Gree Ultra Heat GMV-VQ72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial INSTALLATION
43
Maximum length of Main pipe(3)
≤90(295-1/4)
L1
From IDU to its nearest branch (4)
≤40(131-1/4)
A11,A12,B11,B21,B22,B31,C11,D11, D21,D22
NOTICE!
(1) Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m (131-1/4feet).
Under the following conditions, the length can reach 90m (295-1/4feet).
1) Actual length of pipe in total: L1+L2x2+L3x2+L4x2+…+L9x2+a+b+…+i+j≤1000m (3280-3/4feet).
2) Length between each IDU and its nearest bran
ch a, b, c, d, e, f, g, h, i, j≤40m (131-1/4feet).
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: L12-
L11≤40m (131-1/4feet).
(2) When the outdoor unit is at upper side and height difference is more than 50m, please consult
company for the related technical requirement.
(3) When the maximum length of the main pipe from ODU to the first branch of IDU is
≥
50m (164
ft), then adjust the pipe size.
Total rated capacity of
ODU: C (Btu/h)
Pipe between outdoor unit and the first indoor branch
Low pressure gas pipe
mm(inch)
Liquid pipe mm(inch)
High pressure gas pipe
mm(inch)
GMV-VQ72W/A-F(U) No need to enlarge pipe size No need to enlarge pipe size
Φ22.2(7/8)
GMV-VQ96W/A-F(U) No need to enlarge pipe size No need to enlarge pipe size
Φ22.2(7/8)
GMV-VQ192WM/A-F(U)
Φ34.9(1-3/8) Φ19.05(3/4) Φ31.8(1-1/4)
(4) If the length between an IDU and its nearest branch is above 10m (32-3/4feet), then increase the
si
ze of the liquid pipe of IDU (only for the pipe size that is ≤6.35mm (1/4inch).
4 CONNECTION PIPE AMONG ODU MODULES