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PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
Example : 5 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: 1st branch (Y branch)
Ⓒ
: Y branch
Ⓓ
: Indoor Unit
Ⓔ
: Header
Ⓕ
: Sealed piping
L 150m
40m
H 50m
Branch pipe can not be used after header
Combination of Y branch/header method
Total pipe length = A+B+C+a+b+c+d+e
≤
300m
L
Longest pipe length
Equivalent pipe length(*)
A+B+b
≤
150m
A+B+b
≤
175m
l
Longest pipe length after 1st branch
B+b
≤
40m
H
Difference in height (Outdoor Unit
÷
Indoor Unit)
H
≤
50m (40m : Outdoor Unit is lower than Indoor Units)
h
Difference in height (Indoor Unit
÷
Indoor Unit)
h
≤
15m
• * : 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)
!
1,MFL67798027,영영 2018. 6. 18. 영영 3:07 Page 34