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c) Insertion of Flare Nut
d) Flare Processing
Make certain that a clamp bar and copper pipe have been
cleaned.
By means of the clamp bar, perform the flare processing
correctly.
Use either a flare tool for
Flare processing dimensions differ according to the type
of flare tool.
When using a conventional flare tool, be sure to secure
"dimension A" by using a gauge for size adjustment.
Table 6-2-3 Dimensions related to flare processing for R410A or R32 / R22
Outer
Nominal
Thickness
diameter
diameter
(mm)
1/4
6.4
3/8
9.5
1/2
12.7
5/8
15.9
3/4
19.1
Nominal
Outer
diameter
diameter (mm)
1/4
6.4
3/8
9.5
1/2
12.7
5/8
15.9
3/4
19.1
Nominal
Outer
diameter
diameter (mm)
1/4
6.4
3/8
9.5
1/2
12.7
5/8
15.9
3/4
19.1
R410A/R32 or conventional flare tool.
Flare tool for
(mm)
R410A, R22
clutch type
0.8
0 to 0.5
0.8
0 to 0.5
0.8
0 to 0.5
1.0
0 to 0.5
1.2
0 to 0.5
Table 6-2-4 Flare and flare nut dimensions for R410A of R32
Thickness
(mm)
0.8
0.8
0.8
1.0
1.2
Table 6-2-5 Flare and flare nut dimensions for R22
Thickness
(mm)
0.8
0.8
0.8
1.0
1.0
Fig. 6-2-1 Flare processing dimensions
A (mm)
Conventional flare tool
(R410A or R32)
Clutch type
Wing nut type
1.0 to 1.5
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
1.0 to 1.5
2.0 to 2.5
1.0 to 1.5
2.0 to 2.5
Dimension (mm)
A
B B
C
9.1
9.2
6.5
13.2
13.5
9.7
16.6
16.0
12.9
19.7
19.0
16.0
24.0
—
19.2
Dimension (mm)
A
B B
C
9.1
9.2
6.5
13.0
13.5
9.7
16.2
16.0
12.9
19.4
19.0
16.0
23.3
24.0
19.2
- 23 -
ØD
A
Conventional flare tool
(R22)
Clutch type
Wing nut type
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
1.5 to 2.0
0.5 to 1.0
1.5 to 2.0
—
—
Flare nut width
(mm)
D
13
17
20
22
23
26
25
29
28
36
Flare nut width
(mm)
D
13
17
20
22
20
24
23
27
34
36
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Troubleshooting
