LG ARUN096BT2 Installation Manual page 29

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
Total pipe length = A+a+b+c+d+e+f 1,000m(3,281 ft)
Longest pipe length
L
A+f 150m(492ft)
Longest pipe length after 1st branch
l
f 40m(131ft)
Difference in height(Outdoor Unit
H
H 100m(328ft)
Difference in height (Indoor Unit
h
h 15m(49ft)
Difference in height (Outdoor Unit
h1
h1 5m(16ft)
• * : 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)
Slave2
Slave1
Master
10m
(32.8ft)
or less
Branch pipe can not be used after header
* Equivalent pipe length
A+f 175m(574ft)
Indoor Unit)
Indoor Unit)
Outdoor Unit)
Refrigerant piping installation
L 150m(492ft)
h 15m(49ft)
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.
Installation Manual 29
40m(131ft)