Cooper & Hunter CHML-U14RK2 User manual

Owner's Manual
Split Type Wall-mounted Air Conditioner
.
Thank you for choosing our product.
For proper operation, please read and keep this manual carefully.
CHML-U14RK2
CHML-U18RK2
CHML-U21RK3
CHML-U24RK3
CHML-U28RK4
CHML-U36RK4
CHML-U42RK5

R32: 675
CONTENTS GENERAL INFORMATION
1
6
3
2
7
9
9
10
14
14
15
15
17
Technical Data
Electrical Connections
Installing The Outdoor Unit
Maintenance
Installation Dimension Diagram
Safety Operation Of Flammable Refrigerant
16
Check After Installation
Bleeding
Conformity And Range
The Refrigerant
Warning
The Instructions Before Use
Name of Parts
Outdoor Unit Working Temperature Range
INSTALLER GENERAL
INFORMATION
The products in this manual may be different wlith the rea one, according to different models,
some models have displayer and some models without displayer, the position and shape of
the displayer please refer to the real one.
In line with the company’s policy of continual product improvement, the aesthetic and dimensional
characteristics, technical data and accessories of this appliance may be changed without notice.
Children should be supervised to ensure that they do not play with the appliance.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or 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.
This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, recycle
it responsibly to promote the sustainable reuse of material resources. To
return your used device, please use the return and collection systems or
contact the retailer where the product was purchased. They can take this
product for environmental safe recycling.

GENERAL INFORMATION
1
EXPLANATION OF SYMBOLS
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury.
Indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
Indicates a hazardous situation that, if not avoided, may
result in minor or moderate injury.
Indicates important but not hazard-related information,
used to indicate risk of property damage.
Indicates a hazard that would be assigned a signal word
WARNING or CAUTION.
WARNING
CAUTION
DANGER
N OTIC E
CONFORMITY AND RANGE GENERAL INFORMATION
Please read this owner's manual carefully before operating the unit and keep it
carefully for consultation.
Only use the air conditioner as instructed in this booklet. These instructions are
not intended to cover every possible condition and situation. As with any electrical
household appliance, common sense and caution are therefore always
recommended for installation, operation and maintenance.

The Refrigerant
●To realize the function of the air conditioner unit, a special refrigerant circulates
.
leads to explosion
. It can
●Compared to common refrigerants, R32 is a nonpolluting refrigerant with no
lower. R32 has got very good thermodynamic features which lead to a really high
WARNING:
Do not use means to accelerate the defrosting process or to clean, other than
those recommended by the manufacture.Should repair be necessary, contact your
nearest authorized Service Centre.
The appliance shall be stored in a room without continuously operating ignition
electric heater.)
Do not pierce or burn.
’s
instructions only.
Be aware that refrigrants not contain odour.
Read specialist’s manual.
Please read this operating manual carefully before operating the unit.
to the material objects for reference.
THE REFRIGERANT GENERAL INFORMATION
2
Appliance shall be installed, operated and stored in a room with a floor area larger
than
X .m
2
(Please refer to table "a" in section of " Safety Operation of Inflammable
Refrigerant" for Space X.)

3
GENERAL INFORMATION
Warning
Operation and Maintenance
This appliance can be used by children aged from 8 years and above and
persons with reduced physical, sensory ormental capabilities or lack of
experience and knowledge if they have been given supervision or instruction
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.
Do not connect air conditioner to multi-purpose socket. Otherwise, it may
cause fire hazard.
Do disconnect power supply when cleaning air conditioner. Otherwise, it
may cause electric shock.
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Do not wash the air conditioner with water to avoid electric shock.
Donot spray wateronindoorunit. It may cause electric shock ormalfunction.
After removing the filter, do not touch fins to avoid injury.
Do not use fire or hair dryer to dry the filter to avoid deformation or fire hazard.
Maintenance must be performed by qualified professionals. Otherwise, it may
cause personal injury or damage.
Do not repair air conditioner by yourself. It may cause electric shock or damage.
Please contact dealer when you need to repair air conditioner.
Do not extend fingers or objects into air inlet or air outlet. It may cause personal
injury or damage.
Do not block air outlet or air inlet. It may cause malfunction.
Do not spill water on the remote controller, otherwise the remote controller ma
be broken.
When below phenomenon occurs, please turn off air conditioner and disconnect
power immediately，and then contact the dealer or qualified professionals for
service.
Power cord is overheating or damaged.
There’s abnormal sound during operation.
Circuit break trips off frequently.
Air conditioner gives off burning smell.
Indoor unit is leaking.

4
GENERAL INFORMATION
Warning
If the air conditioner operates under abnormal conditions, it may cause
malfunction，electric shock or fire hazard.
When turning on or turning off the unit by emergency operation switch, please
press this switch with an insulating object other than metal.
Do not step on top panel of outdoor unit, or put heavy objects. It may cause
damage or personal injury.
Attachment
Installation must be performed by qualified professionals. Otherwise, it may
cause personal injury or damage.
Must follow the electric safety regulations when installing the unit.
According to the local safety regulations, use qualified power supply circuit
and circuit break.
Do install the circuit break. If not, it may cause malfunction.
An all-pole disconnection switch having a contact separation of at least 3mm in
all poles should be connected in fixed wiring.
Including an circuit break with suitable capacity, please note the following table.
Air switch should be included magnet buckle and heating buckle function, it can
protect the circuit-short and overload.
Air Conditioner should be properly grounded. Incorrect grounding may cause
electric shock.
Don't use unqualified power cord.
Properly connect the live wire, neutral wire and grounding wire of power socket.
Do not put through the power before finishing installation.
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Be sure to cut off the power supply before proceeding any work related to
electricity and safety.
Make sure the power supply matches with the requirement of air conditioner.
Unstable power supply or incorrect wiring or malfunction. Please install proper
power supply cables before using the air conditioner.
The temperature of refrigerant circuit will be high, please keep the
interconnection cable away from the copper tube.
The appliance shall be installed in accordance with national wiring regulations.
Installation must be performed in accordance with the requirement of NEC and
CEC by authorized personnel only.

5
GENERAL INFORMATION
Warning
The air conditioner is the first class electric appliance. It must be properly
grounding with specialized grounding device by a professional. Please make
sure it is always grounded effectively, otherwise it may cause electric shock.
The yellow-green wire in air conditioner is grounding wire, which can't be used
for other purposes.
The grounding resistance should comply with national electric safety regulations.
The appliance must be positioned so that the plug is accessible.
All wires of indoor unit and outdoor unit should be connected by a professional.
If the length of power connection wire is insufficient，please contact the
supplier for a new one. Avoid extending the wire by yourself.
For the air conditioner with plug,the plug should be reachable after finishing
installation.
For the air conditioner without plug, an circuit break must be installed in the line.
If you need to relocate the air conditioner to another place, only the qualified
person can perform the work. Otherwise, it may cause personal injury or damage.
Select a location which is out of reach for children and far away from animals or
plants.If it is unavoidable, please add the fence for safety purpose.
The indoor unit should be installed close to the wall.

THE INSTRUCTIONS BEFORE USE GENERAL INFORMATION
WARNING
When having a burning smell or
smoke,please turn off the power
supply and contact with the ser-
vice center.
If the abnormity still exists,the unit
may be damaged,and may cause
electric shock or fire.
Power must adopts the special
circuit to prevent fire.
Otherwise, it can cause electric
shock or fire.
Disconnect the power supply if
long putting the air conditioner
out of use.
Otherwise,the accumulated dusts
may cause overheating or fire.
Never damage the electric wire
or use the electric wire which is
not appointed.
Otherwise,it will cause overheating
or fire.
When cleaning,it is necessary
to stop driving and turn off the
power supply.
Cut off power supply
Otherwise,it may cause electric
shock or damage.
The power supply must adopt the
special circuit that with air switch
protection and assure it has enou-
gh capacity.The unit will be turned
on or off according to your requir-
ement automatically,please do not
turn on or turn off the unit freque-
ntly,otherwise disadvantage effect
may be caused to the unit.
Rated voltage of this air conditi-
oner 220-240V, 50Hz, The com-
pressor will vibrate sharply if the
voltage is too low, resappointed.
amage to refrigerating system.
Electrical component are easy to
damage if the voltage is too high.
Don't attempt to repair the air
conditioner by yourself.
The wrong repair will lead to an
electric shock or fire,so you should
contact the service center to repair.
Don't step on the top of the
outdoor unit or place something
on it.
If it is damaged, it may lead to the
fall of the unit and cause the injury.
Please note whether the insta-
lled stand is firm enough or not.
Earthing: The unit must be reli-
ably earthed.The earthing cable
shall be connected to the spec-
ial earthing device in the const-
ruction.
As falling off the outdoor unit can be
dangerous.
Never cut off or damage power
cables and control wires. If the
power cable and signal control
wire were damaged, change
them by professional.
6
★ ★
★ ★
★
★
★ ★
★ ★
★
★

Warning
CHML-U24RK3、CHML-U28RK4、 CHML-U42RK5、 CHML-U36RK4：
CHML-U18RK2、CHML-U21RK3：
The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper
tube.
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash your air conditioner in
any case.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air conditioner. (Only use
soft dry cloth moist cloth clean the air conditioner cabinet).
Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special
treatment is necessary.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.
OUTDOOR UNIT
No. Description
1 Air outlet grille
2Valve
Warning
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric
shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash
your air conditioner in any case.
This product must not be disposed together with the domestic waste.
This product has to be disposed at an authorized place for recycling of electrical and
electronic appliances.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air
conditioner. (Only use soft dry cloth moist cloth clean the air conditioner cabinet).
The temperature of refrigerant circuit will be high,please keep the interconnection cable
away from the copper tube.
Note: The above figures are only intended to a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to
the appearance of the units that have been purchased.
No. Description
1 Air outlet grille
2Valve
OUTDOOR UNIT
NAME OF PARTS GENERAL INFORMATION
7
1
1
2
2

CHML-U14RK2：
OUTDOOR UNIT
No. Description
1 Air outlet grille
2Valve
Warning
Be sure to cut off the power supply before cleaning the air conditioner; otherwise electric
shock might happen.
Wetting of air conditioner may cause the risk of electric shock. Make sure not to wash
your air conditioner in any case.
This product must not be disposed together with the domestic waste.
This product has to be disposed at an authorized place for recycling of electrical and
electronic appliances.
Volatile liquids such as thinner or gasoline will cause damage to the appearance of air
conditioner. (Only use soft dry cloth moist cloth clean the air conditioner cabinet).
The temperature of refrigerant circuit will be high,please keep the interconnection cable
away from the copper tube.
Note: The above figures are only intended to a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
NAME OF PARTS GENERAL INFORMATION
8
1
2

P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
955
899
396
378
700
596
MODE
16 25
1.5
10
1.0 2.5
CHML-U18RK2
CHML-U14RK2
Electricity supply
Electrical data
220-240V~,50Hz 220-240V~,50Hz220-240V~,50Hz
mm
2
Size and clearance
CHML-U24RK3、CHML-U28RK4
P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
980
427
790
MODE
220-240V~,50Hz
mm
2
25
2.5
Electrical data
Electricity supply
Size and clearance
TECHNICAL DATA GENERAL INFORMATION
TECHNICAL DATA
OUTDOOR UNIT WORKING TEMPERATURE RANGE GENERAL INFORMATION
9
Indoor side DB/WB(℃)Outdoor side DB/WB(℃)
Maximum cooling 32/23 43/26
Maximum heating 27/-
24/18
●The operating temperature range (outdoor temperature) for cooling only unit is
-15
℃~43℃; for heat pump unit is -20℃~ 43℃.
CHML-U21RK3
GENERAL INFORMATION
CHML-U36RK4 、 CHML-U42RK5
P
L
H
Minimum power cord section
mm
mm
mm
L
P
H
Fuse or air switch
1087
440
1103
MODE
220-240V~,50Hz
mm
2
25
2.5
Electrical data
Electricity supply
Size and clearance

INSTALLER
10
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. terminal of line bank. Wiring should meet
that of indoor unit.
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
5. Install the handle.
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
ofthe unit A, unit B, unit C and unit D must be
corresponding to each other respective.
The appliance shall be installed in accordance with
national wiring regulations.
ELECTRICAL CONNECTIONS
CHML-U14RK2：
HANDLING
After having removed the packaging, check that the
contents are intact and complete.
The outdoor unit must always be kept upright.
Handling must be done by suitably equipped qualified
technical personnel using equipment that is for suitable
the weight of the appliance.
USER
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
CHML-U14RK2 10A
Air switch capacityAir-conditioner
Handle
Front
side plate
To the power supply To unit B
Power cord
To unit A
connecting
cable
L
connecting
cable
INDOOR UNIT A
A
INDOOR UNIT B
N3
2
L
N(1)
POWER
L N
blue blue
yellow-
green yellow-
green
(black) black
brown
brown
B
32
N(1)
blue yellow-
green
black
brown

ELECTRICAL CONNECTIONS
CHML-U18RK2、 CHML-U21RK3、
INSTALLER
CHML-U24RK3：
1.
CHML-U18RK2
Handle
2. Remove the cable clamp, connect the power connection
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
To unit A To unit B
5. Install the handle.
L
Power cord
Air switch capacity
CHML-U18RK2 16A
A
L N
N(1)
2 3
N(1)
2 3
25A
25A
blue black
brown
blue black
brown
INDOOR UNIT A INDOOR UNIT B
CHML-U24RK3
Handle
To unit A To unit B To unit C
L
Handle Power cord
A B
L N
N(1)
2 3
N(1)
2 3
N(1)
2 3
blue black brown blue black brown blue black brown
To unit A To unit B To unit C
INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C
L
Power cord
max |Zsys| unit:ohms
0.199
A B
L N
N(1)
2 3
N(1)
2 3
N(1)
2 3
blue black
brown brown
blue black blue black
brown
INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C
11
Remove the handle at the right side plate of the outdoor
unit (one screw).
cable with the terminal at the row of connection and fix
the connection. The fitting line distributing must be
consistent with the indoor unit. terminal of line bank.
Wiring should meet that of indoor unit.
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
Air-conditioner
connecting
cable
connecting
cable
To the power supply
B
brown
(black)
CHML-U24RK3
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
The connection pipes and the connectiong wirings
of the unit A and unit B must be corresponding to
each other respective.
The appliance shall be installed in accordance with
national wiring regulations.
Note: the above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
CHML-U21RK3
yellow- blue
green yellow-
green
yellow-
green
L N
POWER
connecting
cable
connecting
cable connecting
cable
To the power supply
C
brown
(black) yellow- blue
green yellow-
green
yellow-
green
yellow-
green
L N
POWER
To be in compliance with EN/IEC 61000-3-11,
impedance value of power-supply system
connected to
product must be less than or equal to the allowable
maximum value
of |Zsys| in the following sheet:
models
connecting
cable
connecting
cable
connecting
cable
To the power supply
C
CHML-U21RK3
Before connecting the product to public power netword,
please consult your local power supply authority to ensure
that the power network has met the above requirements.
no requirement for the unlisted product’s impedance
value of power-supply system.
brown
(black) yellow- blue
green yellow-
green
yellow-
green
yellow-
green
L N
POWER
CHML-U21RK3

INDOOR UNIT A
A
INDOOR UNIT B
N3
2 32 32 32
L
N(1)
POWER
L N
blue blue
yellow-
green yellow-
green
(black) black
brown
brown
B
N(1)
blue yellow-
green
black
brown
INDOOR UNIT C
C
N(1)
blue yellow-
green
black
brown
INDOOR UNIT D
D
N(1)
blue yellow-
green
black
brown
ELECTRICAL CONNECTIONS INSTALLER
12
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. terminal of line bank. Wiring should meet
that of indoor unit.
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
5. Install the handle.
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
ofthe unit A, unit B, unit C and unit D must be
corresponding to each other respective.
The appliance shall be installed in accordance with
national wiring regulations.
CHML-U36RK4：CHML-U28RK4、
Handle
To the power supply
To unit B
To unit A
connecting
cable
To unit C
To unit D
connecting
cable
connecting
cable
connecting
cable
Power cord
L
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
25A
Air switch capacityAir-conditioner
CHML-U28RK4
CHML-U36RK4

INDOOR UNIT A
A
INDOOR UNIT B
N3
2
L
N(1)
POWER
L N
blue blue
yellow-
green yellow-
green
(black) black
brown
brown
B
32
N(1)
blue yellow-
green
black
brown
INDOOR UNIT C
C
32
N(1)
blue yellow-
green
black
brown
INDOOR UNIT D
D
32
N(1)
blue yellow-
green
black
brown
Handle
To the power supply
To unit B
To unit A
connecting
cable
To unit C
To unit D
connecting
cable
connecting
cable
connecting
cable
Power cord
L
To unit E
connecting
cable
INDOOR UNIT E
E
32
N(1)
blue yellow-
green
black
brown
INSTALLER
13
2. Remove the cable clamp, connect the power
connection cable with the terminal at the row of
connection and fix the connection. The fitting line
distributing must be consistent with the indoor
unit. terminal of line bank. Wiring should meet
that of indoor unit.
3. Fix power connection wire by wire clamp.
4. Ensure wire has been fixed well.
5. Install the handle.
1. Remove the handle at the right side plate of the
outdoor unit (one screw).
Note: The above figures are only intended to be a simple
diagram of the appliance and may not correspond to the
appearance of the units that have been purchased.
Wrong wire connection may cause malfunction of
some electric components.After fixing cable, ensure
that leads between connection to fixed point have
some space.
An all-pole disconnection switch having a contact
separation of at least 3mm in all pole should be
connected in fixed wiring.
The connection pipes and the connectiong wirings
ofthe unit A, unit B, unit C and unit D must be
corresponding to each other respective.
The appliance shall be installed in accordance with
national wiring regulations.
ELECTRICAL CONNECTIONS
CHML-U42RK5：
Including an air switch with suitable capacity,
please note the following table. Air switch
should be included magnet buckle and heating
buckle function, it can protect the circuit-short
and overload. (Caution: please do not use the
fuse only for protect the circuit)
Air switch capacityAir-conditioner
CHML-U42RK5 25A

INSTALLING THE OUTDOOR UNIT INSTALLER
BLEEDING INSTALLER
14
Do not install the outdoor unit in pits or air vents
Installing the pipes
Use suitable connecting pipes and equipment for
the refrigerant R32.
Wrap all the refrigerant pipes and joints.
Tighten the connections using two wrenches wor-
king in opposite directions.
Vacuum pump
Humid air left inside the refrigerant circuit can cause com-
pressor malfunction. After having connected the indoor
and outdoor units, bleed the air and humidity from the
refrigerant circuit using a vacuum pump.
(1) Unscrew and remove the caps from the 2-way and 3-
way valves.
(2) Unscrew and remove the cap from the service valve.
(3) Connect the vacuum pump hose to the service valve.
(4) Operate the vacuum pump for 10-15 minutes until an
absolute vacuum of 10 mm Hg has been reached.
(5) With the vacuum pump still in operation, close the
low-pressure knob on the vacuum pump coupling.
Stop the vacuum pump.
(6) Open the 2-way valve by 1/4 turn and then close it
after 10 seconds. Check all the joints for leaks using
liquid soap or an electronic leak device.
(7) Turn the body of the 2-way and 3-way valves. Discon-
nect the vacuum pump hose.
(8) Replace and tighten all the caps on the valves.
Vacuum pump Vacuum pump
Location
Twisting moment (N.m)
35-40
60-65
45-50
70-75
Φ12
Φ19
Diameter (mm)
Φ9.52
Φ16
15-20Φ6
18K unit need to be installed the indoor unit
Caution: Installation Must be Performed in Accordance
with the NEC/CEC by Authorized Personnel Only.
conversion joint
18K MODE:
●
INDOOR
UNIT
Connect to the
indoor unit
Refrigerant fluid direction of fiow
3-way valve
2-way valve
inlet
(2)Turn
(8) Secure
(7)Turn to open fully
(2)Turn
(8) Secure
(6) Openby 1/4 turn
(7)Turn to open fully
(2)Turn
(8) Secure
Valve cap
Valve cap
Service
The refrigerant pipes must not exceed the maximum
Use bolts to secure the unit to a flat, solid floor.
When mounting the unit on a wall or the roof, make
sure the support is firmly secured so that it cannot
move in the event of intense vibrations or a strong
wind.
Install the drain fitting and the drain hose
(for model with heat pump only)
Condensation is produced and flows from the out-
door unit when the appliance is operating in the
heating mode. In order not to disturb neighbours
and to respect the environment,install a drain fitting
and a drain hose to channel the condensate water.
Install the drain fitting and rubber washer on the
outdoor unit chassis and connect a drain hose to it
as shown in the figure.
Models(m) 18Kx214Kx2 28Kx4
Max. connection pipe length 20 70
Max. connection pipe length
(Simple one indoor unit) 10
20
10 20
21Kx3 24Kx3
60
20
60
20
The sum of the capacity codes of the indoor units should be
among 50%-150% of that of the outdoor unit.
heights 5m(14K&18K)or 10m(21K&24Kx3&28K).

Use suitable instruments for the refrigerant R32.
Do not use mineral oils to clean the unit.
Ensure that the recommende dspace is left around the appliance.
The installation must be done by trained and qualified service personnel with reliability according to this
manual.
Contact service center before installation to avoid the malfunction due to unprofessional installation.
When picking up and moving the units, you must be guidedby trained and qualified person.
Do not use any other refrigerant than R32.
●
MAINTENANCE INSTALLER
INSTALLATION DIMENSION DIAGRAM INSTALLER
15
CHML-U18RK2
CHML-U21RK3
CHML-U14RK2
30cm
Space to the cover
or above
30cm
50cm
(Air inlet side)
or above
or above
Space to the wall
30cm
Space to the cover
or above
30cm
50cm
(Air inlet side)
or above
or above
Space to the wall
30cm
Space to the cover
or above
30cm
50cm
200cm
(Air inlet side)
or above
or above
Space to the wall
(Air outlet side)
or above
or more
Space to the cover
50cm
or more
Space to the cover
50cm
or more
Space to the cover
50cm
200cm
(Air outlet side)
or above
200cm
(Air outlet side)
or above
CHML-U24RK3 CHML-U28RK4
CHML-U36RK4 CHML-U42RK5

CHECK AFTER INSTALLATION INSTALLER
16
Check Items
Is the installation reliable?
Has the gas leakage been checked?
Is the thermal insulation of the unit
sufficient?
Is the drainage smooth?
Does the power supply voltage accord
with the rated voltage specified on the
nameplate?
Are the lines and pipelines correctly
installed?
Are the models of lines in conformity
with requirements?
Are there any obstacles near the air
inlet and outlet of the indoor and out-
door units?
Have the length of refrigerating pipe
and refrigerant charge amount been
recorded?
Has the unit been safely grounded?
Problems Owing to Improper Installation
The unit may drop, vibrate or make noises
May cause unsatisfactory cooling (heating)
effect
May cause condensation and water dropping
May cause condensation and water dropping
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
The unit may bread down or the components
may be burned out
It is not easy to decide the charge amount
of refrigerant.
Risk of electrical leakage

It can only be repaired by the method suggested by the equipment’s manufacturer.
Qualification requirement for installation and maintenance man
Installation notes
The air conditioner is not allowed to use in a room that has running fire (such as fire source, working coal gas ware,
operating heater).
Maintenance notes
Welding
Check whether the maintenance area or the room area meet the requirement of the nameplate.
- It’s only allowed to be operated in the rooms that meet the requirement of the nameplate.
Check whether the maintenance area is well-ventilated.
- The continuous ventilation status should be kept during the operation process.
Check whether there is fire source or potential fire source in the maintenance area.
- The naked flame is prohibited in the maintenance area; and the “no smoking” warning board should be hanged.
Check whether the appliance mark is in good condition.
- Replace the vague or damaged warning mark.
If you should cut or weld the refrigerant system pipes in the process of maintaining, please follow the steps as below:
It is not allowed to drill hole or burn the connection pipe.
The air conditioner must be installed in a room that is larger than the minimum room area. The minimum room area is
shown on the nameplate or following table a.
Leak test is a must after installation.
table a- Minimum room area ( m )
2
Charge amount (kg) ≤1.21.31.41.51.61.71.81.9 2 2.12.2 2.3 2.4 2.5
/
/
/
/14.516.819.3 22 24.8 27.8 3134.3 37.8 41.5 45.4 49.4 53.6
5.2 6.17 7.9 8.9 1011.212.413.61516.317.819.3
1.61.9 2.12.4 2.8 3.13.4 3.8 4.2 4.6 5 5.5 6
1.1 1.31.41.61.8 2.12.3 2.6 2.8 3.13.4 3.7 4
floor location
wall mounted
window mounted
ceiling mounted
Minimum
room
2
area( m )
INSTALLER
17
SAFETY OPERATION OF FLAMMABLE REFRIGERANT
All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the
authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry.
If it needs other technician to maintain and repair the appliance, they should be supervised by the person who
bears the qualification for using the flammable refrigerant.
Filling the refrigerant
Safety instructions for transportation and storage
a. Shut down the unit and cut power supply
b. Eliminate the refrigerant
c. Vacuuming
d. Clean it with N2 gas
e. Cutting or welding
f. Carry back to the service spot for welding
The refrigerant should be recycled into the specialized storage tank.
Make sure that there isn’t any naked flame near the outlet of the vacuum pump and it’s well-ventilated.
Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant won’t
contaminate with each other.
After filling is finished, please do the leakage detection before test running; another time of leak detection should be
done when it’s removed.
Please use the flammable gas detector to check before unload and open the container.
No fire source and smoking.
According to the local rules and laws.
The refrigerant tank should be kept upright at the time of filling refrigerant.
Stick the label on the system after filling is finished (or haven’t finished).
Don’t overfilling.

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