LG Multi V miniARUN Series Installation Manual page 24

Refrigerant Piping
I Header Method
Example : 6 Indoor Units connected
: Outdoor Unit
: 1st branch
: Indoor Units
: Sealed piping
➲ Total pipe length = A+a+b+c+d+e+f ≤ 300m
Longest pipe length
L
A+f ≤ 150m
Longest pipe length after 1st branch
l
f ≤ 40m
Difference in height(Outdoor Unit ↔ Indoor Unit)
H
H ≤ 50m (40m : Outdoor Unit is lower)**
Difference in height (Indoor Unit ↔ Indoor Unit)
h
h ≤ 15m
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
• ** : Indoor Unit should be installed at lower position than the header
24 Outdoor Unit
* Equivalent pipe length
A+f ≤ 175m
L 150m
40m