g. Turn on the outside power source to check the
adjustment. To check the CUT-IN pressure, open the
drain cock and allow air pressure to fall below 165 psi.
If the differential is increased only by
Close the drain cock, and the compressor should start
clockwise, the CUT-IN pressure
changes only slightly, and the CUT-
h. Install the cover on the pressure switch.
OUT pressure rises.
Figure 5-15. Pressure switch adjusting and differential screws.