Bs Unit Functional Parts - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C
1.4

BS Unit Functional Parts

BSV4Q100PV1, 6Q100PV1
No. Name
1 Electronic expansion valve (EVH)
2 Electronic expansion valve (EVL)
3 Electronic expansion valve (EVHS)
4 Electronic expansion valve (EVLS)
5 Electronic expansion valve (EVSC)
6 Capillary tube
Note : Factory setting of all EV opening : 60pls
Refrigerant Circuit
Symbol
Y4E
Y5E
Y2E
Y3E
Y1E
Liquid
Indoor
side
Gas
Opens while in heating operation or all indoor units are in cooling
operation. (Max : 760pls)
Opens while in cooling operation. (Max : 760pls)
Opens while in heating operation or all indoor units are in cooling
operation. (Max : 480pls)
Opens while in cooling operation. (Max : 480pls)
In simultaneous cooling and heating operation, it is used to subcooling
liquid refrigerants when an indoor unit downstream of this BS unit is in
heating operation. (Max : 480pls)
Used to bypass high pressure gas to low pressure side to protect
"Refrigerant accumulation" in high and low pressure gas pipes.
(5)
(6)
(3)
(1)
(4)
(2)
Refrigerant Circuit
Function
Liquid
Dual Pressure
Suction
Outdoor
side
60