Vaillant eco-tec plus 615 tap water too hot

[tally100]

I have had a Vaillant eco-tec plus 615 and a mains pressure cylinder fitted and i have noticed the hot water from the tap is too hot and i don't want the children to scald themselves.The fitter when he showed me how to use the system said to turn the knob down with the tap sign on the front of the boiler i have done that but the water still seems too hot 50 degrees on lcd. Do i turn the hot water temp down using the cylinder stat which was on 60 degrees i've put it at 50 tonight,is this the right thing to do ? if not what setting should they be set to ?
Thanks

 

[gas4you]

Do I assume that you have a Vaillant unistor and VR65 control center fitted as well as the 615

Just read your post again. If you had a unistor then the hot water would be contolled via the top left knob on the boiler. If you don't then this can be left afully to the left as it will have no effect.

Set your hot water vis the cylinder stat. 60C is the norm if it has been fitted in the correct position. I would try it on 55C first and see how you get on.

What make of cylinder do you have?

 

[tally100]

Not a unistor its a Telford tempest stainless cylinder

 

[gas4you]

As my last reply, ignore water temp stat on boiler. Fitter does not know what he is talking about

If he did he would have installed the unistor and you would have had the most up to date efficient system that is available at present. The unistor 'talks' to the boiler and modulates it according to hot water needs

Did he use a flue gas analyser to set boiler up and range rate the heating side for your property

 

[tally100]

Thanks Dave
I will set cylinder stat to 55 degrees and go from there,We talked about a unistor but they said it was going to be more expensive and they usually fit the telford tempest so i went with there recommendations as i did not know the difference.If they had not been highly recomended i would have gone to another firm but its a lottery if people are not reccomended.

Did he use a flue gas analyser to set boiler up and range rate the heating side for your property

sorry i don't know as i had to go to work the day its was commissioned can i tell if its been fitted right from the screen?

Thanks

 

[gas4you]

I don't know why everybody seems to reckon that the unistor is so expensive. Admittedly it is marketed against the megaflo and as such comes with a 2/25 year warranty, but I find them very competively priced, although I must admit i am privy to more discounts than most

As for your boiler, when it is running press i & + together and this should display D0, then press i again and it will tell you what Kw output it is set to.

What size property do you live in?

 

[tally100]

Its an extended 4 bed detached 10 years old so new construction methods
Cheers

 

[gas4you]

Then chances are that you will need this set on max at 15Kw, so don't worry about the range rating. in fact I would wonder if it is powerful enough for your property and hot water needs. maybe just enough