
Check out the Zoeller YouTube Channel for Webinars, Tips, Trainings, and Product Videos!
Control Panels
Use these control panels in duplex systems to alternate use of the pumps with each cycle or run both simultaneously in the event of high water levels.
An Electrical Alternator is used on a duplex pump application where automatic electrical cycling of the pump is desired for added protection in residential or commercial applications. With one pump operating to handle normal flow, a second pump becomes operational in the event the water level continues to rise. The built-in alarm system, a standard feature, can be connected to sound when the second pump becomes operational (3-float switch system) or independently (4-float switch system).
All electrical systems must be installed by a qualified electrician and according to the National Electrical Code (see section 430-71 through 430-113, plus any others that apply).
1. Operation can begin after the following:
2. When the ‘Stop’ and ‘Lead’ floats are closed, pump 1 will energize and the pump 1 run light will illuminate. Pump 1 will remain operational until the ‘Stop’ float opens.
3. The next time the ‘Stop’ and ‘Lead’ floats are closed the alternating circuit will energize pump 2 and the pump 2 pump run light will illuminate. Pump 2 will remain operational until the ‘Stop’ float opens. This cycle will repeat each time the fluid level rises and falls.
4. If the fluid level continues to rise after the first pump has been energized, the ‘Lag’ float will close. When the ‘Lag’ float has closed the second pump will energize. Both pumps will remain operational until the ‘Stop’ float opens.
5. In a three-float system when the ‘Lag’ float is closed, the following will also occur:
6. In a four-float system, the alarm float should be the third float causing an alarm to sound when the lead pump fails to operate or the rate of in flow into the basin exceeds the capacity of one pump. When the alarm float is closed the following will occur:
As the liquid level continues to rise the fourth float will close, energizing the lag pump. The lag pump and the lead pump will remain energized until the “Stop” float opens.
*NOTE: In Duplex systems where it is considered normal for two pumps to operate in tandem during peak flow conditions, the third and fourth float may be reversed.
7. The audible high water horn can be silenced by pressing the alarm silence button. When the ‘Alarm’ float opens the external high water light, audible high water horn and dry auxiliary contacts will be reset.
Notes
600 and X600 series single phase pumps require special panels that include start components. See FM3459 for correct panel selection.
All variable level float switches in this section are mechanically activated and do not contain mercury.
An Electrical Alternator is used on a duplex pump application where automatic electrical cycling of the pump is desired for added protection in residential or commercial applications. With one pump operating to handle normal flow, a second pump becomes operational in the event the water level continues to rise. The built-in alarm system, a standard feature, can be connected to sound when the second pump becomes operational (3-float switch system) or independently (4-float switch system).
All electrical systems must be installed by a qualified electrician and according to the National Electrical Code (see section 430-71 through 430-113, plus any others that apply).
1. Operation can begin after the following:
2. When the ‘Stop’ and ‘Lead’ floats are closed, pump 1 will energize and the pump 1 run light will illuminate. Pump 1 will remain operational until the ‘Stop’ float opens.
3. The next time the ‘Stop’ and ‘Lead’ floats are closed the alternating circuit will energize pump 2 and the pump 2 pump run light will illuminate. Pump 2 will remain operational until the ‘Stop’ float opens. This cycle will repeat each time the fluid level rises and falls.
4. If the fluid level continues to rise after the first pump has been energized, the ‘Lag’ float will close. When the ‘Lag’ float has closed the second pump will energize. Both pumps will remain operational until the ‘Stop’ float opens.
5. In a three-float system when the ‘Lag’ float is closed, the following will also occur:
6. In a four-float system, the alarm float should be the third float causing an alarm to sound when the lead pump fails to operate or the rate of in flow into the basin exceeds the capacity of one pump. When the alarm float is closed the following will occur:
As the liquid level continues to rise the fourth float will close, energizing the lag pump. The lag pump and the lead pump will remain energized until the “Stop” float opens.
*NOTE: In Duplex systems where it is considered normal for two pumps to operate in tandem during peak flow conditions, the third and fourth float may be reversed.
7. The audible high water horn can be silenced by pressing the alarm silence button. When the ‘Alarm’ float opens the external high water light, audible high water horn and dry auxiliary contacts will be reset.
Notes
600 and X600 series single phase pumps require special panels that include start components. See FM3459 for correct panel selection.
All variable level float switches in this section are mechanically activated and do not contain mercury.