Trane SCWG-020, SCWG-025, SCWG-030, SCWG-032, SCWG-035 Installation and Maintenance Manual

Installation, Operation,

and Maintenance

Intellipak™

Commercial Self-Contained

Modular Series 20 to 35Tons

Models	SCWG -020, -025, -030, -032, -035
	SIWG -020, -025, -030, -032, -035
	SCRG -020, -025, -032
	SIRG -020, -025, -032

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.

June 2014

SCXG-SVX01H-EN

Introduction

Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices

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

The three types of advisories are defined as follows:

WARNING

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 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.

Important Responsible Refrigerant

Practices

Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified.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

Refrigerant under High Pressure!

System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives. Failure to recover refrigerant to relieve pressure or the use of nonapproved refrigerants, refrigerant substitutes, or refrigerant additives could result in an explosion which could result in death or serious injury or equipment damage.

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 PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to appropriate Material Safety Data Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.

•When working with or around hazardous chemicals, ALWAYS refer to the appropriate MSDS/SDS and OSHA/GHS (Global Harmonized System of Classification and Labelling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions.

•If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance

with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE.

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

© 2014Trane All rights reserved

SCXG-SVX01H-EN

Introduction

WARNING

Proper Field Wiring and Grounding

Required!

Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes.

NOTICE:

Use Copper Conductors Only!

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

Copyright

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

Trademarks

Trane, Intellipak,Tracer and theTrane logo are trademarks ofTrane in the United States and other countries.All trademarks referenced in this document are the trademarks of their respective owners.

Revision History

SCXG-SVX01H-EN (24 Jun 2014)

Updated to correct input line current for 575V, 15HP, with bypass.

SCXG-SVX01G-EN (23 Oct 2012)

Updated fan motor FLA data.

SCXG-SVX01H-EN

3

Table of Contents

Model Number Descriptions . . . . . . . . . . . . . . 6

Modular Series Self-Contained . . . . . . . . . . 6

Self-Contained Ship-With Accessory Model

Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Remote Air-Cooled Condenser . . . . . . . . . . 8

General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Modular Series Self-Contained Unit

Components . . . . . . . . . . . . . . . . . . . . . . . . . . 9

General Data . . . . . . . . . . . . . . . . . . . . . . . . . 11

Pre-Installation Considerations . . . . . . . . . . . 13

Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Contractor Installation Responsibilities . . 13

Unpackaging . . . . . . . . . . . . . . . . . . . . . . . . . 13

Dimensions & Weights . . . . . . . . . . . . . . . . . . 16

Service Clearances . . . . . . . . . . . . . . . . . . . . 24

Installation - Mechanical . . . . . . . . . . . . . . . . 25

Unit Handling Procedures . . . . . . . . . . . . . 25

Skid Removal . . . . . . . . . . . . . . . . . . . . . . 27

Installation Preparation . . . . . . . . . . . . . . . . 27

Split-Apart Unit Assembly . . . . . . . . . . . . 28

Unit Vibration Isolator Option . . . . . . . . . . 29

Duct Connections . . . . . . . . . . . . . . . . . . . . . 30

Plenum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Airside Economizer Installation . . . . . . . . . 31

Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . 32

Condenser Connections . . . . . . . . . . . . . . 32

Condensate Drain Connections . . . . . . . . 32

General Waterside Recommendations:

Cooling Towers . . . . . . . . . . . . . . . . . . . . 32

Waterside Piping Arrangements . . . . . . . 33

Water Temperature Requirements . . . . . 33

Waterside Economizer Installation

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Waterside Economizer with right-hand factory piping components . . . . . . . . . . . 35

Hydronic Coil Installation . . . . . . . . . . . . . . 36

Refrigerant System . . . . . . . . . . . . . . . . . . . 36

Interconnecting Piping . . . . . . . . . . . . . . . 37

Preliminary Refrigerant Charging . . . . . . . 37

Installation - Electrical . . . . . . . . . . . . . . . . . . . .39

Unit Wiring Diagrams . . . . . . . . . . . . . . . . . .39

Supply Power Wiring . . . . . . . . . . . . . . . . . .39

Selection Procedures . . . . . . . . . . . . . . . . . .40

Variable Frequency Drive Option (VFD) . . .41 Variable Frequency Drive Without ByPass 41 Variable Frequency Drive With ByPass . .45

Static Pressure Transducer Installation

(VAV units only) . . . . . . . . . . . . . . . . . . . . . . .49

Electric Heat Installation . . . . . . . . . . . . . . . .49

Standard with All IntelliPak Units . . . . . . .51

Zone Sensor Options for IntelliPak

Control Units . . . . . . . . . . . . . . . . . . . . . . . . .51 CV and VAV Unit Zone Sensor Options . .52

Integrated Comfort™ Systems Sensors

for CV and VAV Applications . . . . . . . . . . . .52

Zone Sensor Installation . . . . . . . . . . . . . . . .53

Programmable Zone Sensors . . . . . . . . . . .54

Time Clock Option . . . . . . . . . . . . . . . . . . . . .56

Remote Human Interface Panel Installation 56

Mounting the Remote Human Interface
(RHI) Panel . . . . . . . . . . . . . . . . . . . . . .	. . . . .57
Wiring the Remote Human Interface	. . . . .59
Connecting to Tracer Summit . . . . . .	. . . . .61
Programming the Time Clock Option	. . . . .61
Operating Principals . . . . . . . . . . . . . . . .	. . . . .63
Control Sequences of Operation . . . .	. . . . .63
Unoccupied Sequence of Operation .	. . . . .63
Occupied Sequence . . . . . . . . . . . . . . .	. . . . .64
Thermostatic Expansion Valve . . . . .	. . . . .66
Compressors . . . . . . . . . . . . . . . . . . . .	. . . . .66
Unit Airside Components . . . . . . . . . .	. . . . .71
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . .74
Points List . . . . . . . . . . . . . . . . . . . . . . .	. . . . .74
RTM Module . . . . . . . . . . . . . . . . . . .	. . . . .74
GBAS Module . . . . . . . . . . . . . . . . . .	. . . . .74
ECEM Module . . . . . . . . . . . . . . . . . .	. . . . .74
Tracer™ LCI-I Module . . . . . . . . . . . . .	. . . . .74
Constant Volume (CV) Points . . . . .	. . . . .74

4	SCXG-SVX01H-EN

Table of Contents

Variable Air Volume (VAV) Points .	. . . . . 75
BCI-Points List . . . . . . . . . . . . . . . . . . .	. . . . . 76
Phase Monitor . . . . . . . . . . . . . . . . . .	. . . . . 76
Unit Control Components . . . . . . . . .	. . . . . 76
RTM Module Board -
Standard on all Units . . . . . . . . . . .	. . . . . 76
Compressor Module (MCM) -
Standard on all Units . . . . . . . . . . .	. . . . . 78
Human Interface Module -
Standard on all Units . . . . . . . . . . .	. . . . . 78
Remote Human Interface Module Option 78
Waterside Module -
Standard on all water-cooled units	. . . . . 78
Heat Module . . . . . . . . . . . . . . . . . .	. . . . . 78
Ventilation Override Module
(VOM) Option . . . . . . . . . . . . . . . . .	. . . . . 78
Trane IntelliPak Communications
Modules . . . . . . . . . . . . . . . . . . . . .	. . . . . 79
Exhaust/Comparative Enthalpy (ECEM)
Module . . . . . . . . . . . . . . . . . . . . . .	. . . . . 80
Ventilation Control Module (VCM)	. . . . . 80
Generic Building Automation System
Module Option . . . . . . . . . . . . . . . .	. . . . . 80
Input Devices and System Functions . . . 82
Pre-Startup . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 85
Pre-Startup Checklist . . . . . . . . . . . . .	. . . . . 85
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 86
Final Refrigerant Charge . . . . . . . . . .	. . . . . 87
Start-up Procedure . . . . . . . . . . . . . . .	. . . . . 87
Startup Log . . . . . . . . . . . . . . . . . . . . .	. . . . . 88
Maintenance . . . . . . . . . . . . . . . . . . . . . .	. . . . . 90
Service Access . . . . . . . . . . . . . . . . . .	. . . . . 90
Variable Frequency Drive (VFD) . .	. . . . . 90
Variable Frequency Drive (VFD) -
Remote Mounted . . . . . . . . . . . . . .	. . . . . 90
Air Filters . . . . . . . . . . . . . . . . . . . . . . .	. . . . . 90
Inspecting and Cleaning Drain Pan .	. . . . . 90
Inspecting and Cleaning the Fan . . .	. . . . . 91
Supply Fan . . . . . . . . . . . . . . . . . . . . .	. . . . . 91
Fan Drive . . . . . . . . . . . . . . . . . . . . .	. . . . . 91
Fan Bearings . . . . . . . . . . . . . . . . . .	. . . . . 92
Fan Belt Tension . . . . . . . . . . . . . . .	. . . . . 93

Adjusting Belt Tension . . . . . . . . . . . . . . .94

Refrigerant System . . . . . . . . . . . . . . . . . . . .95

Refrigerant Leak Test Procedure . . . . . . . .95

Brazing Procedures . . . . . . . . . . . . . . . . . .96

System Evacuation Procedures . . . . . . . .97

Compressors . . . . . . . . . . . . . . . . . . . . . . . . .98

Scroll Compressor Failure Diagnosis

and Replacement . . . . . . . . . . . . . . . . . . . .98

Components . . . . . . . . . . . . . . . . . . . . . . . . . .99

Coil Fin Cleaning . . . . . . . . . . . . . . . . . . . . .100

Piping Components . . . . . . . . . . . . . . . . . . .102

Maintenance Periodic Checklists . . . . . . . .102

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Troubleshooting . . . . . . . . . . . . . . . . . . . . . .104

System Checks . . . . . . . . . . . . . . . . . . . . .104

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . .104

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . .113

SCXG-SVX01H-EN

5

Model Number Descriptions

Modular Series Self-

Contained

Digit 1 - Unit Model

S = self contained

Digit 2 - Unit Type

C	=	commercial
I	=	industrial

Digit 3 - Condenser Medium

W	=	water-cooled
R	=	remote air-cooled

Digit 4 - Development Sequence

G = modular series

Digit 5 - Refrigerant Circuit Configuration

U = independent, R-410A refrigerant

Digits 6, 7 - Unit Nominal Capacity

20 = 20Tons (water or air cooled)

25 = 25Tons (water or air cooled)

30 = 30Tons (water cooled only)

32 = 32Tons (air cooled only)

35 = 35Tons (water cooled only)

Digit 8 - Unit Voltage

6 = 200 volt/60 hz/3 ph

4= 460 volt/60 hz/3 ph

5= 575 volt/60 hz/3 ph

Digit 9 - Air Volume/Temp

Control

2= I-Pak & VFD & supply air temp

ctrl

3= I-Pak & VFD w/ bypass & supply air temp ctrl

4= I-Pak w/o vol. ctrl, w/ zone temp cool

5= I-Pak w/o vol. ctrl, w/ zone temp heat/cool

6= I-Pak w/o vol. ctrl, w/ supply air temp ctrl

8 = thermostat interface

Digits 10, 11 - Design Sequence

** = Factory Assigned

Digit 12 - Unit Construction

A= vertical discharge

B= vertical discharge with double wall

C= horizontal discharge

D= horizontal discharge w/ double wall

E= vertical discharge, ship separate

F= vert. dis. w/ double wall,

ship sep.

G= horizontal discharge, ship separate

H= horiz. dis. w/ double wall, ship sep.

Digit 13 - Plenum Type

B= std plenum w/ factory cut holes

C= low plenum w/ factory cut holes

E= std plenum w/ field cut holes

F= low plenum w/ field cut holes

H= std plenum double wall (perf) w/ field cut holes

J= low plenum double wall (perf) w/ field cut holes

L= std. plenum w/factory cut holes, ship separate

M= low plenum w/ factory cut holes, ship separate

P = std plenum w/ field cut holes, ship

separate

R= low plenum w/ field cut holes, ship separate

U= std plenum double wall (perf) w/ field cut holes, ship separate

V= low plenum double wall (perf) w/ field cut holes, ship separate

0 = without plenum

Digit 14 - Motor Type

2= ODP motor

3= TEFC motor

Digits 15, 16 - Motor HP

05	=	5 hp
07	=	7.5 hp
10	=	10 hp
15	=	15 hp
20	=	20 hp
25	=	25 hp

Digits 17, 18, 19 - Fan RPM

085	=	850 rpm
090	=	900 rpm
095	=	950 rpm
100	=	1000 rpm
105	=	1050 rpm
110	=	1100 rpm
115	=	1150 rpm
120	=	1200 rpm
125	=	1250 rpm
130	=	1300 rpm
135	=	1350 rpm
140	=	1400 rpm
145	=	1450 rpm
150	=	1500 rpm
155	=	1550 rpm
160	=	1600 rpm
165	=	1650 rpm
170	=	1700 rpm
175	=	1750 rpm
180	=	1800 rpm
185	=	1850 rpm

Digit 20 - Heating Type

A= steam coil, LH

B= hot water coil, LH

C= electric heat, 1 stage

F= hydronic heat ctrl interface

G= elec. heat ctrl interface,1 stage

K= steam coil ship separate, LH

L= hot water coil ship separate, LH

M= steam coil, RH

N= hot water coil, RH

P	=	steam coil ship separate, RH
R	=	hot water coil ship separate, RH
T	=	hi-cap. hot water coil, LH
U	=	hi-cap hot water coil, LH, ship
sep

V= hi-cap hot water coil, RH

W= hi-cap hot water coil, RH, ship

sep

0 = none

Digit 21 - Unit Isolators

A	=	isopads
B	=	spring isolators
0	=	none

Digit 22 - Unit Finish

1= paint - slate gray

2= protective coating

3= protective coating w/ finish coat

Digit 23

0 = none

Digit 24 - Unit Connection

1= disconnect switch

2= terminal block

3= dual point power

Digit 25 - Industrial Options

A= protective coated evaporator coil

B= silver solder

C= stainless steel screws

D= A and B

E= A and C

F= B and C

G= A, B and C

0 = none

Digit 26 - Drain Pan Type

A= galvanized sloped

B= stainless steel sloped

Digit 27 - Waterside Economizer

A= mechanical clean full capacity (4-row)

B= mechanical clean low capacity (2-row)

C= chemical clean full capacity

(4-row)

D= chemical clean low capacity (2-row)

E= mechanical clean full capacity (4-row) ship separate

F= mechanical clean low capacity (2-row) ship separate

G= chemical clean full capacity

(4-row) ship separate

H= chemical clean low capacity (2-row) ship separate

0 = none

6	SCXG-SVX01H-EN

Model Number Descriptions

Digit 28 - Ventilation Control

B= airside econ w/Traq™ damper (top O/A inlet)

C= airside econ w/ standard dampers (top O/A inlet)

E= airside econ w/Traq™ damper and comparative enthalpy (top O/A)

F= airside econ w/ std dampers and comparative enthalpy (top O/A)

H= none/ventilation for 2-position control interface

J= airside economizer interface

K= airside economizer interface w/ comparative enthalpy

0 =

None

Digit 29 - Water Piping

A= RH condenser connection

B= LH condenser connection

C= RH basic piping

D= LH basic piping

E= RH intermediate piping

F= LH intermediate piping

J= RH basic w/ flow switch

K= LH basic w/ flow switch

L= RH intermediate w/ flow switch

M= LH intermediate w/ flow switch 0 = none

Digit 30 - Condenser Tube Type

A= standard condenser tubes

B= 90/10 CuNi condenser tubes 0 = none

Digit 31 - Compressor Service

Valves

1	=	with service valves
0	=	none

Digit 32 - Miscellaneous System Control

1 = timeclock

2= interface for remote HI (IPCB)

3= dirty filter switch

4= 1 and 2

5= 1 and 3

6= 2 and 3

7= 1, 2, and 3

0 = none

Digit 33 - Control Interface

Options

A= Generic BAS Module; 0-5 VDC (GBAS)

B= Ventilation Override Module (VOM)

D = Remote Human Interface (RHI)

G= GBAS & VOM

H= GBAS & RHI

J = VOM & RHI

M= GBAS & VOM & RHI

N= BACnet Communications Interface (BCI)

P= BCI and GBAS

Q= BCI and VOM

R= BCI and RHI

T	=	BCI and GBAS and VOM
U	=	BCI and GBAS and RHI

V= BCI and VOM and RHI

W= BCI and GBAS and VOM and RHI

0 = None

1= LonTalk Comm5 Interface (LCI)

2= LCI and GBAS

3= LCI and VOM

4= LCI and RHI

5= LCI and GBAS and VOM

6= LCI and GBAS and RHI

7= LCI and VOM and RHI

8= LCI and GBAS and VOM and RHI

Digit 34 - Agency

T = UL agency listing 0 = none

Digit 35 - Filter Type

1= 2-inch construction throwaway

2= 2-inch med eff. throwaway

Digit 36 - Miscellaneous Control

Option

A= low entering air temp. protect device (LEATPD)

B= high duct temp t-stat

C= plenum high static switch

D= kit for heat mode output (w/t’stat)

E= A and B

F= A and C

G= B and C

H= A, B, and C

0 = None

SCXG-SVX01H-EN

7

Model Number Descriptions

Self-Contained Ship-

With Accessory

Model Number

Digit 1 - Parts/Accessories

P = parts/accessories

Digit 2 - Unit Model

S = self-contained

Digit 3 - Shipment

W = with unit

Digit 4 - Development Sequence

F= signature series

G= modular series

Digit 5 - Sensors and Other

Accessories

S = sensors

Digit 6 - Sensors and

Thermostats (Field Installed)

A= BAYSENS077 - zone temp only (CV and VAV)

B= BAYSENS073zone temp with timed override button (CV and VAV)

C= BAYSENS074 - zone temp with timed override button, setpoint dial (CV and VAV)

E= BAYSENS108 - CV zone sensor -dual setpoint, man/auto changeover

F= BAYSENS110 - CV zone sensordual setpoint, man/auto changeover w, indicastor lights

G= BAYSENS119 - CV/VAV programmable night setback Sensor

H= BAYSENS021 - VAV zone sensor with indicator lights

K= BAYSTAT150 2H/2C ProgTstat w/ BAYSTAT077 Remote Sensor

L= outside air temperature sensor

kit

M= outside air humidity sensor kit

N= BAYSTAT155 3H/2CTstat

P= BAYSTAT150 2H/2C ProgrammableTstat

0 = none

Digit 7 - Mixed Air Temperature

Protection Kit (Field Installed)

1= mixed air temperature protection kit

0 = none

Digit 8 - Carbon Dioxide Sensor

(Field Installed)

1	=	carbon dioxide sensor kit
0	=	none

Digit 9 - Future Option

0 = none

Digits 10, 11 - Design Sequence

** = Factory Assigned

Remote Air-Cooled

Condenser

Digit 1 - Unit Model

C = Condenser

Digit 2 - Unit Type

C	=	Commercial
I	=	Industrial

Digit 3 - Condenser Medium

R = Remote

Digit 4 - Development Sequence

C = C

Digits 5, 6, 7 - Nominal Capacity

020 = 20Tons

029 = 29Tons

032 = 32Tons

Digit 8 - Unit Voltage

4= 460 Volt/60 Hz/3 ph

5= 575 Volt/60 Hz/3 ph

6= 200 Volt/60 Hz/3 ph

Digit 9 - Control Option

0 = No Low Ambient, I-Pak

A= No Low Ambient,T-stat

B= Low Ambient, I-Pak

C= Low Ambient,T-stat

Digits 10, 11 - Design Sequence

** = Factory Assigned

Digit 12 - Unit Finish

1= Paint (Slate Gray)

2= Protective Coating

3= Protective Coating with Finish Coat

4= Unpainted Unit

Digit 13 - Coil Options

A	=	Non-Coated Aluminum
C	=	Protective Coated Aluminum

Digit 14 - Unit Isolators

0 = None

A= Spring Isolators

B= Isopads

Digit 15 - Panels

0	=	None
1	=	Louvered Panels

Digit 16 - Agency

0	=	None
T	=	UL Listing

8	SCXG-SVX01H-EN

General Data

Modular Series Self-Contained

Unit Components

Commercial self contained units are complete HVAC systems used in floor-by-floor applications. Units are easy to install because they feature a single point power connection, factory installed and tested controls, single water point connection, factory installed options, and an internally trapped drain connection. Modular selfcontained units can ship as split-apart units for installation ease. Split-apart units ship with a dry nitrogen charge and require field refrigerant charging.

Units consist of multiple hermetically sealed 3-D scroll compressors, water-cooled condensers (water-cooled units only), an evaporator coil, dual forward curved fans, and control panel. Air-cooled units require a remote aircooled condenser, model CXRC. Unit controls are either electromechanical thermostat or microprocessor controls on IntelliPak unit.

Hermetically sealed 3-D scroll compressor motors utilize internal motor protection and time delays to prevent excessive cycling.

Water-cooled condensers are shell and tube type with internal subcooler. Condensers are available as mechanically or chemically cleanable. Evaporator fan is double width, double inlet and forward curved with a fixed pitch belt drive assembly. Variable frequency drives are optional. EISA efficiency open drip proof (ODP) and totally enclosed fan cooled (TEFC) motor options are available.

Package water-cooled units ship with full refrigerant and compressor oil charge. Split apart water cooled, and air cooled, units ship with dry nitrogen charge and complete compressor oil charge.

Split apart water cooled units require field connection of suction and liquid lines. Air-cooled units require fieldpiping discharge and liquid lines to remote air cooled condenser.

All units have two refrigerant circuits that include filter drier (field installed in air cooled), liquid line service valve, sight glass/moisture indicator, thermal expansion valve with a sensing bulb and external equalizing line, suction and discharge line access ports, and high and low pressure cutout switches. Water-cooled units also include pressure relief valve. Air cooled units include liquid line solenoid valve and discharge line check valve.

Control Options

Units may be ordered with conventional thermostat interface or IntelliPak™ Direct Digital Control (DDC). IntelliPak controls include a Human Interface (HI) panel with two line by forty (40) character clear English display for easy operator interface to unit setup and control parameters. All basic setup parameters are preset from factory.

Human Interface Panel

HI is unit mounted and accessible without opening unit’s front panel. It allows easy setpoint adjustment using HI keypad. HI displays all unit operating parameters and conditions in a clear language display, which can be configured for either English, French, or Spanish.

Optional remote human interface (RHI) will control up to four self-contained units, each containing an interprocessor communications bridge (IPCB). It has the same features as unit-mounted HI except for service mode.

For more information on setpoint defaults, ranges and unit programming, see IntelliPak Self-Contained Programming Guide, PKG-SVP01*-EN that ships with each unit.

IntelliPak™ DDC Control

IntelliPak™ DDC Control provides “smart” unit control with safety features and control relays for pumps, dampers, etc. Modular Series IntelliPak self-contained unit is controlled by microelectronic control system consisting of a network of modules.These modules are referred to as unit control modules (UCM). In this manual, acronym UCM refers to the entire control system network.

These modules perform specific unit functions using proportional/integral control algorithms.They are mounted in the unit control panel and are factory wired to their respective internal components. Each module receives and interprets information from other unit modules, sensors, remote panels, and customer binary contacts to satisfy the applicable request; i.e., economizing, mechanical cooling, heating, ventilation. See the Operation section of this manual for a detailed description of each module’s function.

Optional Controls

Optional controls include a disconnect switch, dirty filter switch, water flow switch (water-cooled only), supply air temperature reset, or external setpoint inputs. Daytime heating is available on units with electric, steam, or hot water heat control options. Morning warmup operation is available on all units.

The static pressure probe, zone night heat/morning warmup, supply air temperature reset sensor options ship separate inside the unit control panel for field installation. For more detailed information on the unit control options, see the Owner’s section of this manual.

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9

General Data

Unit Nameplate

Unit nameplate, mounted on left end of unit control panel, identifies unit model number, service literature, and wiring diagram numbers.

Figure 1. IntelliPak™ commercial self-contained modular series unit

10	SCXG-SVX01H-EN

General Data

General Data

Table 1.		SCWG/SIWG/SCRG/SIRG general data
				Water-Cooled Units				Air-Cooled Units
		Unit Size	20	25	30	35	20	25	32
	Compressor Data
		Quantity	2	2	1/1	2	2	1/1	2
	Nominal Ton/Comp		10	10	10/15	15	10	10/15	15
		Circuits	2	2	2	2	2	2	2
	Evaporator Coil Data
		Rows	2	4	4	4	3	4	4
		Sq. Ft.	22.5	25.0	25.0	25.0	25.0	25.0	25.0
		FPF	144	144	144	144	144	144	144
	Condenser Data
	Minimum GPM w/o Econ		36	36	46	54	-	-	-
	Minimum GPM w/ Econ		41	41	60	65	-	-	-
		Maximum GPM	80	80	102	119	-	-	-
	Evaporator Fan Data
		Quantity	2	2	2	2	2	2	2
	Size (Dia. x width - inches)		12 5/8"x8"	12 5/8"x9"	12 5/8"x11"	12 5/8 x11"	12 5/8"x8"	12 5/8"x9"	12 5/8"x11"
		Minimum HP	5	5	5	5	5	5	5
		Maximum HP	20	25	25	25	20	25	25
	Minimum Design CFM		6350	7250	7250	7250	7250	7250	7250
	Maximum Design CFM		8500	10,625	12,750	14,875	8500	10,625	13600
	R-410A Refrigerant Data
		EER	14.0	14.3	14.1	14.0	10.0	10.1	10.4
		IEER (CV)	14.1	14.8	15.4	15.6	10.8	11.8	11.9
		IEER (VFD)	17.1	18.1	18.2	17.7	13.4	13.3	13.8
	Refrigerant Charge - lb (kg)
		Circuit A	19.0 (8.6)	24.0 (10.9)	24.5 (11.1)	23.0 (10.4)	See Note 3	See Note 3	See Note 3
		Circuit B	19.0 (8.6)	24.0 (10.4)	23.0 (10.4)	23.0 (10.4)	See Note 3	See Note 3	See Note 3
	Capacity Steps - %		100/53/0	100/53/0	100/65/42/6	100/53/0
	Filter Data
		Quantity	4	4	4	4	4	4	4
		Size (inches)	16x25x2	16x25x2	16x25x2	16x25x2	16x25x2	16x25x2	16x25x2
		Quantity	4	4	4	4	4	4	4
		Size (inches)	20x25x2	20x25x2	20x25x2	20x25x2	20x25x2	20x25x2	20x25x2
	CCRC/CIRC Condenser		-	-	-	-	20	29	32
	Match

Notes:

1.Compressors are Trane 3-D™scroll.

2.EER and IEER are rated in accordance to the AHRI Standard 340/360-2010. Based on 80/67°F (26.7/19.4°C) to the evaporator coil, nominal airflow and 85-95°F (29.4-35°C) condenser water or 95° F (35° C) ambient.

3.All units operate with R-410A. Water Cooled units ship with full operating charge. Air-cooled units ship with dry nitrogen charge. Field refrigerant system charge required. Refer to Table 2, p. 12 for amounts required.

4.Maximum cfm limits are set to prevent moisture carryover on the evaporator coil.

5.Minimum cfm limits are set to ensure stable thermal expansion valve operation at low load conditions.

6.Filter sizes are for units without hot water or steam heating coils

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11

General Data

Table 2. SCRG/SIRG self-contained and CCRC/CIRC remote air-cooled condenser

SCRG/SIRG & CCRC/CIRC
Unit Size	20/20	25/29	32/32
No. of Refrigerant Circuits	2	2	2
Operating Charge - lbs R-410A	36.5/36.5	48.5/36	46/46
Operating Charge - kg R-410A	16.6/16.6	22/16.3	20.9/20.9
Cond. Storage Cap. - lbs R-410A	37/37	51/37	51/51
Cond. Storage Cap. - kg R-410A	16.8/16.8	23.1/16.8	23.1/23.1

Notes:

1.Refrigerant charges are listed as circuit 1/circuit 2 and provide only an estimate. Final charge requires sound field charging practice.

2.Operating charge estimate includes the air-cooled self-contained, remote air-cooled condenser, and 25 feet of interconnecting refrigerant piping.

3.At conditions of 95°F (35°C), condenser storage capacity is 95% full.

4.To determine the correct amount of refrigerant needed for a particular application, reference the Trane Reciprocating Refrigeration Manual.

5.Field piping over 25 feet requires additional refrigerant. See Table 25, p. 37 and Table 26, p. 38 to determine amounts.

Table 3. CCRC/CIRC remote air-cooled condenser general data

	Unit Size	20	29	32
	Condenser Fan Data
	Number/Type/Drive 4/Prop/Direct		4/Prop/Direct	4/Prop/Direct
	Size (inches)	26	26	26
	HP ea.	1	1	1
	Nominal Cfm	18,800	21,200	32,000
	Condenser Coil Data
	Circuit 1 Size (in.)	1/46x71	1/46x71	1/64x71
	Circuit 2 No./Size (in.)	1/46x71	1/64x71	1/64x71
	Face Area (sq. ft.)	45.4	54.2	63.1
	Rows/fpf	4/144	4/144	4/144
	Ambient Temperature Operating Range
	Standard Ambient (°F)	50-115	50-115	50-115
	Low Ambient Option	0-115	0-115	0-115
	(°F)

Table 4. SCWG/SIWG/SCRG/SIRG self-contained heating coil

Filter Data for Heating Coil

	Quantity	4
	Size (inches)	20x18x2
	Size (mm)	(508x457x51)
	Quantity	8
	Size (inches)	20x20x2
	Size (mm)	(508x508x51)
			Row	No.	No.
	Coil Data	Type	s	Size (in) Size (mm)		fpf
	Steam Coil	NS	1	2	2
					609.6x1473.	42
				24 x 58
					2
	Hot Water Coil,	5W	1	1	1	80
	std. cap			48 x 62	1219 x 1575
	Hot Water Coil,	5W	2	1	1	108
	hi-cap.			48 x 62	1219 x 1575

Notes:

1.Hot water and steam heating coils have Prima-Flo® fins and do not have turbulators.

2.For coil capacities, use TOPSS™ (Trane Official Product Selection Program).

Table 5. Waterside economizer coil physical data - SCXG 20, 25, 30, 35

			Height	Length
Type	Rows	FPF	(in)	(in)
Chemically Cleanable	2	108	50	72
Mechanically Cleanable	2	108	50	72
Chemically Cleanable	4	108	50	72
Mechanically Cleanable	4	108	50	72

12	SCXG-SVX01H-EN

Pre-Installation Considerations

Receiving

Receiving Checklist

Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage.

•Inspect individual cartons before accepting. Check for rattles, bent carton corners, or other visible indications of shipping damage.

•If a unit appears damaged, inspect it immediately before accepting the shipment. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.

•Inspect the unit for concealed damage before it is stored and as soon as possible after delivery. Report concealed damage to the freight line within the allotted time after delivery. Check with the carrier for their allotted time to submit a claim.

•Do not move damaged material from the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.

•Do not continue unpacking the shipment if it appears damaged. Retain all internal packing, cartons, and crate.Take photos of damaged material if possible.

•Notify the carrier’s terminal of the damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.

Notify yourTrane representative of the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.

Ship-Separate Accessories

Field-installed sensors ship separately inside unit’s main control panel. Extra filters, sheaves, and belts ship in unit’s fan motor section. Condenser plugs, spring isolators, and isopads ship in unit’s bottom left side.

Contractor Installation

Responsibilities

Complete the following checklist before beginning final unit installation.

•Verify the unit size and tagging with the unit nameplate.

•Make certain the floor or foundation is level, solid, and sufficient to support the unit and accessory weights. Level or repair the floor before positioning the unit if necessary.

•Allow minimum recommended clearances for routine maintenance and service. Allow space at end of the

unit for shaft removal and servicing. Refer to unit submittals for dimensions. See also “Service Clearances,” p. 24.

•Allow three fan diameters above the unit for the discharge ductwork. Return air enters the rear of the unit and conditioned supply air discharges through the top.

•Electrical connection knockouts are on the top, left side of the unit.

•Allow adequate space for piping access and panel removal. Condenser water piping, refrigerant piping, and condensate drain connections are on the lower left end panel.

Note: Unit height and connection locations will change if using vibration isolators.The unit height may increase up to 5 7/8” with spring type isolators.

•Electrical supply power must meet specific balance and voltage requirements as described in section “Installation - Electrical,” p. 39.

•Water-cooled units only:The installer is responsible for providing a condenser main, standby water pump, cooling tower, pressure gauges, strainers, and all components for waterside piping. See “Water Piping,” p. 32 for general waterside recommendations.

•Air-cooled units only:The installer is responsible for providing and installing the remote air-cooled condenser and refrigerant piping.

Unpackaging

Commercial self-contained units ship assembled with protective coverings over the coil and discharge openings. Figure 2, p. 14 illustrates a typical shipping package.

Unit Protective Covers

Remove the shipping protection coverings from the human interface panel (HI) at the control panel, the filter box (or air inlet opening), the discharge air opening, and optional variable frequency drive (VFD).

Supply Fan Isolators

Remove the shipping channels and mounting bolts from beneath the fan. See Figure 4, p. 15. Open both fan compartment access doors to access the channels.There are four mounting points for 20-38 ton units.

Note: For 20-38 ton units, do not remove the fan assembly shipping blocks and tie down bolts if the fan speed is 750 rpm or less.

While keeping the fan mounting frame level, turn the fan isolator height adjusting bolts until the fan housing P- gasket compresses 1/4” against the roof transition piece. See Figure 4, p. 15.

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13

Pre-Installation Considerations

Figure 2. Typical unit mounting on shipping skid

Figure 3. Fan isolator locations

14	SCXG-SVX01H-EN

Pre-Installation Considerations

Figure 4. Supply fan horizontal isolation shipping bracket

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15

Dimensions & Weights

Table 6. SCWG/SIWG weight, lbs.

Unit Tons	Base Weight - lb (kg)
20	2227 (1010)
25	2697 (1223)
30	2765 (1254)
35	2834 (1286)

Notes:

1.All unit weights include refrigerant, water and controllers, electric heat and valves.

2.Add 150 lbs. to total weight to obtain approximate shipping weight.

3.Split-apart unit weights are approximately: 60% total unit weight = compressor section, 40% total unit weight = fan section.

Table 7. SCRG/SIRG weight, lbs (kg)

unit tons	base weight
20	2311 (1048)
25	2380 (1079)
32	2448 (1110)

Notes:

1.All unit weights include refrigerant, water and controllers, electric heat and valves.

2.Add 150 lbs. to total weight to obtain approximate shipping weight.

3.Split-apart unit weights are approximately: 60% total unit weight = compressor section, 40% total unit weight = fan section.

16	SCXG-SVX01H-EN

Dimensions & Weights

Figure 5. SCWG/SIWG, in.

6.75”

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17

Dimensions & Weights

Figure 6. SCRG/SIRG, in.

6.75”

18	SCXG-SVX01H-EN

Dimensions & Weights

Table 8. Detail dimensions, in.

Model		A		B	C	D	E		F
SCWG/SCRG	20	20	10	3/4	58 1/2	5 1/8 13	1/4 11		1/2
SCWG/SCRG	25	19 1/4 12		1/4	57 5/8	5 1/8 13	1/4 11		1/2
SCWG 30 - 35		18	14	5/8	56 1/2	5 1/8 13	1/4	11	1/2
SCRG 32

Figure 7. SCRG/SIRG/SCWG/SIWG detail “A” electrical connections, in.

Note: When unit is ordered with horizontal supply, ensure that all applicable codes are considered when installing equipment. Special attention should be made to over head clearances of unit/ ducting to meet code requirements.

Figure 8. Detail “B” discharge options, in.

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19

Dimensions & Weights

Figure 9. CCRC/CIRC air-cooled condenser

OPTIONAL LOW AMBIENT DAMPER (ONE DAMPER PER CIRCUIT)

REFRIGERANT

LINE

CONNECTIONS

FRONTAL VIEW

AC

REFRIGERANT CIRCUIT 2

REFRIGERANT CIRCUIT 1

OPTIONAL LOW

AMBIENT DAMPER

24VOLTWIRE ENTRY HOLE SIZED FOR 3/4” CONDUIT

115VOLTWIRE ENTRY HOLE SIZED FOR

3/4” CONDUIT

SUPPLYVOLTAGEWIRE ENTRY HOLE

SIZED FOR 1” CONDUIT

B

C

(LIQUID LINE CONNECTION REFRIG. CIRCUIT 1) (HOT GAS CONNECTION REFRIG. CIRCUIT 1)

(LIQUID LINE CONNECTION REFRIG. CIRCUIT 2) (HOT GAS CONNECTION REFRIG. CIRCUIT 2)

Table 9. CCRC/CIRC air-cooled condenser dimensions & weight, in-lbs.

Model	AA		AB	AC	shipping weight	operating weight
CCRC/CIRC 20	70	1/8	88	88	2030	1906
CCRC/CIRC 29	70	1/8	88	88	2084	1960
CCRC/CIRC 32	70	1/8	88	88	2138	2014

Table 10. CCRC/CIRC refrigerant connections, in.

Model	E	F	G	H	J	K	L	M	N
CCRC/CIRC 20-32	66 7/8	14 3/8	18 1/2	24 3/4	29	5/8	7/8	5/8	7/8

Table 11. CCRC/CIRC electrical connections, in.

Model	A	B	C
CCRC/CIRC 20-32	4 1/2	10 1/2	17 1/2

20	SCXG-SVX01H-EN

Dimensions & Weights

Figure 10. Hot water coil: left-hand connections

Table 12. Hot water coil dimensions & weight, in-lbs

	A	B	C	D	E	F	G	H	J	K	Weight
one-row coil	53 3/4	4 7/8	73 1/2	16 5/8	6 3/4	7 1/2	23 1/8	37 1/4	1 3/4	2 1/2	415
two-row coil	53 3/4	5 1/8	73 1/2	16 5/8	6 3/4	7 1/2	22 3/8	37 1/4	2 3/4	3 5/8	510

Figure 11. Hot water coil: right-hand connections

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21

Dimensions & Weights

Figure 12. Steam coil: left connections

	92 3/4"	22 1/2"
	73 1/2"
		53 13/16"
	VERTICAL	3 5/16"
		15 7/8"	CONDENSER
	DISCHARGE	1"	FITTINGS
			1 1/2" NPTI
30 7/8"	3/4" (4X) ISOLATOR	36 15/16" 40 15/16"	ELECTRICAL
	MOUNTING LOCATION		CONNECTIONS
	ON BOTTOM OF UNIT

2 1/8"
14 9/16"	64 1/2"	11"	9 3/8"	35"

	Note: Steam Coil Weight 460 Lbs.	3 7/8"
TOP VIEW		6 3/4"
		16 15/16"

LEFT VIEW

Figure 13. Steam coil: right connections

CONDENSATE RETURN TRAP	VACUUM BREAKER 1"
1 1/2" FEMALE CONN	FEMALE CONN

STEAM INLET 1"

FEMALE CONN VACUUM BREAKER 1"

FEMALE CONN

CONDENSATE RETURN TRAP 1" FEMALE CONN

	92 3/4"
	73 1/2"	VERTICAL	22 1/2"
		DISCHARGE		53 13/16"
			3 5/16"
		PIPING CONNECTIONS
			15 7/8"
		2 1/2" NPTE
			1"
		3/4" (4X) ISOLATOR
		MOUNTING LOCATION
30 7/8"		ON BOTTOM OF UNIT	40 15/16"
				36 15/16"
2 1/8"
11"	64 1/2"	10 15/16"
			35"
	TOP VIEW		3 7/8"
		Note: Steam Coil Weight 460 Lbs.	9 3/8"
			6 3/4"
			16 15/16"

RIGHT VIEW

22	SCXG-SVX01H-EN

Dimensions & Weights

Figure 14. Electric Heat Coil

Table 13. Electric heat coil dimensions & weight, in-lbs.

	Unit Size	A	B	C	D	Weight
	20 tons	70 1/4	4 7/8	11 1/2	19	460
	25 tons	70 1/4	4 1/8	11 1/2	19	460
	30 - 35	70 1/4	2 7/8	11 1/2	19	460
	tons

Note: Coil box height is 8 in.

Figure 16. Waterside Economizer

Table 15. Waterside economizer weight, in-lbs.

		Weight
Unit size	2-row	4-row
20 - 35 tons	488	584

Figure 15. Flexible horizontal discharge plenum

Figure 17. Airside Economizer

Table 14. Flexible horizontal discharge plenum dimensions & weights, in-lbs.

20-35 tons	A	B	C	Weight
Low height	35	17 1/4	86 1/2	262
Standard height	35	25 1/4	86 1/2	352

Table 16. Airside economizer dimensions & weight, in-lbs.

Unit Size

A

B

C D

E

F (1)

F (2)

G (1)

G (2)

H (1) H (2)

J

K

L

M

Weight

SCWG/SIWG 20, 25

36

65 5/8

37 74 1/4

6 1/8

56 1/2

49 3/4

23 1/4

20 1/2

5 5/8

7

20 1/2

17 1/8

12

49 3/4

273

SCRG/SIRG 20

SCWG/SIWG 30, 35

36

65 5/8

37 74 1/4

6 1/8

61 3/8

62 3/4

28 1/8

20 1/2

3 1/4

7

20 1/2

17 1/8

5 1/2

62 3/4

273

SCRG/SIRG 25, 32

SCXG-SVX01H-EN

23

Dimensions & Weights

Service Clearances

Figure 18. Detail “B” (top) and Detail “A” (bottom)

See Figure 19, p. 24 and Figure 20, p. 24 for recommended service and code clearances.

Figure 19. Top view CCRC/CIRC 20, 29, 32

96” (2132 mm)

48”	48”
(1066 mm)	(1066 mm)

Control

Panel

96” (2132 mm)

Table 17. Service and code clearance requirements

Side	Distance	Purpose
front	42 in.	NEC code requirement
	(20-38 tons)
	18 in.	air-cooled units only
left	36 in.	refrigeration & waterside component service
	77 in.	fan shaft removal
right	36 in.	provides uniform airflow
inlet	18 in.	provides uniform airflow

Table 18. Service and code clearance requirements

Side	Distance	Purpose
front	42 in.	NEC code requirement
	(20-38 tons)
	18 in.	air-cooled units only
left	36 in.	refrigeration & waterside component service
	77 in.	fan shaft removal
right	36 in.	provides uniform airflow
inlet	18 in.	provides uniform airflow

Note: When unit is ordered with horizontal supply, ensure that all applicable codes are considered when installing equipment. Special attention should be made to overhead clearances of unit/ ducting to meet code requirements.

Figure 20. Top view of self-contained unit showing recommended service and code clearances

air inlet

18” minimum

See	36”
table	minimum

	42” minimum	Control Panel

24	SCXG-SVX01H-EN

Installation - Mechanical

Unit Handling Procedures

WARNING

Improper Unit Lift!

Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level. Failure to properly lift unit could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury and possible equipment or property-only damage.

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.

Figure 21. Assembled unit gravity block location

Before lifting the unit or modular component, determine the approximate center of gravity for lifting safety. See Figure 21, p. 25 for assembled modular units and Figure 22, p. 26 for split-apart units.The center of gravity may vary slightly within the gravity block depending on unit options.

Always test-lift the unit to determine the exact unit balance and stability before hoisting it to the installation location. See Figure 23, p. 26 and Figure 24, p. 27 for typical rigging procedures and proper rigging equipment usage.

Table 19. Gravity block dimensions

Model	A	B	C	D
SCWG	36	14	38	12
SCRG	36	16	40	12

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25

Installation - Mechanical

Figure 22. Split-apart unit gravity block location

Fan Section Only

Compressor Section Only

Figure 23. Split-apart modular unit proper rigging (L) and fan section (R)

26	SCXG-SVX01H-EN

Installation - Mechanical

Figure 24. Assembled modular unit proper rigging

Skid Removal

The unit ships on skids to provide forklift locations from the front or rear.The skid allows easy maneuverability of the unit during storage and transportation. Remove the skids before placing the unit in its permanent location.

Remove the skids using a forklift or jack. Lift one end of the unit off of the skids. See Figure 21, p. 25 and Figure 22, p. 26 for unit gravity block location. Slide the skids out and lower the unit at the installation location.

NOTICE:

Equipment Damage!

Do not use hooks to lift unit or hook into open channels to lift unit.This could cause unit damage

1.Position rigging sling under wood shipping skid.

2.Use spreader bars to avoid unit damage.

3.When using a forklift, exercise caution to prevent unit damage.

4.Use the standard fork length to lift one end and drag or pull unit while skidding the opposite end.

5.The unit center of gravity will fall within center of gravity block at various locations depending on unit options.

6.Use hooks to lift fan section only. Do not hook into open channels to lift unit.

7.See unit nameplate for unit weight.

8.Do not stack units.

Installation Preparation

Important: Before installing the unit, perform the following procedures to ensure proper unit operation.

Before installing the unit, perform the following procedures to ensure proper unit operation.

1.Position the unit and skid assembly in its final location. If unit shipped split-apart, follow the procedure in the “Split-Apart Unit Assembly,” p. 28 before completing this step.Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location. See Figure 23, p. 26 and

Figure 24, p. 27 for typical rigging procedures, including cautions and proper uses of such equipment as fork lifts, spreader bars, and hooks.

2.Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location. See “Unit Handling Procedures,” p. 25 for proper rigging procedures and cautions.

3.Remove the skids from under the unit. See “Skid Removal,” p. 27.

4.Remove the protective shipping covers from the unit.

5.Verify isolators are properly tightened for operation. See “Unit Vibration Isolator Option,” p. 29.

Note: Unit height and connection locations will change if external vibration isolators are used.The unit may be raised an additional 5-7/8 inches with springtype isolators.

Note: Unit height and connection locations will change if the unit is constructed to be split-a-part in the field. See unit submittal drawings for connection locations.

6.Tighten compressor isolator mounting bolts.Torque to 18 ft. lbs. (± 2 ft. Lbs.)

7.Electrical supply power must meet specific balance and voltage requirements, as described in section “Installation - Electrical,” p. 39.

8.Water-cooled units only (model SCWG):The installer must furnish and install a condenser main and standby water pump, cooling tower, pressure gauges and all components for the waterside piping. See “General Waterside Recommendations: CoolingTowers,” p. 32.

9.Air-cooled units only (model SCRG):These units require field-installation of a remote air-cooled condenser and refrigerant piping. See “Refrigerant System,” p. 36.

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Installation - Mechanical

Split-Apart Unit Assembly

1.Ensure the tagging information on the fan section nameplate matches that on the compressor nameplate.

2.Remove the connector brackets holding the sheet metal shipping cover on compressor section. Retain brackets and screws.

3.Remove shipping cover from the compressor section and verify the ship-with package contains:

a.suction and liquid line couplings

b.insulation

c.sheet metal screws

4.Lift fan section onto the compressor section using the rigging method in Figure 23, p. 26.

5.Remove skid from the fan section, placing the fan section onto the compressor section. Reference Figure 26, p. 29.

6.Install the connection brackets with the sheet metal screws (referenced in step 2) on all sides of the unit. Reference Detail “A” in Figure 26, p. 29.

7.Remove the unit panels labeled RU and RL in Figure 25,

p.28. To remove panels, first remove the four shipping screws located in the corner of each panel. Next, turn the remaining 1/4 turn fasteners to the unlatch position.The panel is supported by a “lip” channel. So, lift the panel up and off the unit to remove it. See Detail “A” in Figure 26, p. 29.

8.Connect the drain hose to the drainpan outlet fitting and secure it with the drain hose clamp provided.

9.See “Refrigerant System,” p. 36 for piping procedures.

10.Remove panel FLR and open the bottom control panel door, FLL. Pull the fan motor leads (coiled in the fan

section) through the knockout in the bottom of the fan section to the control panel. Ensure that the bushing is installed in the hole to prevent the wires from chafing. Refer to the unit wiring diagrams to connect the fan motor leads properly and ensure correct phase sequencing.

IntelliPak Units (UCM) Only

11.Remove panels FML, FMM, and FMR.

12.Pull the circular plug connector (CPC) from the compressor section through the knockouts into the fan section. Install the bushings (provided on the wiring harnesses) in the knockouts.\

13.Using the CPC wiring diagram, connect the male CPC to the female CPC in the top control panel.

14.If the unit has the mixed air temperature option, route the capillary tube on back of the filter rack.

Units with Thermostat Only

15.Remove panel FMR. See Note 1 on Figure 25, p. 28.

16.Pull frost protection wires from the bottom control panel through knockouts in bottom of fan section. Route wires to the appropriate frost protection switches on the evaporator coil. Reference the unit wiring diagrams to connect frost protection wiring connectors.

Air-Cooled Units Only

17.Route the refrigerant circuit wires for circuits 1 and 2 from the bottom control panel through the knockouts to the solenoid valves.The solenoid valves are located in the liquid refrigerant lines on the right-hand side of the unit. Refer to the unit wiring diagrams to make splice connections.

Figure 25. Modular unit panel description and internal connections

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Installation - Mechanical

Figure 26. How to assemble the modular unit

Unit Vibration Isolator Option

If your job requires external vibration isolation, two options are available: isopads or spring-type isolators. Isopads should be placed under the unit at locations indicated on the factory-provided isolator sheet.

Set the spring-type isolators (Figure 27, p. 29) in position after the unit is removed from skids before making electrical, piping, or duct connections. All units require a minimum of four isolators per unit. But some may require six isolators, depending upon unit options.

Note: Trane strongly recommends you consult a vibration specialist before double-isolating the unit. Double isolation is not recommended.

If you decide to externally isolate the unit, use spring-flex, type CP isolators.The spring number is marked on the outer housing. See Figure 27, p. 29.

To install external isolators, complete the following procedure.

1.Locate the isolators under unit base at the locations indicated on the factory-provided isolator placement sheet. Lift one end of the unit at a time to position isolators to the floor, using anchor bolts.

2.Level the unit by adjusting isolator heights. Unit weight may cause the upper housing to rest on the lower housing of the spring isolators.The isolator clearance shown in the side view of Figure 27, p. 29, must be 1/4 - 1/2 inches.To increase the clearance, lift the unit off the isolator and turn the leveling bolt counterclockwise. Recheck the unit level and the housing clearances. Maximum allowable difference

between isolator heights is 1/4 inch. Shim as required under the isolators.

Note: The compressors and fan assembly are internally isolated on most units. Due to this, the addition of external isolation devices (spring mounting isolators) is at the discretion of the building or HVAC system designer.

Figure 27. Optional spring isolator dimensional data

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Installation - Mechanical

Duct Connections

WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/ tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

For additional information regarding the safe discharge of capacitors, see PROD-SVB06A-EN

Return air enters the rear of the unit and conditioned supply air discharges through the top. Attach supply air ductwork directly to the unit’s top panel, around the fan discharge opening. A duct collar is not provided.

Note: Units equipped with the flexible horizontal discharge plenum option may include a duct collar when holes are factory cut. If discharge openings are field-cut, refer to the “Plenum Installation” section.

Install all air ducts according to the National Fire Protection Association standards for the “Installation of Air Conditioning and Ventilation Systems other than ResidenceType (NFPA 90A) and ResidenceType Warm Air Heating and Air Conditioning Systems (NFPA 90B).

Make duct connections to the unit with a flexible material such as heavy canvas. If a fire hazard exists,Trane recommends using Flexweave 1000, type FW30 or equivalent canvas. Use three inches for the return duct and three inches for the discharge duct. Keep the material loose to absorb fan vibration.

Note: The compressors and fan assembly are internally isolated.Therefore, external isolation devices (spring mounting isolators) are at the discretion of a vibration specialist consulted by the building or HVAC system designer.

Figure 28. Duct connection recommendations

Discharge

Duct

3 Fan

3-inch Diameters

Flexible

Duct

Return

Air

Run the ductwork straight from the opening for a minimum of three fan diameters. See Figure 28, p. 30. Extend remaining ductwork as far as possible without changing size or direction. Do not make abrupt turns or transitions near the unit due to increased noise and excessive static losses. Use elbows with splitters or turning vanes to minimize static losses.

Poorly constructed turning vanes may cause airflow generated noise. Align the fan outlet properly with the ductwork to decrease noise levels in the duct and to increase fan performance. To complete trunk ductwork to the VAV terminal units, refer to the VAV box manuals for specific requirements. Check total external static pressures against fan characteristics to be sure the required airflow is available throughout the ductwork.

To achieve maximum acoustical performance, minimize the duct static pressure setpoint

Plenum

Before installing the plenum attach the insulation strip that ships with the plenum. See Figure 29, p. 31 for proper insulation location. Align the plenum front with the control panel side of the unit. Using the strips and screws provided, secure the plenum to the unit.

Treat field-cut holes to prevent fiberglass from entering the airstream.

Note: Plenum insulation must be applied properly to prevent air bypass around the plenum. See Figure 29, p. 31.

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