenser Coil with Black
Epoxy Pre-Coating

Digit 30-31 — Miscellaneous
Options

8 RT-SVX34C-EN

Model Number Descriptions

P = Discharge Temperature

Sensor

R = Clogged Filter Switch

Digit 32 — Dehumidification
Option

T = Modulating Hot Gas Reheat

Model Number Notes

1. All voltages are across the line
starting only.

2. Option includes Liquid, Discharge,
Suction Valves.

3. Supply air fan drives A thru G are
used with 27½-35 ton units only and
drives H thru N are used with 40 & 50
ton units only.

4. Electric Heat KW ratings are based
upon voltage ratings of 208/240/480/
600 V. For a 240 V heater derated to
208 V, the resulting kW rating
decreases from 36 kW to 27 kW, and
from 54 kW to 41 kW. Voltage
offerings are as follows: (see Tabl e 19,

p. 47 for additional information):

Electric

Heater

Rated

Tons

VoltageKW27/36 41/54 72 90 108

208 x x

27½

to 35

240 x x

480 x x x x

600 x x x

208 x

40

240 x

and

480 x x x x

50

600 x x x x

5. The service digit for each model
number contains 32 digits; all 32
digits must be referenced.

6. Ventilation override exhaust mode is
not available for the exhaust fan with
fresh air tracking power exhaust. VOM
is available for the exhaust fan
without fresh air tracking power
exhaust.

RT-SVX34C-EN 9

Model Number Descriptions

50 Hz Description

Digits 1, 2 – Unit Function

TC = DX Cooling, No Heat
TE = DX Cooling, Electric Heat
YC = DX Cooling, Natural Gas Heat

Digit 3 – Unit Airflow Design

D = Downflow Configuration
H = Horizontal Configuration

Digits 4, 5, 6 – Nominal Cooling

D = 4” (102 MM) MERV 14, High Eff,

Digit 13 – Supply Fan Motor, HP

1 = 7.5 Hp (5.6 kW)
2 = 10 Hp (7.5 kW)
3=15 Hp (10 kW)
4 = 20 Hp (15 kW)

Digit 14 – Supply Air Fan Drive
Selections

Capacity

275 = 22.9 Tons (82 kW)
305 = 25.4 Tons (89 kW)
350 = 29.2 Tons (105 kW)
400 = 33.3 Tons (120 kW)
500 = 41.7 Tons (148 kW)

Digit 7 – Major Development
Sequence

B = R-410A Refrigerant

Digit 8 – Power Supply1

C = 380/50/3
D = 415/50/3

Digit 9 – Heating Capacity4

0 = No Heat (TC only)
L = Low Heat (YC only)
H = High Heat (YC only)

Note: When second digit is “E” for

Electric Heat, the following values
apply in the ninth digit.

380V / 415V

A = 23 kW / 27 kW
B = 34 kW / 40 kW
C = 45 kW / 54 kW
D = 56 kW / 67 kW
E = 68 kW / 81 kW

Digit 10 – Design Sequence

A= First

Digit 11 – Exhaust6

0= None
1 = Barometric Relief (Available

w/ Economizer only)

2 = 100% Power Exhaust Fan

(Available w/ Economizer only)

3 = 50% Power Exhaust Fan

(Available w/ Economizer only)

4 = 100% Fresh Air Tracking Power

Exhaust Fan (Available
w/ Economizer only)

5 = 50% Fresh Air Tracking Power

Exhaust Fan (Available
w/ Economizer only)

6 = 100% Power Exhaust w/

Statitrac™

Digit 12 – Filter

A = 2” (51 MM) Std Eff, Throwaway

Filters

B = 2” (51 MM) MERV 8, High Eff,

Throwaway
Filters

C = 4” (102 MM) MERV 8, High Eff,

10 RT-SVX34C-EN

Digit 15 – Fresh Air Selection

A= No Fresh Air
B = 0-25% Manual Damper
C = 0-100% Economizer, Dry Bulb

D = 0-100% Economizer,

E = 0-100% Economizer,

F = “C” Option and Low Leak

G = “D” Option and Low Leak

H = “E” Option and Low Leak

Digit 16 – System Control

1 = Constant Volume
2 = VAV Supply Air Temperature

3 = VAV Supply Air Temperature

Note: Zone sensors are not included

Miscellaneous Options

Digit 17

A = Service Valves

Digit 18

B = Through the Base Electrical

Digit 19

C = Non-Fused Disconnect Switch

Digit 20

D = Factory-Powered 15A GFI

Digit 21

E=Field-Powered 15A GFI

Digit 22

Throwaway Filters

Throwaway Filters

3

A = 458 RPM H = 417 RPM
B = 500 RPM J = 437 RPM
C = 541 RPM K = 479 RPM
D = 583 RPM L = 521 RPM
E = 625 RPM M = 562 RPM
F = 658 RPM N = 604 RPM
G = 664 RPM

Control

Reference Enthalpy Control

Differential Enthalpy Control

Fresh Air Damper

Fresh Air Damper

Fresh Air Damper

Control w/o Inlet Guide Vanes

Control w/Inlet Guide Vanes

with option and must be ordered
as a separate accessory.

2

Provision

with External Handle

Convenience Outlet and
Non-Fused Disconnect Switch
with External Handle

Convenience Outlet

F = Trane Communication

Interface (TCI)

Digit 23

G = Ventilation Override

Digit 24

H = Hinged Service Access

Digit 25

H = Tool-less Condenser Hail Guards
J = Condenser Coil Guards

Digit 26

K = LCI (LonTalk)
B = BACnet Communications

Interface (BCI)

Digit 27

* = Unused Digit

Digit 28

M = Stainless Steel Drain Pans

Digit 29 — Condenser Coil
Options

0 = Standard Efficiency

Condenser Coil

N = Standard Efficiency

Condenser Coil with Black
Epoxy Pre-Coating

Digit 30-31 — Miscellaneous
Options

P = Discharge Temperature

Sensor

R = Clogged Filter Switch

Digit 32 — Dehumidification
Option

T = Modulating Hot Gas Reheat

Model Number Notes

1. All voltages are across-the-line
starting only.

2. Option includes Liquid, Discharge,
Suction Valves.

3. Supply air fan drives A thru G are
used with 22.9-29.2 ton (82-105 kW)
units only and drives H thru N are
used with 33.3 and 41.7 ton (120-148
kW) units only.

4. Electric Heat kW ratings are based
upon voltage ratings of 380/415 V.
Heaters A, B, C, D are used with 22.9-

29.2 ton (82-105 kW) units only and
heaters B, C, D, E are used with 33.3-

41.7 ton (120-148 kW) units only.

5. The service digit for each model
number contains 32 digits; all 32
digits must be referenced.

6. Ventilation override exhaust mode is
not available for the exhaust fan with
fresh air tracking power exhaust. VOM
is available for the exhaust fan
without fresh air tracking power
exhaust.

General Information

Commonly Used Acronyms/Abbreviations

BAS = Building Automation System

CFM = Cubic Feet per Minute

CLV = Cooling Valve (Reheat only)

COMM = Module Designation for TCI/LCI

CV = Constant Volume

CW = Clockwise

CCW = Counterclockwise

DSP = Direct Space Pressure control

DTS = Discharge Air Sensor

DWU = Daytime Warm-up

E/A = Exhaust Air

ECA = Economizer Actuator

EET = Entering Evaporator Temperature Sensor

F/A = Fresh Air

FFS = Fan Failure Swi tc h

ICS = Integrated Comfort System (See BAS)

IDM = Indoor Fan Motor

IGV = Inlet Guide Vanes

I/O = Input/Output

IOM = Installation, Operation and Maintenance manual (Ships with each unit)

LCI = LonTalk® Communication Interface

LCI-R = LonTalk Communication Interface with ReliaTel

LH = Left Hand

MAS = Mixed Air Sensor

MAT = Mixed Air Temperature

MWU = Morning Warm Up

NSB = Night Setback (programmable ZSM BAYSENS119*)

O/A = Outside Air

OAH = Outside Air Humidity

OAT = Outside Air Temperature

PGA = Power Exhaust Actuator

PSIG = Pounds Per Square Inch Gauge pressure

PHM = Phase monitor

R/A = Return Air

RAH = Return Air Humidity

RAT = Return Air Temperature sensor

RH = Right Hand

RHP = Reheat Pumpout Solenoid

RHV = Reheat Valve

RLP = Reheat Low Pressure Cutout

RPM = Revolutions Per Minute

RTAM = ReliaTel Airhandler Mo dule

RTDM = ReliaTel Dehumidification Module

RTVM = ReliaTel Ventilation Module

RT-SVX34C-EN 11

General Information

RTOM = ReliaTel Options Module

RTRM = ReliaTel Refrigeration Module

S/A = Supply Air

SPC = Space Pressure Calibration Solenoid

SPP = Space Pressure Transducer

SPT = Static Pressure Transducer

TCI = Trane Communication Interface

TCO = Temperature Cutout

TDL = Temperature Discharge Limit

VAV = Variable Air Volume

VFD = Variable Frequency Drive

VHR = Ventilation Heat Relay (VAV box relay)

W.C. = Wa t e r Colu m n

XFSP = Exhaust Fan Setpoint

ZSM = Sensor, Zone Sensor, Zone Sensor Module, Zone Panel

About the Unit

Overall unit dimensional data is illustrated in Figure 1, p. 17 to Figure 9, p. 22. Each package rooftop
unit ships fully assembled and charged with the proper refrigerant quantity from the factory. They
are controlled by a microelectronic unit control processor. Several solid state modules are grouped
to form the "Control System". The number of modules within any given control system will be
dependent upon the options and accessories ordered with the unit. Acronyms are used extensively
throughout this manual when referring to the "Control System" (see acronyms/abbreviations
previous page).

Basic unit components include:

• Scroll compressors

• One (1) Intertwined Evaporator Coil

• One (1) Intertwined Condenser Coil

• One (1) Supply Fan

• Three (3) to Four (4) Condenser Fans

• Filters (type is dependent on option selection)

Precautionary Measures

WARNIN G

Fiberglass Wool!

Product contains fiberglass wool. 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. Glass wool fibers may
also cause respiratory, skin or eye irritation.

- 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.

12 RT-SVX34C-EN

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.

An optional roof curb, specifically designed for the Voyager commercial rooftop units is available
from Trane. The roof curb kit must be field assembled and installed according to the latest edition
of the curb installation guide.

Unit Inspection

As soon as the unit arrives at the job site:

• Verify that the nameplate data corresponds to the sales order and bill of lading (including

• Visually inspect the exterior of the unit, including the roof, for physical signs of shipping

• Check for material shortages. Figure 11 on page 23 illustrates where "ship with" items are

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. Do
not install a damaged unit without the Appropriate Trane sales representative's approval!

• Visually check the internal components for shipping damage as soon as possible after delivery

General Information

electrical data).

damage.

placed inside the unit.

and before it is stored. Do not walk on the sheet metal base pans.

Storage

WARNIN G

No Step Surface!

Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the supporting
metal to collapse. Failure of the drain pan could result in death or serious injury.

Bridging between the unit's main supports may consist of multiple 2 by 12 boards or sheet metal
grating.

• If concealed damage is discovered, notify the carrier's terminal office 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 the 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.

Take precautions to prevent condensate formation inside the unit electrical components and
motors when:

a. The unit is stored before it is installed; or,

b. 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.

Do not use the unit heater as temporary heat without completing the startup procedures detailed
under "Unit startup".

Trane will not assume responsibility for equipment damage resulting from accumulation of
condensate on the unit electrical components.

RT-SVX34C-EN 13

Pre-Installation

The checklist listed below is a summary of the steps required to successfully install a Voyager
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.

General Unit Requirements

Downflow Models Only:

• An optional roof curb, specifically designed for the Voyager commercial rooftop units is
available from Trane. The roof curb kit must be field assembled and installed according to the
latest edition of the curb installation guide.

• Assemble and install the roof curb, including necessary gaskets. Make sure the curb is level.

• Install and secure the ductwork to the curb.

All Units:

• Check unit for shipping damage and material shortage. (Refer to "Unit inspection" section).

• Rigging the unit. Refer to Figure 12, p. 24.

• Placing the unit on curb; check for levelness. See “Roof Curb and Ductwork” on page 16.

• Ensure that the unit-to-curb seal is tight and without buckles or cracks.

• Install an appropriate drain line to the evaporator condensate drain connections, as required.
Refer to Figure 14, p. 29.

• Service Valve Option; See “Starting the Compressor” on page 98.

• Return/Fresh-air damper adjustment. Refer to “Economizer Damper Adjustment” on page 94.

• Exhaust Fan Damper Stop Adjustment. Refer to Exhaust Damper Adjustment figures,
beginning with Figure 46, p. 103.

Electrical Requirements

(See Figure 18, “Typical Field Power Wiring,” on page 34.)

• Verify that the electrical power supply characteristics comply with the unit nameplate
specifications.

• 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 power terminal block HTB1, or to the optional unit-mounted disconnect
switch.

WARNIN G

Proper Field Wiring and Grounding Required!

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 electrical codes. Failure to follow codes could result in death or serious injury.

• Properly ground the unit.

14 RT-SVX34C-EN

Field Installed Control Wiring

(Figure 19, p. 41 and Figure 20, p. 42.)

Important: All field-installed wiring must comply with NEC and applicable local codes.

• Complete the field wiring connections for the constant volume controls as applicable. Refer to

“Low Voltage Wiring” on page 39 for guidelines.

the

• Complete the field wiring connections for the variable air volume controls as applicable. Refer
to the “Low Voltage Wiring” on page 39 for guidelines.

Gas Heat Requirements

(See “Installation Piping” on page 53.)

• Gas supply line properly sized and connected to the unit gas train.

• 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.

Pre-Installation

RT-SVX34C-EN 15

Unit Dimensions and Weights

Recommended Clearances

Adequate clearance around and above each Voyager Commercial unit is required to ensure proper
operation and to allow sufficient access for servicing.

If the unit installation is higher than the typical curb elevation, a field constructed catwalk around
the unit is recommended to provide safe, easy access for maintenance and servicing. Table 1, p. 23
lists the recommended clearances for single and multiple unit installation. These clearances are
necessary to assure adequate serviceability, cataloged capacities, and peak operating efficiency.

If the clearances available on the job site appear to be inadequate, review them with your Trane
sales representative.

Roof Curb and Ductwork

The curbs for the 27.5 to 50 Ton commercial rooftop units enclose the entire unit base area. They
are referred to as "full perimeter" type curbs.

Step-by-step instructions for the curb assembly and installation with curb dimensions and curb
configuration for "A", "B", and "C" cabinets ship with each Trane accessory roof curb kit. (See the
latest edition of the curb installation guide) Follow the instructions carefully to assure proper fit
when the unit is set into place.

The S/A and R/A ductwork adjoining the roof curb must be fabricated and installed by the installing
contractor before the unit is set into place. Trane curbs include flanges around the openings to
accommodate duct attachment.

Ductwork installation recommendations are included in the instruction booklet that ships with each
Trane accessory roof curb kit.

Note: For sound consideration, cut only the holes in the roof deck for the supply and return duct

penetration. Do Not remove the roof decking from the inside perimeter of the curb.

If a Trane curb accessory kit is not used:

Horizontal Ductwork

When attaching the ductwork to a horizontal unit, provide a water tight flexible connector at the unit
to prevent noise transmission from the unit into the ductwork. Refer to figures beginning on page

17 for the S/A and R/A opening dimensions.

All outdoor ductwork between the unit and the structure should be weather proofed after
installation is completed.

If optional power exhaust is selected, an access door must be field-installed on the horizontal return
ductwork to provide access to exhaust fan motors.

a. The ductwork can be attached directly to the S/A and R/A openings. Be sure to use a flexible

duct connector at the unit.

b. For "built-up" curbs supplied by others, gaskets must be installed around the curb perimeter

flange, S/A opening, and R/A openings.

c. Insulation must be installed on the bottom of the condenser section of the unit.

16 RT-SVX34C-EN

Unit Dimensions and Weights

1 1/4
(32)

3 1/4
(81)

Figure 1. 60 Hz 27½-35, 50 Hz 23-29 Tons (TC, TE, YC Low Heat)

Figure 2. Rear view showing duct openings for horizontal units

RT-SVX34C-EN 17

Unit Dimensions and Weights

NOTES:

1. SEE DETAIL HOOD DRAWING FOR HORIZONTAL /
DOWNFLOW UNITS FOR ADDITIONAL DIMENSION
AND LOCATION.

179 3/4"

4565.65mm

42"

1066.8mm

83 13/16"

2128.8mm

90 1/16"

2287.5mm

180 5/16"

4579.9mm

90 3/8"

2295.5mm

5 3/8"

136.5mm

7 9/16"

192.1mm

3.25 [82.55mm] TO TOP OF FAN GRILLE

70 7/16"

1789.1mm

40 3/16"

1020.7mm

6 7/8"

174.6mm

1 1/4" [31.7mm]
FEMALE

PVC PIPE

3/4" [19.0mm] NPT
GAS INLET

SEE NOTE 2

CUSTOMER
CONNECTION POINT

191

Figure 3. 60 Hz 27½-35, 50 Hz 23-29 Tons (TC, TE, YC Low Heat)

Note: Dimensions in ( ) are mm, 1”= 25.4 mm.

Figure 4. 60 Hz 27½-35, 50 Hz 23-29 Tons (YC High Heat)

18 RT-SVX34C-EN

Unit Dimensions and Weights

Figure 5. Duct openings, 60 Hz 27½-35, 50 Hz 23-29 Tons (YC High Heat)

3 1/4
(81)

1 1/4
(32)

Figure 6. 60 Hz 27½-35, 50 Hz 23-29 Tons (YC High Heat)

90 5/8"

2301.8mm

208 1/16"

5284.7mm

SEE NOTE 2

NOTES:

1. SEE ROOFCURB DRAWING FOR DETAILS
ON FIELD DUCT FITUP AND CONNECTIONS

2. SEE DETAIL HOOD DRAWING FOR HORIZONTAL /
DOWNFLOW UNITS FOR ADDITIONAL DIMENSION
AND LOCATION.

3.25 [82.55mm] TO
TOP OF FAN GRILLE

1 1/4" [31.7mm]

PVC PIPE FEMALE

Note: Dimensions in ( ) are mm, 1”= 25.4 mm.

RT-SVX34C-EN 19

42"

1066.8mm

2128.8mm

1" [25.4MM] NPT
GAS INLET

83 13/16"

5 3/8"

136.5m

7 9/16"

192.1m

207 1/2"

5270.5mm

CUSTOMER
CONNECTION POINT

40 3/16"

1020.7mm

6 15/16"

174.6mm

90 1/16"

2287.5mm

70 7/16"

1789.1mm

Unit Dimensions and Weights

1 1/4
(32)

3 1/4
(81)

Figure 7. 60 Hz 40-50, 50 Hz 33-42 Tons (TC, TE, YC Low and High Heat)

Figure 8. Duct openings, 60 Hz 40-50, 50 Hz 33-42 Tons

(TC, TE, YC Low and High Heat)

20 RT-SVX34C-EN

Unit Dimensions and Weights

7 9/16"

232 3/8"

5902.3mm

232 3/4"

5911.8mm

90 5/8"

49 9/16"

1258.8mm

93 3/8"

2371.7mm

5 5/16"

90 1/16"

77"

1955.8mm

46 15/16"

1192.2mm

4 3/4"

120.6mm

NOTES:

1. SEE ROOFCURB DRAWING FOR DETAILS
ON FIELD DUCT FITUP AND CONNECTIONS

2. SEE DETAIL HOOD DRAWING FOR HORIZONTAL /
DOWNFLOW UNITS FOR ADDITIONAL DIMENSION
AND LOCATION.

SEE NOTE 2

CUSTOMER
CONNECTION POINT

2301.8mm

PVC PIPE FEMALE

1" [25.4MM] NPT
HIGH HEAT GAS INLET

2287.5mm

136.5m

192.1m

3.25 [82.55mm] TO
TOP OF FAN GRILLE

1 1/4" [31.7mm]

3/4" [19MM] NPT
LOW HEAT GAS INLET

Figure 9. 60 Hz 40-50, 50 Hz 33-42 Tons (TC, TE, YC Low and High Heat)

Note: Dimensions in ( ) are mm, 1”= 25.4 mm.

Figure 10. Fresh Air and Power Exhaust Dimensions for TC*, TE*, and YC* Units

RT-SVX34C-EN 21

Unit Dimensions and Weights

Figure 11. Location of "Ship With" Items for TC*, TE*, and YC* Units

Unit Rigging and Placement

WARNIN G

Heavy Objects!

Do not use cables (chains or slings) except as shown. Each of the cables (chains or slings) 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. Other lifting
arrangements may cause equipment or property-only damage. Failure to properly lift unit may
result in death or serious injury.

Use spreader bars as shown in the diagram. Refer to the Installation manual or nameplate for unit
weight. Refer to the Installation instructions located inside the control panel for further rigging
information.

1. Verify that the roof curb has the proper gaskets installed and is level and square to assure an
adequate curb-to-unit seal.

The units must be as level as possible in order to assure proper condensate flow out of the unit.
The maximum side-to-side and end-to-end slope allowable in any application is listed in

Table 2, p. 23.

22 RT-SVX34C-EN

Unit Dimensions and Weights

Figure 12. Unit Rigging

Table 1. Minimum Operating Clearances Installation (Horizontal and Downflow Configurations)

Recommended Clearances

Single Unit

TC*, TE*, YC*

27.5 to 50 Tons

Exhaust End

6 Feet 8 Feet 4 Feet

Distance Between Units

Economizer/

Economizer/

Multiple Unit

TC*, TE*, YC*

27.5 to 50 Tons

(a) Condenser coil is located at the end and side of the unit.

Exhaust End End/Side Service Side Access

12 Feet 16 Feet 8 Feet

Condenser Coil

Orientation End/Side

(a)

Service Side Access

Table 2. Maximum Slope

Cabinet End to End (inches) Side to Side (inches)

"A" (27.5 - 35 Ton Low Heat) 3 1/2 1 5/8

"B" (27.5 - 35 Ton High Heat) 4 1 5/8

"C" (All 40 and 50 Ton Units) 4 1/2 1 5/8

Note: Do not exceed these allowances. Correct the improper slope by building up the curb base. The material used to raise

the base must be adequate to support both the curb and the unit weight.

RT-SVX34C-EN 23

Unit Dimensions and Weights

X

Y

Z (see note 2)

Figure 13. Center of Gravity

Table 3. Center of Gravity

1

Center-of-Gravity (inches)

Unit Model

YC Low Heat

Dimension

YC High Heat

Dimension TC/TE Dimension

X Y Z X Y Z X Y Z

***330/275* 41 76 33 41 84 33 42 76 33

***360/305* 43 77 33 43 85 33 44 77 33

***420/350* 42 78 33 42 86 33 43 78 33

***480/400* 42 111 35 42 111 35 42 111 35

***600/500* 43 108 35 43 108 35 43 108 35

Note: Center-of-gravity dimensions are approximate, and are based on the unit equipped with: standard

efficiency coils, standard efficiency motors, economizer, inlet guide vanes, and throwaway filters

Note: Z dimension is upward from the base of the unit.

Example:
Locating the center-of-gravity for a YC-360 MBH High Heat unit with 100% exhaust.
X = 43 inches inward from the control panel side
Y = 85 inches inward from the compressor end
Z = 33 inches upward from the base

Table 4. Approximate Units Operating Weights — lbs./kg1

Basic Unit Weights1

Unit

Model

**D330/275 3750 1701 4130 1873 3620 1642 3640 1651

**H330/275 3790 1719 4220 1914 3660 1660 3680 1669

**D360/305 3845 1744 4225 1916 3715 1685 3735 1694

**H360/305 3885 1762 4315 1957 3755 1703 3775 1712

**D420/350 3970 1801 4350 1973 3840 1742 3860 1751

**H420/350 4010 1819 4440 2014 3880 1760 3900 1769

**D480/400 4764 2161 4884 2215 4539 2059 4564 2070

**H480/400 4859 2204 4984 2261 4599 2091 4634 2102

**D600/500 5174 2347 5294 2401 4949 2245 4974 2256

**D600/500 5269 2390 5394 2447 5019 2277 5044 2288

Notes:

1. Basic unit weight includes minimum horsepower supply fan motor.

YC

Low Heat

YC

High Heat TC TE

24 RT-SVX34C-EN

Unit Dimensions and Weights

DE F

TOP VIEW
OF UNIT

COMPRS

CBA

Table 5. Point Loading Average Weight1,2 — lbs./kg

Model A B C D E F

**D330/275 846 384 688 313 743 337 745 338 604 275 503 228

**H330/275 867 393 707 321 767 348 753 342 613 279 513 233

**D360/305 836 379 680 309 779 353 741 336 621 285 568 258

**H360/305 897 407 696 316 766 348 729 330 590 268 636 288

**D420/350 892 405 692 314 779 353 765 347 633 288 590 268

**H420/350 867 393 869 395 690 313 758 344 601 273 654 297

**D480/400 820 372 856 388 937 425 742 336 762 346 769 349

**H480/400 841 381 876 397 957 434 754 342 775 352 782 355

**D600/500 894 406 955 428 970 440 756 343 862 391 866 393

**H600/500 915 415 966 438 990 449 768 348 875 397 879 399

Notes:

1. Point Loading is identified with corner A being the corner with the compressors. As you
move clockwise around the unit as viewed from the top, mid-point B, corner C, corner D,
mid-point E and corner F.

2. Point load calculations provided are based on the unit weight for YC high heat gas models.

Table 6. Approximate Operating Weights1— Optional Components — lbs./kg

Unit

Model

**D330/275 110/50 165/74 50/23 260/117 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**H330/300 145/65 200/90 50/23 285/128 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**D360/305 110/50 165/74 50/23 260/117 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**H330/305 145/65 200/90 50/23 285/128 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**D420/350 110/50 165/74 50/23 260/117 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**H420/350 145/65 200/90 50/23 285/128 55/25 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**D480/400 110/50 165/74 50/23 290/131 70/32 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**H480/400 145/65 200/90 50/23 300/135 70/32 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**D600/500 110/50 165/74 50/23 290/131 70/32 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**H600/500 145/65 200/90 50/23 300/135 70/32 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

Note:

1. Basic unit weight includes minimum horsepower supply fan motor.

Baro.

Relief

Power

Exhaust

0-25%

Man

Damper Econ.

RT-SVX34C-EN 25

Inlet
Guide
Vanes

Var. Freq.

Drives (VFD’s)

Bypass Lo Hi

Valves

Serv

Thru-

the
base
Elec.

Non-

Fused

Discon.

Switch

Factory.

GFI with

Discon.

Switch

Roof CurbW/O With

Installation General Requirements

Condensate Drain Connection

Each commercial rooftop unit is equipped with one (1) 1-1/4 inch Female PVC condensate drain
connection.

Refer to Figure 11, p. 23 for the location of the connector. A condensate trap must be installed due
to the drain connection being on the "negative pressure" side of the fan. Install a P-Trap at the unit
using the guidelines in Figure 14, p. 26.

Pitch the drain line at least 1/2 inch for every 10 feet of horizontal run to assure proper condensate
flow.

Ensure that all condensate drain line installations comply with applicable building and waste
disposal codes.

Figure 14. Condensate Trap Installation

O/A Sensor & Tubing Installation

An Outside Air Pressure Sensor is shipped with all units designed to operate on variable air volume
applications and units with Statitrac™.

A duct pressure transducer and the outside air sensor is used to control the discharge duct static
pressure to within a customer-specified controlband. Refer to the illustration in Figure 15, p. 27 and
the following steps to install the sensor and the pneumatic tubing.

1. Remove the O/A pressure sensor kit located inside the fan section. The kit contains the following
items;

• an O/A static pressure sensor

• a sensor mounting bracket

• 50’ of 3/16" O.D. pneumatic tubing

• mounting hardware

2. Using two #10-32 x 1-3/4" screws provided, install the sensor's mounting bracket to the factory
provided bracket (near the fan section).

3. Using the #10-32 x 1/2" screws provided, install the O/A static pressure sensor vertically to the
sensor bracket .

4. Remove the dust cap from the tubing connector located below the sensor in the vertical
support.

26 RT-SVX34C-EN

5. Attach one end of the 50' x 3/16" O.D. factory provided pneumatic tubing to the sensor's top port,
and the other end of the tubing to the connector in the vertical support. Discard any excess
tubing.

Units with Statitrac™

1. Open the filter access door, and locate the Statitrac Transducer Assembly illustrated in

Figure 16, p. 28. There are two tube connectors mounted on the left of the solenoid and

transducers. Connect one end of the field provided 1/4" (length 50-100 ft.) or 3/8" (length greater
than 100 ft.) O.D. pneumatic tubing for the space pressurization control to the fitting indicated
in the illustration.

2. 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 15. Pressure Tubing

Installation General Requirements

RT-SVX34C-EN 27

Installation General Requirements

T

Figure 16. Statitrac Transducer Assembly

Static Reference

ubing Connects

Here (O/A Sensor)

Space Pressure
Sensing Tube
Connects Here

Space Pressure
Transducer

Space Pressure
Calibration
Solenoid

Space Pressure
Transducer

Sensing Tube

LO

HI

to Space
Pressure

CNO

NC

Sensing Tube
to Outside Air
Reference

28 RT-SVX34C-EN

Installation Electrical

Disconnect Switch External Handle (Factory Mounted Option)

Units ordered with the factory mounted disconnect switch come equipped with an externally
mounted handle. This allows the operator to disconnect power from the unit without having to
open the control panel door. The handle location and its three positions are shown below;

ON - Indicates that the disconnect switch is closed, allowing the main power supply to be applied
at the unit.

OFF - Indicates that the disconnect switch is open, interrupting the main power supply at the unit.

OPEN COVER/RESET - Turning the handle to this position releases the handle from the disconnect
switch, allowing the control panel door to be opened.

WARNIN G

Hazardous Voltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.

Once the door has been opened, it can be closed with the handle in any one of the three positions
outlined above, provided it matches the disconnect switch position. The handle can be locked in
the "OFF" position. While holding the handle in the "OFF" position, push the spring loaded thumb
key, attached to the handle, into the base slot. Place the lock shackle between the handle and the
thumb key. This will prevent it from springing out of position.

Figure 17. Disconnect Switch

An overall layout of the field required power wiring is illustrated in Figure 18. To insure that the unit
supply power wiring is properly sized and installed, follow the guidelines outlined below.

Note: All field installed wiring must conform to NEC guidelines as well as State and Local codes.

Verify that the power supply available is compatible with the unit's name plate ratings for all
components. The available power supply must be within 10% of the rated voltage stamped on the
nameplate. Use only copper conductors to connect the 3-phase power supply to the unit.

NOTICE:

Use Copper Conductors Only!

Unit terminals are not designed to accept other types of conductors. Failure to use copper
conductors may result in equipment damage.

RT-SVX34C-EN 29

Installation Electrical

Main Power Wiring

WARNIN G

Proper Field Wiring and Grounding Required!

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 electrical codes. Failure to follow codes could result in death or serious injury.

1. Table 7, p. 32 and Table 9, p. 34 list the electrical data. The electrical service must be protected
from over current and short circuit conditions in accordance with NEC requirements. Protection
devices must be sized according to the electrical data on the nameplate. Refer to “Electrical

Wire Sizing and Protection Device Equations” on page 35 for determining:

a. The appropriate electrical service wire size based on "Minimum Circuit Ampacity" (MCA),

b. The "Maximum Over current Protection" (MOP) device.

c. The "Recommended Dual Element fuse size" (RDE).

2. If the unit is not equipped with an optional factory installed Nonfused disconnect switch, a field
supplied disconnect switch must be installed at or near the unit in accordance with the National
Electrical Code (NEC latest edition). Refer to DSS calculations “Electrical Wire Sizing and

Protection Device Equations” on page 35 for determining correct size.

Location for the electrical service entrance is shown in the unit dimensional drawings
beginning with Figure 1, p. 17. Complete the unit's power wiring connections onto either the
main terminal block HTB1, or the factory mounted nonfused disconnect switch inside the unit
control panel.

Note: When the factory installed through-the-base option is not used, the installing contractor is

required to seal any holes made in the base of the unit to prevent water from leaking into
the building.

3. Provide proper grounding for the unit in accordance with local and national codes.

Thru-the-Base Electrical (Optional Accessory)

Liquid-tite conduit couplings are secured to the base of the unit for both power and control wiring.
Liquid-tite conduit must be field installed between the couplings and the unit control box to prevent
water leaks into the building.

Note: If the unit is set on the roof curb and temporary auxiliary heat is provided in the building,

it is recommended that the electrical and control wiring conduit opening in the control box
be temporarily sealed to provide a vapor barrier.

30 RT-SVX34C-EN