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Refrigerant piping system
Refrigerant piping system
Y branch method
ENGLISH
Installation Manual 23
• * : Assume equivalent pipe length of Y branch to be 0.5m (1.6ft), that of header to be 1m (3.3ft), calcu-
lation purpose
Example : 5 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
L70 (230)
H30 (98.4)
l 40 (131)
[Unit:m(ft)]
h15 (49)
Ú Total pipe length = A+B+C+D+a+b+c+d+e ≤ 145m (475.7ft)
Longest pipe length Equivalent pipe length
A+B+C+D+e ≤ 70m (230ft) * A+B+C+D+e ≤ 90m (295.2ft)
Longest pipe length after 1st branch
B+C+D+e ≤ 40m (131ft)
Difference in height(Outside Unit ÷ Indoor Unit)
H ≤ 30m (98.4ft)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 15m (49ft)
L
l
H
h
Indoor Unit should be installed at lower position than the header
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