Panasonic SCROLL C-SB Series - High-Pressure Switch

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Figure 2-2 Position of crankcase heater for C-SB models
Figure 2-3 Position of crankcase heater fo C-SC models
5) High-Pressure Switch
Panasonic scroll compressors require a high-pressure switch in order to protect the compressor during
blocked fan or fan failure conditions. The recommended settings are shown in Table 2-5
Table 2-5 High Pressure Switch Setting
Refrigerant
Cut-Off setting
R22
435 psig (3.0MPa G)
R407C
464 psig (3.2MPa G)
R410A
602 psig (4.15MPa G)
R134a
348 psig (2.4MPa G)
Bottom
Case
Crankcase
Heater