Timer Equalization Controls, Simplex and Duplex

Overview

American Manufacturing has developed a series of timer-based control systems specifically designed to meet the varying needs of the onsite and decentralized industry to control the flow of wastewater and to provide reliable notification of equipment failure. Utilizing timing relays, PLCs, and cycle counters, these systems are excellent for managing and monitoring the daily flows to drain fields with limited capacities.

Most time-dosed systems operate on four wide-angle differential float switches, three for pump control plus one float switch for alarm indication. Duplex pumps alternate after each pumping cycle to provide even pump wear. Duplex systems should include a pump fail alarm circuit to detect pump failure.

Time-based controls may be provided with timer override circuitry to manage excess water use. The timer override selector switch can be set in one of three positions: Off (disables the circuit), Pump and Alarm (pumps down the tank by the tether of the float switch and activates the alarm). The alarm will remain activated only for the length of time that the pump is running, providing an intermittent alarm, and therefore indicating excess water use. The selector switch may also be placed in the Pump-Only position (pumping the tank down without activating the audio/visual alarm). A cycle counter is provided with the override circuit so that in all three positions, an indication of the frequency of timer override events is available.

Additional alarms, cycle counters, and elapsed time meters can be provided for system monitoring and data acquisition.