ALTDM-2HP-DV Control Panel

The ALTDM2HPDV is designed to operate a duplex lift station with an alarm. This control can be used for pump up or pump down operation. It has three incoming power circuits: an independent circuit for each pump and a 120 VAC circuit for the Alarm. This setup allows the control to operate pumps from 120 VAC 4/10 HP up to 240 VAC 2 HP with one control. The pump operation is controlled on demand by a three-float setup. The three floats are primary pump On/Off, Alarm, and secondary pump On/Off float. This control is a duplex pump operation and will alternate the pump load between both pumps. The control will switch pumps at the end of every pump cycle so the opposing pump will start on the next cycle. The alternating relay is switchable to lock the pump load onto either pump so if one pump needs to be removed for service or replacement, the other pump will carry the full pump load.

This control panel will operate two 120/208/240 VAC single-phase 2 HP pumps or smaller. There are three circuit breakers in this control. Each pump will have a 20 Amp double pole circuit breaker, and the alarm uses a 10 Amp single pole circuit breaker. The alarm is designed to be used with a float switch. When the float switch closes, the 360 degrees top-mounted red alarm light will come on and the Piezoelectric buzzer will sound. This control also has a latching alarm feature, meaning when the Alarm float closes the alarm will stay on even if the tank returns to a normal level. This alarm must be manually reset by turning the Alarm circuit breaker off, then back on. There is an alarm test and buzzer silence switch mounted in the door of the enclosure. This control is mainly used to pump sewage from a septic holding tank to a treatment unit using a solids handling pump or pumping treated effluent water from a septic holding tank to the dispersal area.

The enclosure has a NEMA rating of 4X, which provides protection from falling dirt, falling liquids, hose-directed water, and corrosive agents. The 14”x12”x6” enclosure is made of Polycarbonate and has a hinged lockable door with latches and included screws to secure the door if required. All electrical components are mounted inside the enclosure on an aluminum back plate.


  • 14” x 12” x 6” Polycarbonate Enclosure, NEMA 4X
  • Hinged lockable door with two latches
  • Three circuit breakers for the protection of components
  • Demand operation using pump rated wide-angle floats
  • Pump test switch inside the enclosure to check pump operation
  • Alarm light and piezoelectrical buzzer
  • Alarm test and buzzer silence switch
  • Captive terminal strip for field wiring