How to Confirm Tado Settings on Remeha Avanta Ace

VectorOfChange

Hello,

I have searched for the answer to my question but was unable to find it on the web or the forum. Apologies if it's already been answered and I couldn't find it.

I have an Avanta Ace 28C connected to Tado v3+ Wireless system. This is an OpenTherm connection.

How can I confirm/verify the settings that Tado is sending to the boiler?

I have attempted to use the control panel on the boiler (and the boiler's instruction manual) to verify settings are being changed but the settings reported on the basic readout and the advanced menu never change.

I should note the basic icons (flame on/off, room heating demand on/off, hot water demand on/off) all work, and the system appears to work as designed most of the time.

Due to the information obscuring in the Tado app, I can clearly see that Tado is calling for heat and the radiator is hot. However, any more granular information is obscured (though collected and stored, because Tado support can access this information…).

For example, if I change the hot water pre-heat temperature, how can I verify the boiler has actually received and accepted the OpenTherm command from Tado? The pre-heat temperature setting inside the advanced menu on the boiler control panel doesn't change.

Same with calling for radiator heat…is there a way to verify the target temperature the boiler is currently heating to (that Tado has called for)?

I'm interested in smart home stuff, so I'm willing to install an OTGateway to monitor the OpenTherm commands (and inject validation commands if needed), or build a cable and tap into the diagnostics port of the boiler.

But I'm hoping I just missed something simple and there's a way to validate the currently active settings from the control panel of the boiler.

This also would be helpful in troubleshooting an occasional issue I have where the boiler stays on even though Tado app says there's no call for heat (and therefore the boiler should be off).

Thanks

Rob

@policywonk I have no idea what a specific boiler will display. However, you can check certain settings in the tado app. You can select the DHW temperature in the schedule for DHW. What's in the schedule is what we ask for.

For the flow temperature to the radiators (/UFH), there is the Flow Temperature Optimization setting. However, when modulating, so with a moderate heat request, we tend to ask for a lower temperature than the maximum selected value. This live temperature value is not visible in the app and I don't know if it can be found elsewhere. In theory we do have it buried somewhere, but I don't know if the API can access it. If it can be deducted by an OTGateway is something I do not know but maybe worth a try.

policywonk

@Rob is this another one for you? It seems to need a backend verification of Opentherm control signals being exchanged.

policywonk

Well thats a hell of a lot more than I know!

VectorOfChange

@Rob Thank you for the information! I'll see if I can figure it out from the API, and I'll probably install the OTGateway anyway.

@policywonk Thank you for getting Rob's attention on this! :D

policywonk

Well keep us updated because others will benefit.

Have only just realised how serious the proprietry nature of boiler protocols had become; the fact tht the Dutch dared to force Opentherm as a legislated communications standard, is a step in the right direction.

I get that Tado managed to cover some protocol revisions and that it isnt always ideal, but it seems right that this forum presents findings about what can be done, rather than so many homes being stuck in limbo as vendors stand off against each other, for reasons which may be assumed but arent clear.