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46
English
Refrigerant piping work
INSTALLATION PARTS
Direction of the pipe when brazing
• Brazing the pipe should be done with the pipe headed downward or horizontally.
• Avoid brazing with the pipe headed upward.
Cutting or flaring the pipes
1 Make sure that you prepared the required tools.
ࣕ Pipe cutter, reamer, 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.
ࣕ There are some examples of correct and incorrect cut edges below.
90°
Oblique
Rough
Burr
3 To prevent a gas leak, remove all burrs at the cut edge of the pipe with a reamer.
4 Carry out flaring work with a flaring tool as shown below.
Flaring tool
Clutch type
Wing nut type
A
Flaring
bar
Copper pipe
Yoke
Flaring bar
Copper pipe
Flare nut
Outer diameter [D (mm)]
Depth of the flare [A (mm)]
Flare tool
Clutch type Wing nut type
ø 6.35 1.0~1.5
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ø 9.52 1.0~1.5
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ø 12.70 1.0~1.5
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ø 15.88 1.0~1.5
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