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Refrigerant piping system
ENGLISH
Installation Manual 33
Outside unit
Gas pipe
Main pipe
Liquid pipe
Branching
pipe
Branching
pipe
Indoor unit
7.5 Selection of refrigerant piping
Selection of pipe sizeName
Size of main pipe
Pipe size of between branching sections
Connecting pipe size of indoor unit
Piping partsNo.
Outside unit
↓
1st branching section
Branching section
↓
Branching section
Branching section
↓
Indoor unit
Main pipe
①
②
③
Branching pipe
Indoor unit
connecting pipe
Outside unit capacity
Liquid pipe Gas pipe
[mm (inch)] [mm (inch)]
4HP Ø9.52 (3/8) Ø19.05 (3/4)
5HP Ø9.52 (3/8) Ø19.05 (3/4)
6HP Ø9.52 (3/8) Ø19.05 (3/4)
Indoor unit capacity[kW (Btu/h)]
Liquid pipe Gas pipe
[mm (inch)] [mm (inch)]
≤ 5.6 (19,100) Ø6.35 (1/4) Ø12.7 (1/2)
< 16.0 (54,600) Ø9.52 (3/8) Ø15.88 (5/8)
Indoor unit capacity[kW (Btu/h)]
Liquid pipe Gas pipe
[mm (inch)] [mm (inch)]
≤ 5.6 (19,100) Ø6.35 (1/4) Ø12.7 (1/2)
< 16.0 (54,600) Ø9.52 (3/8) Ø15.88 (5/8)
< 22.4 (76,400) Ø9.52 (3/8) Ø19.05 (3/4)
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