Hello all. I've recently dove into getting a spa. Trying to retrofit in a gas heater. The Balboa control board has "Slave Heater J101" and "Slave Heater J100" on the board. Since it's not connected, I'm unsure weather these are 240, or continuity?
I would like to piggy back my current pool heater to be plumbed into the spa and forget the electric element.