Gree GMV-784WM/H-X - Pipeline Design and Installation; Pipe Length and Height Difference Limits; Outdoor Module Connection Piping

GMV DC Inverter VRF
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3.3.3 Allowable pipe length and height difference 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.
Unit:m
Fig. 3.3.1
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.
——
Length(m)
Fitting Pipe
Total length (actual length) of fitting pipe
≤1000
L1+L2+L3+L4+
…
+L9+a+b+
…
+i+j
Length of farthest fitting pipe(m)
Actual length
≤200
L1+L6+L7+L8+L9+j
Equivalent length
≤240
Equivalent length from the first branch to the furthest
indoor unit
*1
≤120 L6+L7+L8+L9+j
Height difference between
outdoor unit and indoor unit H
*2
Outdoor unit at upper
≤100
——
Outdoor unit at lower
≤110
——
Height difference between indoor units
≤40
——