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PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
30
Selection of Refrigerant Piping
Gas pipe
Main pipe
No.
Piping parts
Outdoor unit
①
↓
1st branching section
Branching section
②
↓
Branching section
Branching section
③
↓
Indoor unit
Outdoor unit
Liquid pipe
Branching
pipe
Branching
pipe
Name
Main pipe
Branching pipe
Indoor unit
connecting pipe
Indoor unit
Selection of pipe size
Size of main pipe
Outdoor unit
Liquid pipe
capacity[HP]
[mm(inch)]
4
Ø 9.52(3/8)
5
Ø 9.52(3/8)
6
Ø 9.52(3/8)
8
Ø 9.52(3/8)
10
Ø 9.52(3/8)
12
Ø 12.7(1/2)
Pipe size of between branching sections
Indoor unit
Liquid pipe
capacity[kW(Btu/h)]
[mm(inch)]
≤ 5.6(19 100)
Ø 6.35(1/4)
< 16.0(54 600)
Ø 9.52(3/8)
< 22.4(76 400)
Ø 9.52(3/8)
< 36.4(124 200)
Ø 9.52(3/8)
Connecting pipe size of indoor unit
Indoor unit
Liquid pipe
capacity[kW(Btu/h)]
[mm(inch)]
≤ 5.6(19 100)
Ø 6.35(1/4)
< 16.0(54 600)
Ø 9.52(3/8)
≤ 22.4(76 400)
Ø 9.52(3/8)
≤ 28.0(95 900)
Ø 9.52(3/8)
Gas pipe
[mm(inch)]
Ø 15.88(5/8)
Ø 15.88(5/8)
Ø 19.05(3/4)
Ø 19.05(7/8)
Ø 22.2(7/8)
Ø 28.58(11/8)
Gas pipe
[mm(inch)]
Ø 12.7(1/2)
Ø 15.88(5/8)
Ø 19.05(3/4)
Ø 22.2(7/8)
Gas pipe
[mm(inch)]
Ø 12.7(1/2)
Ø 15.88(5/8)
Ø 19.05(3/4)
Ø 22.2(7/8)
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