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    Vaillant EcoMax 835 DHW

    Sorry for the late reply, just got back from the Christmas visiting etc. With the DHW knob wound right up the display shows 71 degrees. The actual temperature of the water is not 71 (still haven't got a thermometer so not sure what it actually is yet). When I wind the knob back you can feel...
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    Vaillant EcoMax 835 DHW

    Its burning 28kw at the 10l/min flow rate. The boiler setting via the diagnostic code is set a 27kw which is the maximum for the boiler. I guess allowing for the inaccuaracy of a mechanical gas meter against a boiler it is fairly accurate don't you think ? Sorry can't tell what the...
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    Vaillant EcoMax 835 DHW

    Looks like I need a better thermometer to measure the temperature. The wife's fancy digital medical thing just died on me. To measure the gas flow do you mean read the gas meter as the boiler is running ? Ta
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    Vaillant EcoMax 835 DHW

    Thanks for the quick reply. With the tap at full bore I'm getting about 10l/min. Flow in at 71 degrees flow out at 57 degrees That's with the temp stat turned right up to max. Sorry about before (HTC meant NTC). Is the NTC working correctly then ? Thanks Neil
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    Vaillant EcoMax 835 DHW

    Hi new to this site but need some help. I have an Ecomax 835 installed for many years and I have noticed today that the DHW seems to cooler than normal. Went and checked the boiler and with the DHW thermostatic dial set in the mid point the boiler kicks in o.k when the tap is run. Thought...
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