Trane American Standard 4MXD8509A10N0 User guide

CONFORMSTO ULSTD.1995 CERTIFIEDTO CSASTD.C22.2 N0.236
3097844
About Trane and American Standard Heating and Air Conditioning Trane and American Standard create comfortable, energy efficient indoor environments for residential applications. For more information, please visit www.trane.com or www.americanstan- dardair.com
The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
© 2020
MS-SVN34D-EN 11 Jun 2020 Supersedes MS-SVN34C-EN (January 2016)
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Installer’s Manual
Split System (R-410A)
Air Handler for Multi-Split Inverter System 9,000 Btu/h to 24,000 Btu/h
Ceiling Concealed Type Models:
4MXD8509A10N0 4MXD8512A10N0 4MXD8518A10N0 4MXD8521A10N0 4MXD8524A10N0
June 2020 MS-SVN34D-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 and Cautions. Warnings are provided to alert installing
contractors to potential hazards that could result in personal injury or
death, while cautions are designed to alert personnel to conditions that
could result in equipment damage.
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 only accidents.
WARNING
Electrocution and Fire Hazards with Improperly Installed and Grounded
Field Wiring!
Improperly installed and grounded field wiring poses FIRE &
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 local/state 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
R-410A Refrigerant under Higher Pressure than R-22!
The units described in this manual uses 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 PVE Oil with R-410A Mini Split Units!
Most R-410A mini-splits use a PVE oil (Polyvinyl Ether Oil) that readily absorbs moisture
from the atmosphere.To limit this "hygroscopic" action, the system should remain sealed
whenever possible. If a system has been open to the atmosphere for more than 4 hours,
the compressor oil must be replaced. Never break a vacuum with air and always change
the driers when opening the system for component replacement. For specific handling
concerns with the PVE oil, contact your local sales office.
USE ONLY THE FACTORY RECOMMENDED - DAFNE HERMETIC OIL FV50S - for servicing
these units.
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
hydrochlorofluorocarbons (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
Operating and Working Temperature Ranges ........................................................................... 6
Clearance Requirements........................................................................................................... 7
Installation Location................................................................................................................... 8
Installing the Indoor Unit............................................................................................................ 9
Levelling the Indoor Unit.......................................................................................................... 10
Installation with Air Supply Connections.................................................................................. 10
Dimensions of the Air Supply Outlet and Return Air Outlet ..................................................... 12
Installation of the Return Air Connection ................................................................................. 12
Parts and Components of the Return Air Connection ............................................................. 13
Installation of the Condensate Pipe......................................................................................... 14
Insulation of the Drain Pipe ..................................................................................................... 14
Design of the Drain Pipe.......................................................................................................... 14
Precautions for the Drain Pipe................................................................................................. 15
Test the Drainage System ....................................................................................................... 16
Connecting the Pipe at the Indoor Unit.................................................................................... 17
Installation of the Connection Pipe.......................................................................................... 18
Flare Processing...................................................................................................................... 18
Bending Pipes ......................................................................................................................... 18
Connecting the Pipe at the Outdoor Units............................................................................... 19
Insulation of the Pipe Joints..................................................................................................... 20
Wiring the Indoor Unit.............................................................................................................. 20
Stranded Wiring....................................................................................................................... 21
Electrical Wiring....................................................................................................................... 22
Wiring Precautions .................................................................................................................. 22
Electrical Cable Connection .................................................................................................... 22
Grounding Requirements ........................................................................................................ 23
Installation of Controllers......................................................................................................... 23
Installation Checklist ............................................................................................................... 24
Test Operation ......................................................................................................................... 24
Wiring Diagrams...................................................................................................................... 25
Indoor Unit Dimensions ........................................................................................................... 26
Troubleshooting....................................................................................................................... 27
General Maintenance .............................................................................................................. 28
After Sales Service.................................................................................................................. 28

5
Ceiling Concealed Unit
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
Warnings, Cautions and Notices: Warnings, cautions and notices appear at appropriate intervals throughout
this manual. Warnings are provided to alert installing contractors to potential hazards that could result in
serious injury or death. Cautions are designed to alert personnel to conditions that could result in minor to
moderate injury. Notices alert to the possibility of equipment and/or property damage.
Your personal safety and the proper operation of this machine depend upon the strict observance of these
precautions.
WARNING
1. Installation should be left to the dealer or another professional. Improper installation may cause
water leakage, electrical shock or re.
2. Install the air conditioner according to the instructions given in this manual. Incomplete installation
work may cause water leakage, electrical shock or re.
3. Be sure to use the supplied or specied installation parts. Use of other parts may cause the unit to
come loose, resulting in water leakage, electrical shock or re.
4. Install the air conditioner on a solid base that can support the weight of the unit. An inadequate
base or incomplete installation may cause injury or property damage in the event the unit falls o󰀨
of the base.
5. Electrical work should be carried out in accordance with the installation manual and local, state
and National Electric Code (NEC). Insu󰀩cient capacity or incomplete electrical work may cause
electrical shock or re.
6. Be sure to 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 a splice. 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 re.)
8. Use the specied 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 re.
9. After connecting the interconnecting and supply wiring, be sure to 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 re.
10. After all installation is complete, check to make sure that there is no refrigerant leakage.
11. If any refrigerant has leaked out during the installation work, ventilate the room. (The refrigerant
produces a toxic gas if exposed to ames.)
12. When installing or relocating the system, be sure to keep the refrigerant circuit free from
substances other than the specied refrigerant (R410-A), such as air. (Any presence of air or
other foreign substance in the refrigerant circuit can cause an abnormal pressure rise or rupture,
resulting in injury.)

6
Ceiling Concealed Unit
13. During pump-down, stop the compressor before removing the refrigerant piping. If the compressor
is still running and the stop valve is open during pump-down, air will be sucked in when the
refrigerant piping is removed, causing abnormal pressure in the refrigerant cycle which could lead
to breakage and even injury.
14. During installation, attach the refrigerant piping securely before running the compressor. If the
compressor is not attached and the stop valve is open during pump-down, air will be sucked in
when the compressor is run, causing abnormal pressure in the refrigerant cycle which could lead
to breakage and even injury.
15. Be sure to establish a ground. Do not ground the unit to a utility pipe, arrester, or telephone
ground. Incomplete ground may cause electrical shock, or re. A high surge current from lightning
or other sources may cause damage to the air conditioner.
16. Be sure to follow your local, state and National Electric Codes when grounding this unit.
17. This appliance is not intended for use by persons with a lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety.
18. Children should be supervised to ensure that they do not play with the appliance.
19. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualied persons in order to avoid electrical risk during and after replacement.
CAUTION
Do not install the air conditioner in a place where there is danger of exposure to ammable gas
leakage. If gas leaks and builds up around the unit, it may result in re.
NOTICE
1. Establish drain piping according to the instructions in this manual. Inadequate piping may cause
ooding.
2. Tighten the are nut according to the specied method such as with a torque wrench. If the are
nut is tightened too hard, the are nut may crack and cause refrigerant leakage.

7
Ceiling Concealed Unit
Clearance Requirements
23.6” (600mm)
(150mm)
23.6” (600mm)
Air outle t
Air inlet
inspection
opening
5.9”
Nut with
washer
500 mm 250 mm
Spring
pad
>19.7 inch >9.8 inch
NOTE: Be sure to place an inspection/service opening at the position indicated in the diagram above
for maintenance of the equipment.
Indoor Ceiling Concealed Unit
NOTE: The minimum distance from the oor to the bottom of the unit is 5.6 feet (1.7m).
The maximum distance from the oor to the bottom of the unit is 13 feet (4m) for adequate com-
fort control.

WARNING
1. Adequate Support Required!
2. The wall/ceiling structure must be adequate to support the weight of the unit. Failure to
ensure adequate structural support could result in the unit falling from its location which
could result in death, serious injury, or equipment or property-only damage.
8
Ceiling Concealed Unit
1. Avoid locating the indoor unit where the return and/or supply air may be obstructed
2. Select a location where it is easy to drain the condensing water and connect to the outdoor unit
3. Keep the indoor unit far away from heat sources, vapor and flammable gas
4. Be sure that the installation of the indoor unit conforms to the installation dimension diagram
5. Be sure to leave enough space to allow access for routine maintenance; clearance between the
bottom of the indoor unit and the floor should not be less than 66"
6. Install in a location where the unit is more than 3 feet away from other electronic appliances such
as television, audio devices, etc.
7. Select a location where air filters can be easily removed and replaced
Installation Location
Indoor Unit
For instructions on installing the outdoor unit please refer to the installation guide
supplied with the selected outdoor unit for your application.

Installing the Indoor Unit
9
Ceiling Concealed Unit
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures recommended in this section of the
manual could result in exposure to electrical, mechanical or other potential safety
hazards. Always refer to the safety warnings provided throughout this manual
concerning these procedures. When possible, 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 qualied licensed electrician or other individual who has been trained in handling live
electrical components perform these tasks. Failure to follow all of the recommended
safety warnings provided, could result in death or serious injury.
Mounting Location
1. Conrm the mounting location with the customer. Keep in mind the guidelines for a
safe installation location on page 8.
2. Ensure the hanging point is strong enough to support 4 times the weight of the unit.
3. The weight of the unit should be shared equally by the expansion bolts.
4. Insert the M10 (or larger) expansion bolts into the hole and knock the nail into the
bolt Refer to the outline dimension drawings for the distance between holes.
5. Insert the hanger on the indoor unit as shown below.
6. Install the indoor unit on the ceiling support bolts.
Air conditioning unit
Hanger bolt
Anchor
48mm
2 inch

Leveling the Indoor Unit
• If there is an opening in the ceiling, it should be reinforced to keep it at and prevent vibration.
• If the support structure of the ceiling is not strong enough, a beam made of angle iron can be
used to mount the unit to for added support.
• If the indoor unit is not installed in an air conditioned area, please insulate around the unit
to prevent condensation. The thickness of the insulation depends on the actual installation
environment.
After installation of the indoor unit, the leveling must be checked to make sure the unit is kept
horizontal fore and aft and a downward slope of 5° is kept toward the drain pipe left and right as
shown below.
Installation with Air Supply Connections
4 6 83 75
1
2
3
Return air Supply air Return air
No. Name No. Name
1 Hanger 5 Plenum Box
2Return Air Connection 6 Filter Screen
3 Flexible Connection 7 Main Air Supply Connection
4Return Air Outlet 8 Air Supply Outlet
Check with a level.
Installation with Rectangular Connections
10
Ceiling Concealed Unit