SiAUY361411EA
System Diagrams
Device Overview
16
5.1.2 Cooling Main / Heating Main A Mode Operation
• High-temperature, high-pressure refrigerant gas compressed by the compressor is fed to
outdoor heat exchanger F and the indoor heat exchanger on the heating side, which in turn
condense the refrigerant gas while radiating the condensation heat into the air. The indoor
unit on the heating side warms the indoor air through this heat radiation. This is where the
refrigerant changes from gas to liquid.
• The indoor electronic expansion valve on the cooling side depressurizes the liquid refrigerant
to facilitate refrigerant evaporation in the evaporator.
• It is the indoor heat exchanger on the cooling side that functions as the evaporator, which
deprives the indoor air of evaporation heat by changing the refrigerant from liquid to gas. The
indoor air is cooled through this evaporation heat deprivation process.
• The refrigerant that has passed through the indoor heat exchanger on the cooling side is fed
to the outdoor unit, which in turn completely evaporates the refrigerant by mixing it with high-
temperature, high-pressure refrigerant in the waste heat recovery device and then returns it to
the compressor. This completes one cooling/heating cycle.
GYEQ20AN
∗
The actuators and refrigerant flow may vary depending on the control.
Waste heat
recovery
device
Accumulator
Receiver
Oil
cooler
Outdoor heat exchanger F
Outdoor heat exchanger B
Outdoor fan
Heating indoor unit
Cooling indoor unit
Oil separator
Compressor 1
Compressor 2
BS unit
BS unit
(Intake gas)
(Discharge gas)
(Liquid)
PL
: Solenoid valves
: Electronic expansion valve
: Discharge temperature
: Intake temperature
: Oil temperature
: Check valve
: Stop valve
: High-side pressure switch
: High pressure sensor
: Low pressure sensor
SV
EV
TD
TS
TO
: Receiver temperature
TREC
CV
BV
HPS
PH
Содержание GYEQ20AN
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