8
Installation Procedure
English
Installation Pr
oc
edur
e
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
