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Technical Information
Service Manual
Models:GWHD(36)NK3BO,GWHD(42)NK3AO
M
Liquid Receiver
Outdoor Unit
Indoor Unit
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heat Exchanger
Heating
Cooling
Compressor
Gas/Liquid Separator
Stop Valve
Four-way Valve
Capillary
Oil Separator
alve
The outdoor and indoor units start to work once the power is switched on. During the cooling operation, the low
temperature, low pressure refrigerant gas from the heat exchanger of each indoor unit gets together and then is
taken into the compressor to be compressed into high temperature, high pressure gas, which will soon go to
the heat exchanger of the outdoor unit to exchange heat with the outdoor air and then is turned into refrigerant
liquid. After passing through the throttling device, the temperature and pressure of the refrigerant liquid will further
decrease and then go the main valve. After that, it will be divided and go to the heat exchanger of each indoor
unit to exchange heat with the air which needs to be conditioned. Consequently, the refrigerant liquid become low
temperature, low pressure refrigerant gas again. Such a refrigeration cycle goes round and round to achieve the
desired cooling purpose. During the heating operation, the four-way valve is involved to make the refrigeration
cycle run reversely. The refrigerant radiates heat in the heat exchanger of the indoor unit (so do the electric
heating devices) and absorb heat in the heat exchanger of the outdoor unit for a heat pump heating cycle so as to
achieve the desired heating purpose.
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