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2

As a general rule, Archon is correct -- it's better to implement a deadband as two sensors (one for the high setpoint and the other for the low setpoint) rather than relying on a timer to avoid short cycling and other such erratic behavior. If you cannot obtain dedicated fill pump controllers, but a NO and a NC float switch are available, a crude fill pump ...


2

You are correct that a dead-band is needed to prevent the pump from constantly cycling on and off when it is near the set point. That is why these systems use a high and low float or sensor. It seems like you are making this way too difficult by timing the pump off instead of using a second float. A fill pump controller like this would do what you want. ...



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