Discuss Simplified S-Plan and Y-Plan Wiring diagrams in the Central Heating Systems area at ElectriciansForums.net
The diagram can be used as a boiler with a pump overrun as well, you just take the pump live / neutral / Earth from the wiring center and run it to the boiler terminals. It's just a guideline on how the average boiler is wired. It can be adapted how you need it.
Is it me but their seems to be multiple ways to wire s plan?
John Wards youtube video shows one way & Chris Kitcher shows a slightly different way
Sorry cant seem to delete duplicate pic using my ipad.
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Apologies, I uploaded an older version of the diagram as I have many copies. New Copies:
Also changed the roomstat terminals for ya.
As for running the neutral and earth from the boiler, I prefer to do it that way where possible so all the cables are together and I'm not borrowing neutrals from the wiring center. Also its always nice to have more cables than less when it comes to boilers. The price difference isn't that much.
Yeah, your right, I never even realised I had it going into L not SW. OppsSurly the valve orange goes to boiler switch live as all boilers I've worked with need permanent live and they don't need simplifying them
Heatings are the easiest thing to do if u have a basic understanding of electrics
I would change common and 1 around on the cyl stat and I think it's a really good drawing
My bad.
Don't forget John Ward has provided two methods for S plan (2 Port Valve) and Y Plan (3 port Valve).No not really mate, It just depends what boiler you have to connect up to the controls. For example some boilers will need just a switch line, neutral and earth. some boilers will need live, switch line, neutral and earth and some will need live, switch line, pump live, neutral and earth. If the boiler doesn't have pump live then the pump connects up with the oranges of the valves, if it does have a pump live connection then the pump connects to this in the boiler.
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