Daikin VRV-WIII RWEYQ72PTJU Service Manual page 28

Refrigerant Flow for Each Operation Mode
B. Heating Operation
High temp. High pressure gas
High temp. High pressure liquid
Low temp. Low pressure gas
Low temp. Low pressure liquid
20
Indoor Unit ON (Heating) + Thermo. ON
Heat exchanger
Fan ON
EXP
Filter Filter
(Subcooling control)
Condensing Unit
Check valve
SV
Electronic
expansion valve
Solenoid valve
Check valve
Pressure
regulating
valve
Filter
Filter
To other condensing unit
Indoor Unit OFF (Heating)
Heat exchanger
Fan OFF
EXP
Filter Filter
(200~300 pulse)
Solenoid valve
SV
Filter
Heat exchanger pipe
Filter
Capillary
Four-way valve
tube
Solenoid valve
SV
Check
valve
Check valve
Strainer
Filter
Capillary
tube
Solenoid
Low pressure
Gauge port
valve
sensor
1/4" flare connection
Indoor Unit ON (Heating) + Thermo. OFF
Heat exchanger
Fan OFF
EXP
Filter Filter
(200~300 pulse)
Fusible
Electronic
plug
expansion valve
Filter Filter
Water
inlet
SV
Plate heat
Solenoid valve
exchanger
Capillary
tube
Water
Service outlet
port
Capillary
tube
Four-way valve
Gauge port
S1NPH
High pressure
sensor
S1PH High pressure
switch
Compressor
INV.
Refrigerant Circuit
SiUS30-1301