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Adam !!!!
Discuss Vaillant Eco Tec Plus 637 - issues in the Plumbing Jobs | The Job-board area at PlumbersForums.net
See, I was right, for some reasons, these people just get off on posting points score!!!!Haha I'm all about the post count!
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!
When u say starts and shuts off. Does it power off? Does the burner shut down ? Does the pump stop? Sounds like possibly flow reaching temp and boiler just modulating down? Possibly partial load too high?
or boiler is too big for your house
i am more of a 18kw if not 15kw tbhRecovery time 3ms! Boiler well over sized. U needed 837 combi or perhaps a better solution would have been 24kw system boiler.
before ordering this model I checked on vaillant site with my requirement and it suggested this model and also the fitter and builder had suggested this
"ditto" LOLThank you Zebedy for re-enforcing the points made earlier in this thread.
before ordering this model I checked on vaillant site with my requirement and it suggested this model and also the fitter and builder had suggested this
"ditto" LOL
Good shout Phil. Overlooked that one as it is mentioned somewhere (can't be bothered reading through it all) that vaillant came outÂż
Btw i wonder why have they made the new links a bit bare silver wire you can (well i can't) hardly see instead of a nice bit bright red? Maybe to reap some call out cash??
Me think :
if the link was in the Vaillant engineer would have seen it !?
Doesn't look like the vallient engineer has resolved the prob from the last post it still sounds like the boiler is constantly on to me that can only point to the live link being left in
Is the programmer opening and closing the zone valves ?
I think the problem is that the installer has left the 24v rs link in the boiler
This needs to be taken out when using external controls hense why the boiler is on constantly on
the reason it keeps going on and off all the time is that the boiler is just pumping round a small circuit when the zone valves are shut then when it reaches 75 degrees will turn off eventually the boiler will overheat and u will have to keep re setting it
When the zone valves are open ie when on at the proggramer the boiler will work fine
Should be a simple fix really hope I explained this ok
who knows Phil we need a picture to be 100% sure
View attachment 15096
I can see the 24v pin is removed, is that what you guys were referring ?
Thanks,
Reply to Vaillant Eco Tec Plus 637 - issues in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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