Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 44 / 419

Refrigerant Circuit (Piping Diagrams) SiUS342004EB
37 Part 2 Refrigerant Circuit
1.2 Indoor Unit
 1. R1T is for remote controller thermistor or optional remote sensor.
No. in
piping
diagram
Name
Symbol
Function
Except
FXMQ-PB
FXTQ-TA
FXTQ-TB
CXTQ-TA
FXMQ-PB
FXTQ-TA
FXTQ-TB
CXTQ-TA
(1)
Electronic expansion valve
Y1E Y1E Y1E
Used for gas superheating degree control while in
cooling or subcooling degree control while in
heating.
(2) Suction air thermistor R1T R1T R1T (  1) Used for thermostat control.
(3)
Liquid pipe thermistor
R2T R2T R2T
Used for gas superheating degree control while in
cooling or subcooling degree control while in
heating.
(4)
Gas pipe thermistor
R3T R3T R3T
Used for gas superheating degree control while in
cooling.
(5) Discharge air thermistor — R4T — Used for discharge air temperature control.

FXFQ-AA

FXFQ-T, FXHQ-M

FXZQ-TA

FXZQ-TB
)LOWHU )LOWHU
*DVSLSLQJ
FRQQHFWLRQSRUW
+HDWH[FKDQJHU
0
/LTXLGSLSLQJ
FRQQHFWLRQSRUW
)DQ
(OHFWURQLF
H[SDQVLRQYDOYH
(4)
(3)
(1)
(2)
C: 4D140941
C: 4D024460P
(4)
(3)
Indoor heat exchanger
Fan
Filter Filter (1)
Gas piping
connection port
Liquid piping
connection port
(2)
(4)
(1)
(2)
(3)
C: 4D110602
(4)
(1)
(2)
(3)
C: 4D137354