Selection of Refrigerant Piping
Outdoor unit
Gas pipe
Liquid pipe
Main pipe
No.
Piping parts
Outdoor unit
①
↓
1st branching section
Branching section
②
↓
Branching section
PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
Branching
pipe
Branching
pipe
Name
Main pipe
Branching 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) Ø 28.58(1 1/8)
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) Ø 15.88(5/8)
< 22.4(76 400)
Ø 9.52(3/8) Ø 19.05(3/4)
< 36.4(124 200)
Ø 9.52(3/8)
31
Gas pipe
[mm(inch)]
Ø 15.88(5/8)
Ø 15.88(5/8)
Ø 19.05(3/4)
Ø 19.05(3/4)
Ø 22.2(7/8)
Gas pipe
[mm(inch)]
Ø 12.7(1/2)
Ø 22.2(7/8)