I would be very grateful if anyone there could spare a moment to help me with this. I want to install a Salus RT300 RF unit with my Potterton Suprima HE boiler, instead of the existing room thermostat on the wall in the hall. I have read the posts and looked at the Salus and Potterton instructions and I can see that the installation is fairly simple - but also potentially £££expensive if I make a mistake! Here are pictures of the relevant bits (Potterton wiring block, Salus Receiver, Salus Diagram, and existing Honeywell Room thermostat, with red wire and yellow wire). could someone please tell me what to connect to what so I don't blow the Potterton PCB? Thank you very much. Chris Sykes