Gree GMV-224WM/G-X Owner's Manual page 27

(2) The drop and the length of the pipe between the outdoor units are as follows.
Note：
When the distance A+B between the outdoor modules exceeds 2m, U-type oil trap should be
added at low-pressure gas pipe and is no more than 2m away from the outdoor manifold, and
A+B≤10m. The height drop among the outdoor units is 0m.
3.3.5 Pipe Selection
(1) When its modular units connection, the ODU must be installed in capacity order: ODU 4≥ODU
3≥ODU 2≥ODU 1.
(2) Pipe "A" between the outdoor unit and the manifold of outdoor unit.
The pipe size is based on the capacity of upstream module.
Basic module
GMV-224WM/G-X
GMV-280WM/G-X
GMV-335WM/G-X
GMV-400WM/G-X
GMV-450WM/G-X
GMV-504WM/G-X
GMV-560WM/G-X
Fig.3.3.7
Fig.3.3.8
Pipe between ODU and the first branch of IDU
Gas pipe(mm)
Φ19.05
Φ22.2
Φ25.4
Φ25.4
Φ28.6
Φ28.6
Φ28.6
23
GMV DC Inverter VRF
Unit: m
Liquid pipe(mm)
Φ9.52
Φ9.52
Φ12.7
Φ12.7
Φ12.7
Φ15.9
Φ15.9