I don’t have an outdoor sensor, but would be interested to hear if it will work with OT!
Atag IS24 Plus Evohome Plus Opentherm
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Originally posted by RussC View PostThanks for the info. Could you tell me more about the part you mentioned please? I assumes there would be screw terminal blocks on the boiler side, but it sounds like this this is not the case?
Thanks
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Originally posted by fergie View PostI don’t have an outdoor sensor, but would be interested to hear if it will work with OT!
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In a perfect world the sensor would tell the boiler to work harder or work less depending on the temp outside. But that then may start working against evohome. Even better would be if evohome could use the local weather to adjust its demands.
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Originally posted by fergie View PostIn a perfect world the sensor would tell the boiler to work harder or work less depending on the temp outside. But that then may start working against evohome. Even better would be if evohome could use the local weather to adjust its demands.
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Thought I'd give it a few days before reporting back. New economiser 27 went in on Thursday, and so far so good. Just works perfectly with evohome, after a day or two characterising they're working together brilliantly, every zone accurately regulated and minimal overshoot. Tonight it's dropped to -11C outside and it's just transparent to the user, no adjusting temperature set points... Brilliant!
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I have just had an Atag IC 35 installed. I spoke with their technical team about wiring OT thermostat and they said I could use the black adapter that comes in the unit as it will fit on the blue connection point in the boiler. I had to knock off a small plastic tag but this works and my OT thermostat is up and running and commincating with the Evohome controller. Thought this might be useful for people who might be trying to order the blue adaptor.
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Sorry for reviving an ancient thread! @HenGus, almost three years down the track, are you happy you went with OpenTherm on the ATAG? I'm about to get an iS 24 installed, and having the option to get OpenTherm but wondering if it's worth the added complexity (needing the OpenTherm bridge, the different valve and the labour will probably add £300-400 to the bill). Thanks!
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Originally posted by rotor View PostSorry for reviving an ancient thread! @HenGus, almost three years down the track, are you happy you went with OpenTherm on the ATAG? I'm about to get an iS 24 installed, and having the option to get OpenTherm but wondering if it's worth the added complexity (needing the OpenTherm bridge, the different valve and the labour will probably add £300-400 to the bill). Thanks!
Would I bother to install OT again? Yes, I probably would. In truth, the only bits of Evohome that gave me any issues after OT was installed was the CS92A and the occasional loss of comms from a HR92. Building from scratch, I would probably not install the hot water control.
I haven't bothered with Evohome in my new home as I would not like to leave my wife with a system that she doesn't understand with little help available from installers and family.
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