-21-
Fig. 10 Water Regulating Valve
2) Checking pressure control settings
Suction pressure setting: Cut out=5 psig; Cut in=25 psig; Differential=20 psig
Head pressure setting: Cut out=230 psig; Cut in=150 psig; Differential=80 psig
It is necessary to adjust the setting in the field to reach the correct cycle time.
Fig. 11 Adjustable Pressure Control
3) A fan speed control may be used to adjust the air flow to achieve the specified
CFM. The fan will run from the minimum speed to full speed with the control
knob at the lowest and highest speed position. To adjust the minimum speed,
turn control knob to the lowest speed position, then rotate the setting (located
on the side or front) clockwise to decrease the minimum speed or counter-
clockwise to increase the minimum speed. The minimum speed should be
adjusted until it supplies the required CFM.
