Wiring an S-Plan onto a Combi

[Dan-HybridHeat]

I've just had to condemn an old 145L Andrews unvented water heater in a hair salon, and I am going back to fit an indirect unvented cylinder. They have a Worcester 230 combi in there at the minute which runs the heating and hot water for the kitchen sink.

I'm planning on leaving the kitchen sink running from the combi, and running the rest of the hot water from the new cylinder. Obviously there will be the 2 2-port valves controlled by a twin channel programmer, but I'm wondering how I wire the boiler seeing as it's a combi? I'm assuming it's similar to wiring it as normal to a system boiler, but not sure if the boiler will have the correct terminals to allow me to do it. The boiler MI's don't have great wiring diagrams so any help would be much appreciated!

 

[jtsplumbing]

Not 100% sure but think you take switch live from timer to X4 terminal block, connection No 2 but check with Worcester first,

 

[Dan-HybridHeat]

Will give them a bell and check that, at least I've got somewhere to start now. It's actually out in Crapstone pretty close to you

 

[ShaunCorbs]

here you go mate



and on the 230 think its

pin 1 is live sent
pin 2 live return (heat call)

any questions please ask

 

[Dan-HybridHeat]

So if I take the SL from the oranges into pin 2, and the HW ON demand from the programmer into pin 1 that should do it?

I've only wired a few S-plans before but from scratch they're easy with the diagram

 

[ShaunCorbs]

So if I take the SL from the oranges into pin 2, and the HW ON demand from the programmer into pin 1 that should do it?

I've only wired a few S-plans before but from scratch they're easy with the diagram

you will need to zone the heating as well unless there ok with heating on in the summer

Dont forget your auto bypass as well

and did one for your boiler

 

[Dan-HybridHeat]

Thanks for that mate appreciate it. Last thing, will I need to leave the link in between pin 1 and 2 or remove it?

 

[ShaunCorbs]

Thanks for that mate appreciate it. Last thing, will I need to leave the link in between pin 1 and 2 or remove it?

It should be removed unless they don't have a room stat but needs to be removed

 

[Dan-HybridHeat]

No room stat at the minute so is in there. Cheers for all that

 

[ShaunCorbs]

No room stat at the minute so is in there. Cheers for all that

Not a problem

 

[Dan-HybridHeat]

Working like a dream, thanks again Shaun

 

[ShaunCorbs]

Working like a dream, thanks again Shaun

thats good, install went well i guess 🙂