System Diagrams; Refrigerant System Diagrams - Daikin GYEQ20AN Service Manual

SiAUY361411EA

5. System Diagrams

5.1

Refrigerant System Diagrams

5.1.1 Cooling Mode Operation
• High-temperature, high-pressure refrigerant gas compressed by the compressor is fed via the
• The indoor electronic expansion valve depressurizes the liquid refrigerant to facilitate
• It is the indoor heat exchanger that functions as the evaporator, which deprives the indoor air
• Finally, gasified refrigerant enters into the outdoor unit and returns via the solenoid valve to
GYEQ20AN
Oil separator
Compressor 1
Compressor 2
∗ The actuators and refrigerant flow may vary depending on the control.
Device Overview
solenoid valve to the outdoor heat exchanger, which in turn condenses the refrigerant gas
while radiating the condensation heat into the outdoor air; this is where the refrigerant
changes from gas to liquid.
refrigerant evaporation in the evaporator.
of evaporation heat by changing the refrigerant from liquid to gas. The indoor air is cooled
through this evaporation heat deprivation process.
the compressor, completing one cooling cycle.
Outdoor heat exchanger F Outdoor fan
Outdoor heat exchanger B
Oil
cooler
Accumulator
(Discharge gas)
(Intake gas)
(Liquid)
Receiver
Waste heat
recovery
device
System Diagrams
BS unit
Indoor unit
BS unit
Indoor unit
SV : Solenoid valves CV : Check valve
EV : Electronic expansion valve BV : Stop valve
TD : Discharge temperature HPS : Hi g h-si d e pressure swi t ch
TS : Intake temperature PH : High pressure sensor
TO : Oil temperature PL : Low pressure sensor
TREC : Receiver temperature
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