LG MULTI V MINI ARUN Série Guide D'installation page 28

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(984ft)
Longest pipe length
L
A+f ≤ 150m(492ft)
Longest pipe length after 1st branch
l
f ≤ 40m(131ft)
Difference in height(Outdoor Unit ↔ Indoor Unit)
H
H ≤ 50m(164ft) (40m(131ft) : Outdoor Unit is lower)**
Difference in height (Indoor Unit ↔ Indoor Unit)
h
h ≤ 15m(49ft)
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(1.6ft), that of header to be 1m(3.3ft), calculation purpose
• ** : Indoor Unit should be installed at lower position than the header
28 Outdoor Unit
h15(49)
* Equivalent pipe length
A+f ≤ 175m(574ft)
L150 (492)
40 (131)
[Unit:m(ft)]