Has anyone wired their Thermostat to utilise the modulation feature on an Alpha Boiler? Alpha isn’t listed for a Bus code in the Tado instructions, I’ve used the contact us feature to Tado but so far no news.
I do not know any more details than the website for the Alpha boilers. They do advertise compatibly with OpenTherm so you should be fine to use that for modulation control. As I live in the Netherlands and all boilers have OpenTherm I was able to use the D01 configuration code with a "2-wire bus" wired connection to my boiler and it works much better than the "potential free contact" thermostat that I replaced. Good luck
They came back to me yesterday to say Alpha doesn’t support modulation with Tado which is really annoying given the reason I chose Tado over Hive was the modulation facility.