Daikin VRV II RXYQ8MY1K Service Manual page 60

Si39-502A
Heating Oil Return & Defrost Operation
"High temperature, high pressure gas"
"High temperature, high pressure liquid"
"Low temperature, low pressure"
Refirgerant Circuit
" ON "
Fan OFF
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "ON"
Heat exchanger
Pressure regulating
valve
(check valve type)
Electronic
expansion
valve
Check
valve
Solenoid
valve
Check
valve
High pressure
switch
Stop valve(with service port on on-site piping side φ 7.9 flare connection)
Refrigerant Flow for Each Operation Mode
Indoor unit operation
" OFF "
Fan OFF
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Filter
Solenoid
pipe
Filter
valve
Check
valve
Solenoid
valve
Filter
Compressor
Gauge port
Low pressure
sensor
" ON "
Fan OFF
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "OFF"
Check
valve
Capillary tube
Fusible plug
Electronic expansion valve
Filter
Filter
4-way valve
High pressure
sensor
High
pressure
Check
switch
valve
Compressor
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