IntelliPak Self-Contained Modu
Installation, Owner, and
Diagnostic Manual
®
IntelliPak
Commercial Self-Contained
Modular Series, 20-35 Ton
Models
“BO” and later Design Sequence
SCWG -020, -025, -030, -035
SIWG -020, -025, -030, -035
SCRG -020, -025, -032
SIRG -020, -025, -032
July 2000
SCXG-SVX01B-EN
General
Information
About This Manual
Literature Change History
Use this manual for commercial selfcontained models SCWG, SIWG, SCRG,
and SIRG. This is the original issue of this
manual. It provides specific installation,
owner maintenance, and diagnostic
troubleshooting instructions for “BO” and
later design sequences. The “BO” design
sequence includes the VFD option
change from Square D Altivar 66 to
Altivar 58. For information on previous
design sequences, contact your local
Trane representative.
Warnings and Cautions
Warnings in this manual indicate potential
hazardous situations that can result in
death or serious injury.
Cautions in this manual indicate potential
hazardous situations that may result in
minor or moderate injury and/or
equipment damage.
Examples:
WARNING
!
Disconnect electrical power
source before servicing unit to
prevent injury or death from
electrical shock.
ECEM = Exhaust/comparative enthalpy
module
F/A = Fresh air
GBAS = Generic building automation
system
HGBP = Hot gas bypass
HI = Human Interface
HVAC = Heating, ventilation and air
conditioning
IGV = Inlet guide vanes
I/O = Inputs/outputs
IOD= Installation/owner/diagnostic
manual
IPC = Interprocessor communications
IPCB = Interprocessor communications
bridge
LH = Left-hand
MCM = Multiple compressor module
MWU = Morning warmup
NSB = Night setback
O/A = Outside air
psig = Pounds-per-square-inch, gauge
pressure
R/A = Return air
RH = Right-hand
RPM = Revolutions-per-minute
S/A = Supply air
SCM = Single circuit module
SZ = Single-zone (unit airflow)
TCI = Tracer
UCM = Unit control modules
VAV = Variable air volume
VCM = Ventilation control module
VOM = Ventilation override module
w.c. = Water column
WSM = Waterside module
ZSM = Zone sensor module
®
communications module
CAUTION
!
Use only copper conductors for
electrical unit connections to
prevent equipment damage.
Common HVAC Acronyms
For convenience, a number of acronyms
and abbreviations are used throughout
this manual. These acronyms are
alphabetically listed and defined below.
BAS = Building automation systems
CFM = Cubic-feet-per-minute
CKT. = Circuit
CV = Constant volume
CW = Clockwise
CCW = Counterclockwise
E/A = Exhaust air
©American Standard Inc. 2000 SCXG-SVX01B-EN
Special Note on Refrigeration
Emissions
World environmental scientists have
concluded that ozone in our upper
atmosphere is being reduced due to the
release of CFC fully halogenated
compounds.
The Trane Company urges all HVAC
service personnel to make every effort to
prevent any refrigerant emissions while
installing, operating, or servicing equipment. Always conserve refrigerants for
continued use.
Contents
Cross reference to related publications/information:
IntelliPak® Self-Contained Programming Guide, PKG-SVP01B-EN
Remote Air-Cool-Condenser Installation, Owner, and Diagnostic Manual, CXRCSVX01A-EN
Installation
General Information
Pre-installation Considerations
Dimensions/Weights
Mechanical Requirements
Electrical Requirements
Pre-Startup Requirements
Programming
Startup
Owner
General Information
Sequence of Operation
Maintenance
Diagnostic Troubleshooting
Troubleshooting
Diagnostics
2
2
9
17
33
37
39
64
74
77
77
91
98
111
111
112
SCXG-SVX01B-EN 3
General
Modular Series Self-Contained
Unit Components
Commercial self contained units are
complete HVAC systems used in floor-byfloor 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 self-contained units can ship as
split-apart units for installation ease. Splitapart units ship with a dry nitrogen
charge and require field refrigerant
charging.
Units consist of multiple 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. The
hermetically sealed 3-D scroll
compressor motors utilize internal motor
protection and time delays to prevent
excessive cycling. Unit controls are either
an electromechanical thermostat or
microprocessor controls on the IntelliPak
unit. See Figure I-GI-1 for a typical unit.
The hermetically sealed 3-D scroll
compressor motors utilize internal motor
protection and time delays to prevent
excessive cycling.
The water-cooled condensers are shell
and tube type with an internal subcooler.
Condensers are available as mechani-
Installation
cally or chemically cleanable. The
evaporator fan is double width, double
inlet and forward curved with a fixed
pitch belt drive assembly. Frequency
drives or inlet guide vanes are optional.
Motor options are standard efficiency
open drip proof (ODP) or totally enclosed
fan cooled (TEFC); or premium efficiency
ODP.
All water-cooled units ship with a full
refrigerant and oil charge. Air-cooled
units ship with oil and a dry nitrogen
holding charge and require field-piping
refrigerant connections to the air cooled
Information
condensing unit. Also, air-cooled units
have two refrigerant circuits. Watercooled units have four refrigerant circuits;
which include a filter drier, pressure relief
valve, liquid line service valve, sight glass/
moisture indicator, thermal expansion
valve with a sensing bulb and external
equalizing line, discharge line shrader
valve, a suction line shrader valve, and
high and low pressure cutout switches.
Water-cooled units also include a liquid
line service valve for each circuit.
For more detailed information, see the
Owner’s section of this manual.
Figure I-GI-1. IntelliPak® commercial self-contained Modular Series unit.
4 SCXG-SVX01B-EN
General
Installation
Control Options
Units can have either a thermostat
control or IntelliPak
network.
IntelliPak
Standard controls supplied with the
IntelliPak
interface (HI) panel with unit control
module (UCM), hi/lo inlet air temperature
sensor, and frost protection. All setup
parameters are preset from the factory.
Human Interface Panel
The HI is unit mounted and accessible
without opening the unit’s front panel. It
allows easy setpoint adjustment using
the HI keypad. In addition, the HI displays
all unit operating parameters and
conditions in a clear language display,
which can be configured for either
English, French, or Spanish.
The optional remote human interface
(RHI) will control up to four self-contained
units, each containing an interprocessor
communications bridge (IPCB). It has all
the same features as the unit-mounted HI
except for the service mode.
For more information on setpoint defaults
and ranges and unit programming, see
the
ming Guide, PKG-SVP01B-EN
ships with each unit.
Unit Control Module
The UCM provides “smart” unit control
with safety features and control relays
for pumps, dampers, etc. The Modular
Series IntelliPak® self-contained unit is
controlled by a microelectronic control
system that consists of a network of
modules. These modules are referred to
®
Unit Controls
®
unit include the human
IntelliPak® Self-Contained Program-
®
UCM control
. A copy
Information
as unit control modules (UCM). In this
manual, the 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 Owner’s 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. Night heat/morning warmup is
available with electric, steam, or hot
water heat control options.
The static pressure probe, zone night
heat/morning warm up, 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.
Unit Nameplate
The unit nameplate identifies the unit
model number, appropriate service
literature, and wiring diagram numbers. It
is mounted on the left end of the unit
control panel.
SCXG-SVX01B-EN 5
General
Installation
Information
Model Number Description
Each self-contained unit has a multiple character model number unique to that unit. To determine a unit’s specific options, reference
the model number on the unit nameplate using the model number explanation below.
S C W G N 20 4 2 BO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
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
N = Independent
Digit 6, 7 - Unit Nominal Capacity
2 0 = 20 Tons (Water or Air Cooled)
2 5 = 25 Tons (Water or Air Cooled)
30 = 30 Tons (Water Cooled Only)
32 = 32 Tons (Air Cooled Only)
35 = 35 Tons (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
1 = I-Pak & IGV and Supply Air Temp
Ctrl
2 = I-Pak & VFD and Supply Air
Temp Ctrl
3 = I-Pak & VFD w/ Bypass and
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
9 = Thermostat Interface w/Anti-Short
Cycle Timer
A = Thermostat Interface w/
Compressor Start Delay
B = Thermostat Interface w/Anti-Short
Cycle Timer and Comp. Start Delay
Digit 10, 11 - Design Sequence
BO = “B” Design
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 = Vertical Discharge w/ Double Wall,
Ship Separate
G = Horizontal Discharge, Ship Separate
H = Horizontal Discharge w/ Double
Wall, Ship Separate
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 with 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
1 = Std. Efficiency ODP
2 = Premium Eff. ODP
3 = Std. Efficiency Totally Enclosed
Digit 15, 16 - Motor HP
05 = 5 HP Motor
07 = 7.5 HP Motor
10 = 10 HP Motor
15 = 15 HP Motor
20 = 20 HP Motor
25 = 25 HP Motor
Digit 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
0 = None
Digit 21 - Unit Isolators
A = Isopads
B = Spring Isolators
0 = None
Digit 22 - Unit Finish
1 = Paint - Executive Beige
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
6 SCXG-SVX01B-EN
General
Installation
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 Cap. (4-row)
B = Mechanical Clean Low Cap. (2-row)
C = Chemical Clean Full Cap. (4-row)
D = Chemical Clean Low Cap. (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
Digit 28 - Ventilation Control
B = Airside Econ w/ Traq
(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 Inlet)
F = Airside Econ w/ Std Dampers and
Comparative Enthalpy (Top O/A
Inlet)
G = Traq Damper Ventilation Interface
™
Damper
Self-Contained Ship-With Accessory Model Number Description
P S W G S A 1 1 0 AO
1 2 3 4 5 6 7 8 9 10 11
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 = BAYSENS017 - Zone Temp Only (C V
and VAV)
B = BAYSENS013 - Zone Temp with
Timed Override Button (CV and VAV)
H = Ventilation For 2 Pos. Cntrl Interface
0 = None
Digit 29 - Water Piping
A = Right Hand Condenser Connection
B = Left Hand Condenser Connection
C = Right Hand Basic Piping
D = Left Hand Basic Piping
E = Right Hand Intermediate Piping
F = Left Hand Intermediate Piping
J = Right Hand Basic w/ Flow Switch
K = Left Hand Basic w/ Flow Switch
L = Right Hand Intermediate
w/ Flow Switch
M = Left Hand 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
3 = Dirty Filter Switch
4 = 1 and 2
5 = 1 and 3
6 = 2 and 3
7 = 1, 2, and 3
0 = None
C = BAYSENS014 - Zone Temp with
Timed Override Button, Setpoint Dial
(CV and VAV)
D = BAYSENS023 - Remote Min. Position
Potentiometer Control (OA Damper)
E = BAYSENS008 - CV Zone Sensor
F = BAYSENS010 - CV Zone Sensor with
Indicator Lights
G = BAYSENS019 - CV Programmable
Night Setback Sensor
H = BAYSENS021 - VAV Zone Sensor
with Indicator Lights
J = BAYSENS020 - VAV Programmable
Night Setback Sensor
K = Remote Sensor Kit
L = Outside Air Temperature Sensor Kit
M = Outside Air Humidity Sensor Kit
N = BAYSTAT010 - 2 Heat/2 Cool
Thermostat
Information
Digit 33 - Control Interface Options
A = Generic BAS Module (GBAS)
B = Ventilation Override Module (VOM)
C = Tracer Comm. Interface Module (TCI)
D= Remote Human Interface (RHI)
E= GBAS and TCI
F= VOM and TCI
G = GBAS and VOM
H = GBAS and RHI
J = VOM and RHI
K = TCI and RHI
L = GBAS, VOM, and TCI
M = GBAS, VOM, and RHI
N = GBAS, TCI, and RHI
P = VOM, TCI, and RHI
R = GBAS, VOM, TCI, and RHI
0 = None
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
P = BAYSTAT037A - 2 Heat/2 Cool
Programmable Thermostat
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
Digit 10, 11 - Design Sequence
A0 = A Design
SCXG-SVX01B-EN 7
General
Installation
Information
“After-Shipment” Accessory Model Number
S C W F N 20 4 2 AO A B 2 10 065 B A 1 0 1 0 A A C F A 1 1 0 T 2 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Digit 1 - Parts/Accessories
P = Parts/Accessories
Digit 2 - Unit Model
S= Self-Contained
Digit 3 - Shipment
A = After Unit
Digit 4 - Development Sequence
F = Signature Series
G = Modular Series
Digit 5 - Condenser Medium
W = Water Cooled
R = Remote Air Cooled
Digit 6 - Refrigerant Circuit Configuration
N = Independent (Water-Cooled)
M = Manifolded (Air-Cooled)
Digits 7, 8 - Unit Nominal Capacity
20 = 20 Tons (Water or Air)
22 = 22 Tons (Water Only)
25 = 25 Tons (Water or Air)
29 = 29 Tons (Water or Air)
30 = 30 Tons (Air Only)
32 = 32 Tons (Water Only)
35 = 35 Tons (Water or Air)
38 = 38 Tons (Water Only)
40 = 40 Tons (Air Only)
42 = 42 Tons (Water Only)
46 = 46 Tons (Water Only)
50 = 50 Tons (Air Only)
52 = 52 Tons (Water Only)
58 = 58 Tons (Water Only)
60 = 60 Tons (Air Only)
65 = 65 Tons (Water Only)
72 = 72 Tons (Water Only)
80 = 80 Tons (Water Only)
Digit 9 - Unit Voltage
6 = 200 Volt/60 Hz/3 ph
4 = 460 Volt/60 Hz/3 ph
5 = 575 Volt/60 Hz/3 ph
0 = Not Defined
Digits 10, 11 - Design Sequence
A0 = A Design
Digit 12 - Unit Power Connection
1 = Single Point Power
2 = Dual Point Power
0 = Not Defined
Digit 13, 14 - Motor HP
05 = 5 HP Motor
07 = 7.5 HP Motor
8 SCXG-SVX01B-EN
10 = 10 HP Motor
15 = 15 HP Motor
20 = 20 HP Motor
25 = 25 HP Motor
30 = 30 HP Motor
40 = 40 HP Motor
50 = 50 HP Motor (460V & 575V Only)
0 = Not Defined
Digit 15 - Exhaust/Comparative Enthalpy
Module (Field Installed)
1 = ECEM Kit
2 = None
Digit 16 - Generic BAS Module
1 = GBAS 0-5 VDC Kit
0 = None
Digit 17 - Heat Module
1 = Electric Heat Module Kit
2 = Hydronic Heat Module Kit
0 = None
Digit 18 - Remote Human Interface and
IPCB
1 = Remote Human Interface Panel Kit
(RHI Only)
2 = Interprocessor Communications
Module Kit (IPCB Only)
3 = RHI and IPCB Kit
0 = None
Digit 19 - Tracer Communications
Interface Kit (TCI)
1 = TCI Comm 3 Kit
0 = None
Digit 20 - Ventilation Override Module Kit
(VOM)
1 = VOM Kit
0 = None
Digit 21 - Sensors and Thermostats
A = BAYSENS017 - Zone Temp Only (CV
and VAV)
B = BAYSENS013 - Zone Temp with
Timed Override Button (CV and VAV)
C = BAYSENS014 - Zone Temp with
Timed Override Button, Setpoint Dial
(CV and VAV)
E = BAYSENS008 - CV Zone Sensor
F = BAYSENS010 - CV Zone Sensor with
Indicator Lights
G = BAYSENS019 - CV Programmable
Night Setback Sensor
H = BAYSENS021 - VAV Zone Sensor
with Indicator Lights
J = BAYSENS020 - VAV Programmable
Night Setback Sensor
K = Remote Sensor Kit
L = Outside Air Temperature Sensor Kit
M = Outside Air Humidity Sensor Kit
0 = None
Digit 22 - Low Entering Air Temperature
Protection Device
1 = Low Entering Air Temperature
Protection Device Kit
0 = None
Digit 23 - High Duct Temperature
Thermostat
1 = High Duct Temp. Thermostat Kit
0 = None
Digit 24 - Plenum High Static Switch
1 = Plenum High Static Switch Kit
0 = None
Digits 25 — 45 - Future Use
0 = None
Pre-Installation
Receiving and Handling
Shipping Package
Commercial self-contained units ship
assembled on skids with protective
coverings over the coil and discharge
openings. Figure I-PC-1 illustrates a
typical shipping package.
Ship-Separate Accessories
Field-installed sensors ship separately
inside the unit’s main control panel. Extra
filters, sheaves, and belts ship in the unit’s
fan motor section. Condenser plugs,
spring isolators, and isopads ship in the
unit’s bottom left side.
Receiving Checklist
Complete the following checklist
immediately after receiving unit
shipment to detect possible shipping
damage.
oo
Inspect individual cartons before
accepting. Check for rattles, bent carton
corners, or other visible indications of
shipping damage.
Installation
o 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
o
shipment if it appears damaged. Retain
all internal packing, cartons, and crate.
Take photos of damaged material if
possible.
Considerations
o 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 your Trane representative of
o
the damage and arrange for repair.
Have the carrier inspect the damage
before making any repairs to the unit.
o
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
o
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.
Figure I-PC-1. Typical unit mounted on shipping skid.
SCXG-SVX01B-EN 9
Pre-Installation
Installation
Installation Preparation
Before installing the unit, perform
the following procedures to
ensure proper unit operation.
1. Verify the floor or foundation is level.
Shim or repair as necessary. To ensure
proper unit operation, install the unit
level (zero tolerance) in both horizontal
axis. Failure to level the unit properly
can result in condensate management
problems, such as standing water
inside the unit. Standing water and wet
surfaces inside units can result in
microbial growth (mold) in the drain
pan that may cause unpleasant odors
and serious health-related indoor air
quality problem.
2. Allow minimum recommended
clearances for maintenance and
routine service. See “Service Access”
section on page 11.
3. Position the unit and skid assembly in
its final location. If unit shipped splitapart, follow the procedure in the
“Split-Apart Unit Assembly” section
on page 14 before completing this
step. Test lift the unit to determine
exact unit balance and stability before
hoisting it to the installation location.
See Figure I-PC-7 and I-PC-8 on page
13 for typical rigging procedures,
including cautions and proper uses of
such equipment as fork lifts, spreader
bars, and hooks.
Considerations
5. Remove the protective shipping covers
from the unit. Refer to the “Unit
Protective Covers” section on page 39.
Note: Unit height and connection locations
will change if external vibration isolators
are used. The unit may be raised an
additional 5
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. Electrical supply power must meet
specific balance and voltage
requirements, as described in the
“Electrical Requirements” section on
page 37.
7. Water-cooled units only (model
SXWG): 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 the “Water
Piping” section on page 34 for general
waterside recommendations.
8. Air-cooled units only (model SXRG):
These units require field-installation of a
remote air-cooled condenser and
refrigerant piping. See the “Refrigerant
Piping” section on page 36 for general
piping recommendations.
7
/8 inches with spring-type
4. Remove the skids from under the unit.
See the “Rigging and Handling”
section on page 12. Refer to the “Skid
Removal” section on page 16. If you
find internal damage, file a claim
immediately to the delivering carrier.
10 SCXG-SVX01B-EN
Pre-Installation
Installation
Service Access
See Figure I-PC-4 and Table I-PC-1 for
recommended service and code
clearances. Access to thermostat unit
controls is through a hinged access panel
door on the front, lower left of the unit’s
compressor section.
IntelliPak
panel on the middle right of the fan
section. The panel is secured with an
automatic latch and quick-acting fasteners, which require a screwdriver to open.
Removable front unit panels provide
access to compressors, fan, motor, inlet
guide-vane actuator, and belts.
Removable left side panels give access to
drive side, fan bearing, inlet guide-vanes,
condensers, and waterside economizer
control valve. The compressor, con-
®
unit control access is through a
Considerations
denser and fan motor access panels are
secured with quick-acting fasteners.
Access panels for evaporator coils,
expansion and water valves, and left fan
bearing are sheet metal screws. Access
to other components for service requires
removal of panels secured with sheet
metal screws. During operation, sight
glasses are viewable through portholes
on the upper right side panel of the fan
section.
WARNING
!
Disconnect electrical power
source before servicing the unit.
Failure to do so may result in
injury or death from electrical
shock or entanglement in moving
parts.
Table I-PC-1. SCWG/SIWG/SCRG/SIRG Clearance Requirements
Side Distance Purpose
Front 42 in. (1066 mm) NEC code requirement
Left 18 in. Air-cooled units only
Right 36 in. (914 mm) Provides uniform airflow
Inlet 18 in. (457 mm) Provides uniform airflow
See Table
36 in. (914 mm) Refrigeration and waterside component service
77 in. Fan shaft removal
Air Inlet
42” (1066.8 mm)
Minimum
18” (457.2 mm)
Minimum
36” (914 mm)
Minimum
Figure I-PC-4. Top view of self-contained unit showing recommended service and code
clearances.
SCXG-SVX01B-EN 11
Pre-Installation
Rigging and Unit Handling
Before lifting the unit or modular
component, determine the approximate
center of gravity for lifting safety. See
Figure I-PC-5 for assembled modular
units and Figure I -PC-6 for split-apart
units. The center of gravity may vary
slightly within the gravity block
depending on unit options.
WARNING
!
Ensure lifting equipment capacity
exceeds unit weight by an
adequate safety factor to prevent
injury, death, or unit damage.
Always test-lift the unit to determine the
exact unit balance and stability before
hoisting it to the installation location. See
Figures I-PC-7 and I-PC-8 for typical
rigging procedures and proper rigging
equipment usage.
Installation
Figure I-PC-5. Assembled unit gravity block location.
Considerations
WARNING
!
To prevent injury or death and
unit damage, always test-lift the
unit to determine actual center of
gravity.
PC-6.
See Figures I-PC-5 and I-
Table I-PC-2. Gravity Block Dimensions
Model A B C D
SXWG 36 14 3 8 12
SXRG 36 16 4 0 12
Fan Section Only
Compressor Section Only
Figure I-PC-6. Split-apart unit gravity block location.
12 SCXG-SVX01B-EN
Pre-Installation
Rigging and Handling
Unit Shipping
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.
CAUTION
!
Do not use hooks to lift unit or
hook into open channels to lift
unit. This could cause unit
damage.
Installation
Figure I-PC-7. Assembled modular unit proper rigging.
Considerations
Fan Section
Figure I-PC-8. Split-apart modular unit proper rigging.
SCXG-SVX01B-EN 13
Pre-Installation
Installation
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 the sheet metal shipping cover on
compressor section. Retain brackets
and screws.
3. Remove shipping cover from the
compressor section and verify the shipwith packge contains:
• suction and discharge line couplings
• insulation
• sheet metal screws
4. Lift fan section onto the compressor
section using the rigging method in
Figure I-PC-8 on page 13.
5. Remove skid from the fan section,
placing the fan section onto the
compressor section. Reference Figure IPC-9 on page 15.
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 I-PC-9.
7. Remove the unit panels labeled RU and
RL in Figure I-PC-10 on page 15. To
remove panels, first remove the four
shipping screws located in the corner of
each panel. Next, turn the remaining
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
I-PC-9 on page 15.
8. Connect the drain hose to the drainpan
outlet fitting and secure it with the drain
hose clamp provided.
9. Circulate nitrogen thoughout
refrigerant circuits.
10. Unbraze and remove the caps on the
discharge and suction lines in both the
compressor and fan sections.
11. Install and braze discharge and suction
line couplings.
12. Insulate discharge and suction lines
with the insulation provided.
1
/
Considerations
13. 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
14. Remove panels FML, FMM, and FMR.
15. 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.
16. Using the CPC wiring diagram,
connect the male CPC to the female
CPC in the top control panel.
17. If the unit has the mixed air
temperature option, route the capillary
tube on back of the filter rack.
Units with Thermostat Only
18. Remove panel FMR. See Note 1 on
Figure I-PC-10.
4
19. Pull frost protection wires from the
bottom control panel throughknockouts
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:
20. 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.
14 SCXG-SVX01B-EN
Pre-Installation
Installation
Considerations
Figure I-PC-9 How to assemble the split apart modular unit.
Figure I-PC-10 Modular unit panel description and internal connections.
SCXG-SVX01B-EN 15
Pre-Installation
Installation
Considerations
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 I-PC-5 and I-PC-6 on page 12
for unit gravity block location. Slide the
skids out and lower the unit at the
installation location.
Note: External isolation is not necessary
since units are internally isolated. Consult a
vibration specialist before “doubleisolating” the unit.
External Unit Isolation
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 factoryprovided isolator sheet.
Set the spring-type isolators (Figure I-PC-
9) 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: The
Trane Company 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 I-PC-9.
To install external isolators, complete the
following procedure.
1. Locate the isolators under unit base at
the locations indicated on the factoryprovided 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 I-PC-9, must be
inches. To increase the clearance, lift
16 SCXG-SVX01B-EN
1
/4 - 1/
2
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
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.
Pre-Installation Checklist
Complete the following checklist before
beginning unit installation.
Verify the unit size and tagging with the
o
unit nameplate.
Make certain the floor or foundation is
o
level, solid, and sufficient to support the
unit and accessory weights. See Table
I-DW-1 on page 32. Level or repair the
floor before positioning the unit if
necessary.
o
Allow minimum recommended
clearances for routine maintenance and
service. Refer to unit submittals for
dimensions.
o Allow three fan diameters above the
unit for the discharge ductwork. Return
air enters the rear of the unit and
Figure I-PC-9. Optional spring isolator dimensional data.
conditioned supply air discharges
through the top.
Electrical connection knockouts are on
o
1
/
4
the top, left side of the unit.
o
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
spring type isolators.
o Electrical supply power must meet
specific balance and voltage
requirements as described in the
“Electrical Requirements” section on
page 37.
Water-cooled units only: The installer
o
is responsible for providing a condenser
main, standby water pump, cooling
tower, pressure gauges, strainers, and
all components for waterside piping.
See the “Water Piping” section on page
34 for general waterside
recommendations.
o Air-cooled units only: The installer is
responsible for providing and installing
the remote air-cooled condenser and
refrigerant piping, including filter driers.
7
/8” with
Dimensions
SCWG/SIWG Unit —
English - (inches)
ON PAGE 21
Installation
ON PAGE 21
and Weights
ON PAGE 20
ON PAGE 21
ON PAGE 21
SCXG-SVX01B-EN 17
Dimensions
SCWG/SIWG Unit —
Metric- (mm)
ON PAGE 21
Installation
ON PAGE 21
and Weights
ON PAGE 21
ON PAGE 21
ON PAGE 21
18 SCXG-SVX01B-EN
Dimensions
SCRG/SIRG Unit —
English - (inches)
ON PAGE 21
Installation
ON PAGE 21
and Weights
ON PAGE 21
SCXG-SVX01B-EN 19
SCRG/SIRG Unit —
Metric - (mm)
Dimensions
and WeightsInstallation
ON PAGE 21
ON PAGE 21
ON PAGE 21
20 SCXG-SVX01B-EN
Dimensions
and WeightsInstallation
SCRG/SIRG/SCWG/SIWG Detail
“A” Electrical Connections —
English - (inches)
SCRG/SIRG/SCWG/SIWG Detail
“A” Electrical Connections —
Metric - (mm)
Detail “B” Discharge Options — English - (inches) and Metric (mm)
Unit Dimensions - English, (inches)
Unit Tons A B C D E F
SCWG/SCRG 20 20 10 3/458 1/25 1/813 1/411 1/
SCWG/SCRG 25 19 1/412 1/457 5/85 1/813 1/411 1/
SCWG 30 - 35/SCRG 32 18 14 5/856 1/25 1/813 1/411 1/
2
2
2
Unit Dimensions - Metric (mm)
Unit Tons A B C D E F
SCWG/SCRG 20 508 508 1486 130 337 292
SCWG/SCRG 25 489 489 1464 130 337 292
SCWG 30 - 35/SCRG 32 457 457 1435 130 337 292
SCXG-SVX01B-EN 21
Hot Water Coil
Dimensions
and WeightsInstallation
Hot Water Coil Dimensions - English - (inches)
Unit Ton A B C D E F G H J
20 - 35 37 1/453 3/416 5/873 1/214 7/816 1/443 1/45 5/873/
Hot Water Coil Dimensions - Metric (mm)
Unit Ton A B C D E F G H J
20 - 35 946 1365 422 1867 378 413 1099 143 187
22 SCXG-SVX01B-EN
4
Dimensions
Steam Coil
Installation
and Weights
Steam Coil Dimensions - English - (inches)
Unit Ton A B C D E K L M N P Q R
20 - 35 37 1/453 3/416 5/873 1/210 7/822 1/23 3/815 7/81419 3/84
Steam Coil Dimensions - Metric (mm)
Unit Ton A B C D E K L M N P Q R
20 - 35 946 1365 422 1867 276 572 86 403 25 1041 238 111
SCXG-SVX01B-EN 23
3
/
8
Dimensions
Electric Heat Coil
Installation
and Weights
24 SCXG-SVX01B-EN
Dimensions
Waterside Economizer
Installation
and Weights
SCXG-SVX01B-EN 25
Dimensions
Installation
and Weights
Airside Economizer Dimensions - English - (inches)
Unit Size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M
SCWG/SIWG 20, 25 36 65 5/837 74 1/46 1/856 1/249 3/423 1/420 1/25 5/87 20 1/217 1/817 49 3/
SCRG/SIRG 20
SCWG/SIWG 30, 35 36 65 5/837 74 1/46 1/861 3/862 3/428 1/820 1/23 1/47 20 1/217 1/85 1/262 3/
SCRG/SIRG 25, 32
Airside Economizer Dimensions - Metric (mm)
Unit Size A B C D E F (1) F (2) G (1) G (2) H (1) H (2) J K L M
SCWG/SIWG 20, 25 914 1667 940 1886 156 1435 1264 591 521 143 178 521 435 305 1264
SCRG/SIRG 20
SCWG/SIWG 30, 35 914 1667 940 1886 156 1559 1594 714 521 83 178 521 435 140 1594
SCRG/SIRG 25, 32
26 SCXG-SVX01B-EN
4
4
Detail “A”
Dimensions
and Weights
Detail “B”
(Factory
provided
for field
installation)
SCXG-SVX01B-EN 27
Dimensions
Variable Frequency Drive
Installation
and Weights
Variable Frequency Drive Dimensions - English - (inches)
Motor HP Voltage A B C D E F G H J K Weight
7.5 200V 9
7.5 460V 6 7/
10 200V 9
10 460V 9
15 200V 9 5/
15 460V 9
20 200V 9 5/
20 460V 9
25 200V 14 1 12 1 263/824 3/
25 460V 9 5/
1
/
2
3
/
8
8
1
/
2
1
/
2
3
/
8
4
1
/
2
3
/
8
4
1
/
2
3
/
8
4
1
8
/212 3/
3
6 1/
/811 1/
8
1
8
/212 3/
1
8
/212 3/
3
8 1/
/4223/821 1/
8
1
8
/212 3/
3
8 1/
/4223/821 1/
8
1
8
/216 3/
3
8 1/
/4223/821 1/
8
1
4
3
4
1
4
1
4
1
4
1
8
/412 1/
/810 1/
/412 1/
/412 1/
/412 1/
/415 7/
1
/48 1/
4
3
/87 1/
2
1
/48 1/
4
1
/48 1/
4
3
/811 1/
4
1
/48 1/
4
3
/811 1/
4
1
/48 1/
8
7
/812 1/
4
3
/811 1/
4
1
/426 lbs.
4
1
/415 lbs.
4
1
/426 lbs.
4
1
/426 lbs.
4
1
/475 lbs.
4
1
/426 lbs.
4
1
/475 lbs.
4
1
/431 lbs.
4
3
/8126 lbs.
8
1
/475 lbs.
4
Variable Frequency Drive Dimensions - Metric (mm)
Motor HP Voltage A B C D E F G H J K Weight
7.5 200V 229 13 203 13 324 6 311 6 210 6 12 kg.
7.5 460V 175 10 156 10 286 10 267 10 184 6 7 kg.
10 200V 229 13 203 13 324 6 311 6 210 6 12 kg.
10 460V 229 13 203 13 324 6 311 6 210 6 12 kg.
15 200V 244 19 206 19 559 10 540 10 286 6 34 kg.
15 460V 229 13 203 13 324 6 311 6 210 6 12 kg.
20 200V 244 19 206 19 559 10 540 10 286 6 34 kg.
20 460V 229 13 203 13 416 6 403 6 210 6 14 kg.
25 200V 356 25 305 25 660 10 629 22 308 10 57 kg.
25 460V 244 19 206 19 559 10 540 10 10 286 34 kg.
28 SCXG-SVX01B-EN
Variable Frequency
Drive with Bypass
Dimensions
and WeightsInstallation
SCXG-SVX01B-EN 29
Dimensions
and WeightsInstallation
Variable Frequency Drive With Bypass Dimensions - English - (inches)
Motor HP Voltage A B C D E F G H J K L M Weight
7.5 200V 19 1/217 1/21 7/841 39 3/
7.5 460V 14 1/212 1/41 7/835 33 3/413 1/212 3 1/432 1
10 200V 19 1/217 1/21 7/841 39 3/
10 460V 19 1/217 1/21 7/841 39 3/
15 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs.
15 460V 19 1/217 1/21 7/841 39 3/
20 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs.
20 460V 19 1/217 1/21 7/841 39 3/
25 200V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs.
25 460V 20 18 1 7/849 47 7/816 3/814 7/86 46 3/8-- 20 1/2-- 180 lbs.
Variable Frequency Drive With Bypass Dimensions - Metric (mm)
Motor HP Voltage A B C D E F G H J K L M Weight
7.5 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.
7.5 460V 362 311 48 889 857 343 305 83 813 38 375 60 40 kg.
10 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.
10 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.
15 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg.
15 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.
20 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg.
20 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg.
25 200V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg.
25 460V 508 457 48 1244 1216 416 378 152 1178 -- 521 -- 82 kg.
13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.
4
13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.
4
13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.
4
13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.
4
13 1/212 3 1/438 1 1/420 1/22 3/8126 lbs.
4
1
/414 3/42 3/887 lbs.
30 SCXG-SVX01B-EN
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