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)
The AHRI Certified mark indicates company participation in the AHRI Certification program. For verification of individual certified products, go to ahridirectory.org.
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

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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.)

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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.

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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.
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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
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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
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No. Name No. Name
1Return Air Connection 5 Air Supply Outlet
2 Flexible Connection 6 Transition Connection
3Return Air Louver 7 Air Supply Connection
4 Hanger 8 Di󰀨user
Installation with Round Connections
1
2
4
3
5 6 7
8
• Pre-install the outlet of the round duct on the transition connection and tighten it with a
tapping screw.
• Place the transition connection to the air outlet of the unit and attach it with a rivet.
• Connect the outlet to the short duct and secure them with tape.
CAUTION
This unit is intended for free-air discharge or for connections supplying only one room.
improper installation could contribute to the spread of smoke or ames in the event of a re.
NOTICE
The maximum length of the duct connections means the maximum length of the air supply
duct plus the maximum length of the return air duct and cannot exceed 3.3 ft. (1m)
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Dimensions of the Air Supply Outlet and Return Air Inlet
21
A
B
D
C
Air Supply Outlet Return Air Inlet
Models Air Supply Outlet Return Air Inlet
A B C D
4MXD8509A 6.1
(156)
26.1
(662)
22.8
(580)
6.4
(162)
4MXD8512A
4MXD8518A 6.1
(156)
33.9
(862)
30.7
(780)
6.4
(162)
4MXD8521A 6.1
(156)
41.8
(1062)
38.6
(980)
6.4
(162)
4MXD8524A
Unit: Inch (mm)
Installation of the Return Air Connection
Return Air Cover Plate
Downward Return Air
Backward Return Air
Rectangular Flange
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1. The default installation location of the rectangular ange is in the back and the return air cover
plate is in the bottom.
2. If downward return air is desired, exchange the location of the rectangular ange and the
return air cover plate.
3. Connect one end of the return air duct to the return air outlet of the unit by rivets and the other
to the return air louver. For convenience you may adjust the height with a section of exible
connection material.
4. More noise is likely to be produced in the downward return air mode than the backward return
air mode. It is suggested to install sound insulation and a plenum box to minimize the noise.
5. The installation method can be chosen when considering the installation location available in
the building and maintenance access, etc.

1
Air supply
Return air
Install the return air pipe (a)
Air supply
Install the return air pipe(b)
Return air
1
2
4
5
3
64
5
Parts and Components of the Return Air Connection
No. Name No. Name
1 Return Air Louver (with Filter Screen) 4 Indoor Unit
2 Flexible Connection 5 Air Supply Connection
3Return Air Connection 6 Access Grille
Installation of the Condensate Pipe
Insulating Layer for the Condensate Pipe
Pipe Lip
Thermal Insulation of the Condensate Pipe
CAUTION
Seal properly and verify there is no water leakage from the joint of the condensate pipe.
Failure to do so may result in equipment and/or property damage.
1. The condensate pipe should keep a downward sloping angle of 5~10°, which can facilitate
drainage of the condensate water. The joints of the condensate pipe should be insulated
with insulation material to prevent condensation.
2. There is a condensate outlet on both the left and right sides of the unit. Once the proper
drain position is determined, the unused location should be sealed by a rubber plug. Be sure
to secure with a clamp and insulate completely to avoid condensate build-up.
3. The outlet on the right side of the unit is sealed by default.
Insulation of the Condensate Pipe
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Design of the Drain Pipe
1. The drain pipe should always keep a downward sloping angle of 5~10° to avoid water
accumulation or improper drainage which could lead to equipment and/or property damage.
2. When connecting the drain pipe to the unit, avoid excessive force on the connection. The pipe
should be as close to the unit as possible.
3. The drain pipe can be ordinary hard PVC pipe which can be purchased locally. During the
connection, insert the end of the PVC pipe to the drain outlet, then tighten it to the drain hose
with a hose clamp. Do not connect the drain outlet and the drain hose with an adhesive.
4. When the drain pipe is used for multiple units, the joined section of the pipe should be 3.9
inches (100mm) lower than the drain hole of each device and it is suggested to use a larger
diameter pipe when connecting multiple units.
Installation of the Drain Pipe
1. The diameter of the drain pipe should be greater than or equal to that of the refrigerant pipe.
(PVC pipe, outer diameter : 1 inch (25mm), wall thickness ≥0.05 inches (1.5mm).
2. The drain pipe should be as short as possible and with at least a 1/100 degree of slope to
avoid forming air pockets.
3. If the proper degree of slope of the drain pipe is not feasible, a lift bracket should be installed.
4. A distance of 39.4 to 59 inches (1 to 1.5m) should be kept between the hangers to avoid the
drain hose sagging or bending
1~1.5m
39.4-59 inch
CORRECT
INCORRECT with sagging and bending of pipe
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5. Insert the drain hose into the drain hole and tighten it with clamps.
6. Insert the drain pipe into the opposite end of the drain hose and clamp securely. Do not use
adhesive at this joint
7. Wrap the clamps with a large amount of foam wrap for thermal insulation to prevent
condensation and water damage.
Clamp (accessory)
Foam wrap Drain Hose
Foam wrap (accessory)
Clamp
(accessory)
Max. 4mm
0.16 inch
Precautions for the Drain Pipe
The installation height of the lift pipe should be less than 33.5 inches (850mm). It is
recommended to set an inclination angle of 1~2° for the lift pipe toward the drainage direction.
If the lift pipe and the unit form a right angle, the height of the lift pipe must be less than 31.5
inches (800mm).
1~1.5m (3.3 - 4.9 feets) Ceiling
Hanger Bracket
1° 2°
1000mm
850mm
300mm
150mm
Clamp (accessory)
Drain Hose (accessory)
Lift Pipe
11.8 inch
39.4 inch
33.5 inch
6 inch
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NOTES:
1. The connection height of the drain hose should be within 33.5 inches (850mm) so that the
outlet of the drain hose does not su󰀨er from external force.
2. If multiple drain pipes converge, please follow the installation diagrams below.
I - Joint of drain pipe
The specification of the joint of the drain pipe should be suitable to the running capacity of the unit
Drain Hose (accessory)
Max.75mm
Max.1000mm
Max.39.4 inch
Max.3 inch
Test the Drainage System
1. After the electrical installation, test the drainage system.
2. During the test, check to ensure the water ow goes through the pipe correctly and observe
the joint carefully to see if it leaks. If this unit is installed in a newly built house, it is suggested
to perform this test prior to the ceiling installation.
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mm(in)
Pipe Diameter Thickness of
Copper Tube
Tightening
Torque
Φ6.35 (.25) ≥0.8 (0.031) 15 ~ 30 N•m
Φ9.52 (.37) ≥0.8 (0.031) 35 ~ 40 N•m
Φ12.7 (.50) ≥0.8 (0.031) 45 ~ 50 N•m
Φ15.9 (.63) ≥1.0 (0.039) 60 ~ 65 N•m
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Ceiling Concealed Unit
Connecting the Pipe at the Indoor Unit
Detach the caps and plugs from the pipes.
NOTICE
1. Be sure to connect the pipe to the port on the indoor unit correctly. If the centering is
improper, the are nut cannot be tightened smoothly. If the are nut is forced to turn, the
threads will be damaged.
2. Do not remove the are nut until the connection pipe is to be connected so as to prevent dust
and impurities from coming into the pipe system.
Back-up Wrench
1. When connecting the pipe to the unit or removing it from the unit, please use both the spanner
and the torque wrench. See illustration below.
2. When connecting, smear both inside and outside of the are nut with refrigeration oil, tighten it
by hand and then tighten it with the spanner.
3. Refer to the table below before tightening to determine the appropriate torque (too tight would
damage the nut and lead to leakage).
4. Examine the connection pipe to see if it leaks, then apply the thermal insulation for the liquid
and gas lines, as shown below.
5. Use the medium-sized sponge wrap to insulate the coupler of the gas pipe and secure with
tape.

CAUTION
1. During the connection of the indoor unit and the refrigerant pipe, never pull any joints of
the indoor unit by force: otherwise the capillary pipe or other pipe may crack, which would
then result in leakage.
2. The refrigerant pipe should be supported by brackets, don't let the unit withstand the
weight of the drainage piping.
If the specication of the outdoor unit pipe joint does not conform to that of the indoor unit, then
the joint specication of the outlet pipe of the indoor unit takes precedence. A reducing nipple
shall be installed at the joint of the outdoor unit so as to make the joint of the outdoor unit
compatible with that of the indoor unit.
Installation of the Connection Pipe
Flare Processing
1. Cut the connection pipe with the pipe cutter and remove the burrs.
2. Hold the pipe downward to prevent cuttings from entering the pipe.
3. Remove the are nuts at the stop valve of the outdoor unit and inside the accessory bag of the
indoor unit, put them onto the connection pipe as shown below then are the connection pipe
with a aring tool.
4. Check if the are part is spread evenly and there are no cracks.
Bending Pipes
1. The pipes should be shaped by your hands. Be careful not to collapse them.
2. Do not bend the pipes in an angle more than 90°
3. When pipes are repeatedly bent or stretched, the material will harden, making it di󰀩cult to
bend or stretch them anymore. Do not bend or stretch the pipes more than three times.
18
Ceiling Concealed Unit

4. Do not bend the pipe while it is encased in the insulation. In this case cut the insulation with a
sharp cutter as shown below, and bend it after exposing the pipe. After bending the pipe as you
want, be sure to put the insulation back on the pipe, and secure it with tape.
NOTICE
1. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature
of 5.9 in. (150 mm) or more.
2. If the pipe is bent repeatedly at the same place, it will break.
CAUTION
Be sure to connect the gas pipe after connecting the liquid pipe completely.
Connecting the Pipe at the Outdoor Units
Tighten the are nut of the connection pipe at the outdoor unit valve connector. The tightening
method is the same as the method at the indoor unit.
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Ceiling Concealed Unit

Insulation of the Pipe Joints
1. The refrigerant pipe should be insulated with appropriate insulating material and
plastic tape in order to prevent condensation and water leakage.
2. The joints of the indoor unit should be wrapped with insulating material. No gap is
allowed on the joint of the indoor unit, as shown below.
WARNING
1. If the power cord or the signal line are damaged, they must be replaced with the required
replacement part.
2. Prior to wiring, please check the voltage marked on the nameplate and carry out the wiring
following the wiring diagram.
3. The dedicated power cord must be used for the air conditioning unit and the electrical
leakage protection switch and air switch must be installed in case of an overload condition.
4. The air conditioning unit must be grounded to prevent electrical shock hazards caused by
failed insulation.
5. All wiring should be done strictly in accordance with the wiring diagram, otherwise improper
wiring would cause abnormal operation or damage to the unit.
6. Do not let the electric wires touch the refrigerant pipe, the compressor, the fan or other
moving parts.
7. Do not modify the wiring inside the indoor unit, otherwise the manufacturer will not assume
any responsibility for damage or abnormal operation of the unit.
Wiring the Indoor Unit
1. Dismantle the cover of the electric box of the indoor unit.
2. Insert the power cord through the rubber ring.
3. Pull the 4-core cable through the hole of the chassis and the bottom of the appliance
upward, then connect the power line and the communication line from the outdoor unit to the
corresponding terminals N(1), 2, 3 and grounding terminal of the indoor unit. Wiring shall be
done properly as per the wiring diagram. (NOTE: Be sure the wiring terminals A/B/C/D and
piping ports A/B/C/D of the indoor unit match with that of the outdoor unit respectively).
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