Specifications

Multiplex Company, Inc.
Component Parts Workbook
9
00218011 Revision B (KAK) 31 July, 2000
Low Water Pressure Safety Circuit
If water pressure is greater than 4 psi (0.3 bar), the pressure switch will be open and not allow
electricity to pass, and the relay will be closed and allow electricity to flow to the motor.
If the water pressure drops below 4 psi (0.3 bar), the pressure switch will close and allow
electricity to flow to the relay, heating the relay, causing it to open, stopping the electricity from
flowing to the motor.
If the water pressure then goes above 4 psi (0.3 bar), the pressure switch will again open,
stopping the electricity from flowing to the relay, the relay will start to cool, after about 3 minutes
the relay will close, again sending electricity to the motor.
S12296.pm5
Pressure Switch
Motor
Relay
Line connects to the Pump
Inlet Water Supply