Samsung AM***XMDCH Series Installation Manual page 15

Direction of the pipe when brazing
Brazing the pipe should be done with the pipe headed downward or horizontally.
Avoid brazing with the pipe headed upward.
The test liquid used to detect leakage after pipe brazing should be the designated one.
The use of the test liquid containing sulfur element may cause pipe corrosion.
CAUTION
Cutting or Flaring the pipes
Make sure that you prepared the required tools.
- Pipe cutter, reamer, flaring tool and pipe holder, etc.
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
To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
Carry out flaring work using flaring tool as shown below.
[Flaring tool]
Clutch type
Pipe diameter [mm (inch)]
Check that you flared the pipe correctly.
- There are some examples of incorrectly flared pipes below.
Correct
If foreign matters or BURRs are not removed after cutting pipe, refrigerant gas may leak.
If foreign matters enter inside the pipe, the important interior parts of the unit may get damaged or product
CAUTION
efficiency will be reduced. So, the direction of pipe should be downward during pipe cutting or flaring.
Wing nut type
Flare tool for R-410A
clutch type
Ø6.35 (1/4) 0~0.5 (0~0.776)
Ø9.52 (3/8) 0~0.5 (0~0.776)
Ø12.70 (1/2) 0~0.5 (0~0.776)
Ø15.88 (5/8) 0~0.5 (0~0.776)
Inclined Damaged Surface
Oblique Rough
A
Flaring bar
Pipe
A [mm (inch)]
Clutch type
1.0~1.5 (0.039~0.059)
1.0~1.5 (0.039~0.059)
1.0~1.5 (0.039~0.059)
1.0~1.5 (0.039~0.059)
Cracked
Burr
York
Flaring bar
Pipe
Flare nut
Conventional flare tool
Wing nut type
1.5~2.0 (0.059~0.079)
1.5~2.0 (0.059~0.079)
1.5~2.0 (0.059~0.079)
1.5~2.0 (0.059~0.079)
Uneven Thickness
15