LG Multi V Space ARUV Series Installation Manual page 26

Refrigerant piping installation
u Header Method
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ú Total pipe length = A+a+b+c+d+e+f ≤ 150m(175m)
Longest pipe length
L
A+f ≤ 100m
Longest pipe length after 1st branch
f ≤ 30m
Difference in height(Outdoor Unit ÷ Indoor Unit)
H
H ≤ 10m
Difference in height (Indoor Unit ÷ Indoor Unit)
h
h ≤ 5m
WARNING
Pipe length after header branching (a~f)
It is recommended that difference in length of the pipes connected to the Indoor Units is minimized.
Performance difference between Indoor Units may occur.
• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
26 Outdoor Unit
h 5m
Branch pipe can not be used after header
* Equivalent pipe length
A+f ≤ 125m
L 100m
30m