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7. Refrigerant Piping System
Header Method
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Outdoor unit capacity (HP)
Total pipe length (m)
T
A+a+b+c+d+e+f
Longest pipe length (m) (Equivalent pipe length)
L
A+f
Longest pipe length after 1st branch (m)
f
Difference in height (m) (Outdoor Unit ÷ Indoor Unit)
H
H
Difference in height (m) (Indoor Unit ÷ Indoor Unit)
h
h
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.
14 _
R410A(50/60Hz)
L
2.5
3
4
50
80
85
30
40
50
20
30
30
15
15
15
7.5
7.5
7.5
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