Trane IntelliPak Signature Series User manual

SCXF-SVX01B-EN
Installation, Owner, and
Diagnostic Manual
IntelliPak®
Commercial Self-Contained
Signature Series, 20-80 Ton
Models
“BO” and later Design Sequence
SCWF -020, -022, -025, -029, -032, -035, -038, -042, -046, -052, -058, -065, -072, -080
SIWF -020, -022, -025, -029, -032, -035, -038, -042, -046, -052, -058, -065, -072, -080
SCRF -020, -025, -029, -030, -035, -040, -050, -060
SIRF -020, -025, -029, -030, -035, -040, -050, -060
May 2000

©American Standard Inc. 2000 SCXF-SVX01B-EN
General
Information
About This Manual
Literature Change History
Use this manual for commercial self-
contained models SCWF, SIWF, SCRF, and
SIRF.This is the first revision 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 change from
Square D Altivar 66 to Altivar 58. For
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:
Disconnect electrical power
source before servicing unit to
prevent injury or death from
electrical shock.
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
ECEM = Exhaust/comparative enthalpy


 CAUTION
!
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/diagnosticmanual
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
RTM = Rooftop module
S/A = Supply air
SCM = Single circuit module
SZ = Single-zone (unit airflow)
TCI =Tracer®communications module
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
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.
TheTrane Company urges all HVAC
service personnel to make every effort to
prevent any refrigerant emissions while
installing, operating, or servicing equip-
ment. Always conserve refrigerants for
continued use.
WARNING
!

SCXF-SVX01B-EN 3
Contents
Cross reference to related publications/information:
IntelliPak®Self-Contained Programming Guide, PKG-SVP01B-EN
Remote Air-Cool-Condenser Installation, Owner, and Diagnostic Manual, CXRC-
SVX01A-EN
For units with a VFD: Instruction Bulletin Altivar 58 Adjustable Speed Drive Controllers
Installation Guide,Type H Controllers Keypad Display
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
4
4
9
13
22
95
57
96
95
81
74
60
60
47
28
26

4SCXF-SVX01B-EN
Figure I-GI-1. IntelliPak
®
commercial self-contained Signature Series unit components.
Installation
Signature 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.
See Figures I-GI-1 and I-GI-2 for typical
unit components.
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
mechanically 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. Standard or premium efficiency
motor options are available as TEFC or
open drip proof type.
All water-cooled units ship with a full
refrigerant and oil charge. Air-cooled
units ship with oil and a dry nitrogen
holding charge. Therefore, air-cooled
units require field-piping refrigerant
2-inch flat filter
box inside unit
casing
Waterside economizer
(cleanable option shown) Sight glasses with
ports for viewing
while unit is running
Hinged and removable control
panel door for easy access
Unit mounted microprocessor
control with easy-to-read human
interface panel
Energy saving single fan
with inlet guide vanes or
variable frequency drive
Internally trapped
condensate drain for
low cost installation
Waterside valve
package option to
enhance system
efficiency Two-bolt connection on cleanable
condenser for quick, easy
maintenance
Trane 3-D®Scroll Compressor
for reliability, efficiency and
quiet operation
General
Information
connections to the air cooled condensing
unit.
Air-cooled units have two refrigerant
circuits. Water-cooled 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.

SCXF-SVX01B-EN 5
Installation
Standard Controls
Standard controls supplied with the unit
include the human interface (HI) panel
with unit control module (UCM). All set-up
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
IntelliPak®Self-Contained Program-
ming Guide, PKG-SVP01B-EN
. A copy
ships with each unit.
Unit Control Module
The UCM provides “smart”unit control
with safety features and control relays
for pumps, dampers, etc. The Signature
Series IntelliPak®self-contained unit is
controlled by a microelectronic control
system that consists of a network of
modules. These modules are referred to
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 compo-
nents. 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
Figure I-GI- 2 . Right side view of unit.
General
Information
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.
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.

6SCXF-SVX01B-EN
Installation
Sample Unit Model Number:
S C W F 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
Model Number Description
Each IntelliPak®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.
Digit 1 - Unit Model
S = Self Contained
Digit 2 - UnitType
C = Commercial
I = Industrial
Digit 3 - Condenser Medium
W = Water-Cooled
R = Air-Cooled
Digit 4 - Development Sequence
F = F
Digit 5 - Refrigerant Circuit Configuration
N = Independent (Water-Cooled)
M = Manifolded (Air-Cooled)
Digit 6, 7 - Unit Nominal Capacity
20 = 20Tons (Water or Air)
22 = 22Tons (Water Only)
25 = 25Tons (Water or Air)
29 = 29Tons (Water or Air)
30 = 30Tons (Air Only)
32 = 32Tons (Water Only)
35 = 35Tons (Water or Air)
38 = 38Tons (Water Only)
40 = 40Tons (Air Only)
42 = 42Tons (Water Only)
46 = 46Tons (Water Only)
50 = 50Tons (Air Only)
52 = 52Tons (Water Only)
58 = 58Tons (Water Only)
60 = 60Tons (Air Only)
65 = 65Tons (Water Only)
72 = 72Tons (Water Only)
80 = 80Tons (Water Only)
Digit 8 - UnitVoltage
6 = 200Volt/60 Hz/3 ph
4 = 460Volt/60 Hz/3 ph
5 = 575Volt/60 Hz/3 ph
Digit 9 - AirVolume/Temp Control
1 = IGV and Supply AirTemp Ctrl
2 =Variable Frequency Drive and Supply
AirTemp Ctrl
3 = Variable Frequency Drive w/ Bypass
and Supply AirTemp Ctrl
4 = w/oVol. CTRL, w/ ZoneTemp Cool
5 = w/oVol. CTRL, w/ ZoneTemp Heat/Cool
6 = w/oVol. CTRL, w/ Supply AirTemp Ctrl
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
Digit 13 - Flexible Horizontal Discharge
PlenumType
B = Std (33”) Plenum w/Factory Cut Holes
C = Low Plenum (24”) w/Factory Cut
Holes
E = Std Plenum w/ Field Cut Holes
F = Low Plenum w/ Field Cut Holes
H = Std Plenum Double wall w/ Field Cut
Holes
J = Low Plenum Double wall w/ Field Cut
Holes
K = 45”Plenum w/Factory Cut Holes,
Ship Separate
L = Std Plenum w/Factory Cut Holes, Ship
Separate
M = Low Plenum w/Factory Cut Holes,
Ship Separate
N = 45”Plenum w/Field Cut Holes, Ship
Separate
P = Std Plenum w/Field Cut Holes, Ship
Separate
R = Low Plenum w/Field Cut Holes, Ship
Separate
T = 45”Double Wall Plenum w/Field Cut
Holes, Ship Separate
U = Std Double Wall Plenum w/Field Cut
Holes, Ship Separate
V = Low Double Wall Plenum w/Field
Cut Holes, Ship Separate
0 = None
Digit 14 - MotorType
1 = Std Eff. ODP Motor
2 = High Eff. ODP Motor
3 =Totally Enclosed Motor
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
30 = 30 HP Motor
40 = 40 HP Motor
50 = 50 HP Motor, 460V & 575V ODP Only
Digit 17, 18, 19 - Fan RPM
040 = 400 rpm
045 = 450 rpm
050 = 500 rpm
055 = 550 rpm
060 = 600 rpm
065 = 650 rpm
070 = 700 rpm
075 = 750 rpm
080 = 800 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
Digit 20 - HeatingType
A = Steam Coil
B = Hot Water Coil
C = Electric Heat (1 Stage)
F = Hydronic Heat Ctrl Interface
G = Elec. Heat Ctrl Interface (1 stage)
K = Steam Coil Ship Separate
L = Hot Water Coil Ship Separate
0 = Without Heat
Digit 21 - Unit Isolators
A = Isopads
B = Spring Isolators
0 = None
Digit 22 - Unit Finish
1 = Paint - Executive Beige
General
Information

SCXF-SVX01B-EN 7
2 = Protective Coating
3 = Protective Coating w/ Finish Coat
Digit 23 - Future Use
0 = None
Digit 24 - Unit Connection
1 = Disconnect Switch
2 =Terminal Block
3 = Dual Point Power (2 Blocks)
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)
0 = None
Digit 28 -Ventilation Control
B = Airside Econ w/Traq™Damper
(Top O/A)
C = Airside Econ w/ Standard
Damper (Top O/A)
E = Airside Econ w/Traq™Damper and
Comparative Enthalpy (Top O/A)
F = Airside Econ w/ Standard Damper
and Comparative Enthalpy (Top O/A)
H = 2-Position DamperVentilation
Interface
J = Airside Economizer Interface
K = Airside Economizer Interface w/
Comparative Enthalpy
Digit 29 - Water Piping
D = Left Hand Basic Piping
F = Left Hand Intermediate Piping
K = Left Hand Basic w/ Flow Switch
M = Left Hand Intermediate w/ Flow
Switch
0 = None
Digit 30 - CondenserTube Type
A = Standard CondenserTubes
B = 90/10 CuNi CondenserTubes
0 = None (Air-cooled Only)
Digit 31 - Compressor ServiceValves
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 (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 = Construction Throwaway
2 = Med Eff. Throwaway
Digit 36 - Miscellaneous Control Option
A = Low Entering AirTemp. Protect
Device (LEATPD)
B = High DuctTempT-Stat
(Ship Separate)
C = Plenum High Static Switch
(Ship Separate)
E = A and B
F = A and C
H = B and C
L = A, B, and C
0 = None
P S W F S A 11 0AO
1234 5678910 11
Self-Contained Ship-With Accessory Model Number Description
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 (Field Installed)
A = BAYSENS017 - ZoneTemp Only (CV
andVAV)
B = BAYSENS013 - ZoneTemp with
Timed Override Button (CV andVAV)
C = BAYSENS014 - ZoneTemp with
Timed Override Button, Setpoint Dial
(CV andVAV)
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 AirTemperature Sensor Kit
M = Outside Air Humidity Sensor Kit
0 = None
Digit 7 - Low Entering Air Temperature
Protection Device (Field Installed)
1 = Low Entering AirTemperature
Protection Device
0 = None
Digit 8 - Carbon Dioxide Sensor (fieldin-
stalled)
1 = Carbon Dioxide Sensor Kit
0 = None
Digit 9 - Not Used
0 = None
Digit 10, 11 - Design Sequence
A0 = A Design
Installation General
Information

8SCXF-SVX01B-EN
Installation
“After-Shipment”Accessory Model Number
P S A F W N 20 4 AO 1 05 10 0 0 0 0 0 0 0 0
1 2 3 4 5 6 7 8 9 10 11 12 1314 15 16 17 18 19 20 21 22 23 24
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 = 20Tons (Water or Air)
22 = 22Tons (Water Only)
25 = 25Tons (Water or Air)
29 = 29Tons (Water or Air)
30 = 30Tons (Air Only)
32 = 32Tons (Water Only)
35 = 35Tons (Water or Air)
38 = 38Tons (Water Only)
40 = 40Tons (Air Only)
42 = 42Tons (Water Only)
46 = 46Tons (Water Only)
50 = 50Tons (Air Only)
52 = 52Tons (Water Only)
58 = 58Tons (Water Only)
60 = 60Tons (Air Only)
65 = 65Tons (Water Only)
72 = 72Tons (Water Only)
80 = 80Tons (Water Only)
Digit 9 - UnitVoltage
6 = 200Volt/60 Hz/3 ph
4 = 460Volt/60 Hz/3 ph
5 = 575Volt/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
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 - ZoneTemp Only (CV
andVAV)
B = BAYSENS013 - ZoneTemp with
Timed Override Button (CV andVAV)
C = BAYSENS014 - ZoneTemp with
Timed Override Button, Setpoint Dial
(CV andVAV)
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 AirTemperature Sensor Kit
M = Outside Air Humidity Sensor Kit
0 = None
Digit 22 - Low Entering Air Temperature
Protection Device
1 = Low Entering AirTemperature
Protection Device Kit
0 = None
Digit 23 - High Duct Temperature
Thermostat
1 = High DuctTemp.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
General
Information

SCXF-SVX01B-EN 9
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.
oIf 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.
oInspect 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.
oDo 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.
oDo not continue unpacking the
shipment if it appears damaged. Retain
all internal packing, cartons, and crate.
Take photos of damaged material if
possible.
oNotify the carrier’s terminal of the
damage immediately by phone and
mail. Request an immediate joint
Figure I-PC-1. Typical unit mounted on shipping skid.
inspection of the damage by the carrier
and consignee.
oNotify yourTrane representative of
the damage and arrange for repair.
Have the carrier inspect the damage
before making any repairs to the unit.
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
axes. 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 adequate service and code
clearances as recommended in
“Service Access”section on page 10.
Position the unit and skid assembly in its
final location.Test lift the unit to
determine exact unit balance and
stability before hoisting it to the
installation location. See Figure I-PC-3
on page 11 for typical rigging
procedures, including cautions and
proper uses of such equipment as fork
lifts, spreader bars, and hooks.
3. Remove the skids from under the unit.
See Figure I-PC-1. Refer to the “Skid
Removal”section on page 12. If you
find internal damage, file a claim
immediately to the delivering carrier.
4. Remove the protective shipping covers
from the unit. Refer to the “Unit
Protective Covers”section on page 29.
5.Verify the compressor isolator shipping
brackets are removed and the isolators
are properly tightened for operation.
Refer to the “Unit Vibration Isolation”
section on page 29.
Pre-Installation
Considerations

10 SCXF-SVX01B-EN
The compressor, condenser, and fan
motor access panels are secured with
quick acting fasteners. Fast thread
screws secure access panels for
economizer coils, evaporator coils
expansion valves, water valves, and left
fan bearing. Access to other components
requires removal of semipermanent
panels secured with sheet metal screws.
During operation, sight glasses are
viewable through the portholes on the
unit’s left upper panel.
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. Service and Code Clearance Requirements
Side Distance Purpose
Front 42 in. (1066 mm) (20-38Ton) NEC code requirement
48 in. (1219 mm) (42-80Ton) Fan service/removal
Left 36 in. (914 mm) Refrigeration and waterside component service
Right 9 in. (229 mm) Non VFD w/ open return
18 in. (457 mm) Non VFD w/ ducted return
24 in. (610 mm) w/ VFD 7.5 to 20 HP
36 in. (914 mm) w/ VFD 25 to 50 HP
Inlet 18 in. (457 mm) Provides uniform airflow
Service Access
See Figure I-PC-2 for recommended
service and code clearances. Access unit
controls through the front, top left panel.
The panel requires a screwdriver to
remove since it is secured with two quick
acting fasteners and an automatic latch.
Removable unit panels on the right-hand
side provide access to compressors, fan,
motor belts, extended grease line fittings,
drive side bearing, and inlet guide vanes.
On the unit’s left side, removable panels
allow access to the expansion valves,
filter driers, refrigerant sight glasses,
liquid line valves, opposite drive fan
bearing, inlet guide vanes, inlet guide
vane actuator, extended grease line
fittings, condensers, and waterside
economizer control valve.


 WARNING
!
Figure I-PC-2. Top view of self-contained unit showing recommended service and code
clearances.
Air
Inlet 18”(457.2mm) Minimum
See
Table
PC-1
Control
Panel 42”(1066.8 mm) (20-38 Ton)
Minimum
48”(1219 mm) (42-80 Ton)
Pre-Installation
Considerations
36”(914.4 mm)
Minimum
Installation
VFD