30
Outdoor Unit
Refrigerant piping installation
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
≤
100m(328ft)
Difference in height (Indoor Unit
↔
Indoor Unit)
h
≤
15m(49ft)
Difference in height (Outdoor Unit
↔
Outdoor Unit)
h1
≤
5m(16ft)
L
l
H
h
h1
➲
Total pipe length = A+a+b+c+d+e+f
≤
1,000m(3,281 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.
• * : Assume equivalent piping length of Y branch to be 0.5m(1.6ft), that of header to be 1m(3.3ft), calculation pur-
pose
• Indoor Unit should be installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit
≤
10m(32.8ft), equivalent length : max 13m(42.6ft)
(for 18HP or more)