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Installation Procedure
Step 6 Cutting or flaring the pipes
1
Make sure that you prepared 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. There are some examples of
correctly and incorrectly cut edges below.
Oblique
90°
3
To prevent a gas leak, remove all burrs at the cut edge
of the pipe using a reamer.
4
Carry out flaring work using flaring tool as shown
below.
Clutch type
<Flaring tool>
A
Die
Copper pipe
8 English
Pipe cutter
Pipe
Rough
Burr
Wing nut type
York
Die
Flare nut
Copper pipe
Outer
Flare tool for R410A
diameter
clutch type
6.35
0~0.5
9.52
0~0.5
12.70
0~0.5
15.88
0~0.5
5
Check if you flared the pipe correctly. There are some
examples of incorrectly flared pipes below.
Inclined
Damaged
Surface
6
Align the pipes and tighten the flare nuts first
manually and then with a torque wrench, applying the
following torque.
L
Connection Torque
Outer diameter
(D, mm)
kgf•cm
6.35
140~180
9.52
350~430
2.70
500~620
15.88
690~830
CAUTION
• In case of needing brazing, you must work with
nitrogen gas blowing.
(Unit: mm)
A
Conventional flare tool
Clutch type
Wing nut type
1.0~1.5
1.5~2.0
1.0~1.5
1.5~2.0
1.0~1.5
1.5~2.0
1.0~1.5
1.5~2.0
Cracked
Uneven
Thickness
R 0.4~0.8
D
Flare dimension
(L, mm)
N•m
14~18
8.70~9.10
34~42
12.80~13.20
49~61
16.20~16.60
68~82
19.30~19.70
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