Cooper & Hunter CH-M18AHU Repair manual

IMPORTANT NOTE:
Read this manual carefully before installing
or operang your new air condioning
unit. Make sure to save this manual for
future reference.
AIR-HANDLER AIR CONDITIONERS
Owner’s Manual &
Installation Manual
MODELS:
CH-M18AHU
CH-M24AHU

Indoor Unit Parts And Major Functions .............................................08
Owner’s Manual
Table of Contents
Safety Precautions ............................................................................04
Care and Maintenance...................................................................10
Troubleshooting..............................................................................12
1. Unit Parts..............................................................................................................................................08
2. Operang Condions............................................................................................................................08
3. Features ................................................................................................................................................09
4. Energy Saving Tips.................................................................................................................................09

Installation Manual
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Accessories
Indoor Unit Installation
1. Indoor Unit Parts
2. Safety Precauons
3. Indoor Unit Installaon Instrucons
4. Installaon of Electric Auxiliary Heat Module
Outdoor Unit Installation
1. Select installaon locaon
2. Install drain joint
3. Anchor outdoor unit
Drainpipe Installation
1. NOTE ON PURCHASING PIPES
2. Indoor Drainpipe Installaon
Refrigerant Piping Connection
1. Safety Precauons
2. Notes On Pipe Length and Elevaon
3. Connecon Instrucons Refrigerant Piping
Wiring
1. Outdoor Uint Wiring
2. Indoor Uint Wiring
3. Specific wiring method
4. Control Logic
5. LED DISPLAY
6. DIP Switch Definions
Air Evacuation
1. Evacuaon Instrucons
2. Note on Adding Refrigerant
Test Run
1. Before Test Run
2. Test Run Instrucons

Read Safety Precautions Before Operation and Installation
The seriousness of potenal damage or injuries is classified as either a WARNING or CAUTION.
Incorrect installation due to ignoring instructions can cause serious damage or injury.
WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
This appliance is not intended for use by persons(including children) with reduced physical, sensory
or mental capabilies, or lack of experience and knowledge, unless they have been given supervision
or instrucon concerning use of the appliance by a person responsible for their safety. Children
should be supervised to ensure that they do not play with the appliance.
physical, sensory or mental capabilies or lack of experience and knowledge if they have been given
supervision or instrucon concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
WARNINGS FOR PRODUCT USE
•
If an abnormal situaon arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instrucons to avoid electric shock, fire or injury.
•
Do not
insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotang at high speeds.
•
Do not
use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combuson.
•
Do not
operate the air condioner in places near or around combusble gases. Emied gas may
collect around the unit and cause explosion.
•
Do not
•
•
Do not
expose your body directly to cool air for a prolonged period of me.
•
•
•
If the air condioner is used together with burners or other heang devices, thoroughly venlate
the room to avoid oxygen deficiency.
Safety Precautions
Do not
allow children to play with the air condioner. Children must be supervised around the
unit at all mes.
operate your air condioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
In certain funconal environments, such as kitchens, server rooms, etc., the use of specially
designed air-condioning units is highly recommended.
Improper installaon, adjustment, alteraon, service or maintenance can cause property damage,
personal injury or loss of life. Installaon and service must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the gas supplier.
WARNING
This symbol indicates the possibility
of personnel injury or loss of life.
CAUTION
This symbol indicates the possibility of
property damage or serious consequences.
Safety
Precautions
 Page 4

CAUTION
• Turn off the air condioner and disconnect the power if you are not going to use it for a long me.
• Turn off and unplug the unit during storms.
• Make sure that water condensaon can drain unhindered from the unit.
• Do not operate the air condioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
•
•
Do not allow the air condioner to operate for long periods of me with doors or windows open,
or if the humidity is very high.
ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer , its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause fire or electric shock.
•
•
•
•
•
•
•
Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
Do not modify the length of the power supply cord or use an extension cord to power the unit.
Do not share the electrical outlet with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
If connecng power to fixed wiring, an all-pole disconnecon device which has at least 3mm
clearances in all poles, and have a leakage current that may exceed 10mA, the residual current
device(RCD) having a rated residual operang current not exceeding 30mA, and disconnecon
must be incorporated in the fixed wiring in accordance with the wiring rules.
For all electrical work, follow all local and naonal wiring standards, regulaons, and the
Installaon Manual. Connect cables ghtly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connecons can overheat and cause fire, and may
also cause shock.
All electrical connecons must be made according to the Electrical Connecon
Diagram located on the panels of the indoor and outdoor units.
All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connecon
points on the terminal to heat up, catch fire, or cause electrical shock.
The product must be properly grounded at the me of installaon, or electrical shock may occur.
TAKE NOTE OF FUSE SPECIFICATIONS
The air condioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protecon.
The specificaons of the fuse are printed on the circuit board ,examples of such are T5A/250VAC and
T10A/250VAC.
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and wear gloves and protecve clothing.
Safety
Precautions
 Page 5
• Do not
clean the air condioner with combusble cleaning agents. Combusble cleaning agents
can cause fire or deformaon.
CLEANING AND MAINTENANCE WARNINGS
• Turn off the device and disconnect the power before cleaning. Failure to do so can cause electrical
shock.
• Do not
clean the air condioner with excessive amounts of water.

Note
MODEL
PRESSURE
The allowed static pressure range of the air condioner on site is 0-200Pa.
Test static pressure
12-24K
25Pa 37Pa 50Pa
30-36K 48-60K
Safety
Precautions
 Page 6
WARNINGS FOR PRODUCT INSTALLATION
1. Installaon must be performed by an authorized dealer or specialist. Defecve installaon can
Excessive Weight Hazard - Use two or more people when moving and installing the unit. Failure
to do so can result in back or other type of injury.
cause water leakage, electrical shock, or fire.
2. Installaon must be performed according to the installaon instrucons. Improper installaon
can cause water leakage, electrical shock, or fire.
(In North America,installaon must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3.
Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with naonal wiring regulaons.
4.
Only use the included accessories, parts, and specified parts for installaon. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
5.
6.
Install the unit in a firm locaon that can support the unit’s weight. If the chosen locaon cannot
support the unit’s weight, or the installaon is not done properly, the unit may drop and cause
serious injury and damage.
7.
8.
9.
10.
11.
12.
Do not turn on the power unl all work has been completed.
When moving or relocang the air condioner, consult experienced service technicians for
disconnecon and reinstallaon of the unit.
How to install the appliance to its support, please read the informaon for details in "indoor unit
installaon" and "outdoor unit installaon" secons .
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combusble materials.
Do not install the unit in a locaon that may be exposed to combusble gas leaks. If combusble
gas accumulates around the unit, it may cause fire.
Install drainage piping according to the instrucons in this manual. Improper drainage may
cause water damage to your home and property.
Note about Fluorinated Gasses(Not applicable to the unit using R290 Refrigerant)
1.
This air-condioning unit contains fluorinated greenhouse gasses. For specific informaon on the
type of gas and the amount, please refer to the relevant label on the unit itself or
the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European Union
products only)
.
2. Installaon, service, maintenance and repair of this unit must be performed by a cerfied
technician.
3. Product uninstallaon and recycling must be performed by a cerfied technician.
4. For equipment that contains fluorinated greenhouse gases in quanes of 5 tonnes of CO2
equivalent or more, but of less than 50 tonnes of CO2equivalent, If the system has a leak-
detecon system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

Disposal Guidelines
This appliance contains refrigerant and other potenally hazardous materials. When disposing of
this appliance, the law requires special collecon and treatment. Do not dispose of this product as
household waste or unsorted municipal waste.
When disposing of this appliance, you have the following opons:
• Dispose of the appliance at designated municipal electronic waste collecon facility.
• When buying a new appliance, the retailer will take back the old appliance free of charge.
• The manufacturer will take back the old appliance free of charge.
• Sell the appliance to cerfied scrap metal dealers.
Special notice
Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad
for the environment. Hazardous substances may leak into the ground water and enter the food chain.
Correct Disposal of This Product
(Waste Electrical & Electronic Equipment)
This marking shown on the product or its literature, indicates that waste electrical and
eletrical equipment should not be mixed with general household waste.
Safety
Precautions
 Page 7

NOTE: Room relave humidity less than 80%. If the air condioner operates in excess of this
figure, the surface of the air condioner may aract condensaon. Please sets the vercal air
flow louver to its maximum angle (vercally to the floor), and set HIGH fan mode.
Room
Temperature 62°F-90°F(17°C-32°C ) 32°F-86°F
(0°C-30°C) 50°F-90°F (10°C-32°C)
Outdoor
Temperature
64°F-109°F (18°C-43°C)
19°F-75°F
(-7°C-24°C )
52°F-109°F (11°C-43°C)
19°F-109°F (-7°C-43°C)
(For models with low-temp cooling systems) 64°F-109°F (18°C-43°C)
64°F-126°F (18°C-52°C)
(For special tropical models) 64°F-126°F (18°C-52°C) (For special tropical models)
COOL mode HEAT mode DRY mode
COOL mode HEAT mode DRY mode
Room Temperature (17°C - 32°C)
62°F - 90°F 32°F - 86°F
(0°C - 30°C)
50°F - 90°F
(10°C - 32°C)
Outdoor
Temperature
32°F - 122°F
(0°C - 50°C)
5°F - 75°F
(-15°C - 24°C)
32°F - 122°F
(0°C - 50°C)
32°F - 126°F
(0°C - 52°C)
(For special
tropical models)
32°F - 126°F
(0°C - 52°C)
(For special
tropical models)
5°F - 122°F
(-15°C - 50°C)
(For models with
low temp. cooling
systems.)
Indoor Unit Parts And Major Functions
Unit Parts Operating Conditions
Use the system under the following temperatures for safe and
effecve operaon. If the air condioner is used under different
condions, it may malfuncon or become less efficient.
Air outlet
Air inlet
FOR OUTDOOR UNITS WITH AUXILIARY ELECTRIC HEATER
Inverter Split Type
When outside temperature is below 32°F(0°C), we strongly
recommend keeping the unit plugged in at all me to ensure
smooth on going performance.
Fixed-speed Type
Indoor Unit
Parts And
Major Functions
 Page 8

To further optimize the performance of your unit, do the following:
• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF funcons.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.
Energy Saving Tips
• DO NOT set the unit to excessive temperature levels.
• While cooling, close the curtains to avoid direct sunlight.
• Doors and windows should be kept closed to keep cool or warm air in the room.
• DO NOT place objects near the air inlet and outlet of the unit.
• Clean the air filter every two weeks.
• Adjust louvers properly and avoid direct airflow.
Features
Refrigerant Leak Detection System
(some models)
In the event of a refrigerant leak, the LCD screen
will display “EL0C” and the LED indicator light will
flash.
Closing curtains during heating also
helps keep the heat in
Doors and windows should be kept
closed
Indoor Unit
Parts And
Major Functions
NOTE:
1. Under normal working condions, the switch,
wind speed and temperature can not be adjusted
by remote control.
2. Requirements of wire controller:
Control AXU funcon for live heang
The default temperature of the first power-on is
set to 16 degrees for refrigeraon and 30 degrees
for heang. When the temperature stops, the
temperature is set at the room temperature at that
me.
 Page 9

Care and Maintenance
If using a vacuum cleaner,
the inlet side should face
the vacuum.
If using water, the inlet side
should face down and away
from the water stream.
Air filter
cover plate
Air filter
Care and
Maintenance
 Page 10
BEFORE CLEANING OR
MAINTENANCE
ALWAYS TURN OFF YOUR AIR CONDITIONER
SYSTEM AND DISCONNECT ITS POWER SUPPLY
BEFORE CLEANING OR MAINTENANCE.
CAUTION
Only use a so, dry cloth to wipe the unit clean.
If the unit is especially dirty, you can use a cloth
soaked in warm water to wipe it clean.
• Do not use chemicals or chemically treated
cloths to clean the unit
• Do not use benzene, paint thinner, polishing
powder or other solvents to clean the unit.
They can cause the plasc surface to crack
or deform.
•
•
Do not use water hoer than 104°F (40°C)
to clean the front panel. This can cause the
panel to deform or become discolored.
DO NOT wash the unit under running water.
Doing so creates an electrical hazard.
Clean the unit using a damp, lint-free cloth
and neutral detergent. Dry the unit with a
dry, lint-free cloth.
• Contact an authorized service technician for
repair or maintenance. Improper repair and
maintenance may cause water leakage,
electrical shock, or fire, and may void your
warranty.
• DO NOT substute a blown fuse with a
higher or lower amperage rang fuse, as this
may cause circuit damage or an electrical fire.
• Make sure the drain hose is set up according
to the instrucons. Failure to do so could
cause leakage and result in personal property
damage, fire and electric shock.
• Make sure that all wires are connected
properly. Failure to connect wires according
to instrucons can result in electrical shock
or fire.
Cleaning Your Indoor Unit
2. Remove the air filter.
3. Clean the air filter by vacuuming the surface or
washing it in warm water with mild detergent.
1. Remove filter cover plate.
How To Clean The Air Filter
The filter prevents dust and other parcles from
entering the indoor unit. Dust buildup can reduce
the efficiency of the air condioner. For opmum
efficiency, clean the air filter every two weeks or
more frequently if you live in a dusty area.
Replace the filter with a new one if it’s heavily
clogged and cannot be cleaned.
NOTE: In households with animals, you will have
to periodically wipe down the grille to prevent
animal hair blocking airflow.
This product filter is only used for energy efficiency
sampling test, the user needs to use a filter that
meets the requirements of UL900.
WARNING: DO NOT REMOVE OR
CLEAN THE FILTER BY YOURSELF
Removing and cleaning the filter can be dangerous.
Removal and maintenance must be performed by
a cerfied technician.

Maintenance –
Long Periods of Non-Use
If you plan not to use your air condioner for an
extended period of me, do the following:
Clean all filters Turn on FAN funcon unl
unit dries out completely
Turn off the unit and
disconnect the power
Maintenance –
Pre-Season Inspection
Aer long periods of non-use, or before periods
of frequent use, do the following:
Check for damaged wires Clean all filters
Check for leaks
Make sure nothing is blocking all air inlets and outlets
CAUTION
• Before changing the filter or cleaning,
turn off the unit and disconnect its power
supply.
• When removing filter, do not touch metal
parts in the unit. The sharp metal edges can
cut you.
• Do not use water to clean the inside of the
indoor unit. This can destroy insulaon and
cause electrical shock.
• Do not expose filter to direct sunlight when
drying. This can shrink the filter.
CAUTION
• Any maintenance and cleaning of outdoor
unit should be performed by an authorized
dealer or a licensed service provider.
• Any unit repairs should be performed by an
authorized dealer or a licensed service provider.
Care and
Maintenance
 Page 11

Common Issues
The following problems are not a malfuncon and in most situaons will not require repairs.
Issue Possible Causes
Unit does not turn
on when pressing
ON/OFF button
The Unit has a 3-minute protecon feature that prevents the unit from overloading.
The unit cannot be restarted within three minutes of being turned off.
The unit may change its seng to prevent frost from forming on the unit.
Once the temperature increases, the unit will start operang in the previously
selected mode again.
The set temperature has been reached, at which point the unit turns off the
compressor. The unit will connue operang when the temperature fluctuates
again.
The indoor unit
emits white mist
In humid regions, a large temperature difference between the room’s air and the
condioned air can cause white mist.
Both the indoor and
outdoor units emit
white mist
When the unit restarts in HEAT mode aer defrosng, white mist may be emied
due to moisture generated from the defrosng process.
Troubleshooting
The unit changes from
COOL/HEAT mode to
FAN mode
The indoor unit makes
noises A squeaking sound may occur aer running the unit in HEAT mode due to expansion
and contracon of the unit’s plasc parts.
Both the indoor unit
and outdoor unit make
noises
Low hissing sound during operaon: This is normal and is caused by refrigerant gas
flowing through both indoor and outdoor units.
Low hissing sound when the system starts, has just stopped running, or is defrosng:
This noise is normal and is caused by the refrigerant gas stopping or changing direcon.
Squeaking sound: Normal expansion and contracon of plasc and metal parts
caused by temperature changes during operaon can cause squeaking noises.
SAFETY PRECAUTIONS
If any of the following condions occurs, turn off your unit immediately!
• The power cord is damaged or abnormally warm
• You smell a burning odor
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED
SERVICE PROVIDER IMMEDIATELY!
Cooling and Heang Models: If the Operaon light and PRE-DEF (Pre-heang/
Defrost) indicators are lit up, the outdoor temperature is too cold and the unit’s
an-cold wind is acvated in order to defrost the unit.
In Cooling-only Models: If the “Fan Only” indicator is lit up, the outdoor
temperature is too cold and the unit’s an-freeze protecon is acvated in order
to defrost the unit.
A squeaking sound is heard when the system is OFF or in COOL mode. The noise is
also heard when the drain pump (oponal) is in operaon.
Troubleshooting
 Page 12

Troubleshooting
Issue Possible Causes
The outdoor unit
makes noises
The unit will make different sounds based on its current operang mode.
Dust is emitted from
either the indoor or
outdoor unit
The unit may accumulate dust during extended periods of non-use, which will be emied
when the unit is turned on. This can be migated by covering the unit during long periods
of inacvity.
The unit emits a
bad odor
The unit may absorb odors from the environment (such as furniture, cooking, cigarees,
etc.) which will be emied during operaons.
The unit’s filters have become moldy and should be cleaned.
The fan of the outdoor
unit does not operate
During operaon, the fan speed is controlled to opmize product operaon.
NOTE:
If problem persists, contact a local dealer or your nearest customer service center. Provide
them with a detailed descripon of the unit malfuncon as well as your model number.
Troubleshooting
When troubles occur, please check the following points before contacng a repair company.
Problem Possible Causes Solution
Poor Cooling
Performance
Temperature seng may be higher
than ambient room temperature Lower the temperature seng
The heat exchanger on the indoor
or outdoor unit is dirty
Clean the affected heat exchanger
The air filter is dirty Remove the filter and clean it according to
instrucons
The air inlet or outlet of either
unit is blocked
Turn the unit off, remove the obstrucon
and turn it back on
Doors and windows are open Make sure that all doors and windows are
closed while operang the unit
Excessive heat is generated
by sunlight
Close windows and curtains during periods
of high heat or bright sunshine
Too many sources of heat in the
room (people, computers,
electronics, etc.)
Reduce amount of heat sources
Low refrigerant due to leak
or long-term use
Check for leaks, re-seal if necessary and
top off refrigerant
 Page 13

Troubleshooting
Problem Possible Causes Solution
The unit is not
working
Power failure Wait for the power to be restored
The power is turned offTurn on the power
The fuse is burned out Replace the fuse
The Unit’s 3-minute protecon
has been acvated
Wait three minutes aer restarng
the unit
Timer is acvated Turn mer off
The unit starts and
stops frequently
There’s too much or too lile
refrigerant in the system
Check for leaks and recharge the
system with refrigerant.
Incompressible gas or moisture
has entered the system.
Evacuate and recharge the system
with refrigerant
The compressor is broken Replace the compressor
The voltage is too high or
too low
Install a manostat to regulate the
voltage
Poor heating
performance
The outdoor temperature is
extremely low
Use auxiliary heang device
Cold air is entering through
doors and windows
Make sure that all doors and
windows are closed during use
Low refrigerant due to leak or
long-term use
Check for leaks, re-seal if necessary
and top off refrigerant
System circuit is blocked
Determine which circuit is blocked and
replace the malfunconing piece of
equipment
 Page 14

Accessories
The air condioning system comes with the following accessories. Use all of the installaon parts and
accessories to install the air condioner. Improper installaon may result in water leakage, electrical
shock and fire, or equipment failure.
Accessories (Packed with the indoor unit)
Accessories (Packed with the outdoor unit) (some models)
Accessories
NOTE :
The remote control is only used to adjust the parameters.
Owner’s Manual & Installaon Manual
Name Shape Quantity
2
Remote controller (some models)
1
2
1
1
2
Baery (some models)
Transfer connector (some models)
Wired controller (some models)
Fasten belt
1
4
Sponge
Name Shape Quantity
1
1
Drain joint (some models)
Seal (some models)
Transfer connector (some models)
2
Copper nut (some models)
 Page 15

Indoor Unit Installation
Indoor Unit Parts
coil compartment (Access panel Removed)
Upflow drain pan
Horizontal drain pan
 Page 16
Indoor Unit Installation
Safety Precautions
WARNING
• Securely install the indoor unit on a structure
that can sustain its weight. If the structure is
too weak, the unit may fall and cause personal
injury, unit and property damage, or death.
•
•
DO NOT install the indoor unit in a bathroom
or laundry room as excessive moisture can
short the unit and corrode the wiring.
CAUTION
• Install the indoor and outdoor units, cables
and wires at least 3.2’ (1m) from televisions
or radios to prevent stac or image distoron.
Depending on the appliances, a 3.2’ (1m)
distance may not be sufficient.
• If the indoor unit is installed on metal, it must
be electrically grounded.
Indoor Unit Installation Instructions
The indoor unit should be installed in a locaon
that meets the following requirements:
Enough room for installaon and maintenance.
Enough room for the connecng pipe and
drainpipe.
The ceiling is horizontal and its structure can
sustain the weight of the indoor unit.
The air inlet and outlet are not impeded.
The airflow can fill the enre room.
There is no direct radiaon from heaters.
IMPORTANT
Danger of explosion. Keep flammable materials
and vapors, such as gasoline, away from air
handler. Place air handler so that heang
elements are at least 18 inches (46 cm) above
the floor for a garage installaon. Failure to
follow these instrucons can result in death,
explosion, or fire.
Please apply sealant around the places where
the wires, refrigerant pipes and condensate
pipes enter the cabinet.
CAUTION
DO NOT install the unit in the following
Areas with oil drilling or fracking
Coastal areas with high salt content in the air
Areas with causc gases in the air, such as
near hot springs
Areas with power fluctuaons, such as
factories
Enclosed spaces, such as cabinets
Areas with strong electromagnec waves
Areas that store flammable materials or gas
Rooms with high humidity, such as
bathrooms or laundry rooms
locaons:

RECOMMENDED DISTANCES BETWEEN THE
INDOOR UNIT
The distance between the mounted indoor unit
should meet the specificaons illlustrated in the
following diagram.
Plenum Clearances
MINIMUM CLEARANCE
OF 1″/25.4mmALL SIDES
FLEXIBLE
DUCT COLLAR
The outlet side pipe length is 59’’/1.5m.
59’’/1.5m
Indoor parts installation size
MODEL(Btu/h)
Dimensions
Length of A
Length of B
12K~24K
1143
533
Length of C
Length of D
Length of E
445
400
260
30K~48K
1245
533
534
490
260
60K
1346
45 49 53
533
21 21 21
622
17-1/2 21-1/50 24-1/2
580
15-3/4 19-5/16 22-27/32
260
10-1/4 10-1/4 10-1/4
Vertical installations
Horizontal installations
A
B
C
E
D
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
MODEL(Btu/h)
Dimensions
Length of A
Length of B
60K
Length of C
Length of D
Length of E
1245
533
534
490
260
49
21
21-1/50
19-5/16
10-1/4
mm
inch
mm
inch
mm
inch
mm
inch
mm
inch
 Page 17
Indoor Unit Installation
(unit: inch/mm)
Model A（for North America models）
Model B
Fixing instructions: When installed vercally
(upward or downward), the lower end of the air
outlet needs to be connected to the L-shaped
metal air duct and fastened by screws.
WARNING
IMPORTANT
Use duct tape and/or Permagum to seal closed
any space around the holes where the drain lines
exit the cabinet. Warm air must not be allowed
to enter throughany gaps or holes in the cabinet.
There must be an airght seal between the
boom of the air handler and the return air
plenum. Use fiberglass sealing strips, caulking,
or equivalent sealing method between the
plenum and the air handler cabinet to ensure a
ght seal. Return air must not be drawn from a
room where this air handler or any gas-fueled
appliance (i.e., water heater), or carbon
monoxide-producingdevice (i.e., wood fireplace)
is installed.

D
t
Recommended size of lter
Mount positions
Installation place
The units can be installed in a vercal (down
and up)and Horizontal(right and le)
configuraon.
Vertical up installations
Vertical installations
Horizontal installations
24inch(min)
24inch(min)
 Page 18
Indoor Unit Installation
W
MODEL(Btu/h)
12-24K
30-48K
W
16
495.3
60K 584.2
D
20
20
20
508
508
508
t
1
1
1
25.4
24.4
25.4
(unit: inch/mm)
406.4
19-1/2
23
inch mm inch mm inch mm
Model A（for North America models）
MODEL(Btu/h)
60K
W
495.3
D
508
20
t
25.4
1
19-1/2
inch mm inch mm inch mm
Model B
IMPORTANT
A field-fabricated secondary drain pan, with a
drain pipe to the outside of the building, is
required in all installaons over a finished living
space or in any area that may be damaged by
overflow from the main drain pan. In some
localies, local codes may require a secondary
drain pan for any horizontal installaon.
DUCT CONNECTIONS：Air supply and return
may be handled in one of several ways best suited
to the installaon (See table for dimensions for
duct inlet and outlet connecons). The vast majority
of problems encountered with combinaon cooling
systems can be linked toimproperly designed or
installed duct systems, it is therefore highly
important to the success of an installaon that the
duct system be properly designed and installed.
Use flexible duct collars to minimize the transmission
of vibraon/noise into the condioned space.
Where return air duct is short, or where sound is
liable to be a problem, sound absorbing glass fiber
should be used inside the duct. Insulaon of duct
work is a must where it runs through an uncooled
space during the cooling season. The use of a vapor
barrier is recommended to prevent absorpon of
moisture from the surrounding air into the insulaon.
The supply air duct should be properly sized by
use of a transion to match unit opening. All ducts
should be suspended using flexible hangers and
never fastened directly to the structure. This unit
is not designed for nonducted (freeblow)
applicaons. Duct work should be fabricated and
installed in accordance with local and/or naonal
switchs.

Horizontal installations
T2：Evaporator central temperature sensor
T1：room temperature sensor (some models)
The unit may be installed in one of the upflow,
downflow, horizontal le or horizontal right
orientaons .
Indicaon of the posion of each temperature
temperature sensor of the evaporator:
12-24K model
30-48K model
60K model
downflowupflow
horizontal le
horizontal right
T2
T1
T2
T1
T2
T1
 Page 19
Indoor Unit Installation
NOTE: For installaon, an drain pan (not supplied)
must be installed.
NOTE: Vercal up and horizontal le installaon
does not need to change thedirecon of
evaporator.

Please follow these steps to perform Vercal
up installaon and Horizontal le installaon:
1. Open the upper cover.
2.
Open the cover of the electronic control box.
3. Connect the wire according to the wiring
diagram.
4. Connect the pipes.
5. Install the drainage pipes.
For the Horizontal right installaon and Vercal
down installaon, the direcon of the evaporator
should be changed . Please do it according to the
following steps:
1. Remove the cover plate of the filter ,then take
the filter off.
2. Remove the upper cover assembly.
3. Remove evaporator cover plate.
4. Remove T1, T2 temperature sensor plug、
electronic expansion valve wiring
Disassemble T1, T2 temperature sensor and
electronic expansion valve
Regular installation instructions
Reversing installation instructions
T2
T1
 Page 20
Indoor Unit Installation
NOTE: T1 is only available for some models.