Gree GMV-VQ280WM/C-X Owner's Manual page 26

Difference between the pipe length from the first
indoor branch to the farthest indoor unit and the pipe
length from the first indoor branch to the nearest
indoor unit
Length from the first indoor branch to the farthest
indoor unit (1)
Maximum height difference
between indoor and outdoor units:
H
Maximum height difference between indoor units:h1
Maximum length of Main pipe (2)
From IDU to its nearest branch (3)
Maximum height difference between mode exchange
box: h2
NOTES:
(1) Normally, the pipe length from the first indoor branch to the farthest indoor unit is 40m.
Under the following conditions, the length can reach 90m:
1) Actual length of pipe in total:
L1+L2×2+L3×2+L4×2+...+L9×2+a11+b11+...+d21+d22≤1000m;
2) Difference between the pipe length from the first indoor branch to the farthest indoor unit
and the pipe length from the first indoor branch to the nearest indoor unit: L12-L11≤40m.
(2) When the maximum length of the main pipe from outdoor unit to the first indoor branch≥90m,
then adjust the size of high pressure gas pipe, gas pipe and liquid pipe of main pipe
according to the following table
Outdoor Model
GMV-VQ224WM/C-X
GMVVQ-280WM/C-X
GMV-VQ335WM/C-X
GMV-VQ400WM/C-X
GMV-VQ450WM/C-X
GMV-VQ504WM/C-X
GMV-VQ560WM/C-X
GMV-VQ615WM/C-X
GMV-VQ680WM/C-X
GMV-VQ730WM/C-X
GMV-VQ785WM/C-X
GMV-VQ850WM/C-X
GMV-VQ900WM/C-X
GMV-VQ960WM/C-X
GMV-VQ1010WM/C-X
GMV-VQ1065WM/C-X
GMV-VQ1130WM/C-X
GMV-VQ1180WM/C-X
GMV-VQ1235WM/C-X
GMV-VQ1300WM/C-X
—
Outdoor unit at
upper side
Outdoor unit at
lower side
Low pressure gas pipe
size(mm)
No need to enlarge pipe size No need to enlarge pipe size No need to enlarge pipe size
No need to enlarge pipe size
Φ28.6
Φ28.6
Φ31.8
Φ31.8
Φ31.8
Φ31.8
Φ31.8
Φ38.1
Φ38.1
Φ38.1
Φ38.1
Φ38.1
Φ41.3
Φ41.3
Φ41.3
Φ41.3
Φ41.3
Φ41.3
GMV Heat Recovery DC Inverter VRF
Length(m)
≤40
≤40
≤90
≤90
≤30
<90
≤40 a11,a12,b11,b21,b22,b31,c11,d11,d21,d22
≤5
Liquid pipe size(mm)
Φ12.7
Φ15.9
Φ15.9
Φ15.9
Φ19.05
Φ19.05
Φ19.05
Φ19.05
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
Φ22.2
22
Remarks
L12-L11
L7+L8+L10+D22
—
—
h1
L1
h2
High pressure gas pipe
size(mm)
Φ22.2
Φ22.2
No need to enlarge pipe size
Φ25.4
Φ28.6
Φ28.6
Φ28.6
Φ28.6
Φ31.8
Φ31.8
Φ31.8
Φ31.8
Φ31.8
Φ34.9
Φ34.9
Φ34.9
Φ34.9
Φ34.9
Φ34.9