8
English
Ins
tallation Pr
oc
edur
e
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
Oblique
90°
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.
<Flaring tool>
Clutch type
Die
Copper pipe
Flare nut
Copper pipe
York
Die
A
Wing nut type
(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
12.70
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.
R 0.4~0.8
90°±2°
45
°±2°
L
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
2.70
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.
DVM Boracay_IM_EN_DB68-06417A-00_16.09.22.indd 8
2016/9/22 11:29:12
