GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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5.3 Allowable pipe length and drop height among indoor and outdoor
units
Y type branch joint is adopted to connected indoor and outdoor units. Connecting method is
shown in the figure below.
Remark: Equivalent length of one Y-type manifold is about 0.5m(1-3/4feet).
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).
Total length (actual length) of fitting pipe
L1+L2+L3+L4+…+L9+a+b+…+i+j
Length of farthest
fitting pipe m(feet)
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