PRESSURE SWITCH INSTRUCTIONS continued …..
SET POINT ADJUSTMENTS
The pressure switch is set at the factory to the operating point(s) marked on the outside of the switch housing. Before
readjusting the switch, cyle it to determine actual operating points.
Non-Adjustable Differential
The range adjustment nut ( Item H, Figure 3 ) or knob ( Item C, Figure 3 ) adjusts both setpoints by the same amount.
To adjust the operating points :
1.
Place a flat blade screwdriver in a range adjustment nut slot.
2.
Rotate the nut to the left to increase the operating points or to the right to decrease the operating set points.
Adjustable Differential
The range adjustment nut or knob determines the decreasing setpoint. The adjusting screw ( Item J, Figure 3 ) determines the
increasing setpoints. To adjust the operating points :
1.
Adjust the decreasing setpoint ( see steps 1 and 2 above ).
2.
Turn the adjusting screw clockwise ( to raise the increasing setpoint ). This adjustment does not affect the
decreasing setpoint.
FIGURE 3
