Vaillant 831 ecotec plus

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Two questions for anyone that knows, whats the minimum and maximum watts this boiler will cope with on the central heating side as i plan on upgrading four of the seven radiators from singles to doubles and want to know what i have to play with, i know it has 24kw but how much of this can i use roughly?

Also what is the best wireless programmable room stat for this boiler? and could i fit this myself? any help much appreciated!
 
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831 has a max 24kw output to central heating. btu equivalent is 80,000.

will easily cope with seven rads whatever size they are.
 
A

ALEC1

7 rads is only about 10kws...vaillants own controls are the best bet..either the 470f or 350f
 
P

Phill Peck

8/9 - 24

Can't remember if its 8 or 9 minimum

Also not sure if this has changed on the 2nd generation ecotecs?
 
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Ok well I'm getting some really big radiators one in kitchen is 2.4m x 450mm single which I'm changing to a 500mm double as the kitchen just never gets warm enough, and doing same in bedrooms an hall. I have it set to 70c which I think is normal for this boiler? Thanks for the info I think it's will easily cope with the extra an should warm the house a lot faster once done!
 
A

ALEC1

normal for this boiler is compensation controls, and the outdoor sensor, as these are mandatory in Germany...


Rapid heat up times are inherently in efficient especially with on-off controls, so best avoided... installing the vr470 is the way to go...
 
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The 470f only works with the brand new 2012 831 so I ordered the 350f as this just plugs straight in so happy days its more expensive than the Honeywell controllers but no plumber needed 👍 and just a stelrad radiator as heard these are lighter an more efficient than the kudox screwfix sell, maybe a job for Xmas day when the relatives are boring me......
 
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Pete1976,

Just a small correction in case users are searching forums.

The 470F does work on older 831's. I have just put one on mine (installed in March 2010) to replace an honeywell unit that caused short cycling. Works just fine :D, but you do need a degree in reading the installation manual and user guide!
 

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