Outdoor-Air Processing Unit - Daikin Aurora Series Service Manual

SiUS341802E
1.3

Outdoor-Air Processing Unit

FXMQ48/72/96MFVJU
(5)
Distributor
Filter
No. in
Electric
piping
symbol
diagram
(1) Y1E
(2) Y1S
(3)
(4) R1T
(5) R2T
(6) R3T
(7) R4T
∗
Notes:
∗
Refrigerant Circuit
Heat exchanger
Fan
(4)
(1)
Electronic
expansion valve
Name
Electronic expansion valve
Solenoid valve
— Capillary tube
Suction air thermistor
Liquid pipe thermistor
Gas pipe thermistor
Discharge air thermistor
1. SH control: Superheated control of heat exchanger outlet
2. SC control: Subcooling control of heat exchanger outlet
(7)
(6)
Filter
Capillary
(3)
tube
Solenoid
(2)
valve
Check
valve
Filter
Used to control the flow rate of refrigerant, and make the
SH control (∗1) while in cooling.
Used to bypass hot gas while in heating with thermostat
OFF. Closed while in cooling.
Used to reduce pressure from high to low in bypassing hot
gas.
Used to turn ON or OFF the thermostat.
Used to control the opening degree of electronic expansion
valve under the SC control (∗2).
Used to control the opening degree of electronic expansion
valve under the SH control.
Used to control the electronic expansion valve opening and
thermostat ON/OFF so as to keep the discharge air
temperature at the set temperature.
Refrigerant Circuit
Gas pipe
connection port
Liquid pipe
connection port
C: 4D018650D
Function
16