Bs Unit - Daikin RQYQ140-180PY1 Service Manual

Refrigerant Circuit
1.2

BS Unit

No. Name
1 Electronic expansion valve (EVSC)
2 Electronic expansion valve (EVHS)
3 Electronic expansion valve (EVLS)
4 Electronic expansion valve (EVH)
5 Electronic expansion valve (EVL)
6 Capillary tube
7 Double pipe heat exchanger
• BSVQ100 ~ 250PV1
21
Symbol
In simultaneous cooling and heating operation, it is used to subcooling
Y1E liquid refrigerants when an indoor unit downstream of this BS unit is in
heating operation.
Opens while in heating operation or all indoor units are in cooling
Y2E
operation.
Y3E Opens while in cooling operation.
Opens while in heating operation or all indoor units are in cooling
Y4E
operation.
Y5E Opens while in cooling operation.
Used to bypass high pressure gas to low pressure side to protect
—
"Refrigerant accumulation" in high and low pressure gas pipes.
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.
(1)
(7)
(6)
(2)
(4)
(3)
(5)
Function
Refrigerant Circuit
SiBE341001
4D057985B