Gree GMV-Pdhm224W/Na-M

27
Connection of Indoor and Outdoor Unit
The diameter of the piping (the main pipe) from the Outdoor Unit to the first branch joint
A. For a single-module system, the diameter of the piping from the Outdoor Unit to the first branch joint shall
be selected according to the diameter of refrigerant piping for outdoor unit. The diameter of connection pipes
for basic module outdoor unit is as below:
Piping Connections
Basic Model
Liquid
(mm)
Suction Gas
(mm)
Discharge Gas
(mm)
GMV-Pdhm224W/Na-M
Φ9.5 Φ22.2 Φ19.1
GMV-Pdhm280W/Na-M
Φ9.5 Φ22.2 Φ19.1
GMV-Pdhm335W/Na-M
Φ12.7 Φ28.6 Φ19.1
GMV-Pdhm400W/Na-M Φ12.7 Φ28.6 Φ22.2
GMV-Pdhm450W/Na-M Φ12.7 Φ28.6 Φ22.2
B. If it is multi-module system,
The diameter of the branch piping between modules and outdoor unit shall be selected based on the
diameter of the connection pipe of basic module outdoor unit. The diameter of the connection pipe of basic
module outdoor unit is as below:
Piping Connections
Basic Model
Lquid
pipe
(mm)
Low-pressure
gas pipe
(mm)
High-pressure
gas pipe
(mm)
GMV-Pdhm224W/Na-M
Φ9.5 Φ22.2 Φ19.1
GMV-Pdhm280W/Na-M
Φ9.5 Φ22.2 Φ19.1
GMV-Pdhm335W/Na-M
Φ12.7 Φ28.6 Φ19.1
GMV-Pdhm400W/Na-M Φ12.7 Φ28.6 Φ22.2
GMV-Pdhm450W/Na-M Φ12.7 Φ28.6 Φ22.2
The diameter of the connection pipe between the branch pipes of basic module outdoor unit is as follows:
Diameter of the refrigerant piping between the branch
pipes of outdoor unit
Lquid pipe
(mm)
High-pressur
e gas pipe
(mm)
Low-pressur
e gas pipe
(mm)
450≥Q Φ12.7 Φ28.6 Φ28.6
960≥Q＞
450
Φ19.1 Φ34.9 Φ34.9
1580≥Q＞
960
Φ22.2 Φ41.3 Φ41.3
Total rated
capacity Q
of upstream
outdoor unit
Q＞1580 Φ25.4 Φ41.3 Φ54.1