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Installation Manual 29
ENGLISH
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
Ú 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)
Branch pipe can not be used after header
3 Outdoor Units
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN30
Ⓕ : Connection branch pipe
between Outdoor units:
ARCNN20
L 150m(492ft)
40m(131ft)
Master
Slave2
Slave1
10m
(32.8ft)
or less
H 100m(328ft)
h 15m(49ft)
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