Trane R410a User manual

Start to Finish™ R-410A Scroll
Compressors
Installation Guide
August 2020 PART-SVN234B-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.
Model Numbers:
SFCOM090***4PSNAD SFCOM181***4PSNAD SFCOM300***4PSNAN
SFCOM109***4PSNAD SFCOM182***4PSNAN SFCOM301***4PSNAN
SFCOM121***4PSNAD SFCOM183***4PSNAN SFCOM360***4PSNAN
SFCOM145***4PSNAD SFCOM240***4PSNAN SFCOM361***4PSNAN
SFCOM156***4PSNAD SFCOM241***4PSNAN

© 2020 Trane PART-SVN234B-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.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified. The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain
refrigerants and the equipment that is used in these
service procedures. In addition, some states or
municipalities may have additional requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
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,
ALWAYSrefer totheappropriateSDSandOSHA/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.
WARNING
R-410A Refrigerant under Higher Pressure
than R-22!
Failure to use proper equipment or components as
described below, could result in equipment failing and
possibly exploding, which could result in death, serious
injury, or equipment damage. The units described in
this manual use R-410A refrigerant which operates at
higher pressures than R-22. Use ONLY R-410A rated
service equipment or components with these units. For
specific handling concerns with R-410A, please contact
your local Ingersoll Rand representative.
WARNING
Hazard of Explosion and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury. 
Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
WARNING
Hazard of Explosion!
Failure to follow instructions below could result in
death or serious injury or equipment or property-only
damage. Use only dry nitrogen with a pressure
regulator for pressurizing unit. Do not use acetylene,
oxygen or compressed air or mixtures containing them
for pressure testing. Do not use mixtures of a hydrogen
containing refrigerant and air above atmospheric
pressure for pressure testing as they may become
flammable and could result in an explosion. Refrigerant,
when used as a trace gas should only be mixed with dry
nitrogen for pressurizing units.
Introduction
PART-SVN234B-EN 3
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels 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 following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
WARNING
Hazardous Conditions!
Failure to follow these instructions could result in death
or serious injury or damage to the equipment. Observe
and follow the “Warning” and “Notices” labels on the
compressor.
NOTICE
Use Proper Charging and Crankcase
Heater Operation Procedures!
Failure to utilize proper charging and crankcase heater
procedure will result in compressor failure. Refer to unit
Installation, Operation, and Maintenance manual and
this manual for the proper procedures.
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

Introduction
4PART-SVN234B-EN
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 for Trane Technologies.

Table of Contents
PART-SVN234B-EN 5
Model Number Descriptions . . . . . . . . . . . . . . 6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . 8
General Information . . . . . . . . . . . . . . . . . . . . 17
POE Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Oil Handling . . . . . . . . . . . . . . . . . . . . . . . 17
Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating Envelope . . . . . . . . . . . . . . . . . . . 17
Refrigerant Type . . . . . . . . . . . . . . . . . . . . 18
Transportation, Handling, and Storage . . 18
Pre-Installation Inspections . . . . . . . . . . . 19
Repair Recommendations . . . . . . . . . . . . . 20
Mechanical Failure . . . . . . . . . . . . . . . . . . 20
Electrical Failure . . . . . . . . . . . . . . . . . . . . . . 21
Two Types of Motor Failures . . . . . . . . . 21
Removal and Installation . . . . . . . . . . . . . . . . 22
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Compressor Replacement—Tandem and Trio
Compressor Sets . . . . . . . . . . . . . . . . . . . 23
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electrical Connections . . . . . . . . . . . . . . . . . 25
Leak Detection . . . . . . . . . . . . . . . . . . . . . . . 26
Vacuum Testing and Evacuation . . . . . . . . 27
Charging the System . . . . . . . . . . . . . . . . . . 28
Verification Before Start-Up . . . . . . . . . . . . 28
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 31
182–361 Nominal Capacity Compressor Mo-
tor Protection Module Diagnosis . . . . . . 32
Log Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Replacement Scroll Compressors . . . . . . . 34
Log Sheet for Installers . . . . . . . . . . . . . . 34
Systems Check . . . . . . . . . . . . . . . . . . . . . 35
Operating Controls Check . . . . . . . . . . . . 35
Observations . . . . . . . . . . . . . . . . . . . . . . . 35

6PART-SVN234B-EN
Model Number Descriptions
Digit 1, 2 — Brand
SF = Start to Finish™
Digit 3, 4, 5 — Unit Type
COM= Scroll Compressor
Digit 6, 7, 8 — Nominal Capacity
090 = 85 MBtu/h
109 = 101 MBtu/h
121 = 117 MBtu/h
145 = 137 MBtu/h
156 = 158 MBtu/h
181 = 178 MBtu/h
182 = 176 MBtu/h, 115/230V Module
183 = 176 MBtu/h, 24V Module
240 = 237 MBtu/h, 115/230V Module
241 = 237 MBtu/h, 24V Module
300 = 298 MBtu/h, 115/230V Module
301 = 298 MBtu/h, 24V Module
360 = 359 MBtu/h, 115/230V Module
361 = 359 MBtu/h, 24V Module
Digit 9, 10, 11 — Electrical Code
230 = 200–230/60/3
460 = 460/60/3
575 = 575/60/3
Digit 12 — Refrigerant
2=R-22
4 = R-410A
Digit 13 — Lubricant
M= MineralOil
P = Polyolester (POE) Oil
Digit 14 — Connection Type
R=Rotolock
S = Stub Tube
Digit 15 — Motor Protection
E = External Protection
N = Internal Protection
Digit 16 — Revision Level
A = Initial Release
Digit 17 — Bill of Material
D
N

PART-SVN234B-EN 7
Overview
The purpose of this document is to provide installation
and service information for Start to Finish™ R-410A
compressors.
This document is not meant to be provide a step-by-step
procedure, but is intended to identify procedures or
precautions that may be unique to a Start to Finish R-410A
compressor and should be taken into account to properly
and safely remove, install, and troubleshoot the
compressor.
Each installation has its unique set of circumstances which
also must be taken into account by the service technician.
Table 1. Available Start to Finish™ compressors
Model Number Service Part Number
SFCOM0905754PSNAD SFCOM090-5754AD
SFCOM0902304PSNAD SFCOM090-2304AD
SFCOM0904604PSNAD SFCOM090-4604AD
SFCOM1095754PSNAD SFCOM109-5754AD
SFCOM1092304PSNAD SFCOM109-2304AD
SFCOM1094604PSNAD SFCOM109-4604AD
SFCOM1215754PSNAD SFCOM121-5754AD
SFCOM1212304PSNAD SFCOM121-2304AD
SFCOM1214604PSNAD SFCOM121-4604AD
SFCOM1455754PSNAD SFCOM145-5754AD
SFCOM1452304PSNAD SFCOM145-2304AD
SFCOM1454604PSNAD SFCOM145-4604AD
SFCOM1565754PSNAD SFCOM156-5754AD
SFCOM1562304PSNAD SFCOM156-2304AD
SFCOM1564604PSNAD SFCOM156-4604AD
SFCOM1815754PSNAD SFCOM181-5754AD
SFCOM1812304PSNAD SFCOM181-2304AD
SFCOM1814604PSNAD SFCOM181-4604AD
SFCOM1825754PSNAN SFCOM182-5754AN
SFCOM1832304PSNAN SFCOM183-2304AN
SFCOM1822304PSNAN SFCOM182-2304AN
SFCOM1834604PSNAN SFCOM183-4604AN
SFCOM1824604PSNAN SFCOM182-4604AN
SFCOM2415754PSNAN SFCOM241-5754AN
SFCOM2405754PSNAN SFCOM240-5754AN
SFCOM2412304PSNAN SFCOM241-2304AN
SFCOM2402304PSNAN SFCOM240-2304AN
SFCOM2414604PSNAN SFCOM241-4604AN
SFCOM2404604PSNAN SFCOM240-4604AN
SFCOM3005754PSNAN SFCOM300-5754AN
SFCOM3012304PSNAN SFCOM301-2304AN
SFCOM3002304PSNAN SFCOM300-2304AN
SFCOM3014604PSNAN SFCOM301-4604AN
SFCOM3004604PSNAN SFCOM300-4604AN
SFCOM3615754PSNAN SFCOM361-5754AN
SFCOM3605754PSNAN SFCOM360-5754AN
SFCOM361-2304AN
SFCOM3602304PSNAN SFCOM360-2304AN
SFCOM3614604PSNAN SFCOM361-4604AN
SFCOM3604604PSNAN SFCOM360-4604AN
Table 1. Available Start to Finish™ compressors
Model Number Service Part Number
SFCOM3612304PSNAN

8PART-SVN234B-EN
Dimensional Data
Figure 1. SFCOM090 compressors
APPLICATION SFCOM090
REFRIGERANT R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 85.1
POWER INPUT (KW) 8.67
EER (BTU/W-HR) 9.82
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 2. SFCOM109 and SFCOM121 compressors
APPLICATION SFCOM109 SFCOM121
REFRIGERANT R410A R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 101.0 117.1
POWER INPUT (KW) 10.15 11.58
EER (BTU/W-HR) 9.95 10.11
Dimensional Data
PART-SVN234B-EN 9
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 3. SFCOM145 compressors
APPLICATION SFCOM145
REFRIGERANT R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 137.3
POWER INPUT (KW) 13.48
EER (BTU/W-HR) 10.18
Dimensional Data
10 PART-SVN234B-EN
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 4. SFCOM156 compressors
APPLICATION SFCOM156
REFRIGERANT R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 158.2
POWER INPUT (KW) 15.33
EER (BTU/W-HR) 10.32
Dimensional Data
PART-SVN234B-EN 11
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 5. SFCOM181 compressors
APPLICATION SFCOM181
REFRIGERANT R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 177.7
POWER INPUT (KW) 17.04
EER (BTU/W-HR) 10.43
Dimensional Data
12 PART-SVN234B-EN
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 6. SFCOM182 and SFCOM183 compressors
APPLICATION SFCOM182 SFCOM183
REFRIGERANT R410A R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 176.2 176.2
POWER INPUT (KW) 17.36 17.36
EER (BTU/W-HR) 10.15 10.15
PROTECTION CONTROL MODULE
VAC 115/230 24
Dimensional Data
PART-SVN234B-EN 13
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 7. SFCOM240 and SFCOM241 compressors
APPLICATION SFCOM240 SFCOM241
REFRIGERANT R410A R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 237.4 237.4
POWER INPUT (KW) 23.46 23.46
EER (BTU/W-HR) 10.12 10.12
PROTECTION CONTROL MODULE
VAC 115/230 24
Dimensional Data
14 PART-SVN234B-EN
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 8. SFCOM300 and SFCOM301 compressors
APPLICATION SFCOM300 SFCOM301
REFRIGERANT R410A R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 298.2 298.2
POWER INPUT (KW) 29.75 29.75
EER (BTU/W-HR) 10.02 10.02
PROTECTION CONTROL MODULE
VAC 115/230 24
Dimensional Data
PART-SVN234B-EN 15
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

Figure 9. SFCOM360 and SFCOM361 compressors
APPLICATION SFCOM360 SFCOM361
REFRIGERANT R410A R410A
U.L. RECOGNIZED USA & CANADA
RATED PERFORMANCE @45°/130°/20°/15°
CAPACITY (MBTU/HR) 358.9 358.9
POWER INPUT (KW) 36.10 36.10
EER (BTU/W-HR) 9.94 9.94
PROTECTION CONTROL MODULE
VAC 115/230 24
Dimensional Data
16 PART-SVN234B-EN
Note: Fittings and connection part descriptions are
shown in Figure 13 and Figure 14, p. 19.

PART-SVN234B-EN 17
General Information
Table 2. Torque values
Item Torque
Rotolock equalizer nut 
1-3/4 and 2-1/4 133 ± 10 N·m; 98 ± 7 ft·lb
Terminal screws #10-32 X 0.5 in 2.75 ± 0.25 N·m; 25 ± 2 in·lb
Terminal stud 2.75 ± 0.25 N·m; 30 ± 2 in·lb
Terminal stud nut 3.4 ± 0.25 N·m; 30 ± 2 in·lb
Ground screw 1.90 ± 0.25 N·m; 17 ± 2 in·lb
Terminal box cover 2.15 ± 0.25 N·m; 19 ± 2 in·lb
Note: With Rotolock fittings, always use two wrenches:
one to back-up on the sleeve and one to tighten the
nut. Proper torquing of the Rotolock nut is
important to ensure a leak-free joint.
POE Oil
Table 3. Factory oil charge
Nominal Capacity Pints Liters Part Number
090 6.3 3.0 OIL00078, OIL00080
109–156 7.0 3.3 OIL00078, OIL00080
181 7.6 3.6 OIL00078, OIL00080
182–301 14.2 6.7 OIL00078, OIL00080
360–361 15.2 7.2 OIL00078, OIL00080
Notes:
1. OIL00078—1 quart container
2. OIL00080—1 gallon container
3. Oil amount and type is also printed on the nameplate.
Oil Handling
POE oil is very hygroscopic, which means it absorbs
moisture very readily. Therefore, it is important to
properly handle the oil.
POE Oil handling guidelines
• Always use the smallest container size required for the
job requirements.
• Always leave the oil container tightly sealed until time
of use.
• Do not reuse oil that has been opened.
Oil Level
Figure 10. Compressor oil label
The oil should be visible through the oil sightglass both
during operation and when the compressor(s) is off. Oil
level slightly below the sightglass, but still visible is
acceptable.
Single compressor. The oil level should be stable in the
sightglass.
Tandem and trio compressors. •Operation—The oil
level will vary depending on the operating condition.
•Unloaded condition—The running compressor will
have a higher oil level than the off compressor(s).
•Loaded condition—Oil should be visible through all
of the compressor sight glasses. Some may have a
higher level than others, but this is not abnormal.
•Off—After several minutes, the oil levels should be the
same in each compressor and should be visible in the
sightglass. This is the best method to determine if the
system has sufficient oil.
Units overcharged with oil will operate with degraded
performance and could lead to compressor damage.
Operating Envelope
The compressor must be operated within the published
operating envelope.

Figure 11. Operating envelope
R410A Operating Map - Superheat 20F
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
-30 -20 -10 0 10 20 30 40 50 60 70
Evaporating temperature (°F)
Condensing temperature (°F)
R410A Operating Map - Superheat 20F
General Information
18 PART-SVN234B-EN
Refrigerant Type
Start to Finish™ compressors are approved for use with
R-410A refrigerant only. Any use of hydrocarbon
refrigerants or air is strictly prohibited!
Transportation, Handling, and
Storage
The compressor must be handled in the vertical position
(maximum 15-degree offset from vertical). Should the
compressor be handled in an upside down position, its
suitability for its use can not be guaranteed.
NOTICE
Improper Handling!
Improper handling of the compressor resulting from
being handled or transported in the upside position,
dropped or tipped over could result in internal damage
to the compressor and it is recommended that the
compressor not be put into service.
Damage to compressor or packaging should be reported
to the shipper immediately.
Use a proper method of lifting the compressor, both lifting
ears must be used with a spreader bar.
WARNING
Heavy Objects!
Failure to follow instructions below or properly lift unit
could result in unit dropping and possibly crushing
operator/technician 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.
For approximate compressor weight, see Table 4, p. 19.

General Information
PART-SVN234B-EN 19
Spreader bar use is recommended to better balance the
compressor.
Figure 12. Lifting compressor with spreader bar
Use lifting hooks with close clasps.
Table 4. Compressor weight with full oil charge
Nominal Capacity Weight (lb)
090 128
109–121 142
145 148
156 152
181 155
182–183 234
240–241 238
300–301 337
360–361 362
The compressor and its packaging must not be exposed to
rain and/or corrosive, flammable atmosphere.
The compressor must not be stored in an environment
less than -31°F (-35°C) or to exceed +160°F (+71°C).
Pre-Installation Inspections
Check the following before using the compressor:
• Compressor for visible shipping damage.
• Compressor is the correct model/part number.
• Compressor is the correct voltage.
• Compressor ship-with items:
– Restrictors for use with tandem and trio
compressors.
– Oil equalizer Teflon®gaskets.
WARNING
R-410A Refrigerant under Higher Pressure
than R-22!
Failure to use proper equipment or components as
described below, could result in equipment failing and
possibly exploding, which could result in death, serious
injury, or equipment damage. The units described in this
manual use R-410A refrigerant which operates at higher
pressures than R-22. Use ONLY R-410A rated service
equipment or components with these units. For specific
handling concerns with R-410A, please contact your local
Ingersoll Rand representative.
Figure 13. Nominal capacity 182–361
Oil equalizer Rotolock
connection fitting
1/4 Schrader port
Oil drain valve
Sightglass
Figure 14. Nominal capacity 090–181
Oil equalizer Rotolock
connection fitting
1/4 Schrader port
Sightglass

Figure 15. Tandem and Trio
Oil equalizer Rotolock
connection fitting
Oil equalizer lines
TANDEM
TRIO
General Information
20 PART-SVN234B-EN
Repair Recommendations
WARNING
Hazard of Explosion and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury. 
Never solder, braze or weld on refrigerant lines or any
unit components that are above atmospheric pressure
or where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
Mechanical Failure
Replace only the failed compressor in a tandem or trio set.
Important: On tandem or trio assemblies, the suction
and discharge lines must NOT be modified,
except for the use of slip joint couplings.
Other modification may cause oil return
issues and lead to compressor failure. Cut
the lines in a convenient place, remove the
compressor, and then unbraze the lines
from the compressor. On reinstallation,
reinstall lines to compressor and
reassemble the cut lines utilizing a slip
coupling. See Figure 16 for suggested area
to cut the discharge and suction line.
Figure 16. Suggested areas to cut refrigerant lines
Suggested area to cut the
refrigerant lines so that
they can be reinstalled
Minimize system and compressor open times to avoid
excessive moisture absorption by the POE oil. Maximum
suggested open time is 15 minutes.
Drain and replace oil in all the non-failed compressors.
Note: For 090–181 nomnial capacity compressors, this
requires removing oil using a suction device
through the oil equalizer Rotolock fitting (see
Figure 14, p. 19). Use a dedicated device for
removing oil. It is good practice to flush the suction
device with clean oil prior to use.
The 182–361 nominal capacity compressor has an oil drain
with a Schrader®valve that can be used to remove the oil
(see Figure 13, p. 19).
Replace unit liquid line filter-drier. This is a very important
part of controlling moisture in R-410A POE oil systems.
Reuse the compressors mounting isolators or mounting
spacers that are used with the existing compressor
assembly.
Braze the compressor into the system. Compressor
connections are copper-plated steel. Use BAg-28, 40%
silver, with paste flux to make the copper tube connections
to the compressor.