SiUS30-604
C: Heating and simultaneous cooling/heating operation mode (When the outdoor water cooled heat exchangers are used as condenser and evaporator mixed.)
To other indoor units
Bs unit
Indoor unit
Fan ON
Heat exchanger
Capillary
tube
Fan
Three way
valve
Electronic
expansion valve
Capillary tube
Check valve
Solenoid valve
Filter
Filter
Indoor unit (Thermostat "ON")
Bs unit
Indoor unit
Fan ON
Heat exchanger
Capillary
tube
Fan
Three way
valve
Electronic
expansion valve
Capillary tube
Check valve
Solenoid valve
Filter
Filter
Indoor unit (Thermostat "OFF")
Bs unit
Indoor unit
Fan ON
Heat exchanger
Capillary
tube
Fan
Three way
valve
Electronic
expansion valve
Capillary tube
Check valve
Solenoid valve
Filter
Filter
Indoor unit (Thermostat "ON")
Refrigerant Circuit
Outside unit 1
Cooling
"ON"
E3 control
Filter
Cooling
"ON"
Indoor unit
operation
Filter
ON-OFF control by
receiver pressurerising
control
Heating
"ON"
Filter
Outside unit 2
Solenoid valve
(SVSL) "OFF"
Compressor
stop
Refrigerant Flow for Each Operation Mode
High temperature, high pressure gas
High temperature, high pressure liquid
Outside unit 3
Low temperature, low pressure liquid or gas
Solenoid valve
(SVSL) "OFF"
Compressor
stop
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