Cooper & Hunter CH-HP20CMFNM, Руководство пользователя

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Circulating Air Source Heat Pump Water Heater
8
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.