Cooper & Hunter CH-CH8SNM User manual

Thank you for choosing Cooper&Hunter air conditioner, please read this service manual
carefully before operation and retain it for future reference.
MINI CHILLER
Service manual
Mini Chiller
Models:
CH-CH8SNM
CH-CH10SNM
CH-CH12.5SNM
CH-CH15SNM
CH-CH22MNM
CH-CH25MNM
CH-CH35MNM
CH-CH45MNM

CONTENTS
PRODUCT......................................................................................................2
1 MODELS LIST .......................................................................................................... 2
2 NOMENCLATURE..................................................................................................... 3
3 FUNCTION ................................................................................................................ 4
4 PRODUCT DATA....................................................................................................... 5
5 PIPING DIAGRAM..................................................................................................... 7
UNITS CONTROL..........................................................................................9
1 OPERATION FLOWCHART...................................................................................... 9
2 MAIN LOGIC.............................................................................................................11
3 WIRED CONTROLLER .......................................................................................... 13
4 CONTROL WIRING DESIGN .................................................................................. 17
UNITS INSTALLATION ...............................................................................19
1 UNITS INSTALLATION............................................................................................ 19
2 WATER PIPING WORK........................................................................................... 24
3 ELECTRIC WIRING WORK..................................................................................... 24
UNITS MAINTENANCE ..............................................................................30
1 ERROR CODE LIST................................................................................................ 30
2 FLOW CHART OF TROUBLESHOOTING.............................................................. 31
3 DISASSEMBLYAND ASSEMBLY PROCEDURE OF MAIN PARTS....................... 33
4 EXPLODED VIEWS AND PART LIST...................................................................... 45

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PRODUCT

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PRODUCT
1 MODELS LIST
1.1 Split Type
Model Nominal
Capacity Power Supply Appearance
Refrigerant Model Name kW (V,Ph,Hz)
R410A
CH-CH8SNM
CH-CH8SNM(I)
7.5
380-415V 3Ph 50Hz
CH-CH8SNM(O)
CH-CH10SNM
CH-CH10SNM(I)
10.0
CH-CH10SNM(O)
CH-CH12.5SNM
CH-CH12.5SNM(I)
12.5
CH-CH12.5SNM(O)
CH-CH15SNM
CH-CH15SNM(I)
14.2
CH-CH15SNM(O)
Note:1Ton =12000Btu/h = 3.517kW

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1.2 Integral Type
Model Nominal
Capacity Power Supply Appearance
Refrigerant Model Name kW (V,Ph,Hz)
R410A
CH-CH22MNM 21.5
380-415V 3Ph 50Hz
CH-CH25MNM 22.8
CH-CH35MNM 31
CH-CH45MNM 42
Note:1Ton =12000Btu/h = 3.517kW
2 NOMENCLATURE
1.1 Split Type
Description Options
1
Mini chiller
-
2
3 Nominal Cooling Capacity
8:7.5kW=2.13RT
10:10 kW=2.84RT
12.5:12.5kW =3.55RT
15:14.2kW=4.04RT
4 Performance type M=Monoblock
S=Split
5
6
Refrigerant N=R410A
7
Voltage M=380-415V 3Ph 50Hz
NO.
CHCH 10SNM(I)
12345 6 7
-
Cooper&Hunter
Unit type I=Indoor; O=Outdoor
-

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PRODUCT
1.2 Integral Type
CHNCH25M- M
1 2 3 4 5 6
NO. Description Options
1 Cooper&Hunter -
2
3 Nominal Cooling Capacity
22:21.5kW=6.11RT
25:22.8kW=6.48RT
35:31kW=8.82RT
45:42kW=11.94RT
4 Perfomance Type M=Monoblock
S=Split
5 Refrigerant N=R410A
6 Voltage M=380-415V 3Ph 50Hz
3 FUNCTION
Indoor Unit Type Function Description
Split Type
Heating/Cooling
Interface kit for up to 16 indoor units
Memory restart
Two circuits optimized design
Low noise design
Safety and reliability thanks to advance
compressor balance control
Integral Type
Mini chiller -

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PRODUCT
4 PRODUCT DATA
4.1 Product Data at Rated Condition
4.1.1 Split Type
Models CH-CH_SNM
8 10 12.5 15
Nominal Capacity
Cooling
kW 7.5 10 12.5 14.2
Btu/h 25590 34120 42650 48450
RT 2.13 2.84 3.55 4.04
Heating
kW 9 12 13 16.5
Btu/h 30708 40944 44356 56298
RT 2.56 3.41 3.70 4.69
Power Consumption Cooling kW 3.5 4.4 5.7 5.7
Heating kW 3.3 4.4 4.8 5.3
Power Supply 380-415V,3Ph,50Hz
Safeties
high-pressure protection,low-pressure protection,exhaust temp. protection,overload
protection,antifreeze protection
Refrigerant Type R410A
Charge kg 3.10 3.55 4.50 5.00
Compressor Type Constant Speed scroll
NO. 1 1 1 1
Evaporator Heat Exchanger Tube-in-Tube
Water In/Out
Pipe Diameter Inch 1"Female BSP 1"Female BSP 1"Female BSP 1"Female BSP
Condenser
Heat Exchanger Aluminum n-copper tube
Fan Motor Power Input kW 0.092 0.068 0.092 0.092
Fan quantity 12 2 2
Pump
Water Flow L/s 0.38 0.48 0.59 0.72
GPM 5.0 6.3 7.79 9.5
Delivery Lift m18 18 18 18
Power Input kW 0.55 0.55 0.55 0.55
Expansion Vessel Volume L5 5 5 5
Indoor
Unit
Unit /
Packing
Dimension
Width mm 1100/1285 1100/1285 1100/1285 1100/1285
Depth mm 450/682 450/682 450/682 450/682
Height mm 288/385 288/385 288/385 288/385
Net/Gross Weights kg 84/96 84/96 84/96 84/96
Outdoor
Unit
Unit /
Packing
Dimension
Width mm 950/1110 950/1110 950/1110 950/1110
Depth mm 412/450 412/450 412/450 412/450
Height mm 840/985 1250/1385 1250/1385 1250/1385
Net / Gross Weights kg 90/100 112/123 115/129 119/129

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PRODUCT
4.1.2 Integral Type
Models CH-CH_MNM
22 25 35 45
Nominal
Capacity
Cooling
kW 21.5 22.8 31 42
Btu/h 73358 77794 105772 143304
RT 6.11 6.48 8.82 11.94
Heating
kW 25 25 37.5 49
Btu/h 85300 85300 127950 167188
RT 7.11 7.11 10.66 13.93
Power
Consumption
Cooling kW 8.6 8.8 11.9 18.3
Heating kW 8.6 8.9 12.5 17.5
Power Supply 380-415V 3Ph 50Hz
Safeties high-pressure protection,low-pressure protection,exhaust temp. protection,overload
protection,antifreeze protection
Refrigerant Type R410A
Charge kg 3.6×2 4.8×2 6.5×2 7.3×2
Compressor Type Constant Speed scroll
NO. 2 2 2 2
Evaporator
Heat Exchanger Tube-in-Tube Tube-in-Tube Dry Expansion
Evaporator Dry Expansion
Evaporator
Water In/
Out Pipe
Diameter Inch 1"Female BSP 1"Female BSP 1-1/2"Female BSP 1-1/2"Female BSP
Condenser
Heat Exchanger Aluminum n-copper tube
Fan Motor
Power Input kW 0.4 0.4 0.6 0.8
Pump
Water Flow L/s 0.92 1.2 1.4 2.2
GPM 4.06 5.29 6.17 9.7
Delivery Lift m22 24 25 27
Power Input kW 0.75 0.75 1.5 1.5
Expansion Vessel Volume L8 8 8 8
Unit / Packing
Dimension
Width mm 1460/1540 1460/1540 1750/1910 1750/1910
Depth mm 530/710 530/710 800/960 800/960
Height mm 1850/2100 1850/2100 1760/1970 1760/1970
Net/Gross Weights kg 380/387 380/392 680/690 755/765
Notes：
a. Cooling capacity is based on the following conditions：leaving chilled water temp.7℃,outdoor air temp. 35℃.
b. Heating capacity is based on the following conditions：leaving warmed water temp.45℃, outdoor air temp. 7℃.
c. Water ow range for operation must be from 70% to 120% of the rated water ow.
d. The maximum allowable pressure for water pipe is 0.9MPa.

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4.2 Operation Range
Mode Range of Outdoor Temperature (℃)
Cooling 16~43
Heating -15~28
4.3 Electrical Data
4.3.1 Split Type
Model Rated Power
Supply
Compressor Fan Motor Pump Total
Outdoor
NO. LRA each
(A) MRC each (A) NO. MRC (A) MRC (A) MRC (A) NRC (A)
CH-CH8SNM
380-415V
3Ph 50Hz
1 65 9.1 1 1.5 0.7 9.4 7.0
CH-CH10SNM 1 66 11.6 2 2.0 0.7 13.0 8.5
CH-CH12.5SNM 1 67 13.7 2 2.0 0.7 14.5 10.5
CH-CH15SNM 1 67 13.7 2 2.0 0.7 14.5 10.5
4.3.2 Integral Type
Model Rated Power
Supply
Compressor Fan Motor Pump Total
NO. LRA each
(A)
MRC each
(A)
NO. MRC
(A) MRC (A) MRC (A) MRC (A)
CH-CH22MNM
380-415V
3Ph 50Hz
2 73 11.6 2 5.0 1.5 19.5 14.5
CH-CH25MNM 2 66 13.5 2 5.0 1.5 23.5 18.5
CH-CH35MNM 2 101 16.4 2 7.5 3.0 28.5 24.5
CH-CH45MNM 2 110 22.5 2 7.5 3.0 45.0 31.0
Notes:
a. LRA: Locked rotor amps (A).
b. MRC: Maximum running current (A).
c. NRC: Nominal running current (A).
5 PIPING DIAGRAM

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CONTROL

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UNITS CONTROL
1 OPERATION FLOWCHART
1.1 Cooling Operation

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1.2 Heating Operation

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2 MAIN LOGIC
2.1 Cooling Mode
When pressing ON button, if the outdoor temperature is above 16℃, water pump will start rst. After 30s, if
the outlet water temperature meets the cooling running requirements, the fans of outdoor unit will start. Then the
compressor will run in 15s. During the period of cooling, the unit will be turned off if the outlet water temperature
meets the stopping requirements and the running time of compressor is over the shortest running time required.
The fans of outdoor unit will stop in15s.
If the outdoor temperature is below 16℃, the unit will stop, and all loads except the water pump will be turned off.

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2.2 Heating Mode
When pressing ON button, if the outdoor temperature is below 28 ℃, the water pump will start rst .After
30s, if the outlet water temperature meets the heating running requirements, the fans of outdoor unit will start.
Then the compressor will run in 15s. During the period of cooling, the unit will be turned off if the outlet water
temperature meets the stopping requirements and the running time of compressor is over the shortest running
time required. The fans of outdoor unit will stop in15s.
If the outdoor temperature is over 28℃, the unit will stop, and all loads except the water pump will be turned off.
2.3 Defrosting Mode
The condition of start defrosting mode:
Under heating mode, if the accumulative running time of compressor is over the set interval time of
defrosting(default 45min), and the defrosting temperature is lower than the set starting temperature (default -4℃) ,the
unit will start running defrosting mode, and the 4-way valve will shut off and the outdoor fan will stop after 2s.
The condition of quit defrosting mode:
Under defrosting mode, if the continual defrosting time is over the set continual time of defrosting (default 8min),
and the defrosting temperature is over the set stopping temperature(default 20℃), the unit will restart running heating
mode, and the 4-way valve will turn on and the outdoor fan will run.

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3 WIRED CONTROLLER
3.1 Dimension
20.4
3.2 Function
3.2.1 Operation View
EXIT

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CONTROL
NO. Name Function description
1 MODE button It can switch between cooling and heating, this button is available only on cooling and heating unit.
2 CHECK button
Press it once under normal state to enter check mode, under check mode, press this button when “17”
is displayed can change the value of “17”. Under parameter set mode, press this once can switch
the adjusting objection between parameter and value, press this button for long (about 5s) to save
and quit this parameter setting.
3 Increasing button To increase present set value or change set/check object.
4 Decreasing button To decrease present set value or change set/check object.
5 EXIT button Under Set and Check mode, press it once to quit this mode. Under parameter set mode, this set value would not be saved. Press this button for long (about 5s) to set sound, and make sound
switches between always on and always off.
6 ON button To turn on the unit; when under compel operation, press it once to quit compel operation.
7 OFF button To turn off the unit; press it once to quit compel operation when the unit is under compel operation.
8 LCD display Display information of the unit.
Notes:
a. Turn On, Off Auxiliary Heater: It is only available for heat pump unit. Press Check once to enter Check
mode. Press ▲and ▼to change check object, press Check again till the present check object becomes
“17”, value “17” switches between 01/03 (auxiliary heater on) and 00/02 (auxiliary heater off). That is 00
Off →01 On →00 Off, or 02 Off →03 On →02 Off.
b. Check Parameter:After electrify for 20s, press EXIT then ▲ to enter parameter checking mode. Under this
mode, Auxiliary display area shows the checking object, Main display area displays the value for the
checking object. Press ▲and ▼to change the checking object. Press EXIT to quit from the check mode.
EXIT

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NO. Name Function description
1 Running mode display : cooling mode, : heating mode
2 Temp display It shows temperature value displays at main display area.
3 Auxiliary display area It contains 2 numbers and a comma, for showing temperature and number of parameter at main
display area. It only displays when under Check mode and Parameter checking mode.
4 Main display area
It contains a minus, 2 numbers and 1 temperature unit, for displaying value of temperature and
parameter (temperature or time value) and error code. When temperature value is displayed, it
shows value in algorism and temperature unit; when time is displayed, it shows algorism value
but no temperature unit (default unit is min); when it is code, it displays specific error (refer to
Malfunction Error List) but no temperature unit. Individual temperature or parameter may exceed
99, then adopt AX for 100 ～109, bX for 110 ～119, CX for 120 ～129, dX for 130 ～139, EX for
140 ～149, FX for 150 ～159, and X stands for a number between 0 ～9. Under normal state, it
shows temperature for back water.
5 Parameter display It means the value shown at present main display area is parameter. It shows only under
Parameter Check mode.
6 Defrost display It displays when defrosting, otherwise it doesn’t displays.
7 System ID It displays when system or compressor orders, for showing which system is defrosting.
8 Testing display For testing, it displays under compel operation.
9 Error code display It shows the error code displayed on Main Display Area. It displays when there is error at system
or communication.
Caution:
a. When unit is off, it displays only temperature of back water. When unit is on, under normal state, if there
is no error, it displays temperature of back water, if there is error, it displays error code; when there is no
operation after 60s of pressing the button, it quit back to normal state display automatically.
Auto antifreeze operation display (only for heat pump unit)
b. When auto antifreeze function is started and relevant conditions are satised, unit begins auto antifreeze
operation. At this time, LCD main display area displays code d2 (if there is error it displays error code).
3.3 Installation
a. First select an installation position. According to the size of the communication line of the wire controller,
leave a recess or an embedded wire hole to bury the communication line.
b. If the communication line between the wire controller (85×85×20.4) and the indoor unit is surface-
mounted, use 1# PVC pipe and make matching recess in the wall (refer to Figure 6); If concealed
installation is adopted, 1# PVC pipe can be used (Refer to Figure 7).
c. No matter if surface mounting or concealed mounting is selected, it is required to drill 2 holes (in the same
level) which distance shall be the same as the distance (60mm) of installation holes in the bottom plate of the
wire controller. Then insert a wood plug into each hole. Fix the bottom plate of the wire controller to the wall
by using the two holes. Plug the communication line onto the control panel. Lastly install the panel of the wire
controller.
Caution:
During the installation of the bottom plate of the wire controller, pay attention to the direction of the bottom
plate. The plate’s side with two notches must be at the lower position, and otherwise the panel of the wire
controller cannot be correctly installed.

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Fig 8 Schematic Diagram of Installation
No. Name
1 Wall Surface
2 Bottom Plate of Wire Controller
3 Screw M4×10
4 Panel of Wire Controller
Caution:
a. The communication distance between the main board and the wire controller can be as far as 20m (The
standard distance is 8m).
b. The wire controller shall not be installed in a place where there is water drop or large amount of water vapor.

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4 CONTROL WIRING DESIGN
The controllers of the split type unit include manual controller, indoor unit controller and outdoor unit
controller. The indoor unit controller communications with manual controller and outdoor unit controller in
RS485. The indoor unit controller connects manual controller with 4-line twisted-pair. Similarly, the indoor unit
controller connects outdoor unit controller with 4-line twisted-pair.
Indoor Unit Controller
The controllers of the Integral type unit include manual controller and outdoor unit controller. The manual
controller communications with outdoor unit controller in RS485. The manual controller connects outdoor unit
controller with 4-line twisted-pair.

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INSTALLATION