Gree GMV-Y72WM/C-F Owner's Manual page 21

Photovoltaic Direct-driven Inverter VRF
R410A Refrigerant System
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
Equivalent length from the first branch to the
furthest piping (1)
Height difference
Outdoor unit at upper(2)
between outdoor unit
Outdoor unit at lower(2)
and indoor unit
Height difference between indoor units
Maximum length of Main pipe(3)
From IDU to its nearest branch (4)
(1) Normally, the pipe length from the first branch of IDU to the farthest IDU is
40m(131-1/4ft.). Under the following conditions, the length can reach 90m(295 -1/4ft.).
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.).
(3) 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-Y72WM/C-F(U)
GMV-Y96WM/C-F(U)
GMV-Y120WM/C-F(U)
GMV-Y144WM/C-F(U)
GMV-Y168WM/C-F(U)
GMV-Y192WM/C-F(U)
GMV-Y216WM/C-F(U)
GMV-Y240WM/C-F(U)
GMV-Y264WM/C-F(U)
GMV-Y288WM/C-F(U)
GMV-Y312WM/C-F(U)
GMV-Y336WM/C-F(U)
GMV-Y360WM/C-F(U)
Allowable Value
m(ft.)
≤40(131-1/4)
≤40(131-1/4)
≤90(295-1/4)
≤90(295-1/4)
≤30(98-2/4)
＜ 90(295-1/4)
≤40(131-1/4)
Gas pipe size mm(in.)
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
17
Fitting Pipe
L10-L11
L6+L7+L8+L9+j
——
——
——
L1
a,b,c,d,e,f,g,h,i,j
Liquid pipe size mm(in.)
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)