15
ENGLISH
Direction of the pipe when brazing
X
X
Brazing the pipe should be done with the pipe headed downward or horizontally .
X
X
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
X
X
Make sure that you prepared the required tools .
- Pipe cutter, reamer, flaring tool and pipe holder, etc .
X
X
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 .
Oblique
Rough
Burr
Pipe
Pipe cutter
X
X
To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer .
X
X
Carry out flaring work using flaring tool as shown below .
A
Flaring bar
Pipe
York
Flaring bar
Pipe
Flare nut
Clutch type
Wing nut type
[Flaring tool]
Pipe diameter [mm (inch)]
A [mm (inch)]
Flare tool for R-410A
clutch type
Conventional flare tool
Clutch type
Wing nut type
Ø6 .35 (1/4)
0~0 .5 (0~0 .776)
1 .0~1 .5 (0 .039~0 .059)
1 .5~2 .0 (0 .059~0 .079)
Ø9 .52 (3/8)
0~0 .5 (0~0 .776)
1 .0~1 .5 (0 .039~0 .059)
1 .5~2 .0 (0 .059~0 .079)
Ø12 .70 (1/2)
0~0 .5 (0~0 .776)
1 .0~1 .5 (0 .039~0 .059)
1 .5~2 .0 (0 .059~0 .079)
Ø15 .88 (5/8)
0~0 .5 (0~0 .776)
1 .0~1 .5 (0 .039~0 .059)
1 .5~2 .0 (0 .059~0 .079)
X
X
Check that you flared the pipe correctly .
- There are some examples of incorrectly flared pipes below .
Uneven Thickness
Cracked
Damaged Surface
Inclined
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
efficiency will be reduced . So, the direction of pipe should be downward during pipe cutting or flaring .
CAUTION
DVM S Eco_IM_03408A-05_EN.indd 15
2016-11-11 오후 1:27:50
