48
Refrigerant pipe installation
Cutting or flaring the pipes
1. Make sure that you prepared the required tools.
f Pipe cutter, Deburring tool, flaring tool and pipe holder, etc.
2. If you want to shorten the pipe, cut it with a pipe cutter ensuring that the cut edge remains at 90° with the side of the
pipe.
f Refer to below illustrations for correct and incorrect examples of cut edges.
90°
Oblique Rough Burr
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a Deburring tool.
4. Carry out flaring work using flaring tool as shown below.
A
Flaring bar
Pipe
Yo ke
Flaring bar
Pipe
Flare nut
Clutch type Wing nut type
[Flaring tools]
Pipe diameter
[D, mm (inch)]
Depth of flaring part [A, mm (inch)]
Using flaring tool for
R-410A
Using conventional flaring tool
Clutch type Wing nut type
ø6.35(ø1/4)
0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø9.52(ø3/8) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø12.70(ø1/2) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø15.88(ø5/8)
0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
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