Viessmann 200w Weather compensation - underfloor heatg ?

[Norcon]

nu heat are rubbish and by the sounds of it viessman are also.

 

[ALEC1]

its like comparing chalk and cheese...

with the viessmann stuff you can adapt the system to the building... that is what is so good...i have been doing viessman mixing valves for a longtime and they perform well

vaillant have a similar offering, as do worcester bosch...

whats the point in a ufh system that requires a flow temp of 70c...

 

[Norcon]

Why don't you cut the sales crap.
Can a demand be made to the boiler from a zone valve or not?

 

[ALEC1]

no.. i did say that earlier

 

[Norcon]

no.. i did say that earlier

Who would install such garbage?

 

[ALEC1]

what the zone valve?

 

[Norcon]

what the zone valve?

No the boiler silly.
You're telling me I cannot create a demand from a zone valve back to the viessmann boiler.
I'm telling you the boiler is GARBAGE.

 

[Kev F]

the boiler will take a switch live call

 

[Kev F]

oh your wc, buggered then, best thing for a conservatory is an air to air heat pump, cool in summer, toasty imn winter, can get diy ones that are very good, done a couple, plug and play units inc 3 pin plug, pick them up for £500

 

[Norcon]

inc 3 pin plug

And shall comply with bs (bull ****) 7671.

 

[Kev F]

tested and approved

 

[David937]

If the boiler has weather compensation and it is correctly set up, it will not need to be told via an external demand to supply heat - it will know when and how much.

How will it know? Just intrigued that's all.

 

[silverback]

If you are just adding underfloor to one small area I fail to see the need to have a all singing all dancing system, simply addd a Danfoss RTL valve (Return Temperature Limiter valve) simple, easy, cheap and it works well, I would say putting wood on top is not best, you would be better with stone to increase the heat output, wood would reduce the performance as it is an insulator

www.danfoss-randall.co.uk/PCMPDF/VD.UI.A1.12.pdf

 

[DeltaT2]

If you are just adding underfloor to one small area I fail to see the need to have a all singing all dancing system, simply addd a Danfoss RTL valve (Return Temperature Limiter valve) simple, easy, cheap and it works well, I would say putting wood on top is not best, you would be better with stone to increase the heat output, wood would reduce the performance as it is an insulator

www.danfoss-randall.co.uk/PCMPDF/VD.UI.A1.12.pdf[/QUOTE]

These are great, however be careful you get the one to suit your floor area.

Split ASHP are great for conservatories, cheap as chips & work like a dream.

 

[Norcon]

mysterytman wrote

If you use a Viessmann mixer

Lets say I want to use a different manufacturers mixer. eaton states a switched live call can be made back to energise the boiler.

Is it possible you can explain how this is done without resorting to sales spin?