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Looks like a s plan with no bypass below boiler.

d2 safety relief in overflow pipe... Not to regulations. That would just melt if it discharged.

I would guess the boiler is not wired correctly, more likely an installer fault than a new vaillant boiler playing up already!? Don't be surprised if vaillant charge you for the call out!
 
Something not quite right? 37kw ? Is your cylinder 2100L? Who sized boiler you or installer? I'm sure if I was doing Job on a price you would have and 18kw or 24kw maximum! Think partial load could be set to 8kw on boiler but that's probably not the issue. Ask original installer to come back, then employ a competent and qualified installer? What was the company called who did the job for you?
 
Sorry I didn't realise there was a competition for most posts! What's the prize? Did read the whole tread, what I had intended to write was edited out almost entirely as I didn't want to seem rude and what was left was the rest. Who was / is walks with a limp. I shall endeavour not to post unless entirely unavoidable and no one has used any of the words or letters in a similar combination.
Suppose you would like a forum where automatic responses and one liners answer every question.... Not really a forum any more? Apologies if this matter was ever included in a previous post !
 
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Sorry I didn't realise there was a competition for most posts! What's the prize? Did read the whole tread, what I had intended to write was edited out almost entirely as I didn't want to seem rude and what was left was the rest. Who was / is walks with a limp. I shall endeavour not to post unless entirely unavoidable and no one has used any of the words or letters in a similar combination.
Suppose you would like a forum where automatic responses and one liners answer every question.... Not really a forum any more? Apologies if this matter was ever included in a previous post !
No, just seem a bit of a waste to repeat info to OP, I say it just seams a bit of a waste of time to keep repeating yourself, that is all. :cheesy:
 
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Can we get back to topic please. In my opinion, Something not quite right? 37kw ? Is your cylinder 2100L? Who sized boiler you or installer? I'm sure if I was doing Job on a price you would have and 18kw or 24kw maximum! Think partial load could be set to 8kw on boiler but that's probably not the issue. Ask original installer to come back, then employ a competent and qualified installer? What was the company called who did the job for you?
 
Looks like a s plan with no bypass below boiler.

d2 safety relief in overflow pipe... Not to regulations. That would just melt if it discharged.

I would guess the boiler is not wired correctly, more likely an installer fault than a new vaillant boiler playing up already!? Don't be surprised if vaillant charge you for the call out!

Thanks for all your responses it has been helpful, today had the engineer from vaillant to look at the issue, turns out the boiler is not wired properly, the timer is just opening the values as per the setting and not receiving/sending any signals to boiler to turn off or on. The boiler is always in demand mode hence starting every 20 mins once the temperature goes below the flow temperature set.

He also pointed out to replace the D2 safety relief pipe in plastic and check if the cylinder has internal expansion vessel for sure.
I read the manual for excelsior it says it has an internal expansion by providing a volume of air above the water level inside the cylinder and has an Air Gap Device that recharges the air gap when water is drawn this all sounds good but how can check if the fitter has fitted it properly?

The fitter is returning tomorrow to correct the issues, hope he does else would ask you guys again to suggest a plumber / installer to correct the issue.

Regards,
Santhosh
 
easy repair then on the wiring just boiler need SWL back from wiring centre ....
air bubble if isnt there you will be seen water dripping from discharge pipe
 

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