Hi guys can someone explain to me how the wiring of UFH with the use of actuators is wired into an S plan please? its a 3 zone valve set up, Rads upstairs, HW, UFH downstairs. I'm okay with s plan wiring on a simple 2 channel etc but first time doing UFH with actuators and separate room stats. I cant find a simple explanation as to how it all ties together. I think we are going to run the UFH and Rads on the 2 channel and HW on a timer. We have a polypipe wiring centre for the UFH actuators and polypipe UFH manifold. i just want to understand what does the switching and so on. TIA