Refrigerant System Diagram; Schematic Diagram; Electrical Wiring - Tadiran Telecom SUV2-H18/1CFA-N Service Manual

4. Refrigerant System Diagram

Heat Exchanger
S
c
E
Four-Way Valve
D
Compressor
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.

5. Schematic Diagram

5.1 Electrical Wiring

Meaning of marks
Symbol OG
Color symbol ORANGE
Symbol COMP
Parts name COMPRESSOR
Capillary
Motor
Gas/Liquid Separator
WH YE
WHITE YELLOW RED
CT1,2
OVERLOAD
Electronic Expansion Valve
RD YEGN
YELLOW GREEN
4V
4-WAY VALVE
Refrigerant System Diagram Refrigerant System Diagram
Heat Exchanger
Filter
BN BU
BROWN BLUE BLACK
XT
TERMINAL BLOCK PROTECTIVE EARTH
1#
2#
3#
4#
BK VT
VIOLET
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