7
90˚
Obliquity
Roughness
Warp
NO GOOD
OK
Pipe Forming/End Positioning
Flaring
1. Cut the pipe with a pipe cutter.
4
REFRIGERANT PIPING
2. Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufactured
for R410A are recommended.
However, the conventional tools can be used by
adjusting projection margin of the copper pipe.
• Flaring size : A (Unit : mm)
* In case of flaring for R410A with the conventional
flare tool, pull it out approx. 0.5 mm more than that of
R22 to adjust to the specified flare size. The copper
pipe gauge is useful for adjusting projection margin
size.
Imperial (Wing nut type)
B
• Projection margin in flaring :
B (Unit : mm)
Rigid (Clutch type)
A
R410A
R22
9.1
9.0
13.2
13.0
16.6
16.2
19.7
19.4
+0
- 0.4
Outer dia. of copper pipe
6.4
9.5
12.7
15.9
Outer dia.
of copper
pipe
6.4
9.5
12.7
15.9
R410A tool used
R410A
R22
0 to 0.5
(Same as left)
0 to 0.5
(Same as left)
0 to 0.5
(Same as left)
0 to 0.5
(Same as left)
Conventional tool used
R410A
R22
1.0 to 1.5
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
Outer dia. of copper pipe
6.4
9.5
12.7
15.9
R410A
R22
1.5 to 2.0
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
2.0 to 2.5
1.5 to 2.0
2.0 to 2.5
1.5 to 2.0
A
