Toshiba RAS-M13U2DVG-E - Page 20

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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 R410A/R32 or
conventional flare tool.
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 3-2-3 Dimensions related to flare processing for R410A or R32
Table 3-2-4 Dimensions related to flare processing for R22
Table 3-2-5 Flare and flare nut dimensions for R410A or R32
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool clutch
type
Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5
5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5
3/4 19.05 1.2 0 to 0.5 1.0 to 1.5 2.0 to 2.5
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for R22
clutch type
Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
3/8 9.52 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
1/2 12.70 0.8 0 to 0.5 0.5 to 1.0 1.5 to 2.0
5/8 15.88 1.0 0 to 0.5 0.5 to 1.0 1.5 to 2.0
3/4 19.05 1.2 0 to 0.5 - -
Nominal
diameter
Outer diameter
(mm)
Thickness
(mm)
Dimension (mm)
Flare nut width
(mm)
ABCD
1/4 6.35 0.8 9.1 9.2 6.5 13 17
3/8 9.52 0.8 13.2 13.5 9.7 20 22
1/2 12.70 0.8 16.0 16.6 12.9 23 26
5/8 15.88 1.0 19.0 19.7 16.0 25 29
3/4 19.05 1.2 24.0 - 19.2 28 36
A
ØD
Fig. 3-2-1 Flare processing dimensions