I`ve had a new boiler installed (Ferroli Tempra 30 - with integral pump) & I`ve chosen to do the wiring myself. The system is an S plan (boiler, 2 zone valves for CH & HW, room stat, cylinder stat).
What I can`t figure out is the following: The boiler has a mains cable (live, neutral, earth) coming out of it which presumably needs to connect up somewhere. There is also a junction box within the boiler which has 8 terminals. According to the wiring diagram, I need to connect up terminals 1 & 2 (on the boiler) to grey and orange outputs of the zone valves. (Terminals 1 & 2 currently have a loop wire between them) This is confusing as I don`t know whether to connect both the mains cable to permanent mains (which means the boiler would be on permanently (unless I take out the loop wire between terminals 1&2 on the boiler?) and also connect up terminals 1& 2 to the zone valves Very confused - help !?!
John