Trane 22 Series Assembly instructions

Installer's Guide
Split System (R-410A)
22 Series Multi-Zone
Inverter System
18,000 Btu/h to 42,000 Btu/h
Model :
4TXM2218A12N
4TXM2221A13N
4TXM2224A14N
4TXM2230A15N
4TXM2236A15N
4TXM2242A15N
June 2020 MS-SVN049F-EN

WARNING
This equipment is to be serviced by professionally trained personnel
ONLY. Under NO circumstances should an unqualified person service
it. This equipment contains refrigerant under PRESSURE and operates
at HIGH VOLTAGE. Improperly installed, adjusted or altered equipment
by an unqualified person poses safety hazards including FIRE,
ELECTROCUTION, or EXPLOSION, which could result in death or serious
injury.
Warnings and Cautions
Warnings are provided to alert others of the potential hazards that could result
in severe personal injury or death, while cautions are designed to alert others
of the conditions that could result in minor or moderate injury.
Your personal safety and the proper operation of this machine depend upon
the strict observance of these precautions.
Attention: Warnings and Cautions appear at appropriate sections
throughout this literature. Read these carefully.
WARNING: Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not
avoided, could result in minor or moderate injury. It may also be used to
alert against unsafe practices.
NOTICE:Indicates a situation that could result in equipment or property
damage.
WARNING
Electrocution and Fire Hazards with Improperly Installed and Grounded
Field Wiring!
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
the National Electrical Codes (NEC) and your State and/or local electrical
codes. All field wiring MUST be performed by qualified personnel.
Failure to follow these requirements could result in death or serious
injury.

Warnings and Cautions
WARNING
R410-A Refrigerant under Higher Pressure than R-22!
The units described in this manual use R410-A refrigerant which operates at 50 to 70%
higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant
cylinders are painted with "pink" color to indicate the type of refrigerant and may contain a
"dip" tube to allow for charging of liquid refrigerant into the system. For specific handling
concerns with R-410A, please contact your local sales office.
Failure to use R-410A approved service equipment could result in standard equipment
exploding under R-410A higher pressure which could result in death or serious injury.
NOTICE
Use appropriate oil with R410A systems. Oil type is found at the bottom of Connection Pipe
Requirements table (included in the outdoor unit installation manual). R-410A systems
utilize POE (Polyolester) or PVE(Polyvinyl Ether) oil. Both oil types absorb moisture readily,
yet, lubrication properties vary. Do not leave the sealed system open to atmosphere except
during service for a short period of time. If the sealed system is left open longer than four
hours, the compressor oil must be changed. These systems utilize strainers placed before
and after the expansion device in the outdoor unit, if debris or moisture is suspected, these
strainers must be changed. Do not break a vacuum with air. Do not leak check the sealed
system with compressed air. Unless instructed by factory service representative, external
refrigeration driers are prohibited.
USE ONLY THE FACTORY RECOMMENDED OIL TYPE!
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 chlorofluorocarbons (CFC's) and those containing hydro-chlorofluorocarbons
(HCFC's). Not all refrigerants containing these compounds have the same potential impact to the environment. The
Company advocates the responsible handling of all refrigerants, including industry replacements for CFC's such as
HCFC's and HFC's.
Responsible Refrigerant Practices
The manufacturer 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.

Contents
Safety Precautions ...............................................................................................5
Pre-Installation Checklist .....................................................................................6
Product Introduction .............................................................................................7
Combinations for Outdoor and Indoor Units .........................................................7
Operating Ranges ................................................................................................9
Preparation for Installation..................................................................................10
Selecting the Installation Location......................................................................10
Connection Pipe Requirement............................................................................11
Refrigerant Piping Precautions...........................................................................12
Installing the Outdoor Unit..................................................................................13
Condensate Management of the Outdoor Unit...................................................13
Installing the Refrigerant Piping..........................................................................14
Flaring Process and Bending Pipes ...................................................................14
Insulating the Refrigerant Piping and Connections ............................................15
Refrigerant Piping at the Outdoor Unit ...............................................................16
Piping Requirements ..........................................................................................17
Refrigerant Piping Between the Indoor and Outdoor Units ................................18
Vacuum and Refrigerant Leakage Detection......................................................20
Wiring Precautions .............................................................................................21
Outdoor Wiring Connections ..............................................................................21
Stranded Wiring Connections.............................................................................22
Electrical Connections........................................................................................23
Power Supply Wiring...........................................................................................24
Cable Specifications and Grounding Requirements...........................................24
Installation of Controllers....................................................................................24
Post Installation Checklist ..................................................................................25
Refrigerant System Diagrams ............................................................................26
Electrical Connections at the Outdoor Unit ........................................................28
Wiring Diagrams .................................................................................................30
Dimensional Diagrams .......................................................................................33
Troubleshooting ..................................................................................................34
Error Codes ........................................................................................................36
Maintenance.......................................................................................................37
Parts Replacement .............................................................................................37
After-Sales Service.............................................................................................37

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22 Series Multi-Zone
WARNING This mark indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
This mark indicates a potentially hazardous situation which, if not avoided,
could result in minor or moderate injury. It may also be used to alert against
unsafe practices.
NOTICE This mark indicates a situation which could result in equipment and/or
property damage.
Safety Precautions
Your personal safety and the proper operation of this equipment depend upon the strict observance of
these precautions.
WARNING
1. Installation should performed by a qualified HVAC professional. Industry Standard Personal
Protective Equipment (PPE) and gear for height related safety should be worn during installation.
Improper personal safety precautions and installation may cause death or serious injury.
2. Install the air conditioner according to the instructions given in this manual. Incomplete installation
work may cause water leakage, electrical shock or fire.
3. Use the supplied or specified installation parts. Use of other parts may cause the unit to come
loose, resulting in water leakage, electrical shock or fire.
4. Install the unit in a location that can support the weight of the unit. An inadequate support
structure or incomplete installation may cause injury or property damage in the event the unit falls
off of the installation location. Refer to the installation specifications for additional requirements.
5. Electrical work should be carried out in accordance with the installation manual and local, state
and National Electric Code (NEC). Insufficient capacity or incomplete electrical work may cause
electrical shock or fire.
6. Use a dedicated power circuit. Never use a power supply shared by another appliance.
7. For wiring, use a cable that is long enough to cover the entire distance without splicing. Do not
use an extension cord. Do not put other loads on the power supply; use a dedicated power circuit.
Failure to do so may cause abnormal heat, electric shock or fire.
8. Use the specified types of wires for electrical connections between the indoor and outdoor units.
Firmly clamp the interconnecting wires so their terminals receive no external stresses. Incomplete
connections or clamping may cause terminal overheating or fire.
9. After joining the interconnecting and supply wiring, shape the cables so that they do not put undue
force on the electrical covers or panels. Install covers over the wires. Incomplete cover installation
may cause terminal overheating, electrical shock, or fire.
10. If any refrigerant leaks out during the installation, ventilate the room. The refrigerant produces a
toxic gas if exposed to flames.
11. When installing or relocating the system, keep the refrigerant circuit free from substances
other than the specified refrigerant (R410-A), such as air. The presence of air or other foreign
substances in the refrigerant circuit can cause an abnormal pressure rise or rupture, which could
result in injury and damage.

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22 Series Multi-Zone
12. If a system pump-down is performed, turn off the associated equipment and close service valves
prior to removing the refrigerant piping. Failure to do so will introduce non-condensables in the
system, causing abnormal pressure in the refrigeration cycle which could lead to injury and
damage.
13. Before system start-up, attach the refrigerant piping securely. Failure to do so will introduce non-
condensables into the system when the compressor is running, causing abnormal pressure in the
refrigeration cycle which could lead to injury and damage.
14. Establish a complete ground. Do not ground the unit to a utility pipe, arrester, or telephone ground.
An incomplete ground may cause electrical shock, or fire. A high surge current from lightning or
other sources may cause damage to the air conditioner.
15. If the power supply cable is damaged, it must be replaced by the manufacturer, its service agent
or another qualified professional in order to avoid electrical risk during and after replacement.
Pre-Installation Checklist
1. Unpack and inspect each unit.
2. Check for any damage to the unit.
3. Check the model numbers to ensure a proper match.
4. Check the unit nameplate to ensure the proper electrical requirements will be met.
5. Check the installation locations to ensure the weight of the units can be supported.
6. Check the refrigerant pipe sizes and ensure they have been or will be installed according to the
requirements in this manual.
7. Check the outdoor unit nameplate for electrical power supply and wiring requirements to ensure the
proper wiring has been installed prior to connection.
8. Check the indoor unit for coil leakage. The pressure relief valve on the gas pipe should release
pressurized nitrogen which ensures the unit has not leaked during shipping.
CAUTION
1. Do not install the unit in a place where there is danger of exposure to flammable gas leakage. If
gas leaks and builds up around the unit, it may result in fire.
2. After system installation is completed, make sure no refrigerant leakage is present.
3. This appliance is not intended for use by persons with a lack of experience and knowledge, unless
they have been given adequate supervision or instruction concerning use of the appliance by a
person responsible for their safety.
4. Children should be supervised to ensure that they do not play with the appliance.
NOTICE
1. Establish drain piping according to the instructions in this manual. Inadequate piping may cause
flooding.
2. Tighten the flare nut according to the specified method. If the flare nut is tightened too hard, the
flare nut may crack and cause refrigerant leakage.

Combinations for Outdoor and Indoor Units
No. 1 2 3 4 5
Name Motor Fan Electric Box Gas Valve Assembly Liquid Valve Assembly
MODEL 4TXM2218 4TXM2224 4TXM2230 4TXM2236 4TXM2242
Minimum number of connectable indoor units 2 2 2 2 2
Maximum number of connectable indoor units 2 3 4 4 5
Product Introduction
The 22 Series Multi-split system utilizes inverter compressor technology, which enables the outdoor unit to
send refrigerant to multiple indoor units of varying capacities. It is critical, however, that heat loss and heat
gain calculations be performed to properly size the multi-split system.
Primary Component Identification
The multi-split systems can operate with a combination ratio from 50% to 150%. This means that the total
combined nominal cooling capacity of the connected indoor units can be up to 1.5 times the nominal cooling
capacity of the outdoor unit.
Note: When the total capacity of the indoor units exceeds the total capacity of the outdoor unit, the system will
be restricted by the capacity of the outdoor unit. All indoor units would not be able to operate at full capacity at
the same time. If the indoor unit combined capacity is less than 100% of the outdoor units' capacity, the system
capacity is limited to the indoor unit(s) combined capacity.
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22 Series Multi-Zone

Indoor Unit Combinations with Associated Nominal Capacity (kBTUH)
Outdoor Unit # of
Ports Two Indoor Units
4TXM2218A12N0
18,000 BTUH 29+9 9+12 12+12
Outdoor Unit Two Indoor Units Three Indoor Units
4TXM2221A13N0
21,000 BTUH 39+9 9+18 12+12 9+9+9
9+12 9+21 12+18 9+9+12
Outdoor Unit Two Indoor Units Three Indoor Units Four Indoor Units
4TXM2224A14N0
24,000 BTUH 4
9+9 9+24 12+24 9+9+9 9+12+18 9+9+9+9
9+12 12+12 18+18 9+9+12 9+9+9+12
9+18 12+18 9+9+18
9+21 12+21 9+12+12
Outdoor Unit Two Indoor Units Three Indoor Units Four Indoor Units Five Indoor Units
4TXM2230A15N0
30,000 BTUH 5
9+9 12+12 18+21 9+9+9 9+12+12 12+12+18 9+9+9+9 9+9+12+18 9+9+9+9+9
9+12 12+18 18+24 9+9+12 9+12+18 12+12+21 9+9+9+12 9+12+12+12 9+9+9+9+12
9+18 12+21 21+21 9+9+18 9+12+21 12+12+24 9+9+9+18 12+12+12+12
9+21 12+24 21+24 9+9+21 9+12+24 18+18+9 9+9+9+21
9+24 18+18 24+24 9+9+24 12+12+12 12+18+18 9+9+12+12
Outdoor Unit Two Indoor Units Three Indoor Units Four Indoor Units Five Indoor Units
4TXM2236A15N0
36,000 BTUH 5
9+9 12+18 21+21 9+9+9 9+12+18 12+12+24 9+9+9+9 9+9+12+18 9+9+9+9+9
9+12 12+21 21+24 9+9+12 9+12+21 12+18+18 9+9+9+12 9+9+12+21 9+9+9+9+12
9+18 12+24 24+24 9+9+18 9+12+24 12+18+21 9+9+9+18 9+9+12+24 9+9+9+9+18
9+21 18+18 9+9+21 12+12+12 12+18+24 9+9+9+21 9+9+18+18 9+9+12+12+12
9-24 18+21 9+9+24 12+12+18 18+18+18 9+9+9+24 9+12+12+12
12+12 18+24 9+12+12 12+12+21 9+9+12+12 9+12+12+18
Outdoor Unit Two Indoor Units Three Indoor Units Four Indoor Units Five Indoor Units
4TXM2242A15N0
42,000 BTUH 5
9+12 24+24 9+9+9 12+18+18 9+9+9+9 9+12+12+12 9+9+9+9+9
9+18 9+9+12 12+18+21 9+9+9+12 9+12+12+18 9+9+9+9+12
9+21 9+9+18 12+18+24 9+9+9+18 9+12+12+21 9+9+9+9+18
9+24 9+9+21 18+18+18 9+9+9+21 9+12+12+24 9+9+9+9+21
12+12 9+9+24 18+18+21 9+9+9+24 9+12+18+18 9+9+9+9+24
12+18 9+12+12 18+18+24 9+9+12+12 9+12+18+21 9+9+9+12+12
12+21 9+12+18 18+21+21 9+9+12+18 9+12+18+24 9+9+9+12+18
12+24 9+12+21 9+9+12+21 12+12+12+12 9+9+9+12+21
18+18 9+12+24 9+9+12+24 12+12+12+18 9+9+12+12+12
18+21 12+12+12 9+9+18+18 12+12+12+21 9+9+12+12+18
18+24 12+12+18 9+9+18+21 12+12+12+24 9+12+12+12+12
21+21 12+12+21 9+9+18+24 12+12+18+18 12+12+12+12+12
21+24 12+12+24 9+9+21+21
22 SEER Ductless Multi-Zone Approved Combinations
Ductless Multi-Zone Quick Reference
Multi-Zone Heat Pumps Indoor Options
9,000 BTUH 12,000 BTUH 18,000 BTUH 21,000 BTUH 24,000 BTUH
High-Wall Mounted 4MXW2709A10N0 4MXW2712A10N0 4MXW2718A10N0 N/A 4MXW2724A10N0
Ceiling Concealed 4MXD8509A10N0 4MXD8512A10N0 4MXD8518A10N0 4MXD8521A10N0 4MXD8524A10N0
Cassette N/A 4MXC8512A10N0 4MXC8518A10N0 N/A 4MXC8524A10N0
Console 4MXF8509A10N0 4MXF8512A10N0 4MXF8518A10N0 N/A N/A
Floor/Ceiling 4MXX8509A10N0 4MXX8512A10N0 4MXX8518A10N0 N/A 4MXX8524A10N0
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22 Series Multi-Zone

High Efficiency High Wall
Indoor Unit
Ceiling Concealed
Indoor Unit
Cassette
Indoor Unit
Floor/Ceiling
Indoor Unit
Console
Indoor Unit
Some of the 22 SEER multi-split outdoor units are able to support up to five indoor units. The figure below
illustrates that a mixture of indoor types may be used on a single 4TXM22 multi port system, provided the
combination is approved. Please reference the multi-zone approved combinations matrix on page 8.
Indoor Unit Model Capacity (BTUh) Outdoor Unit
High Efficiency High Wall
4MXW2709A10N 9,000
4TXM2218A12N
4TXM2221A13N
4TXM2224A14N
4TXM2230A15N
4TXM2236A15N
4TXM2242A15N
4MXW2712A10N 12,000
4MXW2718A10N 18,000
4MXW2724A10N 24,000
Floor/Ceiling
4MXX8509A10N 9,000
4MXX8512A10N 12,000
4MXX8518A10N 18,000
4MXX8524A10N 24,000
Ceiling Concealed
4MXD8509A10N 9,000
4MXD8512A10N 12,000
4MXD8518A10N 18,000
4MXD8521A10N 21,000
4MXD8524A10N 24,000
Cassette
4MXC8512A10N 12,000
4MXC8518A10N 18,000
4MXC8524A10N 24,000
Console
4MXF8509A10N 9,000
4MXF8512A10N 12,000
4MXF8518A10N 18,000
Operating Ranges
Cooling Operating Range Outdoor Temperature 0 - 118°F (-18.0 - 48°C)
Heating Operating Range 18K-24K Units Outdoor Temperature -4.0 - 75°F (-20 - 24°C)
Heating Operating Range 24K-42K Units Outdoor Temperature -4.0 - 86°F (-20 - 30°C)
Combinations for Outdoor and Indoor Units
When the total capacity of the indoor units exceeds the total capacity of the outdoor unit, the system will be
restricted by the capacity of the outdoor unit. All indoor units would not be able to operate at full capacity
at the same time. If the indoor unit combined capacity is less than 100% of the outdoor units' capacity, the
system capacity is limited to the indoor unit(s) combined capacity.
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22 Series Multi-Zone

Preparation for Installation
valve cover
Space to the wall
12 in. or more
20 in. or more
20 in. or more
12 in. or more
or more.ni
97
Space to the obstruction
Air outlet side
Space to the wall
Air inlet side
Outdoor Unit
1. Select a location where equipment noise and air discharge annoyance is minimized.
2. Select a location where there is sufficient ventilation.
3. Make sure the air inlet and outlet are not blocked by any obstacles
4. Select a location capable of supporting four times the weight of the unit, that will not increase vibration,
and where installation work can be carried out safely.
5. Select a location away from flammable gas or gas leaks.
6. Ensure installation of the outdoor unit conforms to the clearance specifications in this manual.
7. Locate the outdoor unit away from any bedroom windows.
NOTICE
Installing the unit in one of the following locations could result in unit malfunction:
1. Places where oil (machine oil) is used.
2. Seaside places with high levels of salt in the air.
3. Places with high levels of sulphur gas such as areas with hot springs.
4. Places where high-frequency waves are generated by radio equipment, welders and medical equipment.
5. Other unusual places where unit operation may be altered.
6. Places where minimum clearances cannot be met.
WARNING
1. Install the unit on a level surface or on supports that are level.
2. If the location is subject to strong winds, the additional force must be accounted for
and the unit must be fixed securely to the base. Refer to local codes for additional
requirements.
Selecting the Installation Location
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22 Series Multi-Zone