Vaillant Eco Tec Plus 637 and Unistor query

[uncleg]

Hi,

I inherited this sytems after moving which is fairly new but had no one exaplin how it works. I have a room thermno in the hall and trv on most rads.

I have worked this out now but have one query. On the eco tec the HW dial is redundant as water is heated in the UNIstor set at 60c. The CH dial on the eco tec is bascially for how hot you want the rads and it is dependant upon seasons, so higher when in winter etc....

my question is that when it was cold recently I increased this, but it also increased how hot the water was when I was showering - is this an issue/has this been set up wrong?

Please can someone assist.

Thanks

 

[stevetheplumber]

Hi,

I inherited this sytems after moving which is fairly new but had no one exaplin how it works. I have a room thermno in the hall and trv on most rads.

I have worked this out now but have one query. On the eco tec the HW dial is redundant as water is heated in the UNIstor set at 60c. The CH dial on the eco tec is bascially for how hot you want the rads and it is dependant upon seasons, so higher when in winter etc....

my question is that when it was cold recently I increased this, but it also increased how hot the water was when I was showering - is this an issue/has this been set up wrong?

Please can someone assist.

Thanks

imnot sure what a unistor is but whatever system the water shoiuld have seperate temperature control
one thing i did think of was if your boiler was set below 60 then the hot water possibly wasnt reaching 6o to start with and upping the boiler temp wouyld then raise the water temp

 

[uncleg]

Thanks

Unistor is like megaflow. Its a hw cylinder in the garage which I have set to 60c

I thought cold water from the mains goes into here and water heats up in here and
Then is sent to the taps etc, so the temp on the boiler for the rads should
Have no effect, unless I am missing something??

Thanks

 

[oldplumber]

check the cyl stat is operating correctly

 

[Plucky]

Vaillant have options on there boilers to control the temp of the Hot Water in the cylinder via low voltage controls. Nothing wrong with the way yours is set up though

 

[Blackcatgas]

......................

 

[uncleg]

thank all for your replies.

Last night I turned the rad temp dial on the bolier down but kept the temp on the cyclinder to 60c as I have always done.

The water as expected was not at hot as normal, I can not understand why changing the temp on the boiler for the radiators is changing the temp of the hot water. The bolier does have a temparature dial for HW, but this is kept at approx 9oclock and has not been touched for a while?

Very confused!😕 When i turn the dial on the cylinder, bit like a room thermo it clicks at approx 45/50c even though I have it as 60c. I thought that cold water enters here and is heated to whatever the temp is set at? so it does not matter about the temp of the water from the boiler?

Help appreciated as always!