Gree Ultra Heat GMV-VQ72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial UNIT INTRODUCTION
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NCHS2B(U):
The piping diagram of NCHS4B(U) and NCHS8B(U) is similar to the piping diagram of NCHS2B(U),
which have 4 or 8 branches of liquid pipes and gas pipes connecting with IDUs.
2.2.2 Names and main functions of components
No. Name Main Function
1 Sub cooler
Controls the degree of sub cooling of tube.
(For example, 1a is the sub cooler of IDU1)
2 Filter Prevents impurities from entering components and parts.
3
Sub cooler electronic
expansion valve
Controls the degree of sub cooling of tube refrigerant.
4
Gas inlet temperature
sensor of sub cooler
Detects gas tube temperature before inflowing to sub cooler.
5
Gas outlet temperature
sensor of sub cooler
Detects outflow gas temperature of sub cooler.
6 Gas-bypass valve Make sure pressure of the system is balanced.
7 Capillary tube Supports flow regulating and pressure reduction.
8 High pressure gas valve
Controls the refrigerant flow when IDU is heating.
(For example, 8a is the high pressure gas valve of IDU1)
9 Gas-bypass valve
Make sure pressure of the system is balanced.
(For example, 9a is the gas-bypass valve of IDU1)
10 Low pressure gas valve Controls the refrigerant flow when IDU is cooling.
A High pressure gas pipe Connects with ODU high pressure gas pipe.
B Low pressure gas pipe Connects with ODU low pressure gas pipe.
C Liquid pipe Connects with ODU liquid pipe.
D Gas pipe(with IDU)
Connects with IDU gas pipe.
(For example, D1 means connecting with gas pipe of IDU1)
E Liquid pipe(with IDU)
Connects with IDU liquid pipe.
(For example, E1 means connecting with liquid pipe of IDU1)