Gree GRS-CQ8.0Pd/NaEK Service Manual page 128

Test Operation & Troubleshooting & Maintenance
low-temperature, low-pressure refrigerant vapor to
high-temperature high-pressure vapor and then discharge it to
Compressor
the evaporator. The two-stage enthalpy-adding compressor is
adopted herein, which can improve the heating performance of
the unit largely.
hi-pressure liquid refrigerant to low-temperature, low-pressure
Electrostatic
Expansion Valve
vapor-liquid mixture and adjust the refrigerant flow rate entering
the evaporator.
Vapor Liquid
prevent liquid refrigerant entering the compressor, which if not
Separator
avoided will lead to wet compression or even liquid slugging.
4-way Valve
realize switchover between cooling and heating. It also can be
used for defrosting through the counterflow.
liquefy the high-temperature high-pressure vapor refrigerant or
Plate Heat
Exchanger
Water Pump
It is the heart of the cooling system, mainly used to turn the
It is one of four main components and used to turn the
It is installed at the side of the suction line, and used to
It is used the switch flow direction of refrigerant and then
It is the water-refrigerant plate type heat exchanger, used to
evaporate the low-temperature low pressure liquid refrigerant.
Heat of condensation is taken away by circulation water and
heat for evaporation is supplied also by circulation water.
It is the power equipment for water circulation.
123