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/cm
3
-0.1 - 5.3 Mpa -76 cmHg - 53 kgf
cm
3
High-pressure gauge (blue)
-76 cmHg - 17 kgf/cm
3
-0.1 - 3.8 Mpa -76 cmHg - 38 kgf
cm
3
- 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
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