Gree GC201808-III, Service Manual

Page: 14 / 362

GREE GMV5 HR HEAT RECOVERY UNITS
10
No. Name Main Function
10 Four-way valve
Used for the switching between the cooling and heating
functions of system IDU.
11 Heat exchanger Used for outdoor heat exchange.
12 Fan Strengthens heat exchanging.
13 Defrosting temperature sensor Used for defrosting detection.
14 Electronic expansion valve for heating Controls refrigerant adjustment in heating mode.
15 High height difference valve
It‘s the pressure-drop device when the height difference
between indoor unit and outdoor unit is big.
16 One-way valve Controls refrigerant flow direction.
17 Sub cooler electronic expansion valve
Controls the degree of sub cooling of tube refrigerant when the
system is running in cooling mode, and reduces the capacity
loss on pipes.
18 Sub cooler Controls the degree of sub cooling of tube.
19
Liquid outlet temperature sensor of sub
cooler
Detects tube temperature.
20
Inlet temperature sensor of gas-liquid
separator
Detects the inlet temperature of gas-liquid separator to prevent
the system from running when the refrigerant flows back to the
compressor.
21
Gas outlet temperature sensor of sub
cooler
Detects gas temperature of sub cooler.
22 Low-pressure sensor
Detects system low pressure to avoid extra-low operating
pressure.
23 Gas-liquid separator
Separate gas and liquid to prevent the system from running
when the refrigerant flows back to the compressor.
24
Outlet temperature sensor of gas-liquid
separator Detects internal status of gas-liquid separator to further control
the compressor suction performance.
25 Liquid intake valve Liquid intake control valve for refrigerant adjustment tank
26 Pressure valve Pressure control valve for refrigerant adjustment tank
27 Pressure balance valve Press control valve inside the refrigerant adjustment tank
28 Drain valve for cooling Drainage control valve for cooling of refrigerant adjustment tank
29 Drain valve for heating Drainage control valve for heating of refrigerant adjustment tank
30 Dry strainer
Avoid impurities getting into the electric parts. Meanwhile,
absorb the water inside the liquid status to prevent ice
blockage.
31 Filter Prevents impurities from entering components and parts.
32 Capillary tube Supports flow regulating and pressure reduction.
33 One-way valve
Avoid impurities getting into the electric parts. Meanwhile,
absorb the water inside the liquid status to prevent ice
blockage.
34 One-way valve
Prevent the refrigerant inside the liquid valve flow into the
refrigerant adjustment tank from heating drain valve.
35 Liquid valve
Stop valve, closed when the unit is delivered from the factory
and will be opened after installation.
36 Low pressure gas pipe valve
Stop valve, closed when the unit is delivered from the factory
and will be opened after installation.
37 High pressure gas pipe valve
Stop valve, closed when the unit is delivered from the factory
and will be opened after installation.
38 Low-pressure measurement valve
Detects the low pressure value or charges refrigerant during
system running.
39 Unloading valve Opening if the pressure inside the liquid pipe is too high
40 Oil return solenoid valve Oil return control for the compressor
41 Gas-bypass valve Make sure pressure of the system is balanced
42 Pressure-balanced valve Ensures success startup of compressor.