Bs Unit Functional Parts - Daikin VRV III REYQ8PY1 Service Manual

Refrigerant Circuit
1.6

BS Unit Functional Parts

BSVQ100,160,250PV1
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 set of all EV opening : 60pls
60
Symbol
Opens while in heating operation or all indoor units are in cooling
Y4E
operation. (Max : 760pls)
Y5E Opens while in cooling operation. (Max : 760pls)
Opens while in heating operation or all indoor units are in cooling
Y2E
operation. (Max : 480pls)
Y3E Opens while in cooling operation. (Max : 480pls)
In simultaneous cooling and heating operation, it is used to subcool
Y1E 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.
Liquid
Indoor
Gas
side
Function
Liquid
Dual Pressure
Outdoor
Suction
Refrigerant Circuit
Si37-701
side