Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 41 / 240

Ultra Heat GMV VRF Technical Service Manual INSTALLATION
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L10: Length from the first branch to the farthest IDU; L11: Length from the first branch to the nearest
IDU; Equivalent length of branch of IDU is 0.5m (1-3/4feet).
R410A Refrigerant System
Allowable Value
m(feet)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000(3280-3/4) L1+L2+L3+L4+…+L9+a+b+…+i+j
Length of farthest
fitting pipe m(feet)
Actual length
≤165(541-1/4)
L1+L6+L7+L8+L9+j
Equivalent length
≤190(623-1/4)
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
≤40(131-1/4)
L10-L11
Equivalent length from the first branch to the
furthest piping (1)
≤40(131-1/4)
L6+L7+L8+L9+j
Height difference
between outdoor
unit and indoor unit
Outdoor unit at upper(2)
≤50(164) ——
Outdoor unit at lower(2)
≤40(131-1/4) ——
Height difference between indoor units
≤15(49) ——
Maximum length of Main pipe(3)
≤90(295-1/4)
L1
From IDU to its nearest branch (4)
≤10(32-3/4)
a, b, c, d, e, f, g, h, i, j
Notices:
(1) Normally, the pipe length from the first branch of IDU to the farthest IDU is 40m (131-1/4feet).