Appendix SiEN34-705
140 General Information
Piping between refrigerant branch kits
! Choose from the following table in accordance with the total capacity index of all the indoor
units connected below this.
! Do not let the connection piping exceed the main refrigerant piping size.
(Unit:mm)
Piping between refrigerant branch kit and indoor unit
! Match to the size of the connection piping on the indoor unit.
(Unit:mm)
Indoor unit total capacity index
Piping size (O.D.)
Gas pipe Liquid pipe
< 150 φ15.9
φ9.5150 ≤ x< 200 φ19.1
200 ≤ x< 290 φ22.2
290 ≤ x< 420
φ28.6
φ12.7
420 ≤ x< 640 φ15.9
640 ≤ x< 920 φ34.9
φ19.1
920 ≤
φ41.3
Indoor unit capacity type
Piping size (O.D.)
Gas pipe Liquid pipe
20 · 25 · 32 · 40· 50 type φ12.7 φ6.4
63 · 80 · 100 · 125 type φ15.9
φ9.5200 type φ19.1
250 type φ22.2
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