Discuss Comfort DHW on Vaillant ecotec-plus 831 in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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stratobuddy

I have this boiler with a 470f controller.

The DHW temp is set by the user on the boiler control panel. I have mine set to 55 at the moment.

There is also the option for the user to turn on so-called COMFORT mode which fires up the boiler from time to time to pre-heat the plate heater so it always contains a small supply of hot water to get "instant" DHW (once it gets to the tap, of course).

I often turn mine on, say for doing washing up so that things can be rinsed in a slow flow of hot water, which would otherwise be too slow to fire up the boiler for HW.

HOWEVER - - here is my question, although HW temp is set to 55, the water in the plate heater only gets up to exactly 45 (every time) and then the boiler turns off. It seems to me that there may be a separate setting for the "comfort mode" HW temp, but I can't find it anywhere.

Any ideas?
 
As my mum used to say to me.. " for the love of god stop fiddling and get out and enjoy the sunshine!"
 
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