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8-5. Pipe selection
Piping size
Liquid Pipe
Gas Pipe
Outdoor unit ~ The first refnet joint piping
Refnet joint ~ Refnet joint piping
-
Refnet joint ~ Indoor unit piping
ø3/8” X t0.8
-
-
ø3/4” X t1.2
ø7/8” X t1.2
ø1” X t1.2
ø1 1/8” X t1.2
ø1 1/8” X t1.2
ø1/2” X t0.8
ø1/2” X t0.8
ø1” X t1.2
6.0HP
5.0HP
Capacity of outdoor unit
7.0/7.5HP
8.0/10.0HP
Liquid
pipe
Gas
pipe
Capacity limit of
rear indoor unit
Capacity limit of
rear indoor unit
less than 55,000 Btu/h
more than 55,000 Btu/h
less than 31,000 Btu/h
31,000 ~ 55,000 Btu/h
55,000 ~ 72,000 Btu/h
more than 72,000 Btu/h
Liquid
pipe
Gas
pipe
Capacity limit of
rear indoor unit
Capacity limit of
rear indoor unit
less than 16,000 Btu/h
more than 16,000 Btu/h
less than 16,000 Btu/h
16,000 ~ 30,000 Btu/h
more than 30,000 Btu/h
ø3/8” X t0.8
ø5/8” X t1.0
ø3/4” X t1.2
ø1/4” X t0.7
ø3/8” X t0.8
ø1/2” X t0.9
ø5/8” X t1.0
ø3/4” X t1.2
. Installation
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8. Piping and refnet joint selection
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