Cooper & Hunter CHML-ID09NK User manual

Installation and Operation Manual
Free Match Series R410A
Multi VFR System-Indoor Unit
(For European Union)
Applicable models：
CHML-ID09NK
CHML-ID12NK
CHML-ID18NK
CHML-ID21NK
CHML-ID24NK
Please read this manual carefully before the installation and operation of this product.

User Notice
◆The total capacity of the indoor units which runs at the same time can not exceed 150% of
that of the outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be poor.
◆Switch the main power on 8 hours before start the unit, helpful for a successful startup.
◆It is a normal phenomenon that the indoor unit fan will still run for 20~70 seconds after the
indoor unit receives the “stop” signal so as to make full use of after-heat for the next operation.
◆ When the running modes of the indoor and outdoor units conict, it will be indicated on
the display of the wired controller in ve seconds and then the indoor unit will stop. In this case,
they can back to the normal condition by harmonizing their running modes: the cooling mode is
compatible with the dehumidifying mode and the fan mode can go with any other mode. If the
supply power fails when the unit is running, then the indoor unit will send the “start” signal to the
outdoor unit three minutes later after power recovery.
◆During installation, the communication cable and the power cord must not be twisted
together but instead separated with an interval of at least 2cm; otherwise the unit is likely to run
abnormally.
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.
Thank you for purchasing C&H air conditioners. Before use, please read this manual
carefully and keep it properly for further reference.

Contents
ⅠSafety Precautions....................................................................................... 1
ⅡInstallation Location and Matters Needing Attention................................. 2
1 How to select the installation location for the indoor unit .................................. 2
2 Electric Wiring..................................................................................................... 2
3 Earthing Requirements ........................................................................................ 2
4 Accessories for Installation.................................................................................. 3
ⅢInstallation Instructions .............................................................................. 4
1 Outline Dimension Drawings of the Indoor Unit ............................................... 4
2 Dimension Requirements on the Installation Space of the Indoor Unit .............. 4
3 Installation of the Indoor Unit ............................................................................. 5
4 Horizontality Check of the Indoor Unit............................................................... 6
5 Installation of the Air Supply Duct...................................................................... 6
6 Drawings of the Air Supply Outlet and Return Air Inlet..................................... 7
7 Installation of the Return Air Duct ...................................................................... 8
8 Installation of the Condensate Pipe ..................................................................... 9
9 Design of the Drain Pipe ..................................................................................... 9
10 Installation of the Drain Pipe............................................................................. 9
11 Precautions for the Lift Pipe ............................................................................ 10
12 Test for the Drainage System........................................................................... 11
14 Insulation for the Refrigerant Pipe .................................................................. 12
15 Wiring between the Wire and the Wiring Terminal ......................................... 12
16 Wiring of the Power Cord (single-phase) ........................................................ 13
17 Wiring of the Signal Line of the Wired Controller .......................................... 15
18 Electric Installation.......................................................................................... 15
ⅣRated Working Conditions........................................................................ 16
ⅤError Analysis ........................................................................................... 17
ⅥMaintenance.............................................................................................. 18

Safety Precautions
1
ⅠSafety Precautions
Please read this manual carefully before use and operate correctly as instructed in this manual.
Please especially take notice of the following two symbols：
Warning! It indicates improper operation which will lead to human casualty or sever injury.
Cuation! It indicates improper operation which will lead to injury or property damage.
Warning!
◆The installation should be committed to the appointed service center; otherwise it all cause water
leakage, electric shock or re etc.
◆Please install the unit where is strong enough to withstand the weight of the unit; otherwise, the unit
would fall down and cause injury or death.
◆The drain pipe should be installed as instructed in the manual to guarantee the proper drainage;
meanwhile it should be insulated to prevent condensing; otherwise the improper installation would cause
water leakage and then wet the household wares in the room.
◆ Do not use or place any inammable or explosive substance near the unit.
◆Under the occurrence of an error (like burning smell etc.), please cut off the main power supply of the
unit.
◆ Keep good ventilation in the room to avoid oxygen decit.
◆ Never insert your nger or any other object into the air outlet/inlet grille.
◆Please take notice of the supporting frame of the unit to see if it is damaged over the long time period
of use.
◆ Never ret the unit and contact the sales agent or the professional installation personnel for the repair
or relocation of the unit.
An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be
connected in xed wiring.
Cuation!
◆ Before installation, please check if the power supply corresponds with the requirement specied on the
nameplate and also check its security.
◆Before use, please check if the piping and wiring are correct to avoid water leakage, refrigerant
leakage, electric shock, re etc.
◆The main power supply must be earthed to avoid the hazard of electric shock and never connect this
earth wire to the gas pipe, running water pipe, lightening rod or phone cable’s earth lead.
◆ Turn off the unit after it runs at least ve minutes; otherwise its service life will be shortened.
◆Do not allow children operate this unit.
◆Do not operate this unit with wet hands.
◆ Cut off the main power supply prior to the cleaning of the unit or the replacement of the air lter.
◆When the unit is not to be used for a long time, please cut off the main power supply of the unit.
◆Do not expose the unit to the moist or corrosive circumstances.
◆After the electric installation, please take an electric leakage test.

Installation Location and Matters Needing Attention
2
ⅡInstallation Location and Matters Needing Attention
The installation of the unit must comply with the national and local safety regulations. The
installation quality directly affects the normal use, so the user should not carry out the installation
personally. Instead, the installation and debugging should be done by the professional personnel.
Only after that, can the unit be energized.
1 How to select the installation location for the indoor unit
a. Where there is no direct sunlight.
b. Where the top hanger, ceiling and the building structure are strong enough to withstand the weight of
the unit.
c. Where the drain pipe can be easily connected to outside.
d. Where the ow of the air inlet and outlet are not blocked.
e. Where the refrigerant pipe of the indoor unit can be easily led to outside.
f. Where there is no inammable, explosive substances or their leakage.
g. Where there is no corrosive gas, heavy dust, salt mist, smog or moisture.
CUATION ！
The unit which is installed in the following places is likely to run abnormally. If unavoidable, please
contact the professional personnel at the C&H appointed service center：
①Where is full of oil;
② Alkaline soil off the sea;
③ Where there is sulfur gas(like sulfur hot spring);
④Where there are devices with high frequency (like wireless devices, electric welding devices, or
medical equipments);
⑤ Special circumstances.
2 Electric Wiring
a. The installation must be done in accordance with the national wiring regulations.
b. Only the power cord with the rated voltage and exclusive circuit for the air conditioning can be used.
c. Do not pull the power cord by force.
d. The electric installation should be carried out by the professional personnel as instructed by the local
laws, regulations and also this manual.
e. The diameter of the power cord should be large enough and once it is damaged it must be replaced by
the dedicated one.
f. The earthing should be reliable and the earth wire should be connected to the dedicated device of the
building by the professional personnel. Besides, the air switch coupled with the leakage current protection
switch must be equipped, which is of enough capacity and of both magnetic and thermal tripping functions in
case of the short circuit and overload.
3 Earthing Requirements
a. The air conditioner is classied into the Class I appliances, so its earthing must be reliable.
b. The yellow-green line of the air conditioner is the earth line and can not be used for other purpose, cut
off or xed by the self-tapping screw; otherwise it would cause the hazard of electric shock.
c. The reliable earth terminal should be provided and the earth wire can not be connected to any of the
following places：

Installation Location and Matters Needing Attention
3
①Running water pipe;
②Coal gas pipe;
③Sewage pipe;
④Other places where the professional personnel think unreliable.
4 Accessories for Installation
Refer to the packing list for the accessories of the indoor and outdoor units respectively.

Installation Instructions
4
ⅢInstallation Instructions
1 Outline Dimension Drawings of the Indoor Unit
Note: the unit in the followings gures is mm, unless otherwise specied.
Fig.1 is applicable to CHML-ID09NK,CHML-ID12NKCHML-ID18NK,
CHML-ID21NK, CHML-ID24NK :
Fig.1
Table 1: Outline Dimensions ：
Item
Model A B C D E F G H I J
CHML-ID09NK
742 491 662 620 700 615 782 156 200 635
CHML-ID12NK
CHML-ID18NK 942 491 862 820 900 615 982 156 200 635
CHML-ID21NK
1142 491 1062 1020 1100 615 1182 156 200 635
CHML-ID24NK
2 Dimension Requirements on the Installation Space of the Indoor Unit
Nut with washer
Spring pad
＞500 ＞250
Fig. 2

Installation Instructions
5
3 Installation of the Indoor Unit
a. Requirements on the Installation Location
1) Ensure the hanger is strong enough to withstand the weight of the unit.
2) The drainage of the drain pipe is easy.
3) No obstacle is in the inlet/outlet and the air circulation is in good condition.
4) Ensure the installation space shown in Fig.2 is left for the access to maintenance.
5) It should be far away from where there is heat source, leakage of inammable, explosive substances,
or smog.
6) It is the ceiling type unit (concealed in the ceiling).
7) The power cords and connection lines of the indoor and outdoor units must be at least 1m away from
the TV set or radio to avoid the image interference and noise ( even if 1m is kept, the noise may be produced
due to the strong electric wave).
b. Installation of the Indoor Unit
1) Insert the M10 expansion bolt into the hole, and then knock the nail into the bolt. Refer to the Outline
Dimension Drawings of the Indoor Unit for the distance between holes and see Fig.3 for the installation of the
expansion bolt.
Air conditioning unit
Hanger bolt
Anchor
Fig.3 Fig.4
Install the hanger on the indoor unit, as shown n Fig.4.
Install the indoor unit on the ceiling, as shown in Fig.5.
Fig.5
CUATION ！
① .
Prior to the installation, please make a good preparation for all piping (refrigerant pipe, drain pipe)
and wiring (wires of the wired controller, wires between the indoor and outdoor unit) of the indoor unit to
make the further installation much easier.

Installation Instructions
6
② .
If there is an opening in the ceiling, it is better to reinforce it to keep it at and prevent it vibrating.
Consult the user and builder for more details.
③ .
If the strength of the ceiling is not strong enough, a beam made of angle iron can be used and then x
the unit on it.
④ .
If the indoor unit is not installed in the air conditioning area, please use sponge around the unit to
prevent condensing. The thickness of the sponge depends on the actual installation environment.
4 Horizontality Check of the Indoor Unit
After the installation of the indoor unit, its horizontality must be checked to make sure the unit keep
horizontal fore and aft and keep an inclination of 5° toward the drain pipe right and left, as shown in Fig.6.
Fig.6
5 Installation of the Air Supply Duct
a. Installation of the Rectangular Air Supply Duct
Fig.7
Table 2
No. Name No. Name
1 Hanger 5 Filter Screen
2 Return Air Duct 6 Main Air Supply Duct
3 Canvas Duct 7 Air Supply Outlet
4 Return Air Inlet 8 Plenum Box
b. Installation of the Round Air Supply Duct

Installation Instructions
7
4
3
2
5
1
876
9
Fig.8
No. Name No. Name
1 Hanger 6Transition Duct
2 Return Air Duct 7Air Supply Duct
3 Canvas Duct 8Diffuser
4 Return Air Louver 9Diffuser Joint
5 Air Supply Outlet
Table 3
c. Installation Steps of the Round Air Supply Duct
1) Preinstall the outlet of the round duct on the transition duct and then x it by the self-tapping screw.
2) Place the transition duct to the air outlet of the unit and x it with rivet.
3) Connect the outlet to the duct and then tighten them with tape. Other installation details are not
covered herein.
CUATION ！
① .
The maximum length of the duct means the maximum length of the air supply duct plus the maximum
length of the return air duct.
② .
For the unit with the auxiliary electric heating function, if the round duct is to be adopted, then the
straight length of the transition duct can not be less than 200mm.
③ .
The duct is either rectangular or round and connected with the air inlet/outlet of the indoor unit.
Among all air supply outlets, at least one should be kept open. As for the round duct, it needs a transition duct
of which the size should match with the air supply outlet of the unit. After the tting of the transition duct, it is
the turn of the round duct, which is better to be kept 10 meters far away from the corresponding diffuser. The
standard accessories supplied by C&H is the transition duct 200mm long and round air outlet φ200, however,
those of other specications can be purchased.
6 Drawings of the Air Supply Outlet and Return Air Inlet
capacity:2.5~7.1kW
Fig.9 Air Supply Outlet Fig.10 Return Air Inlet

Installation Instructions
8
Table 4 Dimensions of the Air Supply Outlet and Return Air Inlet (unit: mm)
Item
Model
Air Supply Outlet Return Air Inlet
A B C D
CHML-ID09NK
156 662 580 162
CHML-ID12NK
CHML-ID18NK 156 862 780 162
CHML-ID21NK
156 1062 980 162
CHML-ID24NK
7 Installation of the Return Air Duct
a. The default installation location of the rectangular ange is in the back and the return air cover plate is
in the bottom, as shown in Fig.11.
Rectangular Flange
Backward Return Air
Downward Return Air
Return Air Cover Plate
Fig.11
b. If the downward return air is desired, just change the place of the rectangular ange and the return air
cover plate.
c. 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 the sake of the convenience to freely adjust the height, a cutting of canvas duct will be
helpful, which can be reinforce and folded by ８＃ iron wire.
d. More noise is likely to be produced in the downward return air mode than the backward return air
mode, so it is suggestive to install a silencer and a plenum box to minimize the noise.
e. The installation method can be chose with considering the conditions of the building and maintenance
etc., as shown in Fig.12.
1
2
54
461
53
Fig.12
Table 5 Parts and Components of the Return Air Duct
No. Name No. Name
1Return Air Louver(with the lter screen) 4 Indoor Unit
2 Canvas Duct 5 Air Supply Duct
3 Return Air Duct 6 Access Grille

Installation Instructions
9
8 Installation of the Condensate Pipe
a. The condensate pipe should keep a inclination angle of ５～１０° , which can facilitate the drainage
of the condensate water. And the joints of the condensate pipe should be insulated by the insulation material to
prevent condensing(see Fig.13).
Insulating Layer for the Condensate Pipe
Pipe Lid
Fig.13 Thermal Insulation of the Condensate Pipe
b. There is a condensate outlet on both left and right sides of the unit. Once one is conrmed to be used,
the other should be clogged by a rubber plug, bundled by the binding wire and insulated by the insulation
material to avoid water leakage.
c. The right outlet is defaulted to be clogged with a plug.
CUATION ！
No water leakage is allowed on the joint of the condensate pipe.
9 Design of the Drain Pipe
a. The drain pipe should always keep an inclination angle(1/50 ～1/100) to avoid the water gathering in
some certain place.
b. During the connection of the drain pipe and device, do not impose too much force on the pipe on one
side of the device and the pipe should be xed as close as to the device.
c. The drain pipe can be the ordinary hard PVC pipe which can be purchased locally. During the
connection, inset the end of the PVC pipe to the drain outlet, then tighten it with the drain hose and binding
wire but never connect the drain outlet and the drain hose by adhesive.
d. When the drain pipe is used for multiple devices, the public section of the pipe should be 100mm lower
than the drain hole of each device and it is better to use the much thicker pipe for such a purpose.
10 Installation of the Drain Pipe
a. The diameter of the drain pipe should be larger or equal to that of the refrigerant pipe (PVC pipe, outer
dimater:25mm, wall thickness ≥1.5mm.
b. The drain pipe should be as short as possible and with at least a 1/100 degree of slope to avoid forming
air pockets.
c. If the proper degree of slope of the drain pipe is not allowed, a lift pipe should be installed.
d. A distance 1-1.5m should be kept between the hangers to avoid the drain hose making a turn.
1~1.5m

Installation Instructions
10
(Right) with a min. degree of slope 1/100
(Wrong)
Fig.14
e. Insert the drain hose into the drain hole and tighten it with clamps.
f. Wrap the clamps with large amount of sponge for thermal insulation.
g. The drain hose inside the room also should be insulated.
Clamp (accessory)
Sponge (gray)D rain Hose
Sponge (accessory)
Clamp
(accessory)
Max. 4mm
Fig.15
11 Precautions for the Lift Pipe
The installation height of the lift pipe should be less than 850mm. It is recommended to set an inclination
angle 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 800mm.
1°～2°
1~1.5m
≤1000mm
≤850mm
≤300mm
150mm
①②
Ceiling
Clamp (accessory)
Drain Hose (accessory)
Lift Pipe
Hanger Bracket
Fig.16
Notes:
① .
The inclination height of the drain hose should be within 75mm so that the outlet of the drain hose
does not suffer the external force.
② .
If multiple drain pipes converge, please follow the installation steps below.

Installation Instructions
11
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
Fig.17
12 Test for the Drainage System
a. After the electric installation, please take a test for the drainage system.
b. During the test, check if the water ow goes through the pipe correctly and observe carefully the joint
to see if it leaks or not. If this unit is installed in the newly built house, it is suggested to take this test prior to
the ceiling decoration.
13 Piping
a. Let the are end of the copper pipe point at the screw and then tighten the screw by hand.
b. After that, tighten the screw by the torque wrench unit it clatters (as shown in Fig.18).
Fig.18
Table 6 Moments of Torque for Tightening Screws
Diameter of Pipe(mm) Moment of Torque (N·m)
φ6.35 15-30
φ9.52 35-40
φ12 45-50
φ15.9 60-65
c. The bending degree of the pipe can not be too small; otherwise it will crack. And please use a pipe
bender to bend the pipe.

Installation Instructions
12
d. Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.
CUATION ！
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 then would result in leakage.
② .
The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of
it.
14 Insulation for the Refrigerant Pipe
a. The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent
condensing and leaking.
b. The joints of the indoor unit should be wrapped with the insulating material and no gas is allowed on
the joint of the indoor unit, as shown in Fig.19.
No gap
Fig.19
CUATION ！
After the pipe is protected well enough, never bend it to form a small angle; otherwise it would crack or
break.
c. Wrapping the pipe with tape.
1) Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe
to prevent the condensate water overowing.
2) Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall.
During the wrapping, the later circle should cover half of the former one.
3) Fix the wrapped pipe on the wall with clamps.
CUATION ！
① .
Do not wrap the pipe too tightly; otherwise the insulation effect would be weakened. Additionally,
make sure the drain hose is separated from the pipe
② .
After that, ll the hole on the wall with sealing material to prevent wind and rain coming into the
room.
15 Wiring between the Wire and the Wiring Terminal
a. Wiring of the Single-Core Wire
1) Strip the insulating layer at the end of the wire about 25mm off with a wire striper.
2) Loosen the screw off on the wiring board of the air conditioning unit.
3) Shape with the pliers the end of the wire to a circle matching with the size of the screw.
4) Let the screw go through the circle of the wire and then x it on the wiring board.
b. Wiring of the Multi-Core Wire
1) Strip the insulating layer at the end of the wire about 100mm off with a wire striper.
2 Loosen the screw off on the wiring board of the air conditioning unit.
3) Fix a wiring terminal matching with the size of the screw to the end of the multi-core wire with the

Installation Instructions
13
crimpling pliers.
4) Let the screw go through the terminal of the multi-core wire and then x it on the wiring board.
Fig.20
WARNING!
① .
If the power cord or the signal line is damaged, they must be replaced with the dedicated one.
② .
Prior to the wiring, please check the voltage marked on the nameplate and then carries out the wiring
following the wiring diagram.
③ .
The dedicated power cord must be used for the air conditioning unit and the leakage current
protection switch and air switch must be installed in case of the overload condition.
④ .
The air conditioning unit must be earthed to prevent the hazard caused by the failed insulation.
⑤ .
During the wiring, the wiring terminal or the single-core wire must be used; the direct wiring between
the multi-core wire and wiring board would cause re.
⑥ .
All wiring should be done strictly in accordance with the wiring diagram; otherwise the improper
wiring would cause the air conditioning unit running abnormally or damaged.
⑦ .
Do not let the electric wires touch the refrigerant pipe, the compressor, the fan or other moving parts.
⑧ .
Do not modify the wiring inside the indoor unit randomly; otherwise the manufacturer won’t assume
any responsibility for the damage or abnormal running of the unit.
16 Wiring of the Power Cord (single-phase)
CAUTION!
The power supply for each indoor unit must be uniform.
① .
Dismantle the cover of the electric box of the indoor unit.
② .
Let the power cord go through the rubber ring.
③ .
Connect the wiring (communication) through the piping hole of the chassis and the bottom of the
appliance upward, then connect the brown wire to the Terminal board “3”;black wire(the communication wire)
to the Terminal board“2”;blue wire to the Terminal board“N(1)”,and connect the earthing wire to the screw
terminal on the electric box. Clamp them with the corresponding wire clamp packed in the chassis.
④ .
Fix the power cord tightly with the binding wire.

Installation Instructions
14
CHML-U36NK4
POWER
INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C INDOOR UNIT D
XT5X T4 XT3X T2 XT1
OUTDOOR UNIT
NL
Fig.21
CHML-U42NK5
POWER
INDOOR UNIT AINDOOR UNIT BINDOOR UNIT CINDOOR UNIT D
OUTDOOR UNIT
INDOOR UNIT E
XT2
XT1
XT3
XT4
XT5
XT6
N
L
Fig.22

Installation Instructions
15
17 Wiring of the Signal Line of the Wired Controller
1) Open the cover of the electric box of the indoor unit.
2) Let the signal line go through the rubber ring.
3) Insert the signal line to the four-pin socket on the printed circuit board of the indoor unit.
4) Fix the signal line with the binding wire.
18 Electric Installation
Table 7
Indoor Unit
Power Cord
Running
Current
(A)
Input Power(W) Recommended
Power Cord
(Sectional
Area× Pieces)
Type Model
Indoor
Fan
Motor
Cooling Heating
Cooling
and
Heating
CHML-ID09NK 220-240V~ 50Hz 0.406 75 575 1.0×4
CHML-ID12NK 220-240V~ 50Hz 0.348 65 865 1.0×4
CHML-ID18NK 220-240V~ 50Hz 0.428 80 1080 1.0×4
CHML-ID21NK 220-240V~ 50Hz 0.588 110 1610 1.0×4
CHML-ID24NK 220-240V~ 50Hz 0.588 110 1610 1.0×4
Notes：
The sectional area listed above is applicable to the power cord with at most a length of 15 meters. For the
longer cord, its sectional area should be enlarged to avoid the cord burning out caused by the over-current.

Rated Working Conditions
16
ⅣRated Working Conditions
Table 8 Working Temperature Range
Indoor side state Outdoor side stae
Dry bulb temp. ℃Wet bulb temp. ℃Dry bulb temp. ℃Wet bulb temp. ℃
Rated Cooling 27 19 35 24
Max. cooling 32 23 48 26
Min. cooling 21 15 18 —
Rated Heating 20 15 7 6
Max. heating 27 —24 18
Min. heating 20 15 －15 －16