Wiring Diagram Boiler System. Note a pump must be installed in the hot supply line between the outdoor furnace and thermostatic valve. I have installed a vaillant ecotec pro system boiler on an s paln system.
This diagram illustrates how simple the heating system connected to a combi boiler is. Its just a guideline on how the average boiler is wired. Please use the form to order printed copies of the document you selected.
This diagram shows the wiring layout using the most typical components.
Once there is 230v on the orange wire the boiler will fire up and run until the demand is satisfied. Unique wiring diagram for gas central heating diagram. For full information about the c plan design and wiring you can download the installation instructions pdf from the honeywell uk website here. Contains all the essential wiring diagrams across our range of heating controls.