Gree GMV-V72W/A-F Owner's Manual page 22

4.3.5.2 Connection sketch map of multi-module system
4.3.5.3 Select appropriate pipe between outdoor unit and the first indoor branch ("L") as per the pipe size
of outdoor unit. Pipe size of basic outdoor module is shown as follows:
For single module, L pipe between outdoor unit and the first indoor branch:
Basic module
GMV-V72W/A-F(U)
GMV-V96W/A-F(U)
For multi-module, L pipe between the terminal outdoor branch and the first indoor branch:
Basic module
Fig.20 (b)
Fig.21
Pipe between outdoor unit and the first indoor branch
Gas pipe mm(inch)
Φ28.6(1-1/8)
Φ28.6(1-1/8)
Pipe between outdoor unit and the first indoor branch
Gas pipe mm(inch)
18
Ultra Heat GMV Multi VRF
Liquid pipe mm(inch)
Φ12.7(1/2)
Φ12.7(1/2)
Liquid pipe mm(inch)