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ENGLISH
Size of the pipe connected to the outdoor unit (A)
Select the size of the pipe according to the below table.
Outdoor unit capacity
[kW (MBH)]
Main pipe length within 90 m (295 ft)
Size Up (Main pipe length over 90 m (295 ft))
Liquid pipe
[mm (inch)]
Gas pipe
[mm (inch)]
Liquid pipe
[mm (inch)]
Gas pipe
[mm (inch)]
22.4 kW (76.4 MBH)
Ø 9.52 (3/8)
Ø 19.05 (3/4)
Ø 12.70 (1/2)
Ø 22.22 (7/8)
28.0 kW (95.5 MBH)
Ø 22.22 (7/8)
Ø 25.40 (1)
note1)
33.6 kW (114.6 MBH)
Ø 12.70 (1/2)
Ø 28.58 (1 1/8)
Ø 15.88 (5/8)
Ø 28.58 (1 1/8)
40.0 kW (136.5 MBH)
45.0 kW (153.5 MBH)
Ø 31.75 (1 1/4)
note2)
50.4 kW (172.0 MBH)
Ø 15.88 (5/8)
Ø 19.05 (3/4)
56.0 kW (191.1 MBH)
61.6 kW (210.2 MBH)
67.2 kW (229.3 MBH)
Ø 34.92 (1 3/8)
Ø 38.10 (1 1/2)
note3)
73.4 kW ~ 84.0 kW
(251.1 MBH ~ 286.6 MBH)
Ø 19.05 (3/4)
Ø 22.22 (7/8)
89.6 kW ~ 95.2 kW
(305.7 MBH ~ 324.8 MBH)
101.6 kW (346.7 MBH)
Ø 41.28 (1 5/8)
Ø 41.28 (1 5/8)
106.6 kW ~ 135.2 kW
(363.7 MBH ~ 461.3 MBH)
140.2 kW ~ 168.2 kW
(478.4 MBH ~ 573.9 MBH)
Ø 53.98 (2 1/8)
173.6 kW ~ 224.8 kW
(592.3 MBH ~ 767.0 MBH)
Ø 22.22 (7/8)
Ø 53.98 (2 1/8)
Ø 25.40 (1)
note1)
Note1) If Ø 25.40mm (Ø 1”) pipe is not available on site, use Ø 28.58mm (Ø 1 1/8”) pipe.
Note2) If Ø 31.75mm (Ø 1 1/4”) pipe is not available on site, use Ø 34.92mm (Ø 1 3/8”) pipe.
Note3) If Ø 38.10mm (Ø 1 1/2”) pipe is not available on site, use Ø 41.28 (Ø 1 5/8”) pipe.