Leslie Controls Pilot Controller User Manual
Page 3
Page 3
For Back Pressure Service Only
3.
Turn adjusting nut (22) of pilot controller counter-clock-
wise until control valve is fully closed.
4.
Open inlet stop valve fully. Partially open outlet stop
valve. Turn adjusting nut (22) of pilot controller clock-
wise until control valve just begins to open. Open outlet
stop valve fully.
5.
Make final adjustments for desired controlled pressure
value. To increase controlled pressure screw adjusting
nut (22) counter-clockwise. To decrease controlled pres-
sure screw adjusting nut clockwise.
ADJUSTMENT FOR REQUIRED
PROPORTIONAL BAND
Pilot controller is now ready for operation. Adjust for required
width of proportional band as follows:
Turn adjusting know (76) counter-clockwise, moving pointer
toward minimum band setting until the output air pressure
begins to cycle. Widen the proportional band until the cycling
stops.
N.O. Valve
Figure 2. Pilot Controller with 1:1 Volume Booster Relay
Figure 4. Pilot Controller with Positioner. Split Ranging
may also be done.
Figure 3. Pilot Controller with 1:1 Volume Booster and
Reset Relay
Figure 5. Pilot Controller with Inverse Derivative
PDAP
Pressure Reduction
N.C. Valve
PRAP
Pressure Reduction
PDAP
N.O. Valve
Pressure Reduction
PRAP
N.O. Valve
Back Pressure