CS-HE9DKE CU-HE9DKE / CS-HE12DKE CU-HE12DKE

Fig. 11 Relation between the flare nut structure and flaring tool end

Table 11 R410A flaring dimensions

Nominal

Outside

Wall thickness

 

 

 

A (mm)

 

 

diameter

diameter

(mm)

 

 

 

 

 

 

R410A flaring

 

 

Conventional flaring tool

 

 

(mm)

 

tool, clutch type

 

 

 

 

 

 

Clutch type

Wing-nut type

1/4

6.35

0.8

0 - 0.5

 

1.0

- 1.5

1.5

- 2.0

3/8

9.52

0.8

0 - 0.5

 

1.0

- 1.5

1.5

- 2.0

1/2

12.70

0.8

0 - 0.5

 

1.0

- 1.5

2.0

- 2.5

 

 

Table 12 R22 flaring dimensions

 

 

 

 

Nominal

Outside

Wall thickness

 

 

 

A (mm)

 

 

diameter

diameter

(mm)

 

 

 

 

R410A flaring

 

 

Conventional flaring tool

 

 

(mm)

 

tool, clutch type

 

 

 

 

 

 

Clutch type

Wing-nut type

1/4

6.35

0.8

0 - 0.5

 

0.5

- 1.0

1.0

- 1.5

3/8

9.52

0.8

0 - 0.5

 

0.5

- 1.0

1.0

- 1.5

1/2

12.70

0.8

0 - 0.5

 

0.5

- 1.0

1.5

- 2.0

Table 13 R410A flare and flare nut dimensions Unit: mm

Nominal

Outside

Wall thickness

A +0, -0.4

B

C

D

Flare nut

diameter

diameter (mm)

(mm)

 

dimension

dimension

dimension

width

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

16.6

16.0

12.9

23

26

 

 

Table 14 R22 flare and flare nut dimensions Unit: mm

 

 

Nominal

Outside

Wall thickness

A +0, -0.4

B

C

D

Flare nut

diameter

diameter (mm)

(mm)

 

dimension

dimension

dimension

width

1/4

6.35

0.8

9.0

9.2

6.5

13

17

3/8

9.52

0.8

13.0

13.5

9.7

20

22

1/2

12.70

0.8

16.2

16.0

12.9

20

24

2.Procedure and precautions for flare connection

a.Check to make sure there is no scratches, dust, etc., on the flare and union.

b.Align the flared surface with the axial center of the union.

c.Use a torque wrench, and tighten to the specified torque. The tightening torque for R410A is the same as the conventional torque value for R22. Be careful, because if the torque is too weak, it may lead to a gas leak. If it is too strong, it may split the flare nut or make it impossible to remove the flare nut.

Table 15 R410A tightening torque

Nominal

Outside

Tightening torque

Torque wrench tightening torque

diameter

diameter (mm)

N.m (kgf.cm)

N.m (kgf.cm)

1/4

6.35

14 - 18 (140 - 180)

18 (180)

3/8

9.52

33 - 42 (330 -420)

42 (420)

1/2

12.70

55 (550)

55 (550)

61