Do I need a fireman’s switch for my heater?

This is a device that is installed in a time clock.  It turns the heater on 30 min after the circulation pump turns on, and turns it off 30 min before the pump turns off. This prevents damage to the plumbing lines by allowing the water to cool down first.  Because we use ALL Hayward products, this is a feature already included.  It dissipates the heat automatically, therefore does not need a switch.