jCOSbrew
Well-Known Member
You could actually send gnd signal for relay coil through the float switch.
+12v ---- relay coil ---- float switch --- GND
The NO contacts on the relay will enable 120v power to pump AND pid output to Ssr. You don't want the element ON while pump is OFF.
The auto/manual switch on your panel would bypass the float switch and provide Gnd to relay coil allowing the pump and element to operate regardless of the fluid level.
+12v ---- relay coil ---- float switch --- GND
The NO contacts on the relay will enable 120v power to pump AND pid output to Ssr. You don't want the element ON while pump is OFF.
The auto/manual switch on your panel would bypass the float switch and provide Gnd to relay coil allowing the pump and element to operate regardless of the fluid level.