Gree GMV-Y72WM/C-F Owner's Manual page 20

4.2.3 Allowable pipe length and drop height among indoor and outdoor units
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is
shown in the figure below.
Remark: Equivalent length of one Y-type manifold is about 0.5m(1-3/4ft.).
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(1-3/4ft.).
.
R410A Refrigerant System
Total length (actual length) of fitting pipe
Length of farthest
fitting pipe m(ft.)
Actual length
Equivalent length
Photovoltaic Direct-driven Inverter VRF
Fig.4.2.4
Allowable Value
m(ft.)
≤1000(3280-3/4)
≤165(541-1/4)
≤190(623-1/4)
16
Unit: m(ft.)
Fitting Pipe
L1+L2+L3+L4+...+L9+a+b+...+i+j
L1+L6+L7+L8+L9+j