Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual page 14

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial
37 One-way valve
38 Liquid valve
39 Low pressure gas pipe valve
40 High pressure gas pipe valve
Low-pressure measurement
41
valve
42 Gas-bypass valve
43 Pressure-balanced valve
44 Varying capacity valve 1
45 Varying capacity valve 2
46 Oil-balanced valve 1
47 Oil-balanced valve 2
48 Oil return valve
49 One-way valve
50 Four-way valve 2
51 One-way valve
2.2 Piping Design of C&H Mode Exchanger
2.2.1 Piping diagram
NCHS1B(U):
Avoid impurities getting into the electric parts. Meanwhile, absorb the water inside
the liquid status to prevent ice blockage.
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
Stop valve, closed when the unit is delivered from the factory and will be opened
after installation.
Detects the low pressure value or charges refrigerant during system running.
Make sure pressure of the system is balanced.
Ensures success startup of compressor.
To make the compressor turn with double cylinders.
To make the compressor turn with triple cylinders.
Make sure oil of the system is balanced.
Make sure oil of the modules is balanced.
Oil return control for the compressor.
Prevents high-pressure gas from entering the compressor and fast balances the
suction pressure and discharge pressure in a compressor.
Used for the switching between the cooling and heating functions of system IDU.
Controls refrigerant flow direction.
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UNIT INTRODUCTION