Hooking up my Mastertemp 400 to Intellicenter on brand new build. Wired MT400 via RS485 to IC. IC is NOT controlling the MT400 correctly. I understand that when it's working correctly, the manual heater controls should be disabled (and heater display should say so) but they are not. IC does show correct temp of water and sometimes it will call the heater to come on, but I can't set the temps and heater on/off with the IC and have it actually work as desired. It feels like I may have missed a step to get things to handshake. When I configured the heater in IC, I did not see any choice for the Mastertemp specifically, just a generic gas heater. Is there something(s) I need to do on the heater manually to prepare it to be correctly seen by the IC?