Skyworth SUV2-H18/3CFA-N, Руководство по обслуживанию, Страница: 22 / 72

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Refrigerant System Diagram Refrigerant System Diagram
4. Refrigerant System Diagram
5. Schematic Diagram
5.1 Electrical Wiring
Symbol OG WH YE RD YEGN BN BU BK VT
Color symbol ORANGE WHITE YELLOW RED YELLOW GREEN BROWN BLUE BLACK VIOLET
Symbol COMP CT1,2 4V XT
Parts name COMPRESSOR OVERLOAD 4-WAY VALVE TERMINAL BLOCK PROTECTIVE EARTH
Meaning of marks
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 refrigerant cycle goes round and round to achieve the desired cooling purpose. During the heating
operation, the four-way valve is involved to make the refrigerant cycle 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.
D
c
S
E
Gas/Liquid Separator
Compressor
Four-Way Valve
Motor
Capillary
Electronic Expansion Valve
Heat Exchanger
2#
Heat Exchanger
Filter
1#
3#
4#