Panasonic CU-E18CKR Service Manual page 56

Table 5
For 1/4 (opposite side x torque)
For 3/3 (opposite side x torque)
For 1/2 (opposite side x torque)
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
High-pressure gauge (red)
High-pressure gauge (blue)
- 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
Port size
Fig. 3 Torque wrenches
Conventional wrenches
17 mm x 18 N.m (180 kgf.cm)
22 mm x 42 N.m (180 kgf.cm)
24 mm x 55 N.m (180 kgf.cm)
Conventional wrenches
-76 cmHg - 35 kgf/cm
-76 cmHg - 17 kgf/cm
Conventional gauges
7/6 UNF 20 threads
R410A wrenches
17 mm x 18 N.m (180 kgf.cm)
22 mm x 42 N.m (180 kgf.cm)
26 mm x 55 N.m (180 kgf.cm)
R410A wrenches
-0.1 - 5.3 Mpa -76 cmHg - 53 kgf/
3
-0.1 - 3.8 Mpa -76 cmHg - 38 kgf/
3
R410A gauges
1/2 UNF 20 threads
cm
3
cm
3