Cooper & Hunter CH-HP20CMFNM User manual

Models: CH-HP20CMFNM
CH-HP30CMFNM
CH-HP40CMFNM
Thank you for choosing Air Source Heat Pump Water Heater, please read this owner’s manual
carefully before operation and retain it for future reference.
Circulating Air Source Heat Pump
Water Heater Owner’s Manual
Библиотека СОК 

Preface
Dear users:
Welcome to use the C&H circulating air source heat pump water heater. Please read carefully
the instructions before installation and operation. Install and operate it according to the steps
provided in this manual, thus you can master and operate the unit properly.
Please pay attention to the following marks:
Warning: This symbol indicates the possibility of death or series injury.
Caution: This symbol indicates the possibility of injury or damage to property.
Warning:
（1）Installation work must be conducted by the appointed maintenance center. Improper
installations might cause water leakage, electric shock, fire and other accidents.
（2）Be sure not to store or use dangerous materials such as flammable, explosive and
poisonous objects near the unit.
（3）Turn off the main power of the water heater immediately upon malfunction (such as
combustion is smelled and so on).
（4）Do not insert your fingers or other objects into the air outlet or air-in grille.
（5）Do not start or stop the unit through the way of inserting or pull out power cord.
（6）Do not refit, repair or move the unit. If it needs to be repaired, please contact dealer or
professional installer.
（7）Earthing device must be set for hot water unit, heating water tank, thermal storage water
tank, water pump and system pipe network.
Caution:
（1）Before installation, please check whether the power is consist with that required on the
nameplate, and then check the safety of the power.
（2）Before operation, please check and confirm whether electric wires and water pipes are
connected correctly for preventing water leakage, electric shock, fire hazard and other accidents.
（3）The power socket must be equipped with earthing wire for ensuring reliable grounding for
unit and preventing electric shock. Do not connect earthing wire to gas pipe, tap water pipe,
lightening conductor or telephone wires.
（4）Do not operate the unit with wet hands. Do not let children play with the unit.
（5）Turn on or turn off the unit in this instruction manual is turning on or turning off the
controller; Cut off the power indicates stop supplying power to the unit.
（6）Do not expose this unit in damp environment directly.
（7）If the outdoor ambient temperature is low in winter, do not cut off the power after stop
operation. Otherwise, freeze prevention protection will be invalid.
（8）If the unit won’t be used for a long time, please drain the residual water inside unit, water
tank and pipeline through drainage valve.
（9）Please conduct leakage inspection after installation.
This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental 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
Correct Disposal of this product
GWP:R410A:2087.5
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.
When there’re any problems, please contact dealer, appointed maintenance center or office.
You can also contact our company directly.

Contents
1 Product summary.......................................................................................................................... 1
1.1 Working principle and applicable areas....................................................................... 1
1.2 Principle diagram of system ........................................................................................ 1
1.3 Product features .......................................................................................................... 1
2 Unit introduction .......................................................................................................................... 2
2.1 Outside drawing of unit................................................................................................ 2
2.2 Parameters table of unit............................................................................................... 2
2.3 Specification correction table for the unit..................................................................... 4
2.4 Schematic plan for the unit outline .............................................................................. 5
3 Installation requirement for the unit ........................................................................................... 6
3.1 Before installation ........................................................................................................ 6
3.2 Position before installation........................................................................................... 6
3.3 Movement and installation of the unit.......................................................................... 6
3.4 Installation space......................................................................................................... 7
3.5 Installation of circulating water system........................................................................ 8
3.6 Install the water flow switch......................................................................................... 9
3.7 Construction and installation for the heating water tank ........................................... 10
3.8 System installation diagram and instruction...............................................................11
4 Electric installation ..................................................................................................................... 16
5 DIP switch setting on main board............................................................................................... 20
6 Debugging, daily operation and maintenance ........................................................................... 22
6.1 Before debugging ...................................................................................................... 22
6.2 Test run ...................................................................................................................... 22
6.3 Daily operation and maintenance.............................................................................. 23
7 Troubleshooting.......................................................................................................................... 23
8 Error code ................................................................................................................................... 25

Circulating Air Source Heat Pump Water Heater
1
1 Product summary
1.1 Working principle and applicable areas
Circulating air source heat pump water heater adopts the heat pump principle, consume some
electricity as complement and get the heat through ambient low-grade energy (low-temperature air
energy) through thermal circulation. Transmit the heat to condenser through compressor and then
release high-temperature thermal source for generating hot water. The working principle is same as that
for heat pump air conditioner. The different is that the heat pump air conditioner absorb heat from natural
environment and then supply it to indoor air, while heat pump water heater is using this heat to generate
hot water. Its EER is at least 3 times higher than conventional electric water heater. Heat pump water
heater is a highly efficient, energy saving and environmental friendly product.
This unit is mainly for factory, hotel, restaurant, hospital, beauty parlor, laundry, bath center, large
scale floor heating project and so on.
1.2 Principle diagram of system
Backwater pipe
Condenser Evaporator
Fan
Air source energy input
Electric energy input
Electronic
expansion
valve
Strainer
Compressor
Water supply pipe
Water
tank
Inlet pipe of cold water
Bushing condenser
Exit pipe of hot water
Gas-liquid separator
1.3 Product features
◆High-efficiency and energy-saving
Adopt heat pump technology, which can transfer the consumed electricity into three times of thermal
energy for heat water, high-efficiency and energy-saving. The operation cost is 1/3 of that for electric
water heater and 1/3 of that for gas water heater.
◆Safe and reliable
Electricity is only used as the energy for driving medium, while the energy used for heating water is
absorbed from the air by medium. Therefore, the heating method is indeed water and electricity
separation, safe, stable and reliable.
◆Convenient for installation and convenient for maintenance
The unit can be installed on roof, yard, basement and so on. This unit is with powerful self-diagnosis
function, convenient and easy for maintenance.
◆All-day operation and wide application range
This heat pump water heater takes sensible heat and latent heat in air as the low-temperature
thermal source, which can provide hot water continuously 24 hours a year and all the year around.

Circulating Air Source Heat Pump Water Heater
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◆Intelligent control
Microcomputer control.
Chinese interface for displaying the operation status of the unit.
Multiple module network control can control maximum 16 indoor units; parameters for each unit can
be set freely; Timer ON and timer OFF control function for each day; perfect protection functions for
ensuring reliable operation.
2 Unit introduction
2.1 Outside drawing of unit
CH-HP20CMFNM
CH-HP30CMFNM
2.2 Parameters table of unit
Model
Hot water
mode
Heating capacity
kW
20.22
29.77
40.19
Heating Power Input
kW
8.52
8.87
13.27
Heating Current Input
A
13.9
16.9
26
Nominal Water Output
L/h
602
775
1140
Rated Input
kW
10.1
13.2
19
Rated current Input
A
20
24
38
Set temperature
℃
defaulted at 50℃. 30℃～60℃adjustable (water tank temperature)
Power
380-415V 3N～50Hz
Refrigerant
Name
R410A
R410A
R410A
Refrigerant charge
volume
kg
4.2
4.2
5.9
Compressor
Type
Totally-enclosed scroll compressor
Quantity
Set
1
1
1
Heat exchanger
Wind side
Finned type heat exchanger
Water side
Shell-and-tube heat exchanger
Fan
Type
Low noise axial flow fan
Air discharge type
Top air discharge
CH-HP40CMFNM
CH-HP40CMFNM
CH-HP30CMFNMCH-HP20CMFNM

Circulating Air Source Heat Pump Water Heater
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Airflow(ambient
temperature 25℃)
m3/h
11400
11400
12400
Water system
Circulating Water
Flow
m3/h
4.8
6.2
9.2
Water pressure
kPa
70
130
70
Maximum bearing
pressure
MPa
0.8
0.8
0.8
Diameter of air inlet
pipe and air outlet
pipe
in
G 1-1/4
G 1-1/4
G 2
Outline
dimension
W×D×H
mm
930×800×1605
930×800×1605
1340×800×1605
Packing size
W×D×H
mm
1010×865×1775
1010×865×1775
1420×880×1775
Noise
dB(A)
≤67
≤67
≤67
Net weight
kg
243、242
260、262
358、364
①CH-HP20CMFNM: data in the above table are based on the following test conditions：outdoor ambient
temperature: 7℃DB/6℃WB; initial water temperature: 50℃; outlet water temperature: 55℃; circulating
water flow 4.8m3/h；Voltage: 380V 3N～50Hz.
CH-HP30CMFNM:data in the above table are based on the following test conditions：outdoor ambient
temperature: 7℃DB/6℃WB; initial water temperature: 30℃; outlet water temperature: 55℃; circulating
water flow 6.2m3/h；Voltage: 380V 3N～50Hz.
CH-HP40CMFNM data in the above table are based on the following test conditions：outdoor ambient
temperature: 7℃DB/6℃WB; initial water temperature: 40℃; outlet water temperature: 55℃; circulating
water flow 9.2m3/h；Voltage: 380V 3N～50Hz.
②Applicable range: ambient temperature range is -26°C~46°C.
③The above pressure values all belong to gauge pressure.
④Noise is tested in the semi-silencing room. The actual noise will be a little higher in the actual
operation environment.
⑤Circulating water flow means the rated flow during the heating operation. When selecting the water
pump model, it shall refer to the flow after overcoming the water resistance, that is, the flow of corresponding
delivery lift, rather than the maximum flow labeled in the nameplate of water pump.
⑥The listed water resistance refers to the water resistance under rated working conditions. If the ambient
temperature and water inlet temperature are different, unit’s hot water output will be changed accordingly, and
the water resistance may be different from the listed value.
⑦If the specification is changed due to the product improvement, please refer to the nameplate.
⑧The system reliability and the different water temperature requirement under different water
temperature are considered for this product and limit the maximum water tank temperature for stop operation.
The curve is as below:
Curve of maximum water tank temperature for stop operation with the change of ambient temperature
Ambient
temperature/℃
Tank
temperature/℃
Ambient
temperature/℃
Tank
temperature/℃
Ambient
temperature/℃
Tank
temperature/℃
-26
53
-1
58
24
60
-25
53
0
58
25
60
-24
53
1
58
26
59
-23
53
2
58
27
59
-22
53
3
59
28
58
-21
54
4
59
29
58
-20
54
5
59
30
58
-19
54
6
59
31
57
-18
54
7
60
32
57
-17
54
8
60
33
57
-16
55
9
60
34
56
-15
55
10
60
35
56
-14
55
11
60
36
56
-13
55
12
60
37
55
-12
55
13
60
38
55
-11
56
14
60
39
55

Circulating Air Source Heat Pump Water Heater
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Curve of maximum water tank temperature for stop operation with the change of ambient temperature
Ambient
temperature/℃
Tank
temperature/℃
Ambient
temperature/℃
Tank
temperature/℃
Ambient
temperature/℃
Tank
temperature/℃
-10
56
15
60
40
54
-9
56
16
60
41
54
-8
56
17
60
42
54
-7
57
18
60
43
53
-6
57
19
60
44
53
-5
57
20
60
45
53
-4
57
21
60
46
52
-3
57
22
60
-2
58
23
60
2.3 Specification correction table for the unit
model
Water inlet
temperature(℃)
Circulating water flow 4.8m3/h, Outdoor ambient temperature( wet/dry bulb ℃)
-20
-15
-7/-8
7/6
20/15
30/22
35/24
46/28
Heating
Capacity
(kW)
50
9.94
11.13
13.35
20.22
27.93
30.91
31.67
37.52
40
10.24
12.26
14.63
21.77
28.00
33.81
34.08
38.92
30
10.34
12.48
15.50
22.53
28.65
35.82
34.58
39.32
Heating
Power
Input(kW)
50
7.94
8.03
8.15
8.52
7.63
8.66
8.63
8.95
40
6.63
6.76
6.89
7.28
7.51
7.82
7.27
7.54
30
6.22
6.46
6.62
6.95
7.49
6.76
7.20
7.31
Coefficient
of
performanc
e(W/W)
50
1.25
1.39
1.64
2.37
3.66
3.57
3.67
4.19
40
1.54
1.82
2.12
2.99
3.73
4.32
4.69
5.16
30
1.66
1.93
2.34
3.24
3.83
5.30
4.80
5.38
model
Water inlet
temperature(℃)
Circulating water flow 6.2m3/h, Outdoor ambient temperature( wet/dry
bulb ℃)
-20
-15
-7/-8
7/6
20/15
30/22
35/24
46/28
Heating
Capacity
(kW)
50
12.51
14.00
15.04
26.99
34.89
38.16
38.38
43.27
40
12.70
14.62
18.70
27.73
36.08
41.68
40.41
44.32
30
12.81
15.46
20.76
29.77
39.15
44.85
43.48
47.07
Heating
Power Input
(kW)
50
9.39
9.49
9.62
11.06
11.12
10.91
11.06
11.41
40
7.85
8.00
8.35
9.29
9.46
9.38
9.49
9.73
30
7.34
7.63
8.12
8.87
9.25
9.68
9.26
9.56
Coefficient
of
performance
(W/W)
50
1.33
1.48
1.56
2.44
3.14
3.50
3.47
3.79
40
1.62
1.83
2.24
2.98
3.81
4.44
4.26
4.55
30
1.74
2.03
2.56
3.35
4.23
4.63
4.70
4.92
model
Water inlet
temperature(℃)
Circulating water flow 9.2m3/h, Outdoor ambient temperature( wet/dry
bulb ℃)
-20
-15
-7/-8
7/6
20/15
30/22
35/24
46/28
Heating
Capacity
(kW)
50
17.72
19.84
21.31
38.25
49.44
54.08
54.39
61.32
40
17.88
21.19
27.11
40.19
52.3
60.42
58.57
64.25
30
17.97
21.69
29.12
41.76
54.92
62.91
61
66.03
Heating
Power Input
(kW)
50
13.41
13.55
13.74
15.79
15.88
15.58
15.79
16.3
40
11.21
11.42
11.92
13.27
13.51
13.4
13.55
13.9
30
9.2
9.56
10.17
11.12
11.59
12.13
11.6
11.98
Coefficient of
performance
(W/W)
50
1.32
1.46
1.55
2.42
3.11
3.47
3.44
3.76
40
1.60
1.86
2.27
3.03
3.87
4.51
4.32
4.62
30
1.95
2.27
2.86
3.76
4.74
5.19
5.26
5.51
CH-HP20CMFNM
CH-HP30CMFNM
CH-HP40CMFNM

Circulating Air Sou rce HeatP ump Water Heat er
5
2.4 Schematic plan for the unit outline
Unit：mm
CH-HP40CMFNM
Unit：mm
CH-HP20CMFNM CH-HP30CMFNM

Circulating Air Source Heat Pump Water Heater
6
3 Installation requirement for the unit
Caution:
（1）Improper to operate the unit at the places where there’s strong magnetic field, much salt and
alkali, high acid and unstable voltage.
（2）Confirm the correct transmit path and method for preventing damage and accident.
（3）Confirm whether the installation base is solid. When this unit is installed at the metal part of the
building, it must be electric insulated and comply with related technical standard.
（4）Please make sure the installation position is far away from the storage areas of inflammable
and explosive objects to prevent explosion or fire hazard.
3.1 Before installation
Before installation, the user should open the carton box to check the unit:
（1）Check whether all documents and accessories are complete according to the packing list.
（2）Check the model and specification of the unit basing on the attached documents.
（3）Check whether the unit is in good conditioner and whether the accessories are complete.
（4）Check there’s refrigerant leakage.
（5）If there’s damage or problems, please contact appointed local office of our company in time.
3.2 Position before installation
（1）The unit can be installed on balcony, roof, special flat form or any other places where’s
convenient for installation and bear the weight of the unit.
（2）The unit should be installed the well-ventilated place, and avoid the air discharge and noise
disturb other people. Please pay attention to the wind direction and avoid the strong wind.
（3）When placing the unit on the roof, please pay attention to the wind direction to prevent strong
wind.
（4）There should be no strong thermal source, discharge outlet of other equipments, hot steam and
inflammable gas around the unit.
（5）There should be discharge ditch or discharge outlet nearby the installation position of the unit.
3.3 Movement and installation of the unit
Every unit has been conducted strict test and inspection before ex-factory
for ensuring its specification and quality. User must be careful during installation
and movement to avoid damaging the control system and pipeline parts.
（1）Please adopt fork truck or crane for movement.
（2）Use the canvas gallus or the wire cable with enough strength (＞Φ10)
for handing the unit. Wind the base of the unit with the canvas gallus or the wire
cable and then bundle it tightly, and add protective gasket at the contacting
position between the canvas gallus or the wire cable and the unit for preventing
damage to the unit. When moving the unit, the inclined angle should be less
than 15° and the unit should be moved carefully.
（3）After movement is finished, please remove the underlaid gasket,
gasket of compressor.

Circulating Air Sou rce HeatP ump Water Heat er
7
（4）During installation, use M12 expansion bolt to fix the unit at the independent concrete base.
Y ou can use angle iron or channel steel to make the steel bracket, adding vibration-proof rubber gasket,
and then place it on the ground or roof. Please confirm that the unit is placed horizontally. See below fig.
（5）In case that the water heater is not under the lightning protection of the building, then lightning
protection measures should be taken according to the existing local national standards.
3.4 Installation space
（1） Single unit installation space for CH-HP20CMFNM, CH-HP30CMFNM，CH-HP40CMFNM
Unit：mm
（2）Modular unit installation space for CH-HP20CMFNM, CH-HP30CMFNM， CH-HP40CMFNM
.
Unit：mm

Circulating Air Source Heat Pump Water Heater
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3.5 Installation of circulating water system
(1) Water system design and construction must be complied with the water-heating design
regulation and related standard requirement.
(2) The unit adopts water flow switch as the cut-off protection, which is not equipped with the unit.
Users should install it by themselves. Meanwhile, please ask project installer to adjust the cut-off point.
(3) The pipe diameter for water outlet and water inlet of the unit should be decided by the rated flow
volume and suggested flow speed of the unit. You should try to reduce the resistance of the water
system as much as possible.
Below is the flow speed for the hot water pipe:
Suggested value for the slow speed of the hot water pipe
Diameter（mm）
15～20
25～40
≥50
Flow speed（m/s）
≤0.8
≤1.0
≤1.2
(4) When connecting the water pipe, please use PPR pipe to connect it to the water outlet and water
inlet, and then connect it to the external water pipe.
(5) Water pipe and valve: For ensuring the water system clean, PPR pipe materials should be
adopted. The common valves are cut-off valve, ball valve, check valve, shutoff valve, and so on. Copper
core valve should be adopted. Adopt rubber belt for the thread airproof between valve and connection
pipe to prevent polluting pipeline.
(6) Water pipe should be installed horizontally and reasonably. Try to reduce elbows as much as
possible for decreasing the resistance of water system.
(7) Water pipe must be thermal insulated to prevent heat loss. The common thermal insulation
materials are PEF, glass cotton, rubber insulation sponge, etc.
(8) Thermometer and water pressure gauge should be installed at the water inlet pipe and water
outlet pipe of unit for inspection during operation. You are suggest to adopt 0～100℃glass thermometer
and 0～1.6MPa water pressure gauge. Install the strainer at the water inlet position of unit to prevent
blockage of tubing heat exchanger and clean it periodically.
(9) In general, the service valve should be installed in front of the electric solenoid valve on the
system pipeline for future maintenance. For the convenient of cleaning system, blow down valve should
be installed at the lowest position of the system.
(10) The water makeup valve and cut-off valve for the system may need to be thermal insulated in
winter to prevent breakage due to low temperature.
(11) After the pipes for the water system is installed well, conduct water leakage and blowdown test
according to related regulations to prevent damage to pipeline, tubing heat exchanger and water pump.
(12) If the ambient temperature is very low in winter, no need to cut off the power after stopping
operation. Otherwise, the freeze prevention protection may be invalid. If the unit won’t be used for a long
time, please drain out the residual water inside the unit, the water tank and the pipeline through the
drainage valve.

Circulating Air Source Heat Pump Water Heater
9
3.6 Install the water flow switch
The water flow switch is used for measuring water flow of the circulating water side. When the
circulating flow reaches its closed flow, it is used to output closed loop circuit; and when water flow is
smaller than a certain flow, water flow switch will send out a break-off signal to stop the units and thus
protect compressor, water pump and other important components.
（1）Usually water flow switch contains detachable paddles that are 45mm, 65mm, 75mm or
85mm’s long and 16mm’s wide. The paddle can be trimmed conditionally during installation.Please
make sure the rear part forms an arc that matches the pipe and the bottom of the paddle should be
10%-20% above the pipe central line, thus avoiding collision between the paddle and the inner surface
of pipes as well as other objects inside.
water flow switch other valve
fluid direction
Installation diagram for the water flow switch
（2）Please make sure that the flow direction is consistent with marks on the water flow switch box
cover;
（3）Water flow switch should be installed on horizontal pipes, and make sure that size of A in above
diagram is at least 5 times larger than pipe caliber;

Circulating Air Source Heat Pump Water Heater
10
（4）The wiring distance between the water flow switch and the units should be less than 10m, and
the water flow switch should be installed at a position where wiring is easy;
（5）Water flow switch project should be added by rain-proof equipment (Rainproof cover should be
set up);
（6）Water flow switch installation size is “G1”.
3.7 Construction and installation for the heating water tank
Installation diagram of water tank:
The installation of water tank is mainly for the matching between water tank and pipeline and the
matching among water level switch. Please pay attention to below point during installation:
（1）The water-getting outlet of user should be 50mm (minimum) higher than the circulating water
outlet to prevent water-lacking during operation.
（2）The overflow port should be 50mm (maximum) higher than the water level switch to prevent
overflow of water tank. The overflow port must be connected with connection pipe and then lead it to the
flow drainage outlet;
（3）The hot water inlet and the user back water outlet should point at the water level switch to
prevent impacting of water flow and then cause wrong action of switch.
（4）If the auxiliary electric heating is installed on the water tank, the position of the auxiliary electric
heating should be lower than the user water-getting position.
（5）Water temperature sensor must be installed under the user water-getting outlet, and it should
be placed into the blind pipe.
（6）The valid volume of water tank must be ensured. The valid volume of water tank is the volume
between the user water-getting outlet and the high water level.

Circulating Air Source Heat Pump Water Heater
11
3.8 System installation diagram and instruction
3.8.1 Hot water project
（1）Installation diagram for signal unit system
Fig1 Timer water supply installation diagram for single unit
（2）Installation diagram for modular system
Fig2 Timer water supply installation diagram for modular series
Fig3 Non-timer water supply installation diagram for modular unit (the height of heating water tank is
same as that of hot water storage tank)

Circulating Air Source Heat Pump Water Heater
12
Fig4 Non-timer water supply installation diagram for modular unit (the heating water tank is higher than
heat storage water tank)
1) Makeup water control: When the water level inside the water tank is lower than the low water
level, the water makeup solenoid valve will be started to make up water; when the water level reaches
the high water level, the water makeup solenoid valve will be turned off. For the first time water makeup
before operation, water can be made up into water tank directly. During operation, the water will make up
automatically from the water inlet of heating unit.
2) Instruction for heating operation: When the hot water temperature inside the water tank is lower
than a certain temperature below the set temperature, the unit will be started up. The hot water
circulating pump will let the water inside the hot water tank; when the water temperature inside the water
tank reaches set temperature, the unit will stop operation.
As for the project with thermal storage water tank, if the water level switch of thermal storage water
tank is lower than the low water level, the water discharge solenoid valve (water discharge pump)
between heating water tank and thermal storage water tank will be started up, and then fill the thermal
storage water tank with water. If the water level switch of the thermal storage water tank is at the high
water level, the water discharge solenoid valve between heating water tank and thermal storage water
tank (water discharge water pump) won’t act and it won’t fill the thermal storage water tank with filter.
3) Parallel connection quantity of unit 1≤n≤16.
4) The heating water tank and the thermal storage water tank must be insulated.
5) As for the heat supply system of modular system with timer function, if the water consumption
volume is not big and not frequently, it’s no need to set thermal storage water tank in the project (fig 2);
as for the non-timer heat supply system, if the water consumption volume is big and frequently, it’s
required to set heating water tank and thermal storage water tank. In general, one heating water tank is
ok; while there should be one or more thermal storage water tank according to the actual circumstances
for satisfying water consumption requirement at any time. At present, there are two kinds of setting
method for heating water tank and thermal storage water tank: one setting method is contour setting,

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that’s the heating water tank and the thermal storage water tank are set at the architectural plane. Water
discharge water pump should be set between thermal storage water tank and heating water tank for
sending the heated water to the thermal insulating water tank (see fig 3). The other setting method is the
non-contour setting, that’s the heating water tank is higher than the thermal storage water tank. The
heated water can be send to the thermal insulating water tank by the gravity of water and it’s no need to
set water pump (fig 4). The second setting method is suggested for the project.
6) When users don’t use the hot water for a long time, the water temperature inside the thermal
storage water tank will decrease due to the heat loss. It needs to set thermal insulating unit on the
project. When the water temperature inside the thermal storage water tank is lower than a certain
temperature below the set temperature (user can set the temperature by themselves), and thermal
insulating unit will be started up and heat the water inside the thermal storage water tank. When the
water temperature reaches to set temperature, the thermal insulating unit will stop operation. The
detailed quality is decided by the actual circumstances.
7) Back water control of water system at user side: When the water at the user side hasn’t been
consumed for a long time, the water temperature inside the water pipe will decrease. When the water
temperature is decreased to set temperature （20～50℃adjustable）,backwater pump or backwater
solenoid valve will be started up to heat water or suck the hot water inside the thermal storage water tank
into pipe network to increase the water temperature. When the water temperature is increased to a
certain temperature above set temperature, backwater pump or backwater solenoid valve will be
stopped for ensuring the water temperature requirement.
If user has requirement for water supply pressure. Users are suggested to adopt water pump +
electric contact type pressure switch. When the water pressure is lower than set value, the water pump
will be started up; when the pressure reached to set value, the water pump will stop operation. When
user is using water, the user water supply water pump will be controlled by the by electric contact
manometer or water flow switch （equipped by project）. Meanwhile, they will send the power-off
command to backwater solenoid valve.
8) High/low water level requirement for water level switch
The high water level of water level switch for the heating water tank should be lower than the
overflow pipe (generally, on top of the water tank) of the heating water tank. The low water level should
be a little higher than the pipe inlet of unit at the circulating heating side.
9) Water system instruction at user side
If the system pipeline is short and the pipe network is simple, user can supply water by the gravity of
water, no need to adopt water pump circulation. You can also adopt the water pump circulation system
as shown in fig 3 and fig4. If the water hasn’t been used for a long time, the water temperature inside the
water pipe will decrease. When it’s decreased to a certain temperature below the set temperature, water
supply water pump will be started up to compress the hot water inside the thermal storage water tank
into pipe network for increasing the water temperature.
10) Control of auxiliary electric heating: The auxiliary electric heating adopts pipeline electric heating,
which is controlled by ambient temperature and the unit.
Special hint:
If the unit hasn’t been used for a long time or the unit is started up for the first time, please check the

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heating water tank. Fill the heating water tank with water and then turn on the unit.
For the heat supply system with timer function, if the water inside the water tank hasn’t been used
up within one day, users are suggested to turn on the electromagnetic water makeup valve to fill the
water tank with water before operating the unit for the second day.
3.8.2 Swimming pool project
（1）Installation diagram for the single unit system
（2）Installation diagram for the modular system
Instalaltion principle instruction :
1) In order to prevent water freezing in the water side heater exchanger and pipeline, add ethanol
and propyl alcohol in water. However, prohibit adding salt into water for preventing corrosion and
damage to the unit. The water side heat exchanger inside the unit can’t comply with the anti-corrosive
requirement for swimming pool. Therefore, please do adopt intermediate plate for the second
heat-exchanging method for swimming pool project.
2) In order to prevent frequent ON/OFF of the unit due to low load, and below 0℃water

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temperature during defrosting period, if the swimming pool system is frequently operates under low load,
please make sure the water capacity of the system is more than the 1/6 of the total rated flow volume per
each hour for every modules. If the waterway is short, it needs to add water storage tank. Otherwise, it
may affect the service life of the unit.
3) Instruction for water makeup: When the water level inside the expansion water tank, the water
makeup valve will open to make up water; when the water level reaches a certain water level, the water
makeup valve will be closed.
4) Instruction for heating operation: When the water temperature in the swimming pool inspected by
water tank temperature sensor is decreased to a certain temperature below set temperature, the unit will
be started up and the unit side circulating water pump will make the water inside the pipe network pass
through the water side heat exchanger and then heat it circulately. Meanwhile, swimming pool side
circulating water pump will make the water inside the swimming pool pass through removable plate-type
heat exchanger for the second time heat-exchanger. When the water temperature in the swimming pool
reaches the set temperature, the unit will stop operation. Because swimming pool system is the second
time heat-exchanging, there’s temperature difference of heat-exchanging at unit side and swimming pool
side. When setting the temperature value of temperature sensor for water tank, please try to set it 10℃
above lower than the maximum set temperature.
5) Parallel connection quantity of unit1≤n≤16.
6) Water pump control: because the water inside pipe network and swimming pool should be heat
exchanged simultaneously, please make sure the water pump at unit side and the water pump at
swimming pool side are controlled simultaneously during installation.
7) Control of auxiliary electric heating: The auxiliary electric heating adopts pipeline electric heating,
which is controlled by ambient temperature and the unit.
8) If the unit hasn’t been used for a long time or the unit is started up for the first time, please check
the pipe network and clean it. Fill the pipe network and expansion water tank with water and then turn on
the unit.