Panasonic CS-VC70KE, Service Manual

Page: 26 / 66

9.2.2. R410A Tools
1. Copper 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 tool 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) 17mm X 18 N m (180 kgf cm) 17mm X 18 N m (180 kgf cm)
For 3/8 (opposite side x torque) 22mm X 42 N m (420 kgf cm) 22mm X 42 N m (420 kgf cm)
For 1/2 (opposite side x torque) 24mm X 55 N m (550 kgf cm) 26mm X 55 N m (550 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 gauges R410A gauges
High-pressure gauge (red) -76 cmHg - 35 kgf/cm -0.1 - 5.3 Mpa
-76 cmHg - 53 kgf/cm
Low-pressure gauge (blue) -76 cmHg - 17 kgf/cm -0.1 - 3.8 Mpa
-76 cmHg - 38 kgf/cm
·
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 7/16 UNF 20 threads 1/2 UNF 20 threads
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CS-VC70KE / CU-VC70KE / CS-VC90KE / CU-VC90KE / CS-VC120KE / CU-VC120KE