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I'm pretty sure this is the option the installer went for

Here is a discussion on pre-heat and eco mode when using Opentherm: https://community.tado.com/en-gb/discussion/comment/56757

Here are details on the weather side of things with Tado, as there is no physical device its just internet forecast based, but also I'm not sure how much its factored in given that its set to Opentherm with the set schedule...

I bought a EU kit, and just use wireless thermostats, nothing wired. https://uk.shop.tado.com/products/wireless-smart-thermostat-starter-kit-v3-eu-version I'm fairly sure the Opentherm setup means the weather compensation is handled by Tado, as the Viessmann option is a different commissioning...

Really good thanks. Its been a very reliable combination. I was worried about the lack of manual access to easily override once OpenThermwas configured, but its not been an issue. Between the Tado and ViCare app, they do a good job. I had a bit of an issue when internet access went down, but the...

We've got a flat roof on top of our apartment block that is approx 30 years old, and are looking for general advice on maintaining it, as we are concerned about the discoloration. Some basic questions we have are: - What is the roofing material? Zinc? Tin? Lead? Something else? - Is the...

Yes, its a Viessmann Vitodens 100-W B1KF

Yes, the installers set C.7 operating mode to 14. Viessman have also said (to change it from Opentherm to manual): In terms of the eco/comfort mode for the DHW, it looks like the option is disabled when in Opentherm mode: https://community.tado.com/en-gb/discussion/comment/42279/#Comment_42279

Ok, so Viessmann have said: "The change from Opentherm to manual has to be done from the Commissioning screen, option C7:14 to C7:1 then go to last setting in list until END shows then confirm with OK. The Commissioning Screen is where the Installer set up the Boiler functions, this is in the...

@martygturner Thats what I'd like to do, but I cant see how to do it without re-commissioning From the User Manual From the Installation Manual (I dont really fancy mucking about with the gas shut-off valve or the 'trap') In terms of flipping back to OpenTherm, I see their app details...

Thats really what I want to be able to do, and am struggling with it - so I shouldn't need to change the operating mode to be able to do that? When I scroll through the P options here: The only ones that appear as I scroll through are P2, P5, P6, P7, P8, P9, P10, P11 I cant access P4 which...

I think its the fact that I've jumped from a 30 year old boiler and immersion heater where a few kicks one way or the other would always get something working, whereas now if Tado anticipates that in 45 mins the outside temp is going to drop by 1 degree it'll pre-empt it and reheat the one...

When I say SRV I mean these (https://www.tado.com/gb-en/smart-radiator-thermostat-add-on) when they turn on because the paired wireless temp sensor tells them to, the boiler currently fires up. I've got no idea how to do this "why not just link out the switched connection in the boiler control...

Argh - sorry, I meant immersion heater.

Before I had my new combi boiler and Tado installed I had an older system with a separate water tank. If that old boiler ever had issues I could simply use the immersion heater in the water tank and still have hot water. Now that my new combi boiler has Tado connected, as far as I can see I...

Viessmann have said: "The pump will run on after a water demand for 3 minutes, and after a heating demand for a minute . Occasionally if there has been no operation the boiler may do a system check also " So I'm thinking its these 'system checks' that I hear at odd times.

When you say Zone valves - is that like the Tado SRVs? I have these: https://www.tado.com/gb-en/smart-radiator-thermostat-overview Last night it went on at 23:50 for about 3 mins. No radiator called for heat nor was any tap used in the previous hour.

Thanks, maybe thats it. I'll see if I get a reply from Viessmann.

Thanks, that could be it I suppose, but I'm pretty sure the 'pre-heat' function isnt live as its in Eco mode.

Its a Viessmann 100-W B1KF 35kw combi.