PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
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ENGLISH
• * : Assume equivalent pipe length of Y branch to be 0.5 m, that of header to be 1 m,
calculation purpose.
Y branch method
Example : 5 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: 1st branch (Y branch)
Ⓒ
: Indoor Units
L 80 m
H 30 m
l
40 m
Total pipe length = A+B+C+D+a+b+c+d+e
≤
300 m
L
Longest pipe length
Equivalent pipe length(*)
A+B+C+D+e
≤
80 m
A+B+C+D+e
≤
100 m
l
Longest pipe length after 1st branch
B+C+D+e
≤
40 m
H
Difference in height (Outdoor Unit
÷
Indoor Unit)
H
≤
30 m (20 m : Outdoor Unit is lower than Indoor Units)
h
Difference in height (Indoor Unit
÷
Indoor Unit)
h
≤
15 m