Trane TR-SCS Series Installation and operating instructions

Remote Air-Cooled Condensers
Outdoor Cooling Systems
Installation, Operation, and Maintenance
December 2020 SS-SVX006C-EN
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.

© 2020 Trane SS-SVX006C-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 Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates 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.
NOTICE 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 and HCFCs such as saturated or unsaturated HFCs
and HCFCs.
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 according to local rules. For
the USA, the Federal Clean Air Act (Section 608) sets forth
the requirements for handling, reclaiming, recovering and
recycling of certain refrigerants and the equipment that is
used in these service procedures. In addition, some states
or municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding
Required!
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.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• 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 Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS
referto theappropriateSDSandOSHA/GHS
(Global Harmonized System of Classification and
Labeling 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.

WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work, electrical,
fall protection, lockout/tagout, refrigerant handling,
etc. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.
Introduction
SS-SVX006C-EN 3
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
All trademarks referenced in this document are the
trademarks of their respective owners.
Revision History
Updated Model Number Descriptions chapter.

4SS-SVX006C-EN
Table of Contents
Model Number Descriptions . . . . . . . . . . . . . . 5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product Description . . . . . . . . . . . . . . . . . . . . 6
Capabilities and Features . . . . . . . . . . . . . 6
Safety Features . . . . . . . . . . . . . . . . . . . . . . 6
Application Ranges . . . . . . . . . . . . . . . . . . 6
General Design . . . . . . . . . . . . . . . . . . . . . . . . 7
Condenser Coil . . . . . . . . . . . . . . . . . . . . . . 7
TR-SCS Condenser Coils . . . . . . . . . . . . . . 7
TR-SCS-MC Micro-Channel Condenser Coils
7
Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . 7
Electric Box . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver (Optional) . . . . . . . . . . . . . . . . . . . 7
Head Pressure Controls . . . . . . . . . . . . . . . . 8
Condenser Fan Cycling (AA Models) . . . . 8
Variable Condenser Fan Speed (SA Models)
8
Flooded Head Pressure Control . . . . . . . . 8
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Receiving the Equipment . . . . . . . . . . . . . . 10
Site Preparation . . . . . . . . . . . . . . . . . . . . . . 10
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting and Placement . . . . . . . . . . . . . . 11
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Line Sizing . . . . . . . . . . . . . . . 13
Head Pressure Control Valve Installation (TR-
SCS condenser only) . . . . . . . . . . . . . . . . 15
Receiver Pipe Installation (TR-SCS condenser
only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Utility Connections . . . . . . . . . . . . . . . . . . . 15
Main Power and Control Wiring . . . . . . . 15
System Charging . . . . . . . . . . . . . . . . . . . . . 17
R407C/R410A Refrigerant . . . . . . . . . . . . 17
Estimating Refrigerant Charge . . . . . . . . 17
Preparing System for Charging . . . . . . . 18
Refrigerant Charging Procedures . . . . . . 19
Refrigerant Characteristics . . . . . . . . . . . . . .21
Pressure/Temperature Settings . . . . . . . .21
Saturated Refrigerant Pressure . . . . . . . . .21
Startup and Commissioning . . . . . . . . . . . . . .24
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Operational Description . . . . . . . . . . . . . . .24
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Periodic General Maintenance . . . . . . . . . .25
General . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Field Service . . . . . . . . . . . . . . . . . . . . . . . . . .25
Leak Detection . . . . . . . . . . . . . . . . . . . . . .25
Leak Repair . . . . . . . . . . . . . . . . . . . . . . . . .25
Refrigerant Piping . . . . . . . . . . . . . . . . . . .25
Electrical System . . . . . . . . . . . . . . . . . . . .25
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .26
Recommended Maintenance . . . . . . . . . . . .27
Monthly . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Semi-Annually . . . . . . . . . . . . . . . . . . . . . .27
Annually . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Product Support . . . . . . . . . . . . . . . . . . . . . . . . .28
Factory Authorized Start Up/Warranty Inspec-
tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Technical Support . . . . . . . . . . . . . . . . . . . . .28
Obtaining Warranty Parts . . . . . . . . . . . . . . .28
Obtaining Spare/Replacement Parts . . . . . .28
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Installation Checklist . . . . . . . . . . . . . . . . . . .29

SS-SVX006C-EN 5
TR-SCS Series Condensers
Digit 1,2,3,4,5— Unit
Configuration
TR-SCS = Series Condenser
Digit 8,9,10,11- Capacity (MBH)
012
018
024
036
060
096
120
144
192
252
276
312
447
525
597
683
940
1366
Digit 12 - Circuits
S=Single
D= Dual
Digit 13,14 - Fan Options
AA = Fan Cycle Control
SA = Variable Speed Control
EC = Variable Speed Control
(Electronically Commutated Fans)
About Digits
Model numbers are comprised of
digits. Each digit, or set of digits,
defines the product model.
Example using model 
TR-SCS-096-S-SA:
• Series Condenser
(SCS, digits 1,2,3,4,5)
• 96,000 MBH Capacity 
(digits 8,9,10,11)
• Single Circuits (digit 12)
• Variable Speed Control 
(digit 13,14)
TR-SCS Series Micro-Channel
Condenser
Digit 1,2,3,4,5,6,7 — Unit
Configuration
TR-SCS-MC = Condenser Section with
Micro-Channel Coil
Digit 8,9,10 - Capacity (MBH)
015
018
031
035
056
071
111
128
142
223
264
334
Digit 11 - Circuits
S=Single
D= Dual
Digit 12,13 - Fan Options
EC = Variable Speed Control
(Electronically Commutated Fans)
LN = Low Noise Variable Speed
Control
(Electronically Commutated Fans)
Digit 14 - Receiver Options
O= Standard
F = Flooded Head Pressure Control
with Receiver
Digit 15 - Refrigerant
1 = R407C
2 = R410A
Example using model 
TR-SCS-MC-056-D-LN-F-1:
• Condenser Section with Micro-
Channel Coil 
(SCS-MC, digits 1,2,3,4,5,6,7)
• 56,000 MBH Capacity 
(digits 8,9,10)
• Dual Circuits (digit 11)
• Low Noise Variable Speed Control
(digit 12,13)
• Flooded Head Pressure Control
with Receiver (digit 14)
• R407C Refrigerant (Unit 15)
Model Number Descriptions

6SS-SVX006C-EN
Introduction
General
The Remote Air-Cooled Condenser is designed and
manufactured by STULZ. Recognized as a world leader,
Trane provides precision cooling systems with the highest
quality craftsmanship using the finest materials available
in the industry. The unit will provide years of trouble-free
service if installed and maintained in accordance with this
manual. Damage to the unit from improper installation,
operation or maintenance is not covered by the warranty.
This manual contains information for installation,
operation, maintenance, troubleshooting and repair.
Study the instructions contained in this manual. They
must be followed to avoid difficulties. Spare parts are
available from Trane to insure continuous operation.
Using substitute parts or bypassing electrical or
refrigeration components to continue operation is not
recommended and will void the warranty. Due to
technological advancements, components are subject to
change without notice.
Trane Air-cooled Condensers are designed to reject heat
from refrigerant based cooling equipment. Any use
beyond this is deemed to be not intended. Trane is not
liable for any damage resulting from improper use. The
unit is designed to be installed outdoors unless otherwise
noted on the equipment nameplate.
Product Description
Trane Remote Air-Cooled Condensers are designed to be
the most efficient and reliable condensers in the industry.
The unit is an air-cooled, heat rejection condenser with a
vertical air discharge pattern.
The unit is self-contained in a light weight, corrosion
resistant aluminum cabinet designed for mounting to a
horizontal surface. The cabinet houses the condenser
coil(s) and fan assembly(s). The electrical controls are in
an integrally mounted, weatherproof enclosure which is
isolated from the rest of the equipment.
There are many cabinet sizes based on the capacity of the
unit. Refer to the installation drawing supplied with your
unit for the layout and dimensions of your cabinet.
TR-SCS condensers are highly efficient heat rejection
systems. Enhanced performance TR-SCS-MC condensers
are also available. TR-SCS-MC condensers are equipped
with micro-channel coils which offer greater refrigerant-
to-air heat transfer. The total heat rejection in BTU/hr will
depend on the unit size. Refer to the unit nameplate to
identify the model number of your unit. The system will
consist of a single refrigeration circuit or dual circuit coil.
The coil is a closed-loop refrigerant condensing heat
exchanger in which refrigerant is continuously circulated
by the pressure differential created by a compressor.
The compressor increases refrigerant pressure to a level
sufficiently high for it to be cooled and condensed into
liquid by the effect of ambient air being drawn over the
condenser coil. Trane condensers are designed to operate
with either R407C or R410A refrigerant. Refer to the unit
nameplate to identify the type of refrigerant to be used in
your unit.
Outdoor air-cooled condensers use fan cycling for low
ambient head pressure control down to 0°F (TR-OHS only).
Variable fan speed control is used for operation in low
ambient temperatures down to -20°F. Flooded head
pressure control is used with fan cycling for low ambient
temperatures down to -30°F.
Operation of the condenser is independent, controlled by
the refrigerant pressure. It can be wired in the field for the
system controller (provided with the indoor evaporator
section) to enable condenser operation.
Capabilities and Features
• All aluminum cabinet construction.
• Mounting legs.
• Direct driven axial fan(s) equipped with external rotor
motors.
•Unit mounted, weather resistant control enclosure
with lockable service disconnect switch.
Safety Features
The remote air-cooled condenser is provided with a
factory mounted service disconnect switch. The service
disconnect switch electrically isolates the unit during
routine maintenance. The handle of the switch may be
locked in the “Off” position to prevent unauthorized
operation. Finger guard grilles are provided on each fan to
protect the operator from injury and to keep large tools or
other objects from falling into the fan.
Application Ranges
Trane remote air-cooled condensers are designed for
operation within the following ranges.
Outdoor Temperature Range
FixedFan CyclingControl (TR-OHSonly) 0ºF or higher
Variable Fan Speed Control -20ºF or higher
Flooded Head Pressure Control -30ºF or higher
Operating Voltage
VAC Input per unit nameplate +/- 10%.
Max. Piping Length; Indoor
Evaporator to Condenser 150 ft equivalent length
Max. Level Drop; Indoor Evaporator
to Condenser 20 ft (if condenser is below
the evaporator)
Storage Conditions -30 ºF to 105 ºF

Introduction
SS-SVX006C-EN 7
Note: Damage or malfunction to the unit due to storage
or operation outside of these ranges will VOID THE
WARRANTY.
General Design
Trane TR-SCS series remote air-cooled condensers are
housed in an aluminum frame cabinet and are rated for
outdoor use. The figures that follow depict the two types
of condensers and identifies the major components.
Figure 1 depicts a layout of a typical TR-SCS condenser.
Figure 2 depicts a layout of a typical TR-SCS-MC
condenser.
Condenser Coil
The capacity of the condenser, indicated by the unit model
number, is based on the rated capacity of the coil. In the
case of dual circuit units, the model number is based on
the combined capacity of both coils.
TR-SCS Condenser Coils
TR-SCS condenser coils are copper tube, aluminum finned
coils.
TR-SCS-MC Micro-Channel Condenser
Coils
TR-SCS-MC condenser coils are brazed all-aluminum
construction with high performance fins which provide
improved airflow and higher heat transfer.
Figure 1. Typical layout - TR-SCS condenser
Electric Box
Service Switch
Fan with
Finger Guard
Adjustable Mounting
Support Leg
(Must be fully extended)
Figure 2. Typical layout - TR-SCS-MC condenser
Fan with Finger Guard
Lifting Eye
Electric Box
Service Disconnect
Switch Receiver
(Optional)
Fan Assembly
The condenser is equipped with high efficiency axial type,
impeller fan(s) rated for outdoor applications. The
quantity of fans vary depending upon the capacity of the
unit. The fan(s) use corrosion resistant, multi-blade
impellers designed for high aerodynamic efficiency which
results in lower power consumption, lower noise levels
and longer life. Each fan uses a direct driven motor with
maintenance free bearings. The fan motors are internally
protected from overload.
Electric Box
The electrical components are protected in a weather
resistant enclosure located at the header end of the unit.
The electric box has a removable front access panel which
is safety interlocked with the service disconnect switch,
preventing the panel from being removed when the switch
is in the “On” position. The switch must be turned “Off” to
gain access to the electrical components.
Receiver (Optional)
Receivers are furnished for air-cooled condensers using
flooded head pressure control for low ambient
temperature conditions. The optional receivers are
equipped with pressure relief valves and heater pads.
Receivers for TR-SCS condensers are mounted to a coated
steel base frame which may be attached to a suitable
foundation next to the condenser (see Figure 8, p. 12). A
head pressure control valve may be shipped loose for field
installation to the receiver if one is not already provided in
the indoor A/C unit.
The TR-SCS-MC condenser design differs in that receivers
are integrally mounted to the condenser frame (see
Figure 2). For -30°F applications a head pressure control
valve is factory installed and piped to the receiver.

Introduction
8SS-SVX006C-EN
Head Pressure Controls
Condenser Fan Cycling (AA Models)
Used for outdoor installations where ambient condenser
air inlet temperatures are 0 °F or higher, a condenser fan
cycling switch monitors refrigerant discharge pressure
and turns on the condenser fan as required to maintain
allowable condenser pressures. This is a high-pressure
differential control switch with Single Pole Single Throw
(SPST) contacts and an automatic reset. The switch
activates the condenser fan contactor to maintain
condensing temperature when the discharge pressure
rises. See Table 2, p. 8 for the fan cycling pressure control
settings.
Note: It may be necessary to alter the fan cycling control
settings on a case by case basis. This is due, in part,
to site specific heat loads and varying BTU
capacities of indoor evaporator (A/C) units. Contact
Trane Product Support for assistance.
On single circuit condensers, each fan is controlled with its
own fan cycling switch. Multiple fans are staged to operate
sequentially as discharge pressure rises. The primary fan
(closest to the header) turns on 1st as described above. If
pressure continues to rise, adjacent fan(s) are set to turn
on in sequential increments with the fan located furthest
from the header turning on last. Conversely, as discharge
pressure drops, the fans drop out sequentially in reverse
order.
Dual Circuit condensers employ a fan cycling pressure
control switch for each refrigeration circuit. For smaller
model condensers, two control switches (one per
refrigeration circuit) are adjusted to the same pressure
setpoint and are wired in parallel to operate a single fan.
If either control switch senses a rise in pressure, the fan
will turn on. On dual circuit units with multiple fans,
operation of each additional fan requires two paralleled
pressure control switches (one for each refrigeration
circuit). Each set of paralleled switches will be set to the
same pressure such that the adjacent fans begin operating
at sequentially higher pressure increments. For larger
model micro-channel condensers (TR-SCS-MC-111
through TR-SCS-MC-334) the fan cycling pressure control
switches are not in parallel. The control switches operate
the fan(s) assigned to each refrigeration circuit
independently.
Variable Condenser Fan Speed (SA
Models)
Used for outdoor installations where ambient condenser
air inlet temperatures may fall to -20°F, a variable speed
condenser fan motor controller is used to maintain head
pressure. The fan speed control is a continual modulation
of the motor’s speed. The condenser fan speed controller
monitors the refrigerant discharge pressure and as
discharge pressure rises, the fan speed increases. The
condenser fan speed varies as required to maintain
allowable condenser pressures. The fan speed controller
is set to maintain the correct condensing pressure. See
Table 2 for the variable fan speed pressure control
settings.
When used on systems with multiple condenser fans,
variable fan speed control is used only on the first fan
which is closest to the header. Additional fans use
pressure fan cycling control as described in“Condenser
Fan Cycling (AA Models),” p. 8 , to assist the variable
speed fan to maintain proper head pressure.
Table 1. Fan cycling pressure control settings
Refrigerant Type 1st Fan 2nd Fan 3rd Fan 4th Fan
Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out
R407C 320 psig 240 psig 330 psig 250 psig 340 psig 260 psig 345 psig 265 psig
R410A 440 psig 330 psig 460 psig 345 psig 475 psig 355 psig 485 psig 375 psig
Table 2. Variable fan speed control settings
Refrigerant Type 1st Fan (Variable) 2nd Fan 3rd Fan 4th Fan
Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out
R407C 240 psig 315 psig 325 psig 255 psig 340 psig 260 psig 345 psig 265 psig
R410A 340 psig 440 psig 460 psig 355 psig 475 psig 365 psig 485 psig 375 psig
Flooded Head Pressure Control
Used for outdoor installations where ambient condenser
air inlet temperatures may fall to -30°F, flooded head
pressure control is used to maintain head pressure during
the low ambient temperature conditions. A head pressure
control valve and a receiver are used in the refrigeration
circuit to back up liquid refrigerant into the condenser coil.
The head pressure control valve is a 3-way modulating
valve controlled by the discharge pressure (see Figure 3,
p. 9). The head pressure control valve and the receiver
may be located with the RCU or with the indoor evaporator
unit.
When the A/C unit begins to operate, the discharge
pressure rises. When the pressure reaches the “1st Fan”
pressure control setting ( See Table 1), the condenser fan
is cycled on. If multiple fans are used, they will operate by
pressure fan cycling.

Introduction
SS-SVX006C-EN 9
When ambient temperature drops, the discharge pressure
drops also. When the discharge pressure drops, the head
pressure control valve diverts discharge gas away from
the condenser to the receiver. Liquid flow from the
condenser is restricted, causing liquid to back up in the
condenser.
Flooding the condenser reduces the area available for
condensing. The desiredresult is to increase the pressure
into the condenser, maintaining a minimum discharge
pressure during low ambient operation thus ensuring
proper condensing temperature. The head pressure
control valve requires no adjustment.
This method of controlling head pressure allows the
condenser fan to run continuously. While the fan is
running, the flooded head pressure control valve
modulates the amount of discharge gas entering the
receiver. As the pressure increases, the valve diverts more
discharge gas to the condenser, allowing more liquid to
flow from the condenser to the receiver.
When using this method of head pressure regulation there
must be enough refrigerant in the system to ensure an
adequate charge at the lowest expected ambient
temperature in which the system will be operating. A
receiver is used to store the extra refrigerant when the
condenser is not utilizing it.
Figure 3. Flooded head pressure control diagram
REMOTE AIR COOLED
CONDENSER
RECEIVER
HEAD PRESSURE
REFRIGERANT
RECLAIM VALVE
PRESSURE
RELIEF VALVE
DISCHARGE LINE
LIQUID LINE
CHECK
VALVE
CONTROL VALVE
(SEE NOTE)
NOTE: SEPARATE CHECK VALVE IS PROVIDED
ONLY ON SMALL A/C UNITS UP TO 3 TONS

10 SS-SVX006C-EN
Installation
Receiving the Equipment
Your system has been tested and inspected prior to
shipment. To ensure that your equipment is received in
excellent condition, make a visual inspection of the
equipment immediately upon delivery. Carefully remove
the shipping container and all protective packaging. Open
the electric box and thoroughly inspect the unit for any
signs of transit-incurred damage. If there is shipping
damage, it must be noted on the freight carrier’s delivery
forms before signing for the equipment. Any freight
claims must be done through the freight carrier.
Trane ships all equipment FOB factory. Trane is not liable
for any equipment damage while in transit. Trane can
assist in the claim filing process with the freight carrier.
Should any damage be present, notify Trane Product
Support prior to attempting any repairs. Check the
equipment against the packing slip to see if the shipment
is complete. Report any discrepancies to the appropriate
authority.
A Data Package has been sent with your unit. It contains
this manual, system drawings, applicable SSDs and other
appropriate instructions based on the configuration of
your unit and options selected. The data package has been
shipped with your unit in a clear plastic bag. These
documents need to be kept with the unit for future
reference.
Site Preparation
Our Air-cooled Condensers are designed with easy service
access in mind. Install the condenser in a secure location
where it cannot be tampered with and the main power
disconnect switch cannot be inadvertently turned Off.
Allow access to the unit for routine operation, servicing
and for necessary maintenance. The components on
outdoor condensers are accessed through the top by
removing the fan assembly panel.
The electric box is accessed at the header end of the unit.
Locate the unit where the fan(s) are not likely to draw dirt
and debris into the coil fins. Refer to the installation
drawing provided with your unit for the dimensions.
The condenser must be kept level to operate properly.
Note: Working clearance requirements need to be
established prior to mounting the unit. Refer to
local and national electrical codes.
Rigging
WARNING
Improper Unit Lift!
Failure to properly lift unit in a LEVEL position could
result in unit dropping and possibly crushing operator/
technician which could result in death or serious injury,
and equipment or property-only damage.
Test lift unit approximately 24 inches (61 cm) to verify
proper center of gravity lift point. To avoid dropping of
unit, reposition lifting point if unit is not level.
WARNING
Heavy Object!
Failure to follow instructions below could result in unit
dropping which could result in death or serious injury,
and equipment or property-only damage.
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.
The unit must be lifted vertically and kept in a level
position. Move the unit with a suitable device such as a
forklift or attach an overhead lifting sling. The unit may be
lifted with an overhead sling attached to the top of the
mounting support legs. Use an appropriate lifting device
that has the capacity to safely handle the weight of the
equipment. A weight table is provided on the installation
drawing supplied with your unit. If using an overhead
lifting device, use spreader bars that exceed the cabinet
width to avoid crushing the sides of the unit.
Remote condensers are shipped on a skid to facilitate
moving prior to installation. The unit should always be
stored in a dry location prior to installation. To prevent
damage when lifting the unit, all available lifting eyes on
the cabinet must be used.
Note: Ensure the mounting legs are fully extended when
the unit is raised.

Figure 4. Rigging
NOTICE
Coil Fins Damage!
Take care not to damage the exposed coil fins on the
underside of the cabinet when moving the unit.
Installation
SS-SVX006C-EN 11
Mounting and Placement
Outdoor, air-cooled condensers are designed for
mounting to a flat surface. Condenser(s) must not be near
steam, hot air or fume exhausts. Avoid overhead
obstructions. Ensure the unit is not located above or near
noise sensitive areas. If possible, make use of terrain
features such as trees and buildings to provide a shaded
location. This will minimize the solar load on the unit.
Avoid ground level sites that are accessible to the public.
Ensure the mounting location can support the weight of
the equipment. Refer to the installation drawing for the
non-charged system weight.
When installing the unit on a roof, ensure the weight is
adequately distributed to the load bearing points. For
ground mounted units, install a concrete slab as shown in
Figure 4. The slab should extend below the frost line and
be at least 2 inches higher than the surrounding grade. The
slab should extend at least 2 inches beyond the outer
profile of the condenser on all sides.
Ensure the condenser legs are fully extended to optimize
air flow. Secure the unit with fasteners (field supplied by
others) to prevent the system from moving during
operation. To reduce the vibration transmission to the
mounting surface it is recommended that vibration
isolators (field supplied by others) be inserted between the
mounting rails and the base as shown in Figure 5, p. 11.
Figure 5. Ground mounting
BUSHING
MOUNTING
RAIL
FLAT WASHER
LOCK WASHER
FLAT WASHER
HEX NUT
HEX NUT
MOUNTING STUD
VIBRATION
PAD
PIPE
SUPPORT
STAND
1 FT.
MAX

Installation
12 SS-SVX006C-EN
The clearance around the unit to the nearest wall or
obstruction should be at least 1 time’s (1×) the unit’s width
to ensure adequate airflow to the coil(s) (see Figure 5 and
Figure 6). Space multiple units at least 2 times (2×) the
unit’s width when placing them side by side. Ensure hot
exhaust air is not directed toward the air inlet of an
adjacent unit. When placing units end to end, allow at least
4 feet of space between units. Avoid areas where heavy
snow will accumulate at air inlet and outlet openings.
If the unit(s) are surrounded by three walls or if they are in
a pit, space them at least 2 times (2×) the unit’s width from
the nearest walls (see Figure 7, p. 12). The top of the unit
must be equal to the height of the walls or the pit. A stack
may be used, if necessary, to extend the air discharge. The
height of the extension must not exceed 10 feet.
Figure 6. Side clearance
Figure 7. Walled areas or pits
Receiver
Receivers are provided as an option for systems utilizing
flooded head pressure control. Receivers for TR-SCS
condensers are provided on a separate mounting base
frame. Position optional TR-SCS receiver(s) as close as
possible to the condenser inlet/outlet pipe stubs. Secure
the receiver base frame to the foundation using the
mounting holes in the base. (Receivers for TR-SCS-MC
condensers are factory mounted to the condenser frame.)
Figure 8. Receiver assembly
Head Pressure Control Valve
For TR-SCS condensers, the head pressure control valve
(HPCV) is shipped loose for field installation. The head
pressure control valve is to be located at the condenser
and brazed in line with the piping between the condenser
and receiver. For TR-SCS-MC condensers, the HPCV is
factory piped to the receiver.
Refrigerant Piping
Split air-cooled systems require a field installed copper
discharge line and copper liquid line between the
condenser and the evaporator. Dual circuited condensers
will require two sets of piping. Refer to the refrigeration
diagram provided with your unit for piping details.
Provide a permanent stand or support brace for the inlet/
outlet pipes within one foot of the condenser header to
prevent undue stress on soldered connections (see
Figure 5, p. 11). The refrigerant piping should be isolated
by vibration isolating supports. Provide supports (clamps
or hangers) as necessary every 5 to 10 feet along piping
runs to minimize vibration and noise transmission. When
sealing openings in walls use a soft flexible material to
pack around the piping to reduce vibration transmission
and prevent pipe damage.
All refrigerant piping should be installed with high
temperature soldered joints. Use standard refrigeration
practices for piping supports, leak testing, dehydration
and charging of the refrigeration circuits.
Note: Refer to the Copeland Applications Data Guide for
more detailed information regarding installation of
refrigerant piping.
The condenser is shipped with a dry nitrogen holding
charge which must be removed before piping and
charging the system. All refrigeration piping should be
installed with high temperature brazed joints. Use
standard refrigeration practices for piping, leak testing,
dehydration and charging of the refrigeration circuits. For
copper to copper brazing (piping liquid line or discharge
line), phosphorous alloy containing a minimum of 15%
1x WIDTH
2x
WIDTH
1x
WIDTH
TOP VIEW
2x
WIDTH 2x
WIDTH
10 FT. MAX.
STACK AIR
FLOW
20 INCH MINIMUM
Outlet
Outlet
Inlet
Inlet
Junction Box
Pressure Relief
Valve
Sight Glass
(Optional)
Rotalock Valve (4X) with 7/8 in.
ODS Connection
Base Frame
Heater Pad

Installation
SS-SVX006C-EN 13
silver is recommended. General purpose silver brazing
alloy with 45% silver is recommended for brazing
dissimilar metals.
Wrap wet rags around the pipes between the areas to be
soldered and any nearby refrigeration components (such
as the optional head pressure control valve) to keep
excessive heat from traveling through the pipe and
causing damage. Clear all pipe connections of debris and
prep connections for soldering. Use only “L” or “K” grade
refrigerant copper piping. Be careful not to allow solder/
piping debris to get inside refrigerant lines. Dry nitrogen
should be flowing through the tubing while soldering at a
rate of not less than 1–2 CFM (0.03–0.6 M3/minute).
Refrigerant Line Sizing
The following general guidelines may be used to assist in
determining the size of the refrigerant lines between the
evaporator section and the remote air-cooled condenser.
Note: Refrigerant piping between the indoor evaporator
and condenser must not exceed 150 feet (total
equivalent length). The maximum level drop from
the indoor evaporator to the condenser must not
exceed 20 feet.
Refrigerant lines for split systems must be sized according
to the piping distance between the evaporator and the
condenser with consideration to elevation changes. Each
valve, fitting and bend in the refrigerant line must also be
considered in this calculation. Refer to table below for
standard equivalent lengths, in feet, of straight pipe.
Table 3. Pipe equivalent lengths
Equivalent Length (ft) of Straight Pipe
OD (in.)
Line Size
Globe
Valve
Angle
Valve
90º
Elbow
45º
Elbow
Tee
Line
Tee
Branch
1/2 9.0 5.0 0.9 0.4 0.6 2.0
5/8 12.0 6.0 1.0 0.5 0.8 2.5
7/8 15.0 8.0 1.5 0.7 1.0 3.5
1-1/8 22.0 12.0 1.8 0.9 1.5 4.5
1-3/8 28.0 15.0 2.4 1.2 1.8 6.0
1-5/8 35.0 17.0 2.8 1.4 2.0 7.0
2-1/8 45.0 22.0 3.9 1.8 3.0 10.0
Refer to the installation manual provided with the A/C
system for tables showing the recommended liquid line
and discharge line sizes for the A/C system you are
installing.
Things to consider when sizing refrigerant piping are the
varying BTU capacities of indoor evaporators and the
equivalent length of pipe needed between the remote
condenser and the evaporator.
If the pressure drop is too high, the capacity of the
compressor decreases, and the power required increases.
An excessive refrigerant charge will be applied if the
volume of the piping is too large. Refrigerant line sizing for
discharge and liquid lines should create no more than a 
2–3°F pressure drop.
Note: The size of the condenser pipe connections does
not indicate the size of the refrigerant lines to be
used. In cases where the pipe size doesn’t match
the size of the connection, reducing fittings must be
used to transition between the connection and the
pipe.
Discharge Line
Since refrigerant may condense during “Off” cycles, all
vertical discharge risers should be designed to prevent
liquid refrigerant from flowing back into the compressor.
If a condenser is installed above the evaporator, the
discharge line should include a shallow P-trap at the
lowest point in the piping (see Figure 9, p. 14).
The highest point in the discharge line should be above the
condenser coil. Install an inverted trap at the condenser
inlet to prevent liquid refrigerant from flowing backwards
into the hot gas riser during off cycles. Shallow P-traps
must be included in the discharge line for every 20 feet of
vertical rise. All horizontal refrigerant lines should be
pitched in the direction of flow at least 1/4 inch per 10 feet.
Discharge line velocities must be a minimum of 500 fpm
for horizontal runs and 1,000 fpm for vertical risers to
ensure oil is returned to the compressor at both full and
partial load operating conditions.
It is important that the discharge line is sized with a certain
degree of pressure drop. This will ensure the refrigerant
flows at a velocity high enough for the refrigerant vapor to
carry the oil with it to the condenser and to prevent the oil
from returning to the compressor.
Compressor discharge pressure is always higher than
condensing pressure due to the line pressure drop. The
line pressure drop also causes a change in the refrigerant
saturation temperature. The discharge line needs to be
sized so the pressure drop won’t cause a corresponding
change in saturation temperature exceeding 2°F.
Discharge piping is typically sized for a total line pressure
drop of 5 psi (+/- 50%), which results in only a 1/2% to 1%
reduction in compressor capacity. Pressure drops greater
than 10 psi will impair system performance.
Figure 9, p. 14 depicts a typical piping diagram when the
condenser is located at a higher level than the indoor
evaporator. In this situation, it is especially important to
size the discharge line properly. If the discharge line is
sized correctly for full load operation, the velocity of the
gas may be too low during minimum load conditions to
carry the refrigerant oil vertically through the discharge
line to the condenser coil.
Decreasing the size of the discharge line will increase the
refrigerant velocity, however, it will also restrict the flow of
refrigerant at full load conditions creating an excessive
refrigerant pressure drop.
To remedy this, dual risers may be used as shown in
Figure 10, p. 14. Discharge riser #1 should be sized to
allow the refrigerant gas to flow at a sufficient velocity
during minimum load conditions to carry the oil.

Installation
14 SS-SVX006C-EN
Riser #2 should be sized in such way that the inside
diameter of riser #1 and #2 will together have a combined
area allowing for a flow velocity that’s suitable to carry the
refrigerant oil to the condenser during peak load
conditions.
Use a trap between the 2 risers so riser #2 will be sealed off
when the trap fills with oil during partial load operation,
thus diverting the flow of refrigerant to riser #1.
Figure 9. Piping installation
Figure 10. Dual riser piping
Liquid Line
The velocity of refrigerant in the liquid line is less critical
because liquid refrigerant and oil are mixed thoroughly in
the liquid state. The main concern when sizing the liquid
line is to maintain a solid head of liquid refrigerant
entering the thermostatic expansion valve (TXV). If the
refrigerant pressure falls below its saturation
temperature, a portion of the liquid refrigerant may
change into vapor. Vapor will cause flashing and prevent
the TXV from functioning properly. As flashing begins, the
rate of pressure loss increases.
The liquid refrigerant is sub-cooled slightly below its
saturation temperature. Sub-cooling must be sufficient to
allow the necessary pressure drop without approaching a
saturation condition where gas flashing could occur.
Under normal operation the refrigerant is sufficiently
cooled as it leaves the condenser to allow for normal line
pressure drops.
Liquid line size is to be selected based on a pressure drop
equivalent to 2°F sub-cooling.
Operating liquid line velocities should be less than 
300 fpm to avoid liquid hammering during solenoid
operation. If the condenser is installed below the
evaporator section, the installer must observe the
pressure changes that occur if the elevation change. See
Table 4, p. 15 that follows for the vertical pressure drops
for the two types of refrigerant used.
PITCH IN DIRECTION OF REFRIGERANT FLOW
(DISCHARGE & LIQUID LINES)
TRAP IN BOTTOM OF COLUMN
WITH MINIMUM TRAP DEPTH POSSIBLE
TRAP EVERY 20 FEET WITH MINIMUM TRAP
DEPTH POSSIBLE
PITCH 1/4 INCH FOR EVERY 10 FEET OF RUN
CONDENSER
INVERTED TRAP
AIR
CONDITIONER
PITCH IN DIRECTION OF REFRIGERANT FLOW
DISCHARGE
LINE LIQUID
LINE
PITCH IN DIRECTION OF REFRIGERANT FLOW
(DISCHARGE & LIQUID LINES)
TRAP IN BOTTOM OF COLUMN
WITH MINIMUM TRAP DEPTH POSSIBLE
TRAP EVERY 20 FEET WITH MINIMUM TRAP
DEPTH POSSIBLE
PITCH 1/4 INCH FOR EVERY 10 FEET OF RUN
CONDENSER
INVERTED TRAP
AIR
CONDITIONER
PITCH IN DIRECTION OF REFRIGERANT FLOW
DISCHARGE
LINE(S) LIQUID
LINE
RISER #2
RISER #1

Table 4. Pressure drops
Refrigerant Type
Pressure Drop in
PSI/ft (Risers)
R407C 0.47
R410A 0.43
Installation
SS-SVX006C-EN 15
Note: When a receiver is used with the equipment, it
should be below the level of the condenser. The
liquid line from the condenser to the receiver
should be liberally sized to allow the refrigerant to
freely flow from the condenser to the receiver. The
total refrigerant line pressure drop must not
exceed 14 psig across the condenser and the
interconnecting piping to the evaporator and
condenser sections.
Head Pressure Control Valve Installation
(TR-SCS condenser only)
Refer to the refrigeration diagram provided with your unit
and see Figure 3, p. 9 for details on piping the head
pressure control valve to the condenser and receiver.
Receiver Pipe Installation (TR-SCS
condenser only)
Receiver inlets and outlets are equipped with RotoLock
valves that must have brazed pipe connections. It is
important to remove the valve from the adapter on the
receiver before brazing the refrigerant piping to it. Wrap
wet rags around the valve body to prevent the internal
parts from being damaged by the heat.
After brazing the pipe to the valve, remove and replace the
Teflon O-ring in the RotoLock adapter with the new one
which is cable-tied to the valve. When re-attaching the
valve to the receiver, apply thread lock to the adapter
threads to prevent it from vibrating loose. Tighten the
valve to the receiver and check it for leaks when
performing the steps given in Preparing System for
Charging section.
Utility Connections
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/national electrical codes.
Main Power and Control Wiring
Systems equipped with a remote condenser require field
wiring (see Figure 10, p. 14). The installer must provide
main power wiring to the remote condenser control box.
The condenser is provided with main power and control
terminal positions for connection of the field wiring
(supplied by others). Additional conductors may be
necessary depending on options selected.
Verify that the main power supply coincides with the
voltage, phase and frequency information specified on the
system nameplate (see Figure 12, p. 16). The supply
voltage measured at the unit must be within ±10% of the
voltage specified on the nameplate. The nameplate also
provides the full load amps (FLA), the current that the unit
will draw under full design load, the minimum circuit
ampacity (MCA) for wire sizing, and the maximum fuse or
HACR (Heating, Air Conditioning, Refrigeration) breaker
size (MAX FUSE/CKT BKR) for circuit protection. The unit’s
nameplate is located inside the electrical box.
Pilot holes or electrical knock-outs for the conduit are in
the bottom of the electric box. A label stating MAIN
POWER INPUT is nearby. The main power wires are
terminated at the line side of the service disconnect switch
located within the electric box. A separate equipment
ground lug is provided within the electrical box for
termination of the earth ground wire.
The control transformer supplied with the equipment is
sized and selected based upon the expected load for the
system.
NOTICE
System Component Damage!
Do not connect any additional loads to the system
control transformer. Connecting additional loads to the
factory supplied control transformer may result in
overloading of the transformer.

Figure 11. Field wiring
REMOTE AIR COOLED CONDENSER
WITH NFPA 70, N.E.C.)
INTERCONNECTING FIELD WIRING
(TO BE INSTALLED IN ACCORDANCE
OPTIONAL CONTROL WIRES
(QUANTITY VARIES)
L2
L3
L1
MAIN POWER SUPPLY
ELECTRIC BOX
RECEIVER HEATER WIRES
(IF APPLICABLE -30° F)
Figure 12. Sample Nameplate
NOTICE
Compressor Damage!
Improper wire connections could result in the reverse
rotation of the fan. To correct this problem, exchange
any two of the incoming main power wires at the main
power circuit breaker. Do NOT rewire the unit’s
individual components.
Installation
16 SS-SVX006C-EN
Identify the options that were purchased with your system
to confirm which field connections are required. The
number of control conductors needed will vary depending
on the options and type of control method being used.
Refer to the electrical drawing supplied with your unit to
determine the total number of interconnecting conductors
required for your equipment and for the proper wire
terminations.
Condenser Enable Feature
As an option, the installer may wire a 2-conductor control
cable between the A/C system and the condenser, so the
system controller may enable the condenser to operate
only when the compressor is running. You must remove
the jumper (X2:1-X2:2) from the remote condenser
terminal board (see the condenser wiring diagram). Wire
24 VAC control conductors from the terminal board within
the A/C unit to the remote condenser terminal board. If
control wires are not installed (and the jumper remains in
place), the condenser is always enabled and will turn on
and off based on the condenser’s pressure control switch
setting(s).
The condenser enable feature may be used in high
ambient temperature locations to prevent the condenser
from running unnecessarily. In some cases, outdoor
temperature conditions may raise refrigerant line
pressures high enough to cause the condenser fans to
start operating even if the compressor is not on.
Receiver Heater Wiring
If separate base frame mounted receiver(s) are used for
TR-SCS condensers, it will be necessary to provide a 2-
conductor cable for the heating pad(s). Connect the wires
from the terminals inside the junction box on the receiver
base (see Figure 8, p. 12) to the terminal block in the
condenser electric box. Drill an entrance hole in the
condenser electric box or use an available knock-out if
furnished. See the wiring diagram for the correct wire
terminal positions.
Sales Order Number: 440486_210
Model Number: TR-GPS-100-D
Item Number: GPS_SUPERBOM
Serial Number: 10033393
Electrical Data:
SCCR: 1 kA RMS Symmetrical
Voltage: 208 Phase: 3 Hz: 60
No. Wires: 4 (Including Ground)
FLA: 91.6
MCA: 98.1
Pump Motor (1): HP: 10 FLA: 26.1
Pump Motor (2): HP: FLA: 26.1
Minimum Installation Clearance: 0.0 in.
Suitable for Outdoor Use
Date of Manufacture: 06/16
Manufactured by
STULZ Air Technology Systems, Inc.
Frederick, Maryland, USA
Drycooler Fan Qty:
Drycooler Fan: HP: 1.5 FLA: 6.5
MFS: 110 A
Q.A. Acceptance:

Installation
SS-SVX006C-EN 17
System Charging
Refrigerant charging pressures vary depending on the
type of refrigerant used in the unit. Before charging, check
the unit nameplate to confirm the type of refrigerant to
use. Table 1 and Table 2 show the temperature/pressure
characteristics for R407C and R410A.
R407C/R410A Refrigerant
R407C and R410A are blended refrigerants recognized for
being safer for the environment. These refrigerants
contain no chlorine, the component in HCFC’s that
destroys the earth’s ozone layer. However, the same care
should be taken to prevent leakage because R407C and
R410A can contribute to the greenhouse effect if released.
If the refrigerant gas is released in an enclosed space, it
can suffocate.
Refrigerants that are multi-component blends have
component parts with different volatilities that result in a
change in composition and saturation temperature as
evaporation and condensation occur. Typically, the
composition of R407C vapor is different than that of R407C
liquid within a contained system. The composition of
liquid R407C refrigerant remains relatively constant,
however, the refrigerant vapor tends to separate into its
component parts even when circulating.
Estimating Refrigerant Charge
When charging a system with R407C or R410A refrigerant
it will be necessary to weigh in the refrigerant. Calculate
the amount of refrigerant needed by adding the amount of
refrigerant required for the A/C unit (shown in the A/C unit
IOM provided separately) plus the refrigerant for the
condenser (Table 5 and Table 6) plus the refrigerant
piping (Table7).
Table 5 and Table 6 may be used to estimate the minimum
amount of R407C or R410A refrigerant needed to charge
TR-SCS or TR-SCS-MC condensers by model number. In
cases of dual circuited condensers, divide the total weight
(lb) shown by 2 to determine the amount of refrigerant
needed for each circuit. The values shown in Table 5 and
Table 6 are conservative for the purpose of preventing the
system from being overcharged.
Table 5. TR-SCS condenser refrigerant charge weights (lb)
TR-SCS Model Number
R407C Charge
R407C Charge
(Condenser with
Receiver)
R410A Charge
R410A Charge
(Condenser with
Receiver)
-20°F Ambient and
Higher -30°F Ambient -20°F Ambient & Higher -30°F Ambient
012-S 0.6 2.7 0.5 2.6
018-S 0.6 2.7 0.5 2.6
024-S 1.3 5.4 1.0 5.2
036-S 1.9 8.1 1.5 7.8
060-S 2.8 12.2 2.2 11.7
060-D* 2.8 12.2 2.2 11.7
096-S 3.6 15.7 2.8 15.1
096-D* 3.6 15.7 2.8 15.1
120-S 5.4 23.6 4.2 22.7
120-D* 5.4 23.6 4.2 22.7
144-S 7.2 31.4 5.6 30.2
144-D* 7.2 31.4 5.6 30.2
192-S 8.2 35.9 6.4 34.5
192-D* 8.2 35.9 6.4 34.5
252-S 8.2 35.9 6.4 34.5
252-D* 8.2 35.9 6.4 34.5
276-D* 12.4 53.8 9.7 51.7
312-D* 12.4 53.8 9.7 51.7
447-D* 16.5 71.8 12.9 69.0
525-D* 18.4 80.1 14.4 77.0
597-D* 18.4 80.1 14.4 77.0
683-D* 24.6 106.9 19.2 102.8
940-D* 32.6 141.9 25.5 136.5
1366-D* 49.1 213.7 38.4 205.6

Table 6. TR-SCS-MC condenser refrigerant charge weights (lb)
TR-SCS Model
Number
R407C Charge
R407C Charge
(Condenser with
Receiver)
R410A Charge
R410A Charge
(Condenser with
Receiver)
-20°F Ambient &
Higher -30°F Ambient -20°F Ambient & Higher -30°F Ambient
015-S 0.8 4.4 0.8 4.0
018-S 0.9 4.5 1.0 4.2
031-S 1.3 6.9 1.3 6.4
031-D* 1.6 8.8 1.6 8.0
035-S 2.0 11.8 2.1 11.0
035-D* 2.6 13.8 2.6 12.8
056-S 2.0 11.8 2.1 11.0
056-D* 2.6 13.8 2.6 12.8
071-S 3.8 19.1 3.9 17.8
071-D* 4.8 24.4 4.8 22.6
111-S 3.8 19.1 3.9 17.8
111-D* 4.8 24.4 4.8 22.6
128-D* 5.8 36.4 6.0 33.8
142-D* 7.6 38.2 7.8 35.6
223-D* 7.6 38.2 7.8 35.6
264-D* 10.4 41.0 10.8 38.6
334-D* 10.4 41.0 10.8 38.6
Note: *Dual refrigeration circuits.
Table 7. Weight of refrigerant (lb/100 ft of type L tubing)
Line Size
O.D. Liquid Line 105°F Discharge Line 140°F Condensing
R407C R410A R407C R410A
1/2 6.51 5.88 0.87 1.27
5/8 10.46 9.44 1.40 2.03
7/8 21.73 19.62 2.91 4.22
1 1/8 37.04 33.44 4.95 7.20
1 3/8 56.43 50.95 7.55 10.97
1 5/8 79.87 72.11 10.68 15.53
2 1/8 175.32 158.29 23.44 34.09
Installation
18 SS-SVX006C-EN
Example: Estimate the amount of refrigerant required for
a system using R407C refrigerant consisting of a 5 ton A/
C unit connected with a 1/2-inch x 30 foot liquid line and 
7/8-inch x 30 foot discharge line to a TR-SCS-060-SAA 
-30 °F condenser with flooded head pressure control and
receiver.
A/C Unit = 5.2 lbs.
+ Condenser w/Receiver = 12.2 lbs.
+ ½ Liquid Line 30 x 6.51/100 = 1.953 lbs.
+7/8 inch Discharge Line 30 x 2.91/100 = 0.873 lbs.
Estimated Refrigerant Charge = 20.226 lbs.
Round off to the nearest lb> = 20 lbs.
Preparing System for Charging
1. With all the system piping connections made, perform
a dry nitrogen leak detection test on the system. Using
dry nitrogen only, pressurize the system to 150 psig.
Ensure all service and solenoid valves are energized
open and that no part of the system is isolated from the
pressurized nitrogen (liquid, suction or discharge lines
and reheat coil).
2. Since there is no refrigerant in the system to detect at
this point, leaks may be detected by observing if there
has been a change in the standing pressure after 12
hours. A significant drop in pressure indicates a leak in
the system that needs to be repaired. After the system
is determined to be free of leaks, you may evacuate the
system.
NOTICE
Compressor Damage!
A proper vacuum must be drawn on the refrigerant
system to remove moisture prior to charging. If this is
not done the refrigerant charge will combine with
moisture in the pipes to form an acid that will
eventually lead to compressor failure. A triple
evacuation procedure with dry nitrogen is
recommended especially for systems with newly
installed refrigerant piping.
Note: A vacuum pump should be used that can evacuate
the entire volume of the A/C system, including

Installation
SS-SVX006C-EN 19
newly installed or existing piping. It is essential to
use a well-maintained pump that is in good
operating condition. Always ensure it contains
clean, fresh oil. Change the oil in the pump every 20
minutes to maintain its ability to remove moisture.
Note: Use high quality hoses ensuring they are free of
defects and don’t leak. It is recommended to use
copper tubing instead of hoses if possible due to
the low vacuum that must be attained when
evacuating the system. The use of short, large
diameter hoses helps reduce evacuation time.
3. After ensuring there are no leaks, relieve pressure and
evacuate the entire system while maintaining all the
solenoids and hot gas reheat valves open. Pull an
initial vacuum of 1500 microns or lower using the
suction and discharge service ports and the service
port of the receiver (if applicable).
Note: When pulling a vacuum, the Schrader valves will
unnecessarily restrict the openings, increasing the
evacuation time. During the evacuation process it
is recommended to remove the Schrader valve
cores with a Schrader valve removal tool and draw
the vacuum through the port on the removal tool.
4. If you cannot evacuate the system below 1500
microns, close the vacuum pump isolation valve and
perform a rateof-rise test by observing the standing
pressure overtime. If the pressure rises slowly (up to
200 microns in 15 minutes) it indicates moisture is in
the system that still needs to be boiled off. Proceed to
step #5. If the pressure rises rapidly up to atmospheric
pressure (more than 50 microns per minute) it
indicates a leak that wasn’t detected during step #2. In
this case troubleshoot the entire system for leaks and
repair them. Then begin the initial evacuation process
again starting at step #3.
5. If no leaks are detected after the initial vacuum, release
the vacuum and pressurize the system with 2-3 lb of
dry nitrogen. Allow the system to stand for two hours
with the dry nitrogen charge. This gives time for the
nitrogen molecules to disperse in the system
absorbing moisture.
6. After two hours, release the pressure. Then turn on the
vacuum pump and evacuate the system a second time
down to 1500 microns or less. Close the vacuum pump
isolation valve and pressurize the system again with
dry nitrogen and allow the system to stand for two
hours as in step #5.
7. After two hours release the pressure. Turn on the
vacuum pump and complete the process of evacuating
the system, this time with a goal of achieving a 250-
micron vacuum or less. Close the vacuum pump
isolation valve. When you can hold the vacuum at 500
microns or lower for at least 2 hours with no significant
rise in pressure, the system is ready to charge.
8. Replace the Schrader valve cores if you removed them
during the evacuation steps. You may now introduce
the refrigerant charge through the Schrader valves.
Refrigerant Charging Procedures
R407C and R410A refrigerant must be weighed in when
performing the charge. Ensure an adequate supply of
refrigerant is available before beginning. Calculate the
minimum amount of refrigerant needed for your system.
When charging a system using a blended refrigerant, it is
essential that the composition of the refrigerant is
maintained. To ensure correct composition, introduce the
refrigerant (R407C or R410A) into the system in liquid form
rather than vapor form. Cylinders which are not provided
with dip tubes should be inverted to allow only liquid
refrigerant to charge the system. Keeping the temperature
of the cylinder below 85°F will help to maintain the correct
refrigerant composition while the cylinder is emptied.
NOTICE
Equipment Damage!
POE oil is used in systems with R407C or R410A
refrigerant. POE oil quickly absorbs moisture when
exposed to air. High POE oil moisture levels react with
refrigerant to form acid which results in system
contamination. Keep the entire system sealed as much
as possible and minimize exposure of the POE oil to
outside air.
Note: Refrigerant charging must be performed by a
qualified air conditioning technician. Trane
recommends using the services of our Field
Service Department to assist in start-up and
commissioning. We have assembled a highly
qualified team of experienced industry
professionals who provide expert start-up services
anywhere in the world.
They will ensure your equipment is correctly installed and
is operating properly. This will help to ensure your unit
provides years of trouble-free service while operating at
its highest efficiency. They will also enter the necessary
Information for you on the Warranty Registration and
Start-up Checklist and ensure it is filed with Trane for your
warranty protection.
WARNING
Confined Space Hazards!
Failure to follow instructions below could result in
death or serious injury.
Do not work in confined spaces where refrigerant or
other hazardous, toxic or flammable gas may be
leaking. Refrigerant or other gases could displace
available oxygen to breathe, causing possible
asphyxiation or other serious health risks. Some gases
may be flammable and or explosive. If a leak in such
spaces is detected, evacuate the area immediately and
contact the proper rescue or response authority.
Initial System Charge
Follow the step by step instructions below to charge
systems using R407C and R410A refrigerant. The initial

Installation
20 SS-SVX006C-EN
charge will be performed by introducing liquid refrigerant
(R407C or R410A) to the discharge side of the compressor
or an available liquid line port with the A/C unit turned Off.
1. Bleed air from hoses and break the vacuum by
supplying liquid refrigerant (R407C or R410A) to the
discharge port near the compressor until the pressure
is equalized. This holding charge allows the low
pressure switch to hold enabling the compressor to
operate throughout the process of charging the
system.
Fine Tuning the System Charge
Once the initial charge is completed, additional refrigerant
will need to be added with the unit running until the
superheat temperature can be maintained between 12–
15°F.
2. Disconnect the refrigerant cylinder from the discharge
side of the compressor and connect it to the suction
side.
3. Start the A/C system and use the system controller to
lower the room temperature setpoint 3–5°F below
actual room temperature thus ensuring cooling
remains on as the unit is charged.
NOTICE
Compressor Damage!
POE oil is used in systems with R407C or R410A
refrigerant. POE oil quickly absorbs moisture when
exposed to air. High POE oil moisture levels react with
refrigerant to form acid which results in system
contamination. Keep the entire system sealed as much
as possible and minimize exposure of the POE oil to
outside air.
When fine tuning the charge during low ambient
conditions it will be necessary to restrict the airflow across
the condenser coil to raise the pressure. The fan closest to
the header must be running. Refrigerant R407C operates
at a lower pressure than R410A. When fine tuning the
charge, ensure the pressures are correct for the type of
refrigerant used.
0ºF Fan Cycling and -20ºF Variable Speed
Control
The following instructions are for charging systems
provided with condenser fan cycling or variable fan speed
control during low ambient conditions using R407C or
R410A refrigerant.
1. Block off the intake air to the condenser with cardboard
until a constant discharge pressure can be obtained.
This will lower the possibility of overcharging (for units
with fan cycling only).
a. R407C Refrigerant- Allow the discharge pressure to
rise to 325–350 psig and hold it constant.
b. R410A Refrigerant- Allow the discharge pressure to
rise to 445–480 psig and hold it constant.
NOTICE
Compressor Damage!
Failure to follow instructions below could result in
compressor failure and/or reduced compressor life.
To prevent compressor liquid slugging, only add liquid
in the suction line when the compressor is running. Use
extreme caution to meter liquid refrigerant into the
suction line slowly. If liquid is added too rapidly,
compressor oil dilution and oil pumpout could occur.
2. Slowly meter liquid refrigerant through the suction
side while watching the pressure gauge and
monitoring superheat and sub-cooling temperatures.
3. Take a superheat temperature reading near the feeler
bulb from the thermostatic expansion valve with the
temperature measuring device being well insulated.
The ideal superheat temperature is 10–15°F. Maximum
allowable superheat temperature is 20°F.
4. While monitoring the pressure, take a sub-cooling
temperature reading on the output side of the
condenser. The sub-cooling temperature should be
10–20°F.
5. If necessary, (slowly) add liquid refrigerant to the
suction side to achieve the sub-cooling temperature.
6. If the unit has hot gas reheat (optional), the previous
steps are still followed except the hot gas reheat valve
must be open to allow refrigerant to flow into the
reheat coil to obtain the proper amount of refrigerant
charge. This can be done by using the system
controller to enable a call for dehumidification (lower
the humidity setpoint). This process may need to be
repeated several times. After cycling the system
through the hot gas reheat cycle, recheck the system
charge with the system only in the Cooling mode.
Important: Remove the blockage to the air intake of the
condenser. Fill out the applicable sections
of Warranty Registration and Start-Up
Checklist.
-30 °F Flooded Head Pressure Control
Note: For units using flooded head pressure control, a
receiver is used to store the refrigerant during the
time the condenser is not utilizing the extra
refrigerant charge.
Note: It is important not to exceed 80% of the total
condenser and receiver volume to allow room for
expansion.
Perform the initial system charge. Energize all solenoids,
hot gas bypass, hot gas reheat, etc. The condenser fan
nearest the condenser header should be operating
continuously. If not change the fan control setting to force
continuous operation. All other fans, if additional fans
exist, should be off during this time.