AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
7
The compressor consumes partial electrical energy to compress the refrigerant into
high-temperature and high-pressure gas. After entering the condenser (the water tank coil of a water
heater in static heat up mode), the gaseous refrigerant transfers its heat to water as its saturation
temperature is higher than the water temperature and leaves the condenser after condensing into liquid.
The liquid refrigerant enters the throttling device (generally the electronic expansion valve) for speedup
and pressure reduction. As partial liquid vaporizes, the liquid refrigerant has two states (gas and liquid)
when leaving the throttling device. The low-pressure refrigerant enters the vaporizer (the finned tube
exchanger of a water heater in static heat up mode) and is vaporized into liquid after absorbing heat from
air as its saturation temperature is lower than the air temperature. The low-pressure gas is inhaled by the
compressor for the next cycle.
6 Optional Accessories
The Gree air source water heater unit supports the following accessories:
Item Model Remark
Intelligent preheat water return device
(transient heat up module)
HS-01
Self-regulation heating belt 76612816
Pressure stabilizing valve 07382812
Note:
(1) If any of the preceding accessories is required, contact with the local sales company.
(2) GRS-2.4/D270ANbA-K unit can not connect Intelligent preheat water return device.
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