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Cutting or extending the pipe
4. Put a flare nut slightly into the pipe and modify the flare.
Pipe
Flare
5. Check if you flared the pipe correctly (see examples of incorrectly flared pipes below).
Correct
6. Align the pipes to connect them easily. Tighten the flare nuts first with your hands, and then with a torque wrench,
applying the following torque:
Indoor outlet pipe
during welding/brazing process. The joint must be accessible and serviceable.
7. For further details on how to connect to the outdoor unit and evacuate the air, refer to page 49~51.
If the flare nut is over-tightened, the flare may break and cause refrigerant gas leakage.
90°± 2°
B
R 0.4~0.8
Damaged
Inclined
Surface
Flare nut
Connecting pipe
English-46
Outer Diameter (D)
Depth (A)
ø1/4inch
0.051inch
(6.35mm)
(1.3mm)
ø3/8inch
0.071inch
(9.52mm)
(1.8mm)
ø1/2inch
0.079inch
(12.70mm)
(2.0mm)
ø5/8inch
0.087inch
(15.88mm)
(2.2mm)
Cracked
Outer
Diameter
ø1/4 inch (ø6.35mm)
ø3/8 inch (ø9.52mm)
ø1/2 inch (ø12.70 mm)
ø5/8 inch (ø15.88mm)
Flaring Size (B)
0.3425 - 0.3583 inch
(8.7 - 9.1 mm)
0.5039 - 0.5197 inch
(12.8 - 13.2 mm)
0.6378 - 0.6535 inch
(16.2 - 16.6 mm)
0.7598 - 0.7756 inch
(19.3 - 19.7 mm)
Uneven
Thickness
Torque
f
10.1~13.0 (140~180)
14~18
34~42
25.3~31.1 (350~430)
49~61
36.2~44.8 (500~620)
68~82
49.9~60.0 (690~830)
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