Samsung AM AXV Series Installation Manual page 25

Cutting or flaring the pipes
1 Make sure that you prepared the required tools.
– Pipe cutter, Deburring tool, 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.
– Refer to below illustrations for correct and incorrect
examples of cut edges.
90°
3 To prevent a gas leak, remove all burrs at the cut edge of the
pipe using a Deburring tool.
4 Carry out flaring work using flaring tool as shown below.
[Flaring tools]
Clutch type
A
Flaring bar
Pipe
Pipe
D diameter
A
[D (mm)]
Ø 6.35
Ø 9.52
Ø 12.70
Ø 15.88
Oblique Rough Burr
Wing nut type
Yoke
Flaring bar
Pipe
Flare nut
Depth of flaring part [A (mm)]
Using conventional
Using
flaring tool
flaring
tool for
Clutch Wing nut
R-410A
type type
0~0.5 1.0~1.5 1.5~2.0
0~0.5 1.0~1.5 1.5~2.0
0~0.5 1.0~1.5 1.5~2.0
0~0.5 1.0~1.5 1.5~2.0
5 Check that you flared the pipe correctly.
– Refer to below illustrations for correct and incorrect
examples of flared pipe.
Correct Inclined Damaged
Surface
CAUTION
• If foreign matters or burrs are not removed after cutting pipe,
refrigerant gas may leak.
• If foreign matters enter inside the pipe, important interior
parts of the unit may get damaged or product efficiency will be
reduced. So, the direction of pipe should be downward during
pipe cutting or flaring.
Connecting the flared pipes
• Check if the flaring is properly done according to the standard
size.
• Align the center of the piping and tighten the flare nut with
your hands. Then, tighten the flare nut with torque wrench in a
direction of the arrow indicated in below illustration.
• Make sure to use ester oil to coat the flare connection section.
Pipe
Flare connection Flare nut
section
Outer Connection
diameter torque dimension
(D, mm) (N·m) (L, mm)
14~18 8.7~9.1
Ø 6.35
Ø 9.52 34~42 12.8~13.2
49~61 16.2~16.6
Ø 12.70
68~82 19.3~19.7
Ø 15.88
Ø 19.05 100~120 23.6~24.0
CAUTION
• Blowing Nitrogen gas should be done when welding the pipe.
• Make sure to use the provided flare nut.
• Make sure that there are no cracks or twisted part when you
need to bend the pipe.
• Do not fasten the flare nut with excessive strength.
• R-410A is a high pressure refrigerant and there is a risk of
refrigerant leakage if the flare connection is not coated with
ester oil. Therefore, apply ester oil to coat the flare connection
area.
Cracked Uneven
Thickness
Monkey
wrench
Torque
wrench
Flare
Flare shape (mm)
R 0.4~0.8
L
English
D
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