S Plan wiring diagram for fully pumped central heating and hot water systems with pump overrun with valves, stats, boiler and power supply.. An S Plan central heating system diagram can be helpful in visualizing how the system works. The diagram will show the connections between the boiler, thermostat, and radiators.
This video covers the wiring and electrical operation of an S plan system with two 2-port valves. Wiring diagrams and further information continues below. View on Youtube. System Wiring This diagram shows the wiring layout using the most typical components. Here, coloured wires indicate the permanent mains supply to the boiler and programmer. The coloured valve wires are also shown. Other.. Learn about S Plan Plus wiring diagrams for zoned valves and combination boilers, including step-by-step guidance for heating system installation and fault finding.