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Looking for a circuit that can control a contactor. It needs to be adjustable on off time.

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Looking for a circuit that can control a contactor. It needs to be adjustable on off time.

The circuit will be controling a blowdown valve on a small boiler. When the boiler is running i need to open a 120vac valve for several minutes every hour. If the boiler shuts off i need to be able to disable this timer in the off position until the boiler starts back up. It starts and stops automatically. Usally once or twice a week. 120 vac is available as well as contacts to signal when running ad not running. Any ideas would be great. Off the shelf components would also help.
asked Dec 9, 2015 by daverepair (120 points)

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Consider a Repeat Cycle timer.  They are not that expensive.  Hear is a link for one.  http://www.rammeter.com/atc-automatic-timing-controls-422ar-100-s0-x-multi-range-repeat-cycle-timer.php?gclid=CMbd2umBh8sCFQepaQodRg0Kbw
answered Feb 20, 2016 by gilshultzhome-com (17,730 points)

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