LG MULTI V S ARUV060GSD0 Installation Manual page 34

PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
34
Combination of Y branch/header method
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
Outdoor unit capacity (HP)
Total pipe length (m)
T
A+B+C+a+b+c+d+e
Longest pipe length (m) (Equivalent pipe length)
L
A+B+C+D+e
Longest pipe length after 1st branch (m)
B+C+D+e
Difference in height (m) (Outdoor Unit ÷ Indoor Unit)
H
H
Difference in height (m) (Indoor Unit ÷ Indoor Unit)
h
h
• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, cal-
culation purpose
• Indoor Unit should be installed at lower position than the header.
WARNING
!
• It is recommended that difference of piping length for pipes connected to the Indoor Unit
is minimized. Performance difference between Indoor Units may occur.
• When the any one (or both ) of below conditions are satisfied, the diameter of main pipe
(A) must be increased according to below table.
- The equivalent length between outdoor unit and the farthest indoor unit is 90m or more
(Liquid and Gas pipes are increased)
L 150m
Branch pipe can not be used after header
2.5 3
50 80
30 40
20 30
15 15
7.5 7.5 7.5
40m
4 5 6
85 100 100
50 50 50
30 30 30
15 15 15
7.5 7.5