LG ARUN50LH2A Installation Manual page 25

■ 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
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
* : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
CAUTION
Indoor Unit should be installed at lower position than the header
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.
Equivalent pipe length(*)
A+f ≤ 175m
Refrigerant Piping
L 150m
40m
Installation Manual 25