Vaillant combi 835 vr 720 vr 921 add a heating zone and unvented cylinder advice

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1 Jan 2009
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Hi all

I am toying with the idea of having my dumb stat replaced with a vr92 for upstairs so that I can control it via the app.

I have a vr66/2 which was bought a while ago as I was close to pulling the trigger on going
Unvented.

I also have UFH controlled by same dumb heatmiser stat.

I’m wondering can I replace upstairs stat with a vr 92 and the vr66 would control the valve ? Would this become zone 2 heating ?

And later could I do similarly with the UFH stat so replace that with a vr92 and this would become zone 3?

Finally I would like to go unvented at some point for the extra performance and use excess solar to heat the tank up I would be unable to use a unistor as I need a horizontal tank again in prep I bought a vr10 to use on the cylinder for the NTC.

Any thoughts suggestions greatly appreciated

Current setup
Combi 835
Sensocomfort controller
Sensonet gateway

Already bought for expansion vr 66/2 and vr 10 temp sensor

Cheers
 

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