Daikin VRV III REYQ8PY1 Service Manual page 102

Si37-701
Operation of refrigerant regulator
1. Recovery of refrigerant
2. Discharge of refrigerant
3. Pressure regulating valve (Refrigerant regulator)
Refrigerant Circuit
Surplus refrigerant is recovered to refrigerant regulator by opening of SVL and SVG when
the indoor unit load is small.
Liquid
Pipe
S1NPH
Equalizing
Pipe
SVP
Suction Pipe
Discharge refrigerant from refrigerant regulator by opening of SVC when the load of the
outdoor unit is large.
Liquid
Pipe
S1NPH
Equalizing
Pipe
SVP
Suction Pipe
The circuit will be closed when SVL, SVO, SVG are all closed. In this case, the increased
pressure in the refrigerant regulator will be transferred to the liquid refrigerant pipe side, to
regulate the pressure.
Refrigerant Flow for Each Operation Mode
Tsc
TL
Tsh
Tg
20SA
Ta
S1PH
Tdi
INV
S2NPL
TS_A
Tsc
TL
Tsh
Tg
20SA
Ta
S1PH
Tdi
INV
TS_A S2NPL
EVT
SVE
Tb
Pressure
regulating valve
Tf
EVM
SVL
Refrigerant
Regulator
SVO
EVT
SVE
Tb
Pressure
regulating valve
Tf
EVM
SVL
Refrigerant
Regulator
SVO
Right
SVG
Right
SVG
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