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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, that of header to be 1m, calcu-
lation purpose
• Indoor Unit should be installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit ≤ 10m, equivalent length : max 13m
(for 22HP or more)
Combination of Y branch/header method
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
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
L 150m(200m : Conditional application)
40m(90m : Conditional application)
Branch pipe can not be used after header
Slave
Slave
Master
Master
10m or
less
h1
L 150m(200m : Conditional application)
40m(90m : Conditional application)
Branch pipe can not be used after header
37
Slave
Master
ODU Capacity
Master ≥ Slave
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