34
Cutting or extending the pipe
Outer Diameter
Torque (kgf•cm)
ø6.35 mm
140~170
ø9.52 mm
250~280
ø12.70 mm
380~420
ø15.88 mm
440~480
ø19.05 mm
990~1210
ø22.23 mm
990~1210
Indoor outlet pipe
Connecting pipe
Flare nut
5. Check if you flared the pipe correctly (see examples of incorrectly flared pipes below).
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:
7. For further details on how to connect to the outdoor unit and purge the air, refer to page 37~39.
Correct
Uneven
Thickness
Cracked
Damaged
Surface
Inclined
• Excessive torque can be cause of gas leakage. In case brazing the pipe, the nitrogen gas must be blown into the
pipe (50 Pa). The joint must be accessible and serviceable.
• Tighten the flare nut with torque wrench according to specified method.
If the flare nut is over-tightened, the flare may break and cause refrigerant gas leakage.
1. Make sure that you have all the required tools (pipe cutter, reamer, flaring tool and pipe holder).
2. If you want to shorten the pipe, cut it using a pipe cutter, ensuring that the cut edge remains at 90° with the side of the
pipe (see below examples of correct and incorrect cut edges).
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
4. Put a flare nut slightly into the pipe and modify the flare.
Oblique
Rough
Burr
Pipe
cutter
Pipe
Outer Diameter (D)
Depth (A)
Flaring Size (B)
ø6.35 mm
1.3 mm
9.0 mm
ø9.52 mm
1.8 mm
13.0 mm
ø12.70 mm
2.0 mm
16.2 mm
ø15.88 mm
2.2 mm
19.3 mm
ø19.05 mm
2.2 mm
22.5 mm
ø22.23 mm
2.2 mm
25.7 mm
Pipe
Flare
• Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe.
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