Gree GMV-72WM/B-U Owner's Manual page 17

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(1-3/4inch).
.
R410A Refrigerant System
Total length (actual length) of fitting pipe
Length of farthest
fitting pipe m(ft.)
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
Equivalent length from the first branch to the furthest
piping (1)
Height difference
between outdoor unit
and indoor unit
Height difference between indoor units
Maximum length of Main pipe (2)
From IDU to its nearest branch (3)
(1) Normally, the pipe length from the first branch of IDU to the farthest IDU is
40m(131-1/4ft.). Under the following conditions, the length can reach 90m(295-1/4ft.).
Actual length
Equivalent length
Outdoor unit at upper
Outdoor unit at lower
Fig.4.3.4
Allowable Value
m(ft.)
≤1000(3280-3/4)
≤165(541-1/4)
≤190(623-1/4)
≤40(131-1/4)
≤40(131-1/4)
≤90(295-1/4)
≤90(295-1/4)
≤30(98-1/2)
<90(295-1/4)
≤40(131-1/4)
13
GMV DC Inverter VRF
Unit: m(ft.)
Fitting Pipe
L1+L2+L3+L4+...+L9+a+b+...+i+j
L1+L6+L7+L8+L9+j
L10-L11
L6+L7+L8+L9+j
——
——
——
L1
a,b,c,d,e,f,g,h,i,j