Trane Voyager, YC*330B, 360B, 420B, 480B Installation and Maintenance Manual

...

Installation, Operation, and Maintenance

Voyager™ Commercial

27.5 to 50 Ton 60 Hz

22.9 to 41.7 Ton 50 Hz CV, VAV, or SZ VA V 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 airconditioning 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 pr ecautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

June 2014

RT-SVX34H-EN

Proprietary and Confidential

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 situatio n 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. R ead these carefully:

WARNING

CAUTIONs

NOTICE:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.

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

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. AL W A Y S ref er to appropr iate 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 ar c or flash, tec hnicians MUST put on all Personal Protective Equipment (PPE) in accordance with NFPA 70E or other country-specific requirements fo r arc flash protection, PRIOR to servicing the unit.

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

WARNING

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. T rane advocates the responsible handling of all refrigerantsincluding 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.

WARNING

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, y ou MUST follow requirements f or field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.

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), V AV (Variable Air V o lu me), and SZ VAV (Single Zone Variable Air Volu me) applications. Refer to the table of contents for a listing of specific topics. Refer to “Diagnostics,” p. 117 for troubleshooting information.

By carefully reviewing the information within this manual and following the instructions, the risk of improper operation and/or component dama ge 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.

Revision History

RT-SVX34G-EN (3 June 2014)

• Added features: Low Leak Damper option, eStage, Ultra Low Leak Power Exhaust, Touchscreen Human Interface.

• Updated Model Number Description, Startup, Sequence of Operation, Diagnostics, Unit Wiring Diagrams.

Warnings, Cautions and Notices

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

RT-SVX34H-EN 3

Model Number Description . . . . . . . . . . . . . . . 8

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

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

General Information . . . . . . . . . . . . . . . . . . . . 12

Commonly Used Acronyms and Abbrevia-

tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

Precautionary Measures . . . . . . . . . . . . . 13

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

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

Unit Dimensions and Weights . . . . . . . . . . . 14

Recommended Clearances . . . . . . . . . . . . . 14

Roof Curb and Ductwork . . . . . . . . . . . . . . . 14

Horizontal Ductwork . . . . . . . . . . . . . . . . . 14

Unit Rigging and Placement . . . . . . . . . . . 20

Installation General Requirements . . . . . . . 23

Condensate Drain Connection . . . . . . . . . . 23

Condensate Overflow Switch . . . . . . . . . . . 23

O/A Sensor & Tubing Installation . . . . . . . 23

Units with Statitrac™ . . . . . . . . . . . . . . . . . 23

Installation Electrical . . . . . . . . . . . . . . . . . . . . 25

Disconnect Switch External Handle (Factory Mounted Option)

. . . . . . . . . . . . . . . . . . . . . 25

Main Power Wiring . . . . . . . . . . . . . . . . . . . 25

Through-the-Base Electrical (Optional Acces-

sory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Electrical Wire Sizing and Protection Device Equations

Low Voltage Wiring . . . . . . . . . . . . . . . . . 30

Control Power Transformer . . . . . . . . . . . 30

Field Installed AC Control Wiring . . . . . . 30

Field Installed DC Control Wiring . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Remote Panels and Sensors . . . . . . . . . . . 34

Constant Volume and Single Zone VAV Con-

trol Options . . . . . . . . . . . . . . . . . . . . . . . . 34

Variable Air Volume (non-SZ VAV) Control

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Installation Piping . . . . . . . . . . . . . . . . . . . . . . 38

General Requirements . . . . . . . . . . . . . . . . 38

Connecting the Gas Supply Line to the Fur-

nace Gas Train . . . . . . . . . . . . . . . . . . . . . .38

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Unit Control Modules . . . . . . . . . . . . . . . . . .40

RTRM - ReliaTel™ Refrigeration Module .40 ECA/RTEM - Economizer Actuator/ReliaTel

Economizer Module (Optional) . . . . . . . . .40

EBA - Exhaust Blade Actuator (Optional) .40 RTAM - ReliaTel Air Handler Module (Stan-

dard with Traditional VAV) . . . . . . . . . . . .40

ReliaTel Ventilation Module (RTVM) . . . .41

ReliaTel Dehumidification Module

(RTDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Conventional Thermostat Connections

(Available Only with CV) . . . . . . . . . . . . . .42

TCI - Trane Communication Interface (Option-

al) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

LCI - LonTalk® Communication Interface (Op-

tional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

BCI - BACnet® Communication Interface (Op-

tional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Trane Wireless Comm Interface (WCI) . . . 4 2 TD5 Display - 5" Touchscreen Display . . .42

System Operation . . . . . . . . . . . . . . . . . . . . .43

Economizer Operation with a Conventional

Thermostat (CV Only) . . . . . . . . . . . . . . . .43

Microelectronic Control Features . . . . . . .43

Economizer Operation with CV Controls .44

Modulating Power Exhaust . . . . . . . . . . . .44

Mechanical Cooling without an Economizer

(CV and SZ VAV) . . . . . . . . . . . . . . . . . . . .44

Zone Temperature - Occupied Cooling (CV

and SZ VAV) . . . . . . . . . . . . . . . . . . . . . . . .45

Zone Temperature - Occupied Heating (CV

and SZ VAV) . . . . . . . . . . . . . . . . . . . . . . . .45

Supply Fan (CV and SZ VAV) . . . . . . . . . .45

Supply Air Tempering (CV and SZ VAV) .45

Variable Air Volume Applications (Single Zone VAV)

Supply Fan Output Control . . . . . . . . . . . .46

Minimum Supply Fan Output . . . . . . . . . .46

Supply Fan Mode Operation . . . . . . . . . . .47

. . . . . . . . . . . . . . . . . . . . . . . . . . . .46

4 RT-SVX34H-EN

Table of Contents

Setpoint Arbitration . . . . . . . . . . . . . . . . . 47

Ventilation Control . . . . . . . . . . . . . . . . . . 50

Space Pressure Control . . . . . . . . . . . . . . 52

Traq Overrides and Special

Considerations . . . . . . . . . . . . . . . . . . . . . 53

Supply Air Temperature Control - Heating

and Cooling . . . . . . . . . . . . . . . . . . . . . . . . 53

Variable Air Volume Applications (Traditional VAV)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Supply Air Temperature Control - Occupied

Cooling and Heating . . . . . . . . . . . . . . . . 53

Supply Air Temperature Control with an

Economizer . . . . . . . . . . . . . . . . . . . . . . . . 54

VHR Relay Output . . . . . . . . . . . . . . . . . . . 54

Zone Temperature Control without a Night Setback Panel or ICS - Unoccupied

Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Zone Temperature Control without a Night Setback Panel or ICS - Unoccupied

Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Morning Warm-up (MWU) Control . . . . . 54

Daytime Warm-up (DWU) Control . . . . . 54

Supply Duct Static Pressure Control . . . 54

Supply Air Temperature Reset . . . . . . . . 55

VAV Supply Air Tempering (Only Available

with Modulating Gas Heat) . . . . . . . . . . . 55

Constant Volume or Variable Air Volume Applications (Single Zone or Traditional)

Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Zone Temperature - Unoccupied Cooling (CV

or SZ VAV Only) . . . . . . . . . . . . . . . . . . . . 55

Zone Temperature - Unoccupied Heating 55 Mechanical Cooling with an Economizer 56

Gas Heat Control . . . . . . . . . . . . . . . . . . . 56

Electric Heat Control . . . . . . . . . . . . . . . . 56

Clogged Filter Option . . . . . . . . . . . . . . . . 56

Ventilation Override . . . . . . . . . . . . . . . . . 57

Emergency Stop . . . . . . . . . . . . . . . . . . . . 57

Phase Monitor . . . . . . . . . . . . . . . . . . . . . 57

Low Pressure Control . . . . . . . . . . . . . . . . 57

Dehumidification Low Pressure Control . 57 High Pressure Cutout and Temperature Dis-

charge Limit . . . . . . . . . . . . . . . . . . . . . . . 57

Power Exhaust Control (Standard) . . . . . 58

. . . 55

Space Pressure Control - Statitrac . . . . . .58

Power Exhaust Control (Tracking) . . . . . .58

Lead/Lag Control . . . . . . . . . . . . . . . . . . . .58

Coil Frost Protection . . . . . . . . . . . . . . . . .59

Dehumidification Frost Protection . . . . . .59

Drain Pan Condensate Overflow Switch (Op-

tional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

VFD Programming Parameters . . . . . . . . .59

Condenser Fan Sequencing Control . . . . .59

Preparing the Unit for Operation . . . . . . . .62

Electrical Phasing . . . . . . . . . . . . . . . . . . . .62

Voltage Supply and Voltage Imbalance . .63

Starting the Unit . . . . . . . . . . . . . . . . . . . . . . .63

Test Modes . . . . . . . . . . . . . . . . . . . . . . . . .63

Verifying Proper Fan Rotation . . . . . . . . . .68

Verifying Proper Air Flow (CFM) -

CV or VFD's . . . . . . . . . . . . . . . . . . . . . . . . .68

Exhaust Fan Operation . . . . . . . . . . . . . . .75

Economizer Damper Adjustment . . . . . . . .77

Economizer (O/A) Dampers . . . . . . . . . . . .77

For Models with Ultra-Low

Leak Economizers . . . . . . . . . . . . . . . . . . .79

Manual Outside Air Damper . . . . . . . . . . .81

Starting the Compressor . . . . . . . . . . . . . . .82

Starting 27.5 to 35 Ton Standard Efficiency

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Starting 40 to 50 Ton Standard Efficiency

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Starting 27.5-50 Ton High Efficiency Units 82

Line Weights . . . . . . . . . . . . . . . . . . . . . . . .82

Compressor Oil . . . . . . . . . . . . . . . . . . . . .84

Scroll Compressor Operational Noises . .97

Compressor Crankcase Heaters . . . . . . . .97

Charging by Subcooling . . . . . . . . . . . . . .97

Measuring Subcooling . . . . . . . . . . . . . . .97

Gas Heat Units . . . . . . . . . . . . . . . . . . . . . . . .97

Electric Heat Units . . . . . . . . . . . . . . . . . . . . .98

Final Unit Checkout . . . . . . . . . . . . . . . . . . . .98

For Constant Volume Units . . . . . . . . . . . .98

For Variable Air Volume Units . . . . . . . . .98

For Single Zone Variable Air Volume

RT-SVX34H-EN 5

Table of Contents

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . 100

General Unit Requirements . . . . . . . . . . . 100

Downflow/Upflow Models: . . . . . . . . . . 100

All Units: . . . . . . . . . . . . . . . . . . . . . . . . . 100

Electrical Requirements . . . . . . . . . . . . . . 100

Field Installed Control Wiring . . . . . . . . 100

Gas Heat Requirements . . . . . . . . . . . . . . 100

Sequence of Operation . . . . . . . . . . . . . . . . . 101

Mechanical Cooling Sequence Of Operation

Units Without an Economizer . . . . . . . . 101

Economizer Operation Based on

Dry Bulb . . . . . . . . . . . . . . . . . . . . . . . . . 101

Economizer Operation Based on Reference

Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . 102

Economizer Operation Based on Compara-

tive Enthalpy . . . . . . . . . . . . . . . . . . . . . . 102

Economizers with Traq . . . . . . . . . . . . . 102

. . . . . . . . . . . . . . . . . . . . . . . . 101

Dehumidification (Modulating Hot Gas Reheat) Sequence of Operation

Sensible cooling or heating control overrides

dehumidification control. . . . . . . . . . . . 103

. . . . . . . . . . 103

Gas Heat Sequence Of Operation . . . . . . 103

Constant Volume (CV) Unit Fan

Operation . . . . . . . . . . . . . . . . . . . . . . . . 104

Variable Air Volume (VAV) Unit Fan Operation (2 Stage and Modulating Gas Heat) 104

Variable Air Volume (VAV) Unit Fan Opera-

tion (Modulating Gas Heat Only) . . . . . 104

Ignition Control Module . . . . . . . . . . . . . 104

High Temperature Limit Operation and Loca-

tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Electric Heat Sequence Of Operation . . . 104

Constant Volume (CV) . . . . . . . . . . . . . . 104

Variable Air Volume (VAV) . . . . . . . . . . 105

Variable Air Volume Applications (Single Zone VAV) Sequence of Operation

Occupied Cooling Operation . . . . . . . . . 105

Occupied Heating Operation . . . . . . . . . 106

Unoccupied Cooling and

Heating Operation . . . . . . . . . . . . . . . . . 106

Dehumidification Operation . . . . . . . . . 106

. . . . . 105

Failure and Overriding Conditions . . . . .107

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

. . . . . . . . . . . . . .108

High Pressure Control and Temperature Discharge Limit (ReliaTel Control)

. . . . . . . . .108

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Fan Belt Adjustment . . . . . . . . . . . . . . . . . .109

Monthly Maintenance . . . . . . . . . . . . . . . . .111

Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Condensate Overflow Switch . . . . . . . . .111

Cooling Season . . . . . . . . . . . . . . . . . . . .111

Heating Season . . . . . . . . . . . . . . . . . . . .112

Coil Cleaning . . . . . . . . . . . . . . . . . . . . . .113

Fall Restraint . . . . . . . . . . . . . . . . . . . . . . . . .113

Refrigeration System . . . . . . . . . . . . . . . . .114

Refrigerant Evacuation and Charging . .114

Charge Storage . . . . . . . . . . . . . . . . . . . .114

Compressor Oil . . . . . . . . . . . . . . . . . . . .114

Compressor Replacements . . . . . . . . . . . .115

Electrical Phasing . . . . . . . . . . . . . . . . . . .115

Precision Suction Restrictor . . . . . . . . . .115

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

System Status/Diagnostics . . . . . . . . . . . .117

Terminal locations . . . . . . . . . . . . . . . . . .117

System Status / Diagnostics checkout proce-

dure (DC volt meter required) . . . . . . . . .117

Diagnostics (CV and SZ VAV Units Only) 118

Diagnostics (VAV only) . . . . . . . . . . . . . .118

Resetting Cooling and Ignition Lockouts 119 Zone Temperature Sensor (ZSM) Service In-

dicator . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

RTRM Zone Sensor Module (ZSM) Tests 120 Programmable & Digital Zone Sensor

Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

ReliaTel Refrigeration Module (RTRM) .121 Economizer Actuator (ECA/RTEM)

Test Procedures . . . . . . . . . . . . . . . . . . . .121

ReliaTel Air Module (RTAM) Tests . . . . .122

ReliaTel Air Module (RTOM) Tests . . . . .123

Compressor—Blink Codes . . . . . . . . . . . .124

Troubleshooting . . . . . . . . . . . . . . . . . . . . . .124

6 RT-SVX34H-EN

TR-200 VFD Programming Parameters . 130

Unit Wiring Diagram Numbers . . . . . . . . . . 132

Warranty and Liability Clause . . . . . . . . . . . 138

COMMERCIAL EQUIPMENT - 20 TONS AND LARGER AND RELATED ACCESSORIES

138

Table of Contents

RT-SVX34H-EN 7

Model Number Description

YCD 330 B E L A 0 A1 123 456 7 8 9 10 11 1213

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 Supply and Return H = Horizontal Supply and Return F = Horizontal Supply and Upflow

Return

R = Downflow Supply and Horizontal

Return

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 Supply

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

Digit 9 — Heating Capacity

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

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

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

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™

7 = 100% Fresh Air Tracking Power

Exhaust Fan w/ Ultra Low Leak Exhaust Damper (Available w/ Economizer only)

8 = 50% Fresh Air Tracking Power

Exhaust Fan w/ Ultra Low Leak Exhaust Damper (Available w/ Economizer only)

9 = 100% Power Exhaust w/ Ultra L ow

Leak Exhaust Damper w/ Statitrac™

Digit 12 — Filter

A = 2” MERV 4, Std Eff, Throwaway B = 2” MERV 8, High Eff, Throwaway C = 4” MERV 8, High Eff, Throwaway D = 4” MERV 14, High Eff, Throwaway

Filters Filters Filters Filters

Digit 13 — Supply F an Motor, HP

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

Digit 14 — Supply Air Fan Drive Selections3

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

Control

D = 0-100% Economizer,

Reference Enthalpy Control

E = 0-100% Economizer,

Differential Enthalpy Control

F = “C” Option and Low Leak

Fresh Air Damper

G = “D” Option and Low Leak

Fresh Air Damper

H = “E” Option and Low Leak

Fresh Air Damper

J = “C” Option and Ultra Low Leak

Outside Air Damper

K = “D” Option and Ultra Low Leak

Outside Air Damper

L = E Option and Ultra Low Leak

Outside Air Damper 1 = Option “C” with Traq 2 = Option “D” with Traq 3 = Option “E” with Traq 4 = Option “F” with Traq 5 = Option “G” with Traq 6 = Option “H” with Traq 7 = Option “C” with Traq w/ Ultra

Low Leak Outside Air Damper 8 = Option “D” with Traq w/ Ultra

Low Leak Outside Air Damper 9 = Option “E” with Traq w/ Ultra Low

Leak Outside Air Damper

Digit 16 — System Control

1 = Constant Volume w/Zone

Temperature Control 2 = Constant Volume w/ Discharge Air

Control 4 = VAV Supply Air Temperature

Control w/Variable Frequency

Drive w/o Bypass 5 = VAV Supply Air Temperature

Control w/Variable Frequency

Drive and Bypass 6 = Single Zone VAV w/VFD w/o

Bypass 7 = Single Zone VAV w/VFD w/

Bypass

8 RT-SVX34H-EN

Model Number Description

A = VAV Supply Air Temperature

Control w/VFD w/o Bypass w/ Motor Shaft Grounding Ring

B = VAV Supply Air Temperature

Control w/VFD w/Bypass w/Motor Shaft Grounding Ring

C = Single Zone VAV w/VFD w/o

Bypass w/ Motor Shaft Grounding Ring

D = Single Zone VAV w/VFD w/

Bypass w/Motor Shaft Grounding Ring

Note: Zone sensors are not included

with option and must be ordered as a separate accessory.

Miscellaneous Options

Digit 17

A = Service Valves

Note: Service valves cannot be selected

with High Efficiency units (Digit 29 = K or L). Liquid and discharge service valves are included with High Efficiency units.

Digit 18

B = Through the Base Electrical

Provision

Digit 19

C = Non-Fused Disconnect Switch

w/External Handle

Digit 20

D = Factory-Powered 15A GFI

Convenience Outlet and Non-Fused Disconnect Switch w/External Handle

Digit 21

E = Field-Powered 15A GFI

Convenience Outlet

Note: If convenience outlet needed w/

High Fault SCCR, option must be ordered under digit 27.

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

0 = 5kA SCCR D = High Fault SCCR w/ Disconnect E = High Fault SCCR w/ Disconnect w/

Powered Convenience Outlet

Digit 28

0 = Pre-Painted Steel Drain Pan M = Stainless Steel Drain Pan 1 = Pre-Painted Steel Drain Pan w/

2 = Stainless Steel Drain Pan w/

Condensate Overflow Switch Condensate Overflow Switch

Digit 29 — Condenser Coil Options

0 = Standard Efficiency J = Corrosion Protected Condenser K = High efficiency unit (eStage)

L = High efficiency unit (eStage) w/

Condenser Coil Coil

Corrosion Protected Condenser Coil

Digit 30-31 — Miscellaneous Options

P = Discharge Temperature R = Clogged Filter Switch

Sensor

Digit 32 — Dehumidification Option

T = Modulating Hot Gas Reheat

Digit 33 — Human Interface

5 = Touchscreen Human Interface, 5"

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:

Electric

Heater

Rated

Tons

Voltage

27½

to 35

and

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. V OM is available for the exhaust fan without fresh air tracking power exhaust.

7. High fault is 65kA on 208/230/460V

and 25kA on 575V.

27/3641/

208 x x 240 x x 480 xxxx 600 x x x 208 x 240 x 480 x x x x 600 x x x x

54 72 90 108

RT-SVX34H-EN 9

Model Number Description

YCD 275 B C L A 0 A1 123 456 7 8 9 10 11 1213

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 Supply and Return H = Horizontal Supply and Return F = Horizontal Supply and Upflow

Return

R = Downflow Supply and Horizontal

Return

Digits 4, 5, 6 – Nominal Cooling 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 Supply

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

Digit 9 – Heating Capacity

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™

7 = 100% Fresh Air Tracking Power

8 = 50% Fresh Air Tracking Power

9 = 100% Power Exhaust w/ Ult ra Low

Exhaust Fan w/ Ultra Low Leak Exhaust Damper (Available w/ Economizer only)

Leak Exhaust Damper w/ Statitrac™

Digit 12 – Filter

A = 2” (51 MM) MERV 4, Std Eff, B = 2” (51 MM) MERV 8, High Eff, C = 4” (102 MM) MERV 8, High Eff, D = 4” (102 MM) MERV 14, High Eff,

Throwaway Filters Throwaway Filters Throwaway Filters Throwaway Filters

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

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

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 J = “C” Option and Ultra Low Leak K = “D” Option and Ultra Low Leak L = “E” Option and Ultra Low Leak 1 = Option “C” with Traq

2 = Option “D” with Traq 3 = Option “E” with Traq 4 = Option “F” with Traq

Control Reference Enthalpy Control Differential Enthalpy Control Fresh Air Damper Fresh Air Damper Fresh Air Damper Outside Air Damper Outside Air Damper Outside Air Damper

5 = Option “G” with Traq 6 = Option “H” with Traq 7 = Option “C” with Traq w/ Ultra

8 = Option “D” with Traq w/ Ultra 9 = Option “E” with Traq w/ Ultra L ow

Low Leak Outside Air Damper

Leak Outside Air Damper

Digit 16 – System Control

1 = Constant Volume w/ Zone 2 = Constant V olume w/ Di scharge Air 4 = VAV Supply Air Temperature

5 = VAV Supply Air Temperature

6 = Single Zone VAV w/VFD w/o 7 = Single Zone VAV w/VFD w/ A = VAV Supply Air Temperature

B = VAV Supply Air Temperature

C = Single Zone VAV w/VFD w/o

D = Single Zone VAV w/VFD w/

Note: Zone sensors are not included

Temperature Control

Control

Control w/Variable Frequency

Drive w/o Bypass

Control w/Variable Frequency

Drive and Bypass

Bypass

Control w/VFD w/o Bypass w/

Motor Shaft Grounding Ring

Control w/VFD w/Bypass w/Motor

Shaft Grounding Ring

Bypass w/ Motor Shaft Grounding

Ring

Bypass w/Motor Shaft Grounding

Ring

with option and must be ordered

as a separate accessory.

Miscellaneous Options Digit 17

A = Service Valves

Note: Service valves cannot be selected

with High Efficiency units

(Digit 29 = K or L). Liquid and

discharge service valves are

included with High Efficiency

units.

Digit 18

B = Through the Base Electrical

Provision

Digit 19

C = Non-Fused Disconnect Switch

with External Handle

Digit 20

* = Unused Digit

Digit 21

* = Unused Digit

10 RT-SVX34H-EN

Model Number Description

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

0 = 5kA SCCR D = High Fault SCCR w/ Disconnect

Digit 28

0 = Pre-Painted Steel Drain Pan M = Stainless Steel Drain Pan 1 = Pre-Painted Steel Drain Pan w/

Condensate Overflow Switch

2 = Stainless Steel Drain Pan w/

Condensate Overflow Switch

Digit 29 — Condenser Coil Options

0 = Standard Efficiency

Condenser Coil

J = Corrosion Protected Condenser

Coil K = High efficiency unit (eStage) L = High efficiency unit (eStage) w/

Corrosion Protected Condenser

Coil

Digit 30-31 — Miscellaneous Options

P = Discharge Temperature Sensor R = Clogged Filter Switch

Digit 32 — Dehumidification Option

T = Modulating Hot Gas Reheat

Digit 33 — Human Interface

5 = Touchscreen Human Interface, 5"

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.

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 through 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-

RT-SVX34H-EN 11

General Information

Commonly Used Acronyms and Abbreviations

BAS = Building Automation System PSIG = Pounds Per Square Inch Gauge pressure CFM = Cubic Feet per Minute PHM = Phase monitor CLV = Cooling Valve (Reheat only) R/A = Return Air COMM = Module Designation for TCI/LCI RAH = Return Air Humidity CV = Constant Volume RAT = Return Air Temperature sensor CW = Clockwise RH = Right Hand CCW = Counterclockwise RHP = Reheat Pumpout Solenoid DSP = Direct Space Pressure control RHV = Reheat Valve DTS = Discharge Air Sensor RLP = Reheat Low Pressure Cutout DWU = Daytime Warm-up RPM = Revolutions Per Minute E/A = Exhaust Air RTAM = ReliaTel Air Handler Module ECA = Economizer Actuator RTDM = ReliaTel Dehumidification Module EET = Entering Evaporator Temperature Sensor RTVM = ReliaTel Ventilation Module F/A = Fresh Air RTOM = ReliaTel Options Module FDD = Fault Detection & Diagnostics RTRM = ReliaTel Refrigeration Module FFS = Fan Failure Switch S/A = Supply Air HI = Human Interface SCCR = Short Circuit Current Rating ICS = Integrated Comfort System (See BAS) SPC = Space Pressure Calibration Solenoid IDM = Indoor Fan Motor SPP = Space Pressure Transducer I/O = Input/Output SPT = Static Pressure Transducer

IOM =

LCI = LonTalk® Communication Interface TCI = Trane Communication Interface LCI-R = LonTalk Communication Interface with ReliaTel TCO = Temperature Cutout LH = Left Hand TD5 = 5" Touchscreen Display MAS = Mixed Air Sensor TDL = Temperature Discharge Limit MAT = Mixed Air Temperature VAV = Variable Air Volume MCHE = Microchannel VFD = Variable Frequency Drive MWU = Morning Warm Up VHR = Ventilation Heat Relay (VAV box relay) NSB = Night Setback (programmable ZSM BAYSENS119*) W.C. = Water Column O/A = Outside Air WCI = Wireless Comm Interface OAH = Outside Air Humidity XFSP = Exhaust Fan Setpoint OAT = Outside Air Temperature ZSM = Sensor, Zone Sensor, Zone Sensor Module, Zone Panel PGA = Power Exhaust Actuator

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

SZVAV = Single Zone Variable Air Volume

About the Unit

Overall unit dimensional data is illustrated in Figure 1,

p. 14 to Figure 9, p. 18. 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

Basic unit components include:

• Scroll compressors

• One (1) Intertwined Evaporator Coil

• One (1) Supply Fan

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

• Microchannel Condenser Coils

• Filters (type is dependent on opti on selection)

with the unit. Acronyms are used extensively throughout this manual when referring to the “Control System”.

12 RT-SVX34H-EN

Precautionary Measur es

WARNING

Fiberglass Wool!

Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance or rep air 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, mask, long sleev es and pants when w orking with products containing fiberglass wool. Exposition 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.

- 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, blowi ng , 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 af fected areas gently with soap and warm water after handling.

An optional roof curb, specifically designed for the V oyager commercial rooftop units is available from T rane. 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:

• V erify that the nameplate data corresponds to the sales order and bill of lading (including electrical data).

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

• Check for material shor tages. Figure 11, p. 19 illustrates where “ship with” items are placed inside the unit.

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

General Information

WARNING

No Step Surface!

Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the supporting metal to collapse, resulting in the operator/technician to fall. Failure to follow this recommendation 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.

Storage

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

“Startup,” p. 40.

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

RT-SVX34H-EN 13

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. 20 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 b efore 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 on ly 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.

the unit into the ductwork. Refer to figures beginning on page 14 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.

Figure 1. 60 Hz 27½-35, 50 Hz 23-29 Tons (TCD, TED,

YCD low heat)

If a Trane curb accessory kit is not used:

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, gask ets

must be installed around the curb perimeter flange, Supply Air opening, and Return Air openings.

c. Insulation must be installed on the bottom of the

condenser section of the unit.

Horizontal Ductwork

When attaching the ductwork to a horizontal supply or horizontal return unit, provide a water tight flexible connector at the unit to prevent noise transmission from

14 RT-SVX34H-EN

Unit Dimensions and Weights

1 1/4 (32)

3 1/4 (81)

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

31.39"

797.3mm

6.91"

175.6mm

1 1/4" [31.7mm] FEMALE

PVC PIPE

3/4" [19.0mm] NPT GAS INLET

SEE NOTE 2

CUSTOMER CONNECTION POINT

Figure 2. Rear view showing duct openings for horizontal supply and return, 60 Hz 27½-35, 50 Hz 23-29 Tons (TCH,

TEH, YCH low heat)

Notes:

• For combination of horizontal and downflow openings

• On horizontal units, the VFD is located between the

supply and return ductwork, which makes access limited.

Figure 3. 60 Hz 27½-35 , 50 Hz 23-29 T o ns (TC, TE, YC low heat)

(digit 3 = F or R) see Figure 1, p. 14 for appropriate downflow/upflow dimensions and Figure 2, p. 15 for appropriate horizontal dimensions.

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

RT-SVX34H-EN 15

Unit Dimensions and Weights

1 1/4 (32)

3 1/4 (81)

Figure 4. 60 Hz 27½-35, 50 Hz 23-29 Tons (YD high heat)

191

Figure 5. Duct openings, 60 Hz 27½-35, 50 Hz 23-29 Tons (YH high heat)

Notes:

• On horizontal units, the VFD is located between the

supply and return ductwork, which makes access limited.

• For combination of horizont al and downflow openings (digit 3 = F or R) see Figure 4, p. 16 for appropriate downflow/upflow dimensions and Figure 5, p. 16 for appropriate horizontal dimensions.

16 RT-SVX34H-EN

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

5270.5mm

207 1/2"

42"

5 3/8"

83 13/16"

2128.8mm

7 9/16"

208 1/16"

5284.7mm

90 5/8"

2301.8mm

90 1/16"

70 7/16"

31.39"

6.89"

PVC PIPE FEMALE

1" [25.4MM] NPT GAS INLET

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

1066.8mm

2287.5mm

136.5m

192.1m

3.25 [82.55mm] TO TOP OF FAN GRILLE

1789.1mm

797.3mm

175mm

1 1/4" [31.7mm]

Unit Dimensions and Weights

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

Figure 7. 60 Hz 40-50, 50 Hz 33-42 Tons (TD, TD, YD low and high heat)

RT-SVX34H-EN 17

Unit Dimensions and Weights

1 1/4 (32)

3 1/4 (81)

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

32.84"

834.2mm

4.66"

118.4mm

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 8. Duct openings, 60 Hz 40-50, 50 Hz 33-42 Tons (TH, TH, YH low and high heat)

Notes:

• On horizontal units, the VFD is located between the

supply and return ductwork, which makes access limited.

• For combination of horizontal and downflow openings (digit 3 = F or R) see Figure 7, p. 17 for appropriate downflow/upflow dimensions and Figure 8, p. 18 for appropriate horizontal dimensions.

Figure 9. 60 Hz 40-50, 50 Hz 33-42 Tons (TC, TE, Y C low and high heat)

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

18 RT-SVX34H-EN

Figure 10. Fresh air and power exhaust dimensions for TC*, TE*, and YC* units

Figure 11. Location of “Ship With” items for TC*, TE*, and YC* units

Unit Dimensions and Weights

RT-SVX34H-EN 19

Unit Dimensions and Weights

Unit Rigging and Placement

WARNING

Heavy Objects!

Ensure that all the lifting equipment used is properly rated for the weight of the unit being lifted. Each of the cables (chains or slings), hooks, and shackles used to lift the unit must be capable of supporting the entire weight of the unit. Lifting cables (chains or slings) may not be of the same length. Adjust as necessary for even unit lift. Other lifting arrangements could cause equipment or property damage. Failure to follow instructions above or properly lift unit could result in unit dropping and possibly crushing operator/ technician which could result in death or serious injury.

Use spreader bars as shown in the diagram. Refer to the Installation manual or nameplate for un it 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. 20.

Table 1. Minimum operating clearances installation

(horizontal, downflow, and mixed airflow configurations)

Recommended Clearances

Condenser

(a)

Coil

Single Unit

TC*, TE*, YC*

27.5 to 50 Tons

Multiple Unit

TC*, TE*, YC*

27.5 to 50 Tons

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

Economizer/ Exhaust End

6 Feet 8 Feet 4 Feet

Distance Between Units

Economizer/ Exhaust End End/Side

12 Feet 16 Feet 8 Feet

Orientation

End/Side

Service Side

Access

Service Side

Access

Table 2. Maximum slope

Cabinet

“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.

End to End

(inches)

Side to Side

(inches)

Figure 12. Unit rigging

Figure 13. Center of gravity

Z (see note 2)

Table 3. Center of gravity

Center-of-Gravity (inches)

YC Low Heat

Dimension

Unit Model

***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, 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

XY ZXY ZXY Z

YC High Heat

Dimension

TC/TE

Dimension

20 RT-SVX34H-EN

Unit Dimensions and Weights

DE F

TOP VIEW OF UNIT

COMPRS

CBA

Table 4. Approximate units operating weights — lbs./kg

Basic Unit Weights

Unit Models

(60Hz/50Hz)

330/275 3720 / 1687 4150 / 1882 3590 / 1628 3610 / 1637.5 360/305 3795 / 1721 4225 / 1916 3665 / 1662 3685 / 1671.5 420/350 3876 / 1758 4306 / 1953 3746 / 1699 3766 / 1708 480/400 4825 / 2189 4950 / 2245 4565 / 2071 4600 / 2086.5 600/500 5077 / 2303 5202 / 2360 4827 / 2189.5 4852 / 2201

1. Basic unit weight includes minimum horsepo wer supply fan motor.

Table 5. Point loading average weight

Unit Models

(60Hz/50Hz) A B C D E F

330/275 852 / 386 695 / 315 754 / 342 740 / 335 602 / 273 504 / 228 360/305 878 / 398 681 / 309 750 / 340 713 / 323 577 / 262 622 / 282 420/350 841 / 381 842 / 382 669 / 303 735 / 333 582 / 264 634 / 287 480/400 835 / 378 869 / 394 950 / 431 748 / 339 769 / 349 776 / 352 600/500 882 / 400 931 / 422 954 / 433 740 / 336 844 / 382 847 / 384

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.

Low HeatYCHigh Heat TC TE

1,2

— lbs./kg

RT-SVX34H-EN 21

Unit Dimensions and Weights

Table 6. Approximate operating weights— optional components — lbs./kg

Var. Freq. Drives

0-25%

(VFD’s)

Unit Model

(60Hz/50Hz)

**(D,F)330/275 110/50 165/74 50/23 260/117 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(H,R)330/275 145/65 200/90 50/23 285/128 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(D,F)360/305 110/50 165/74 50/23 260/117 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(H,R)360/305 145/65 200/90 50/23 285/128 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(D,F)420/350 110/50 165/74 50/23 260/117 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(H,R)420/350 145/65 200/90 50/23 285/128 85/39 115/52 18/8 6/3 30/14 85/38 310/141 330/150

**(D,F)480/400 110/50 165/74 50/23 290/131 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**(H,R)480/400 145/65 200/90 50/23 300/135 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**(D,F)600/500 110/50 165/74 50/23 290/131 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

**(H,R)600/500 145/65 200/90 50/23 300/135 115/52 150/68 18/8 6/3 30/14 85/38 365/169 365/169

Baro.

Relief

Power

Exhaust

Man

Damper Econ.

Bypass Lo Hi

Valves

Serv

Thru-

the base Elec.

Fused

Discon.

Switch

Ultra

Tool-Less

Condenser

Unit Model

(60Hz/50Hz)

**(D,F)330/275 107/49 105/48 112/51 34 / 15 7 4 / 34 326/148

**(H,R)330/275 107/49 105/48 78/35 34 / 15 77 / 35 326/148

**(D,F)360/305 107/49 105/48 112/51 34 / 15 7 4 / 34 255/116

**(H,R)360/305 107/49 105/48 78 /35 34 / 15 77 / 35 255/116

**(D,F)420/350 107/49 105/48 112/51 34 / 15 7 4 / 34 173/78

**(H,R)420/350 107/49 105/48 78/35 34 / 15 77 / 35 173/78

**(D,F)480/400 112/51 130/59 114/52 34 / 15 7 4 / 34 241/109

**(H,R)480/400 112/51 130/59 100/45 34 / 15 84 / 38 241/109

**(D,F)600/500 112/51 130/59 114/52 34 / 15 74 / 34 -25/-11

**(H,R)600/500 112/51 130/59 100/45 34 / 15 84 / 38 -25/-11

Note: Basic unit weight includes minimum horsepower supply fan motor.

HGRH

Coil

Hail

Guards

Ultra

Low Leak Econ

Low Leak 50%

Exhaust

Ultra Low

Leak

100%

Exhaust

High

Efficiency

(eStage)

Non-

Factory

GFI

with

Discon.

Switch

Roof CurbW/O With

22 RT-SVX34H-EN

Installation General Requirements

Condensate Drain Connection

Each commercial rooftop unit is equipped with one (1) 11/4 inch Female PVC condensate drain connection.

Refer to Figure 11, p. 19 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. 23.

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.

Notes:

• For units with optional Condensate Overflow Switch

(COF), the switch will not work properly if unit is not level or slightly sloped toward switch.

• To ensure proper condensate flow during operation the unit and the curb must be level.

Figure 14. Condensate trap installation

O/A Sensor & Tubing Installation

An Outside Air Pressure Sensor is shipped with all units designed to operate on traditional variable air volume applications (non-SZ VAV) and units with Statitrac™.

A duct pressure transducer and the outside air sensor is used to control the discharge duct static pressure to w ithin a customer -specified controlband. Refer to the illustration in Figure 16, p. 24 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.

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 17, p. 24. There are two tube connectors mounted on the left of the solenoid and transducers. Connect one end of the

Condensate Overflow Switch

This switch protects building from condensate overflow damage. It is factory-installed and tested.

Figure 15. Condensate overflow switch location

RT-SVX34H-EN 23

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.

Installation General Requirements

CNO

Sensing Tube to Traq LO Side Pressure Port

Airow Transducer

Sensing Tube to Traq HI Side Pressure Port

Figure 16. Pressure tubing

Figure 17. Transducer assembly

Note: Statitrac and Traq transducer assembly shown.

24 RT-SVX34H-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 sw itch, allowing the control panel door to be opened.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote disconnects before servicing . Follow proper lock out/ 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 loc ked in the “OFF” position . While holding the handle in the “OFF” position, push the spring loaded thumb key, attac hed 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 18. Disconnect switch

An overall layout of the field required power wiring is illustrated in Figure 19, p. 26. 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.

Ve rify 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 ar e not designed t o accept other types of conductors. Failure to use copper conductors could result in equipment damage.

Main Power Wiring

WARNING

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, y ou MUST follo w requir ements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.

1. Table 7, p. 27 to T a bl e 12, p. 29 list the electrical service sizing 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 29 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 switc h, 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

Wire Sizing and Protection Device Equations” on page 29 for determining correct size.

“Electrical

RT-SVX34H-EN 25

Installation Electrical

Location for the electrical service entrance is shown in the unit dimensional drawings beginning with

Figure 1, p. 14. Complete the unit's power wiring

connections onto either the main terminal bloc k 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 ho les made in the base o f the unit to prevent water from leaking into the building.

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

Figure 19. Typical field power wiring

Through-the-Base Electrical (Optional Accessory)

Liquid-tight conduit couplings are secured to the base of the unit for both power and control wiring. Liquid-tight 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.

26 RT-SVX34H-EN

Installation Electrical

Table 7. 27½-50 ton electrical serv ice sizing data—60Hz

Fan Motors

Compressor - Std

Efficiency

Electrical

Characteri

Model

TC/TE/

YC*330

TC/TE/

YC*360

TC/TE/

YC*420

TC/TE/

YC*480

TC/TE/

YC*600

Notes:

1. All customer wiring and devices must be installed in accordance with local and national electrical codes.

2. 100% Power Exhaust is with or without Statitrac™.

stics

208/60/3 187-229

230/60/3 207-253

460/60/3 414-506

575/60/3 517-633

208/60/3 187-229 2/13 50.5

230/60/3 207-253 2/13 50.5

460/60/3 414-506 2/13 23.0

575/60/3 517-633 2/13 19.0

208/60/3 187-229

230/60/3 207-253

460/60/3 414-506

575/60/3 517-633

208/60/3 187-229

230/60/3 207-253

460/60/3 414-506

575/60/3 517-633

208/60/3 187-229

230/60/3 207-253

460/60/3 414-506

575/60/3 517-633

Allowable

Voltage

Range

No/ Ton

1/12,

1/13

1/12,

1/13

1/12,

1/13

1/12,

1/13

1/13,

1/15

1/13,

1/15

1/13,

1/15

1/13,

1/15

1/13,

1/20

1/13,

1/20

1/13,

1/20

1/13,

1/20

2/13,

1/15

2/13,

1/15

2/13,

1/15

2/13,

1/15

RLA

(Ea.)

44.0/

50.5

44.0/

50.5

21.0/

23.0

17.5/

19.0

50.5/

56.0

50.5/

56.0

23.0/

27.5

19.0/

23.0

50.5/

83.9

50.5/

83.9

23.0/

34.0

19.0/

27.3

50.5/

56.0

50.5/

56.0

23.0/

27.5

19.0/

23.0

(Ea.)

Compressor - High

Efficiency, eStage Supply Condenser Exhaust

LRA

No/

RLA

LRA

(Ea.) H P FLA No HP

203,

267

203,

267

203,

267

203,

267

203,

304

203,

304

98,

147

84,

122

203,

315

203,

315

98,

158

84,

136

267,

345

267,

345

142,

155

103,

126

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

7.5

10.0

15.0

7.5

10.0

15.0

7.5

10.0

15.0

7.5

10.0

15.0

10.0

15.0

10.0

15.0

10.0

15.0

10.0

15.0

10.0

15.0

20.0

10.0

15.0

20.0

10.0

15.0

20.0

10.0

15.0

20.0

28.0,

37.1

28.0,

37.1

14.1,

16.8

12.2,

14.7

28.0,

40.9

28.0,

40.9

14.1,

18.6

12.2,

15.4

28.0,

44.9

28.0,

44.9

14.1,

19.2

12.2,

16.6

31.1,

50.5

31.1,

50.5

14.1,

23.0

11.5,

19.0

40.9,

56.0

40.9,

56.0

18.6,

27.5

15.4,

23.0

98, 142

84, 103

98, 142

84, 103

22.2

29.5

18.8

25.2

9.4

12.6

7.8

10.1

22.2

29.5

18.8

25.2

9.4

12.6

7.8

10.1

22.2

29.5

40.7

18.8

25.2

35.4

9.4

12.6

17.7

7.8

10.1

15.1

29.5

40.7

25.2

35.4

12.6

17.7

10.1

15.1

29.5

40.7

56.1

25.2

35.4

49.4

12.6

17.7

24.7

10.1

15.1

19.6

304/

315

304/

315

147/

158

122/

136

315/

315

315/

315

158/

158

136/

136

315/

351

315/

351

158/

197

136/

146

315/

485

315/

485

158/

215

136/

175

315/

351

315/

351

158/

197

136/

146

Ton

1/6,

2/9

1/6,

2/9

1/6,

2/9

1/6,

2/9

1/6,

2/10

1/6,

2/10

1/6,

2/10

1/6,

2/10

1/6,

2/11

1/6,

2/11

1/6,

2/11

1/6,

2/11

1/8,

2/13

1/8,

2/13

1/8,

2/13

1/8,

2/13

1/10,

2/15

1/10,

2/15

1/10,

2/15

1/10,

2/15

(Ea.)

50%100

FLA

(Ea.)

31.17.0 1 2 1.0 4.1

31.13.5 1 2 1.0 1.8

31.12.8 1 2 1.0 1.4

31.17.0 1 2 1.0 4.1

31.13.5 1 2 1.0 1.8

31.12.8 1 2 1.0 1.4

31.17.0 1 2 1.0 4.1

31.13.5 1 2 1.0 1.8

31.12.8 1 2 1.0 1.4

41.17.0 1 2 1.5 5.4

41.13.5 1 2 1.5 2.7

41.12.8 1 2 1.5 2.2

41.17.0 1 2 1.5 5.4

41.13.5 1 2 1.5 2.7

41.12.8 1 2 1.5 2.2

FLA

(Ea.)No.

RT-SVX34H-EN 27

Installation Electrical

Table 8. Electrical service sizing data — electric heat

module (electric heat only) — 60 Hz

Models: TE(D,H,F,R) 330—600 Electric Heat FLA

KW Heater

Nominal

Unit Size

(Tons)

27½-35

40- 50

Note: All FLA in this table are based on heater operating at 208, 240, 480,

and 600 volts.

Nominal

36 54 72 90 108

Unit

Voltage

208 74.9 112.4 — — — 230 86.6 129.9 — — — 460 43.3 65.0 86.6 108.3 — 575 — 52.0 69.3 86.6 — 208 — 112.4 — — — 230 — 129.9 — — — 460 — 65.0 86.6 108.3 129.9 575 — 52.0 69.3 86.6 103.9

FLA FLA FLA FLA FLA

Table 9. Electrical service sizing data — crankcase

heaters (heating mode only) — 60Hz

Nominal

Unit Size (Tons)

27½ - 35 1111

40, 50 2211

200 230 460 575

Table 10. Electrical service sizing data — 50Hz

Compressor - Std

Efficiency

Compressor -

High Efficiency

Supply Condenser

Electrical

Model

TC/TE/YC*275 380-415/50/3

TC/TE/YC*305 380-415/50/3 2/11 23.0 158

TC/TE/YC*350 380-415/50/3

TC/TE/YC*400 380-415/50/3

TC/TE/YC*500 380-415/50/3

Notes:

1. All condenser fan motors are single phase.

2. All customer wiring and devices must be installed in accordance with local and national electrical codes.

3. Allowable voltage range for the 380V unit is 342-418V, allowable voltage range for the 415V unit is 373-456.

4. 100% Power Exhaust is with or without Statitrac

tics

Characteris

No/ Ton

1/10,

1/11

1/11,

1/12

1/11,

1/17

2/11,

1/12

RLA

(Ea.)

21.0/

23.0

23.0/

27.5

23.0/

34.0

23.0/

27.5

LRA

(Ea.)

147/

158

158/

197

158/

215

158/

197

No/ Ton

1/6,

2/9

1/6,

2/10

1/6,

2/11

1/8,

2/13

1/10,

2/15

RLA

(Ea.)

14.1,

16.8

14.1,

18.6

14.1,

19.2

14.1,

23.0

18.6,

27.5

LRA

(Ea.)

(kW) FLA No.HP(kW)

98,

7.5

(5.6)

(6.8)

7.5

(5.6)

(6.8)

7.5

(5.6)

(6.8)

(10.5)

(6.8)

(10.5)

(6.8)

(10.5)

(12.8)

13.6/

14.1

16.0/

15.5

13.6/

14.1

16.0/

15.5

13.6/

14.1

16.0/

15.5

24.0/

26.0

16.0/

15.5

24.0/

26.0

16.0/

15.5

24.0/

26.0

29.0/

28.0

142

98,

142

98,

147

98,

158

142,

155

Fan Motors

0.75

(0.56)

0.75

(0.56)

0.75

(0.56)

0.75

(0.56)

0.75

(0.56)

FLA Add Unit Voltage

FLA

50% 100%

Exhaust

(Ea.)

4.4 1 2

(kW)

0.75

(0.56)

0.75

(0.56)

0.75

(0.56)

1.0

(0.75)

1.0

(0.75)

FLA

(Ea.)No.

1.7

2.5

28 RT-SVX34H-EN

Table 11. Electrical service sizing data – electric heat

module (electric heat units only)—50Hz

Models: TE(D,H,F,R) 275 through 500 Electric Heat FLA

Nominal

Unit Size

(Tons)

23-29

33, 42

Note: All FLA in this table are based on heater operating at 380 or 415 volts

as shown above.

Nominal

Unit

Voltage

380 34.5 51.1 68.9 85.5 – 415 37.6 55.6 – – – 380 – 51.1 68.9 85.5 103.4 415 – 55.6 75.1 93.2 112.7

KW Heater (380/415V)

23/27 34/40 45/54 56/67 68/81

Table 12. Electrical service sizing data — crankcase

heaters (heating mode only) — 50Hz

FLA Add

Nominal Unit Size

(Tons)

23 - 29 1 1 33 - 42 1 1

Unit Voltage

380 415

Electrical Wire Sizing and Protection Device Equations

To correctly size the main power wiring based on MCA (Minimum Circuit Ampacity), use the appropriate equation listed below. Read the definitions that follow and then use Calculation #1 for determining MCA (Minimum Circuit Ampacity), MOP (Maximum Over current Protection), and RDE (Recommended Dual Element fuse size) for TC (Cooling Only) units and Y C (Cooling with Gas Heat) units. Use Calculation #2 for TE (Cooling with Electric Heat) units.

Load Definitions:

• LOAD 1 = CURRENT OF THE LARGEST MOTOR (Compressor or Fan Motor)

• LOAD 2 = SUM OF THE CURRENTS OF ALL REMAINING MOTORS

• LOAD 3 = FLA (Full Load Amps) OF THE ELECTRIC HEATER

• LOAD 4 = ANY OTHER LOAD RATED AT 1 AMP OR MORE

• CRANKCASE HEATERS FOR HEATING MODE ONLY:

• 208/230 VOLT

– 27.5 - 35 Ton Units, Add 1 Amp – 40 - 50 Ton Units, Add 2 Amps

• 460/575 VOLT

– 27.5 - 35 Tons Units, Add 1 Amp – 40 - 50 Ton Units, Add 1 Amp

Installation Electrical

Calculation #1 - TC*, YC*-27.5 to 50 Ton Units

MCA = (1.25 x Load 1) + Load 2 + Load 4 MOP = (2.25 x Load 1) + Load 2 + Load 4 (See Note 1) RDE = (1.5 x Load 1) + Load 2 + Load 4 (See Note 2) Calculation # 2 - TE*-27.5 to 50 Ton Units A. Single Source Power (all voltages) T o calculate the correct MCA (Minimum Circuit Ampacity),

MOP (Maximum Over current Protection), and RDE (Recommended Dual Element fuse size), two (2) sets of calculations must be performed;

1 . Calculate the M CA, MOP and/or RDE values using th e

above equation as if the unit is operating in the cooling mode.

2. Calculate the MCA, MOP and/or RDE values as if the unit is operating in the heating mode, as follows:

Note: When determining loads, the compressors and

condenser fan motors do not operate during the heating cycle.

Units with less than 50 KW Heaters

MCA = 1.25 x (Load 1 + Load 2 + Load 4) + (1.25 x Load 3)

Units with 50 KW or Larger Heaters

MCA = 1.25 x (Load 1 + Load 2 + Load 4) + Load 3 The MCA value stamped on the nameplate is the largest of

the two calculated values. MOP = (2.25 x Load 1) + Load 2 + Load 3 + Load 4 (See Note

The MOP value stamped on the nameplate is the largest of the two calculated values.

RDE = (1 .5 x Load 1) + Load 2 + Load 3 + Load 4 (See Note 2)

Note: Select an over current protection device equal to

the MOP value. If the calculated MOP value does not equal a standard size protection device listed in NEC 240-6, select the next lower over current protection device. If the calculated MOP value is less than the MCA value, select the lowest over current protection device whic h is equal to or larger than the MCA, providing the selected over current device does not exceed 800 amps.

Note: Select a Dual Element Fuse equal to the RDE value.

If the calculated RDE value does not equal a standard dual element fuse size listed in NEC 2406, select the next higher fuse size. If the calculated RDE value is greater than the MOP value, select a Dual Element fuse equal to the calculated MOP (Maximum Over current Protection) value

RT-SVX34H-EN 29

Installation Electrical

Disconnect Switch Sizing (DSS)

Calculation A. - YC*, TC*, and TE* Units:

DSS = 1.15 X (LOAD1 + LOAD2 + LOAD4) For TE* units, use calculations A and B.

Calculation B. - TE* Units:

DSS = 1 .15 X (LO AD3 + Supply Fan FLA + Exhaust

Fan FLA).

Use the larger value of calculations A or B to size the electrical disconnect switch.

Low Voltage Wiring

An overall layout of the var ious c ont rol opti ons avai lable for a Constant Volume application is illustrated in

Figure 20, p. 32 and Figure 21, p. 33 illustrates the various

control options for a V ariable Air Volume application. The required number of conductors for eac h control device are listed in the illustration.

A typical field connection diagram for the sensors and other options are shown in the following section “Remote Panels and Se nsors”. These diagrams are representative of standard applications and are provided for general reference only. Always refer to the wiring diagram that shipped with the unit for specific electrical schematic and connection information.

Note: All field wiring must conform to NEC guidelines as

well as state and local codes.

Control Power Transformer

WARNING

Hazardous Voltage!

The 24 volt control power transformers are equipped with internal circuit breakers. They are to be used only with the accessories called out in this manual. If a circuit breaker trips, be sure to turn off all power to the unit before attempting to reset it.

On units equipped with the VFD option, an additional control power transformer is used. The secondary is protected with fuses. Should the fuse blow, be sure to turn off all power to the unit before attempting to replace it.

Field Installed AC Control Wiring

WARNING

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, y ou MUST follo w requir ements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.

NOTICE:

Use Copper Conductors Only!

Unit terminals ar e not designed t o accept other types of conductors. Failure to use copper conductors could result in equipment damage.

Before installing any connecting wiring, refer to Table 13,

p. 30 for conductor sizing guidelines and;

• Use copper conductors unless otherwise specified.

• Ensure that the AC control voltage wiring between

the controls and the unit's termination point does not exceed three (3) ohms/conductor for the length of the run.

Note: Resistance in excess of 3 ohms per conduct or may

cause component failure due to insufficient AC voltage supply.

• Refer to dimensional information beginning with

Figure 1, p. 14 for the electrical access locations

provided on the unit.

• Do not run the AC low voltage wiring in the same

conduit with the high voltage power supply wiring.

Be sure to check all loads and conductors for grounds, shorts, and miswiring. After cor recting any discrepancies, reset the circuit breakers by pressing the black button located on the left side of the transformer.

Table 13. AC conductors

Distance from unit to control Recommended wire size

000-460 feet 18 gauge 461-732 feet 16 gauge 733-1000 feet 14 gauge

30 RT-SVX34H-EN

+ 108 hidden pages

Trane Voyager, YC*330B, 360B, 420B, 480B Installation and Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warnings, Cautions and Notices

Table of Contents

Model Number Description

60 Hz Description

50 Hz Description

General Information

Commonly Used Acronyms and Abbreviations

About the Unit

Precautionary Measur es

Unit Inspection

Storage

Unit Dimensions and Weights

Recommended Clearances

Roof Curb and Ductwork

Horizontal Ductwork

Unit Rigging and Placement

Installation General Requirements

Condensate Drain Connection

O/A Sensor & Tubing Installation

Units with Statitrac™

Condensate Overflow Switch

Installation Electrical

Disconnect Switch External Handle (Factory Mounted Option)

Main Power Wiring

Through-the-Base Electrical (Optional Accessory)

Electrical Wire Sizing and Protection Device Equations

Low Voltage Wiring

Control Power Transformer

Field Installed AC Control Wiring