Gree GMV-72WM/B-U Owner's Manual page 18

GMV DC Inverter VRF
1) Actual length of pipe in total:
L1+L2x2+L3x2+L4x2+...+L9x2+a+b+...+i+j≤1000m(3280-3/4ft.).
2) Length between each IDU and its nearest branch a, b, c, d, e, f, g, h, i,
j≤40m(131-1/4ft.).
3) Difference between the pipe length from the first branch of IDU to the farthest IDU and
the pipe length from the first branch of IDU to the nearest IDU:
L10-L11≤40m(131-1/4ft.).
(2) When the maximum length of the main pipe from ODU to the first branch of IDU
is≥90m(295-1/4ft.), then adjust the pipe size of the gas pipe and liquid pipe of main pipe
according to the following table.
Outdoor Model
GMV-72WM/B-U(U)
GMV-96WM/B-U(U)
GMV-120WM/B-U(U)
GMV-144WM/B-U(U)
GMV-168WM/B-U(U)
GMV-192WM/B-U(U)
GMV-216WM/B-U(U)
GMV-240WM/B-U(U)
GMV-264WM/B-U(U)
GMV-288WM/B-U(U)
GMV-312WM/B-U(U)
GMV-336WM/B-U(U)
GMV-360WM/B-U(U)
If the length between an IDU and its nearest branch is above 10m(32-7/8ft.), then increase the
size of the liquid pipe of IDU (only for the pipe size that is≤6.35mm(1/4inch).
4.3.4 Connection Pipe among Outdoor Modules
Gas pipe size mm(inch)
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
Φ34.9(1-3/8)
Φ34.9(1-3/8)
Φ34.9(1-3/8)
Φ34.9(1-3/8)
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
No need to enlarge pipe size
Fig.4.3.5
14
Liquid pipe size mm(inch)
No need to enlarge pipe size
Φ12.7(1/2)
Φ15.9(5/8)
Φ15.9(5/8)
Φ19.05(3/4)
Φ19.05(3/4)
Φ19.05(3/4)
Φ19.05(3/4)
Φ22.2(7/8)
Φ22.2(7/8)
Φ22.2(7/8)
Φ22.2(7/8)
Φ22.2(7/8)
Unit: m(inch)
Unit: m(ft.)