Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual page 15

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial
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
1 Sub cooler
2 Filter
Sub cooler electronic
3
expansion valve
Gas inlet temperature
4
sensor of sub cooler
Gas outlet temperature
5
sensor of sub cooler
6 Gas-bypass valve
7 Capillary tube
8 High pressure gas valve
9 Gas-bypass valve
10 Low pressure gas valve
A High pressure gas pipe
B Low pressure gas pipe
C Liquid pipe
D Gas pipe(with IDU)
E Liquid pipe(with IDU)
Controls the degree of sub cooling of tube.
(For example, 1a is the sub cooler of IDU1)
Prevents impurities from entering components and parts.
Controls the degree of sub cooling of tube refrigerant.
Detects gas tube temperature before inflowing to sub cooler.
Detects outflow gas temperature of sub cooler.
Make sure pressure of the system is balanced.
Supports flow regulating and pressure reduction.
Controls the refrigerant flow when IDU is heating.
(For example, 8a is the high pressure gas valve of IDU1)
Make sure pressure of the system is balanced.
(For example, 9a is the gas-bypass valve of IDU1)
Controls the refrigerant flow when IDU is cooling.
Connects with ODU high pressure gas pipe.
Connects with ODU low pressure gas pipe.
Connects with ODU liquid pipe.
Connects with IDU gas pipe.
(For example, D1 means connecting with gas pipe of IDU1)
Connects with IDU liquid pipe.
(For example, E1 means connecting with liquid pipe of IDU1)
11
Main Function
UNIT INTRODUCTION