AIR CPU1001
9
oPeraTIon
Adjustment of pressure switch
The compressor stop pressure and start pressure is preset from the factory and
it does not normally require adjustment. If it is necessary to change the preset
settings, these instructions should be followed carefully.
ATTENTION:
The compressor is constructed and approved for a maximum
pressure as stated under Technical Specifications. Do not adjust to a higher
pressure. Higher working pressure will reduce the lifetime of the compressor.
First unscrew the lid of the pressure switch. Adjust the maximum pressure by
adjusting the two springs marked A (Figure 4). Turning the nuts clockwise will
result in a higher pressure. Adjust the two springs identically.
The difference between maximum and minimum pressure is the pressure dif-
ference. Adjust the pressure difference by adjusting the spring marked B (Fig-
ure 4). Turning the nut clockwise will result in a higher pressure difference and
lower start pressure.
figure 4:
Adjustment of pressure switch
