Three Phase Duplex Alternating Pump Control with Override

The Model 322 control panel is designed to control two 208/240/480VAC three phase pumps in industrial and commercial water and sewage systems. The controller is provided with a pump selector switch that can be set to alternate the pumps to equalize wear or to call either pump to activate first with the other pump to activate in lag condition. If an alarm occurs, the alarm activates the audible-visual system. The alarm conditions include: high water, float out-of-sequence, pump fail-to-run, seal failure (optional). Common applications include: lift stations, pump chambers, and irrigation systems.


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322 panel


Panel Features:
  • NEMA 4X enclosure for indoor/outdoor use
  • Red alarm beacon provides 360° visual check of alarm condition
  • Alarm horn provides audio warning of alarm condition
  • Exterior alarm test/normal/silence switch allows horn and light to be tested and horn to be silenced in an alarm condition; alarm automatically resets once alarm condition is cleared
  • Horn silence relay
  • IEC motor contactors control pumps by switching electrical lines
  • Multi-tap transformer (208/240/480 VAC primary) provides 120V control voltage
  • Motor protective switches provide adjustable overload, branch circuit protection and pump disconnect
  • Alternating circuit board (U.S. patent 5,909,532) provides pump control and alternation
  • Hand/Off/Auto (HOA) switches for manual pump control
  • Control On/Off switch
  • Green pump run indicator lights
  • Alarm and control fuses/indicators
  • Float switch terminal block
  • Input power terminal block
  • Ground lugs
  • For a complete listing of available options, please view the backside of the catalog page.
UL/cUL Listed
Five-Year Limited Warranty


  • 14 x 12 x 6 inches (35.56 x 30.48 x 15.24 cm)
  • NEMA 4X (ultraviolet stabilized thermoplastic with removable mounting feet for indoor/outdoor use)
  • 83 – 85 decibel rating

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