GMV DC Inverter VRF
20
NOTES!
(1) Note 1: Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m.
When those three conditions as below are satisfied, the length can reached 120m.
1) Actual length of pipe in total: L1+L2x2+L3x2+L4x2+…+L9x2+a+b+…+i+j≤1000m;
2) Length between each IDU and its nearest branch a, b, c, d, e, f, g, h, i, j≤40m;
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.
(2) Note 2: When the ODU is at the up side and the height drop exceeds 50m, please contact
the engineer; when the ODU is at the lower side and the height drop exceeds 90m, please
contact the engineer.
When the ODU is at the up side and the height drop between the IDU and ODU is more
than 50m, the liquid pipe size from the ODU to the first manifold of IDU must be enlarged.
When the ODU is at the lower side and the height drop between the IDU and ODU is more
than 40m, the liquid pipe size from the ODU to the first manifold of IDU must be enlarged.
(3) When the height drop among IDUs is more than 15m, the liquid pipe size from the ODU to
the first manifold of IDU must be increased.
(4) When the maximum length of the main pipe from ODU to the first branch of IDU is≥90m, then
adjust the pipe size of the gas pipe and liquid pipe of main pipe according to the following
table.
No need to enlarge pipe size
No need to enlarge pipe size
GMV-280WM/G-X No need to enlarge pipe size Φ12.7
GMV-400WM/G-X Φ28.6 Φ15.9
GMV-450WM/G-X Φ31.8 Φ15.9
GMV-560WM/G-X Φ31.8 Φ19.05
GMV-680WM/G-X Φ31.8 Φ19.05
GMV-735WM/G-X Φ38.1 Φ22.2
GMV-839WM/G-X Φ38.1 Φ22.2
GMV-950WM/G-X Φ38.1 Φ22.2
GMV-1015WM/G-X Φ41.3 Φ22.2
GMV-1119WM/G-X Φ41.3 Φ22.2
GMV-1230WM/G-X Φ41.3 Φ22.2
GMV-1295WM/G-X Φ41.3 Φ22.2
GMV-1399WM/G-X Φ44.5 Φ22.2
GMV-1510WM/G-X Φ44.5 Φ22.2
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