10.2.2. R410A Tools

1.Cooper tube gauge for clearance adjustment

(used when flaring with the conventional flaring tool (clutch type))

•This gauge makes it easy to set the clearance for the copper tube to 1.0-1.5 mm from the clamp bar of the flaring tool.

Fig. 1 Copper tube gauge for clearance adjustment

2.Flaring tool (clutch type)

•In the R410A flaring tool, the receiving hole for the clamp bar is enlarged so the clearance from the clamp bar can be set to 0-0.5 mm, and the spring inside the tool is strengthened to increase the strength of the pipe- expanding torque. This flaring tools can also be used with R22 piping, so we recommend that you select it if you are buying a new flaring tool.

Fig. 2 Flaring tool (clutch type)

3. Torque wrenches

 

 

Fig. 3 Torque wrenches

 

Table 5

 

 

Conventional wrenches

R410A wrenches

 

 

 

For 1/4 (opposite side x torque)

17 mm x 18 N.m (180 kgf.cm)

17 mm x 18 N.m (180 kgf.cm)

For 3/3 (opposite side x torque)

22 mm x 42 N.m (180 kgf.cm)

22 mm x 42 N.m (180 kgf.cm)

 

 

 

For 1/2 (opposite side x torque)

24 mm x 55 N.m (180 kgf.cm)

26 mm x 55 N.m (180 kgf.cm)

4.Manifold gauge

•Because the pressure is higher for the R410A type, the conventional type cannot be used.

Table 6 Difference between R410A and conventional high / low-pressure gauges

 

Conventional wrenches

R410A wrenches

High-pressure gauge (red)

-76 cmHg - 35 kgf/cm3

-0.1 - 5.3 Mpa -76 cmHg - 53 kgf/cm3

High-pressure gauge (blue)

-76 cmHg - 17 kgf/cm3

-0.1 - 3.8 Mpa -76 cmHg - 38 kgf/cm3

•The shape of the manifold ports has been changed to prevent the possibility of mistakenly charging with another type of refrigerant.

Table 7 Difference between R410A and conventional manifold port size

 

Conventional gauges

R410A gauges

Port size

7/6 UNF 20 threads

1/2 UNF 20 threads

 

 

 

54