Trane SCIJ — R-410A Installation and Maintenance Manual
Installation, Operation,
and Maintenance
Integral Air-Cooled
Self-Contained Unit
SCIJ — R-410A
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and airconditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment
by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and
on the tags, stickers, and labels that are attached to the equipment.
January 2014
SXIJ-SVX01B-EN
Warnings, Cautions and Notices
Warnings, Cautions and Notices. Notethat warnings,
cautions and notices appear at appropriate intervals
throughout this manual. Warnings are provided to alert
installing contractors to potentialhazards that could result
in death or personal injury. Cautions are designed to alert
personnel to hazardous situations that could result in
personal injury, while notices indicate a situation that
could result in equipment or property-damage-only
accidents.
Your personal safety and the proper operation of this
machine depend upon the strict observance of these
precautions.
Read this manual thoroughlybefore operatingor servicing
this unit.
ATTENTION: Warnings, Cautions, and Notices appear at
appropriate sections throughout this literature. Read
these carefully:
WARNING
CAUTIONs
NOTICE:
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
Indicates a situation that couldresult 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 handlingof
all refrigerants-including industry replacements for CFCs
such as HCFCs and HFCs.
municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
WARNING
Personal Protective Equipment (PPE)
Required!
Installing/servicing this unit could result in exposure to
electrical, mechanical and chemical hazards.
• Before installing/servicing this unit, technicians
MUST put on all Personal ProtectiveEquipment (PPE)
recommended for the work being undertaken.
ALWAYSreferto appropriate MSDS sheets and OSHA
guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS sheets and
OSHA guidelines for information on allowable
personal exposure levels, proper respiratory
protection and handling recommendations.
• If there is a risk of arc or flash, technicians MUST put
on all Personal Protective Equipment (PPE) in
accordance with NFPA 70E or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit.
Failure to follow recommendations could result in death
or serious injury.
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
© 2014 Trane All rights reserved SXIJ-SVX01B-EN
Introduction
Overview of Manual
This booklet describes proper installation, start-up,
operation, and maintenance procedures for the Integral
Air-Cooled unit, model SCIJ (with Micro-Channel
Condensers). Carefully review the information within this
manual and follow the instructions to minimize the risk of
improper operation and/or component damage.
Note: One copy of the appropriate service literature ships
inside the control panel of each unit.
Note: This document is customer property and must be
retained by the unit's owner for use by
maintenance personnel.
It is important that you perform periodic maintenance to
help ensure trouble free operation. Should equipment
failure occur, contact a qualifiedTrane service
organization for an experienced HVAC technician to
properly diagnose and repair this equipment.
Unit Nameplate
The unit nameplate identifies the unit model number,
appropriate service literature, and wiring diagram
numbers. It is mounted on the control panel door.
Reference this information when making inquires or
ordering parts or literature.
Warnings, Cautions and Notices
Revision Summary
Use this manual for Integral Air-Cooled units, model SCIJ
(with Micro-Channel condensers).
SXIJ-SVX01B-EN (30 Jan 2014)
Removedcoil resistant coating option frommodel number
description.
SXIJ-SVX01B-EN (17 Apr 2012)
Modifications for 2-speed motor.
SXIJ-SVX01A-EN
This manual supersedes SXIH-SVX01C-EN (October
2008).
Trademarks
Trane 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.
SXIJ-SVX01B-EN 3
Table of Contents
Warnings, Cautions and Notices .......... 2
Introduction ........................... 3
Overview of Manual .................. 3
Unit Nameplate ..................... 3
Revision History ..................... 3
Trademarks ......................... 3
Model Number Description ............... 5
General Information ..................... 6
Commonly Used Acronyms ............. 6
Refrigeration Circuits ................... 6
Evaporator Section .................... 6
Controls .............................. 6
Field Installed Accessories .............. 6
Installation .............................. 7
Pre-Installation Considerations .......... 7
Checklist ........................... 7
Receiving and Handling ............... 7
Acoustic Considerations .............. 7
Installation Preparation ............... 8
Dimensions and Weights ............... 8
Mechanical Requirements ............. 11
Electrical Requirements ............... 12
Voltage Imbalance .................. 12
Installation Checklist .................. 14
Fan Discharge Conversion Procedure . . 14
Low Ambient Control Kit Installation . . . 15
Hydronic Coil Installation ............. 15
Plenum Installation ................. 16
Pre-Startup Checklist .................. 17
Unit Startup Procedures ............... 17
Operation .............................. 18
Sequence of Operation .............. 18
Maintenance ........................... 19
Maintenance Procedures .............. 19
Cleaning the Condenser Coils ........ 20
Periodic Checklists .................. 21
Troubleshooting ...................... 22
4 SXIJ-SVX01B-EN
Model Number Description
Digit 1 - Unit Model
S =self contained
Digit 2 - Unit Type
C = commercial
Digit 3 - Condenser Medium
I = integral air-cooled
Digit4-Development Sequence
J = development series
Digit 5, 6, 7- Unit Nominal Capacity
050 = 5 tons
075 = 7.5 tons
100 = 10 tons
150 = 15 tons
Digit 8 - Unit Voltage
3 = 208 - 230 volt/60 hz/3 ph
4 = 460 volt/60 hz/3 ph
5 = 575 volt/60 hz/3 ph
Digit 9 - Air Flow Configuration
1 = horizontal discharge/rear return
2 = vertical discharge/front return
3 = vertical discharge/rear return
Digit 10, 11 - Design Sequence
**= factory assigned
Digit 12 - Air Filter Type
1 = one-inch fiberglass throwaway
Digit 13 - Control
0 = control interface
Digit 14 - Unit Finish
1 = painted
Digit 15 - Coil Finish
0 = none
C = condenser coated
E = evaporator coated
H = condenser + evaporator coated
SXIJ-SVX01B-EN 5
General Information
The integral air-cooled unit, model SCIJ with Micro-
Channel Condenser, is a high efficiency, vertical air cooled
air conditioner. Units have either front or top discharge
configuration options and easy service access. Unit
construction is heavy gage steel with a baked enamel
finish. Available unit voltages are 208/3/60, 230/3/60, and
460/3/60, 575/3/60.
Commonly Used Acronyms
For convenience, a number of acronyms and
abbreviations are used throughout this manual.These
acronyms are alphabetically listed and defined below.
cfm = cubic-feet-per-minute
CKT = circuit
CV = constant volume
CW = clockwise
CCW = counterclockwise
E/A = exhaust air
F/A = fresh air
IOM= installation/operation/maintenance manual
LH = left-hand
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
SZ = single-zone (unit airflow)
VAV = variable air volume
Note: Cross-reference to related publication: Internal Air-
Cooled Self-Contained Product Catalog: PKGPRC019-EN.
fixed diameter blower pulley.The condenser fan section
consists of one, two or three forward curved centrifugal
fans powered by a premium efficiency motor through an
adjustable motor sheave and fixed diameter blower
pulley. Condenser motor belt tension is adjusted by an
adjustable motor mounting base. Control box access is
from the front of the unit to ease electrical hook-up.
Controls
The standard control panel consists of a high voltage
terminal block, overload relays for each fan motor,
transformer, 3-pole 24 volt contactors for each motor and
compressor, and a 5-second delay timer. Remote
thermostat controls are field-installed.
Field Installed Accessories
These items ship separately for field installation:
• steam coil
• hot water coil
• plenum
• low ambient kit
• oversized or s-speed motors
• remote thermostat
Note: Application of the above options and/or
accessories may require field adjustment of fan
speeds to ensure proper airflow and performance.
Refrigeration Circuits
Units are configured in single or double refrigeration
circuits. Each circuit consists of a:
• high efficiency scroll compressor mounted on rubber
isolation grommets
• condenser and evaporator coils, designed for
optimum performance and efficiency with lanced fins
and rifled tubing
• filter-drier
Evaporator Section
The evaporator fan section consists of one, two or three
forward curved centrifugal fans powered by a premium
efficiency motor through an adjustablemotor sheave, and
6 SXIJ-SVX01B-EN
Installation
Pre-Installation Considerations
Checklist
The following checklist gives an overview of the
recommended pre-installation considerations. Follow the
procedures in this section to ensure installation is
complete and adequate for proper unit operation. Verify
this checklist is complete before beginning unit
installation.
• Verifythe unit size and taggingwith the unit nameplate
to ensure the correct unit is received.
• Inspect the unit for possible shipping damage and
make any necessary claims with the freight delivery
company immediately.
• Before installing the unit, remember to allow
minimum recommended clearances for routine
maintenance and service. Refer to unit dimensions and
clearances on submittals or in the
Weights,” p. 8section.
• Verifythe unit is configured properly prior to beginning
unit installation.
• Make proper acoustic considerations before installing
unit. Do not install unit near sound-sensitive locations.
• Allow adequate space for service and operating
clearances. Reference
this page.
• Make provisions for correct supply power and note
electrical connection knockouts locations on the unit
submittals or in the
section.
• Ensure the unit installation location is level.
“ServiceAccess,” p. 7section on
“Dimensions and Weights,” p. 8
Receiving and Handling
Shipping Package
Integral air-cooled units ship assembled on skids. Units
ship in the unitary configuration, assembled, piped, and
charged with refrigerant.
“Dimensions and
• Report concealed damage to the freight line within the
allotted time after delivery.Verify with the carrier their
allotted time to submit a claim.
Note: Failure to follow these procedures may result in no
reimbursement for damages from the freight
company.
• 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 packaging.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.
Unit Storage
Take precautions to prevent condensate from forming
inside the unit's electrical compartments and motors if the
unit is stored before it is installed.
Service Access
Maintain adequate clearances around and above the unit
to ensure proper unit operation and allow sufficient
service access.Trane recommends 36-inches service
access on all sides of the unit.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
Receiving Checklist
Complete the following checklist immediately after
receiving unit shipment to detect possible shipping
damage.
• Verify that the unit nameplate data corresponds to the
sales order and bill of lading (including electrical data).
• Visually inspect the unit exterior for physical signs of
shipping damage or material shortages.
• If a unit appears damaged, inspect it immediately
before accepting the shipment. Remove access panels
and check for interior component damage. Make
specific notations concerning the damage on the
freight bill. Do not refuse delivery.
SXIJ-SVX01B-EN 7
Acoustic Considerations
Before determining the final unit installation site,
remember that proper unit placement is critical in
reducing transmitting sound levels to the building.The
ideal time to make provisions to reduce sound
transmissions is during the design phase.The most
economical means of avoiding a potential acoustical
problem is to place units in areas that are not acoustically
sensitive.
Installation
Unit Location
Install the unit in a dry, indoor area between 50 and 115°F.
Choose a location where sound levels, airflow and
vibration, commonly associated with heavy-duty
commercial equipment, will not be objectionable to
occupants. In multiple unit installations, separate the
individual units and stagger their location from floor to
floor so as not to starve units for air and not to discharge
warm condenser air from one condenser into theintake of
another condenser. Place thermostats, air supplies and
returns so that the individual unit will operate within its
zone.
Installation Preparation
Before installing the unit, perform the following
procedures to ensure proper unit operation.
1. Verify the installation location is level.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 surfacesinside 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 the
3. Position the unit in its final location.
Unit Placement
Install the unit on a firm, level surface.
Installing Optional Accessories
Before installing ductwork, install accessories on unit.
“Service Access,” p. 7 section.
Dimensions and Weights
Table 1. Unit dimensions (with Micro-channel
Unit
Size
(tons)
5 56.69 20.63 20.63 18.92 18.92 945 856
7.5 —————1342 1210
10 —————1474 1342
15 —————2077 1923
Note: 7.5-ton and 10-ton in Figure 2, p. 9, 15-ton in Figure 3, p. 9
Figure 1. 5-ton unit
74.80
2.76
condenser coil), in-lbs.
Weights
A B C D E Ship Operating
BC15.43
24.90
D
A
FORKLIFT ACCESS
front view
18.86
31.50
13.64
SUPPLY
AIR
RETURN
AIR
CONDENSER
DISCHARGE
E
CONDENSER
RETURN
SIDE
ACCESS
SIDE
ACCESS
2.74
SUPPLY
AIR
24.90
0.75
74.80
2.76
34.25
CONDENSER COIL
back view
side view
8 SXIJ-SVX01B-EN
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