I have a Hayward Superpump, single speed and a Hayward H series gas heater with electronic ignition. I have a mechanical timer that turns off my heater and then, after a short delay, turns off the pump.
I'm planning to buy a Pentair Superflo VS pump, model 342001. I would like to run the pump at slow speed at night to keep the water circulating. It will be below the minimum PSI for the heater.
I realize if the pressure is too low, the heater's low pressure switch will trip and turn off the heater. But, should I be relying on this as a nightly "off switch" for the heater?
Or, should I continue to use the mechanical timer to turn off the heater an hour before the VS pump goes into low mode?
I'm just wondering if the low pressure switch is designed to be used in that fashion.