38
Refrigerant pipe installation
Selecting refrigerant pipe
First branch joint
Increase the main
pipe size
f Install the refrigerant pipe according to main pipe size of each outdoor unit capacity.
f When the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m (295.28ft),
you must increase the size of the pipe (main pipe) by one grade which connects between the outdoor unit to the first
branch joint.
C/O
33.6 kW
(114.6 MBH)
40.0 kW
(136.5 MBH)
(D)
(E)(C)
(A)
(B)
(3)(2)(1)
61.6 kW
(210.2 MBH)
Ex.) 135.2kW (461.3 MBH)
Capacity (kW) No.
Pipe size [mm (inch)]
Liquid pipe Gas pipe
33.6kW
(114.6 MBH)
(1) Ø 12.70 (1/2) Ø 28.58 (1 1/8)
73.6kW
(251.1 MBH)
(2) Ø 19.05 (3/4) Ø 34.92 (1 3/8)
135.2kW
(461.3 MBH)
(3) Ø 19.05 (3/4) Ø 41.28 (1 5/8)
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