Flooded heater - safe to try and turn on or no?

Standard is 4 actuators - RETURN, SUCTION, plus two you can assign to any circuit.

You can add a valve expansion board to control a few more actuators.
Ok, will probably add that new heater bypass valve automation to round 2. First round is getting the heater working again and a new SWG. The pump is much louder now after the flood but still seemed to be working fine, so going to leave that alone for the time being.

thanks again.