Hi,
I have an Atag iC Economiser 27 boiler from 2017, not the more recent "plus" model. It came with an Atag One controller which is hooked in with a 2 wire OpenTherm bus connection.
The controller is about to pack in and I'm looking at Tado instead. The controller battery is on its last legs and a new one from Atag will be 90-odd quid!
In general, has anyone had any issues with OpenTherm compatibility with this boiler?
More specifically, I've been looking at Tado as a replacement. I've read that the only UK model that does OpenTherm is the wired thermostat. Is that really the case? Looks to me like the "Wireless Receiver" in the wireless kits have OpenTherm too.
Tado support said I'd need the "One BCU" module for this to work. I'm interested in the details of what that is and why it's needed, but I didn't want to bug a clearly busy Tado support person. Can anyone elaborate?
Atag themselves are touting Tado on their website, so clearly something works, maybe just not this model. Their support folk aren't too willing to discuss these kind of details with non-accredited installers. I'm keen to keep the 14 year guarantee alive, and tado is "blessed" by Atag.
Why won't the OpenTherm bus connection "just work", regardless of controller manufacturer?
Can I just use the basic on/off connector? Is modulation of the boiler via opentherm really that big a deal?
Thanks,
Dave
I have an Atag iC Economiser 27 boiler from 2017, not the more recent "plus" model. It came with an Atag One controller which is hooked in with a 2 wire OpenTherm bus connection.
The controller is about to pack in and I'm looking at Tado instead. The controller battery is on its last legs and a new one from Atag will be 90-odd quid!
In general, has anyone had any issues with OpenTherm compatibility with this boiler?
More specifically, I've been looking at Tado as a replacement. I've read that the only UK model that does OpenTherm is the wired thermostat. Is that really the case? Looks to me like the "Wireless Receiver" in the wireless kits have OpenTherm too.
Tado support said I'd need the "One BCU" module for this to work. I'm interested in the details of what that is and why it's needed, but I didn't want to bug a clearly busy Tado support person. Can anyone elaborate?
Atag themselves are touting Tado on their website, so clearly something works, maybe just not this model. Their support folk aren't too willing to discuss these kind of details with non-accredited installers. I'm keen to keep the 14 year guarantee alive, and tado is "blessed" by Atag.
Why won't the OpenTherm bus connection "just work", regardless of controller manufacturer?
Can I just use the basic on/off connector? Is modulation of the boiler via opentherm really that big a deal?
Thanks,
Dave