Specifications

Multiplex Company, Inc.
Complete System Overview
7
00218010 Revision B (KAK) 31 July, 2000
When the carbonator tank is full, carbonated water is touching both the low and high
electrodes and the liquid level control will not supply power to the carbonator motor.
When carbonated water is drawn out of the tank, it will first fall below the high electrode. This
opens the circuit between the G and H terminals of the liquid level control.
The continued draw of carbonated water from the tank will cause the level of carbonated
water to fall below the low electrode. This opens the circuit between the G and L terminals of
the liquid level control. With both circuits open, the liquid level control directs power to the
carbonator motor and the pump, turning it on and replenishing the supply of carbonated water in
the tank.
The carbonated water level will quickly rise to the low electrode and close the circuit between
the G and L terminals of the liquid level control.
Continuing to pump water into the tank, the level will next rise to the high electrode and close
the circuit between the G and H terminals of the liquid level control. This turns the motor
off and stops water from being pumped into the tank.
The electrodes work with the liquid level control to maintain the level of carbonated water in
the tank. Continuity through the carbonated water from both electrodes (low and high) to the tank
(ground) turns the carbonator motor off. No continuity from both electrodes to the tank turns the
carbonator motor on.
Liquid Level Control (Electrode Circuit) (continued)