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).
Oblique
Rough
Burr
Pipe
cutter
Pipe
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
• Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe.
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 evacuate the air, refer to page 44~46.
Correct
Uneven
Thickness
Cracked
Damaged
Surface
Inclined
• Excessive torque can be cause of gas leakage. If extending pipe by welding/brazing please ensure nitrogen is used
during welding/brazing process. 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.
4. Put a flare nut slightly into the pipe and modify the flare.
Outer Diameter (D)
Depth (A)
Flaring Size (B)
ø6.35 mm
1.3 mm
8.7 - 9.1 mm
ø9.52 mm
1.8 mm
12.8 - 13.2 mm
ø12.70 mm
2.0 mm
16.2 - 16.6 mm
ø15.88 mm
2.2 mm
19.3 - 19.7 mm
Pipe
Flare
90°± 2°
°
2
±
°
5
4
R 0.4~0.8
B
Outer Diameter
Torque
N•m
kgf•cm
ø6.35 mm
14~18
140~180
ø9.52 mm
34~42
350~430
ø12.70 mm
49~61
500~620
ø15.88 mm
68~82
690~830
English-41
INST
ALL
ATION
05
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