Duplex System
A Duplex System is recommended whenever possible. It consists of two individual100% pumps installed in one sump. The duplex arrangement provides a standby unit if one pump should become disabled and also the added protection of double capacity for peak loads.
The two pumps alternate (lead /lag operation) by the two float switch assemblies mounted on the sump cover and a solid-state alternator mounted in the control panel.
A typical Duplex System consists of:
- Two (2) Swaby pumps (Model and Size determined by Performance Requirements). Ductile Iron construction, one piece 416 stainless steel shaft, grease lubricated bronze bearings, with lubrication lines and pump mounted grease fittings.
- Two (2) Motors, ODP Enclosure, (Hp. Phase, Voltage, determined by performance and specifications requirements)
- Two (2) Float Switch assemblies, Nema 1 with pedestal mounted float switch, stainless steel float rod, and adjustable float positioner.
- One (1) compression type high water alarm switch Nema 1 with signal to control panel.
- One (1) Steel Cover, (square, or round as determined by specifications requirements) with cutouts for two pumps, two float switch assemblies, manhole opening and vent connection.
- One (1) Basin, (round or rectangular as determined by specifications) Concrete or Fiberglass. Diameter and depth as determined by specification and performance requirements.
- One (1) Duplex Control Panel, (enclosure, voltage as determined by specifications) with the following:
One (1) Through door disconnect with interlock
Two (2) Magnetic Starters with overload protection.
Two (2) HOA Selector Switches
Two (2) Motor Run Lights
One (1) Control Transformer
One (1) Solid State Alternator to alternate lead/lag pumps and parallel operation
One (1) Terminal Strip
One (1) High water level alarm with horn, light, silencing switch.
