8
Installation Procedure
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.
Pipe cutter
Pipe
90°
Oblique Rough Burr
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
A
Die
Copper pipe Flare nut Copper pipe
York
Die
Wing nut type
<Flaring tool>
(Unit: mm)
Outer
diameter
A
Flare tool for
R410A clutch type
Conventional flare tool
Clutch type Wing nut type
6.35 0~0.5 1.0~1.5 1.5~2.0
9.52 0~0.5 1.0~1.5 1.5~2.0
12.7 0~0.5 1.0~1.5 1.5~2.0
15.88 0~0.5 1.0~1.5 1.5~2.0
5 Check if you flared the pipe correctly. There are some
examples of incorrectly flared pipes below.
Inclined Damaged
Surface
Cracked Uneven
Thickness
6 Align the pipes and tighten the flare nuts first manually
and then with a torque wrench, applying the following
torque.
90° ± 2°
45° ± 2°
L
R 0.4 ~ 0.8
D
Outer diameter
(D, mm)
Connection Torque
Flare dimension
(L, mm)
kgf•cm N•m
6.35 140~180 14~18 8.70~9.10
9.52 350~430 34~42 12.80~13.20
2.7 500~620 49~61 16.20~16.60
15.88 690~830 68~82 19.30~19.70
CAUTION
• In case of needing brazing, you must work with
nitrogen gas blowing.
DB68-08953A-00_IM_DVM QMD_EU_EN_.indd 8 2020-02-10 오후 4:23:07
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