Outdoor-Air Processing Unit - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

SiUS341802EC
1.3

Outdoor-Air Processing Unit

FXMQ48/72/96MFVJU*
(5)
Distributor
No. in piping
Electric symbol
diagram
(1) Y1E
(2) Y1S
(3) —
(4) R1T
(5) R2T
(6) R3T
(7) R4T
Note(s)
1. SH control: Superheating control of heat exchanger outlet
2. SC control: Subcooling control of heat exchanger outlet
Part 2 Refrigerant Circuit
Heat exchanger
Fan
(4)
(1)
Filter Filter
Electronic
expansion valve
Name
Electronic expansion valve
Solenoid valve
Capillary tube
Suction air thermistor
Liquid pipe thermistor
Gas pipe thermistor
Discharge air thermistor
(7)
(6)
Filter
(3)
Capillary
tube
(2) Solenoid
valve
Check
valve
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 (Piping Diagrams)
Gas pipe
connection port
Liquid pipe
connection port
C: 4D018650D
Function
44