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38
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
ENGLISH
• * : Assume equivalent piping length of Y branch to be 0.5m(1.64ft), that of header to be
1m(3.28ft), calculation purpose.
• Indoor Unit should be installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit ≤ 10mm(32.8ft), equivalent length : max
13m(511.8ft)(for 16Ton(20HP) or more)
1 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
2 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe between Outdoor
units: ARCNN21
Ⓕ : Header
Ⓖ : Sealed piping
H 110m(361ft)
40m(131ft)
L 150m(492ft)(200m(656ft) : Conditional application)
40m(131ft)(90m(295ft) : Conditional application)
Branch pipe can not be used after header
Branch pipe can not be used after header
H 110m(361ft)
Master
Slave
Master
Slave
Master
Slave
ODU Capacity
Master ≥ Slave
40m(131ft)
h1
10m
(33ft)
or less
L 150m(492ft)(200m(656ft) : Conditional application)
40m(131ft)(90m(295ft) : Conditional application)
Combination of Y branch/header method
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.
!
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