Wiring diagrams
6 systems, every wire listed
In short
These diagrams come from working circuits in the simulator, not from a drawing. Each page lists every wire from terminal to terminal, the wiring-centre block numbering, the demand truth table the system must pass, and the course that builds it one connection at a time.
If this is your home: this page is written for heating engineers. Mains wiring and gas appliances are not DIY jobs; call a Gas Safe registered engineer. If you smell gas, leave the building and call the National Gas Emergency Service on 0800 111 999.
Your first fault is waiting.
Every system starts as parts on a blank canvas in the free demo.