PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
31
ENGLISH
Y branch method
Example : 5 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: 1st branch (Y branch)
Ⓒ
: Indoor Units
L150m
H 50m
l
40m
Refrigerant piping system
Total pipe length = A+B+C+D+a+b+c+d+e
≤
300m
L
Longest pipe length
Equivalent pipe length(*)
A+B+C+D+e
≤
150m
A+B+C+D+e
≤
175m
l
Longest pipe length after 1st branch
B+C+D+e
≤
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, calcu-
lation purpose
1,MFL67798018,영영 2018. 6. 15. 영영 2:28 Page 31