Yesterday, I had to wire up a new Vaillant Ecotec 800 series boiler which has the pump contained in the boiler housing and also has a cylinder overheat thermostat. All the external controls are in the airing cupboard directly above.
I have had to modify the Sundial S-plan wiring diagram a little bit to incorporate the overheat stat and the permanent live to the boiler.
This is the new layout of the 10-way wiring station - [ATTACH]1555[/ATTACH].
I would be grateful if one of my more learned colleagues would cast an eye over it for errors. If the diagram is correct, it can be moved to the downloads section for the benefit of others.
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Guest Message by DevFuse
S-plan with pump overrun wiring diagram
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