Working Principles Of The Unit - York ERJC 36 Installation Instructions Manual

by johnson controls

Ⅲ Working Principles of the Unit

Schematic Diagram of Free Match Series Inverter Heat Pump Multi VRF System
Fig. 10 Schematic Diagram of Free Match Series Inverter Heat Pump Multi VRF System
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 refrigeration 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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Working Principles of the Unit
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