Refrigerant Piping
ENGLISH
Installation Manual 27
n Header Method
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
L150 (492)
H50 (164)
40 (131)
h15(49)
[Unit:m(ft)]
WARNING
Pipe length after header branching (a~f)
It is recommended that difference in length of the pipes connected to the Indoor Units is minimized.
Performance difference between Indoor Units may occur.
Longest pipe length * Equivalent pipe length
A+f ≤ 150m(492ft) A+f ≤ 175m(574ft)
Longest pipe length after 1st branch
f ≤ 40m(131ft)
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 50m(164ft)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 15m(49ft)
L
l
H
h
Ú Total pipe length = A+a+b+c+d+e+f ≤ 300m(984ft)
• * :
Assume equivalent pipe length of Y branch to be 0.5m(1.6ft), that of header to be 1m(3.3ft), calculation purpose
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