Search found 2 matches
- Sun Sep 23, 2018 5:51 am
- Forum: OpenTherm Setup & Help
- Topic: Evohome + Opentherm + Viessmann Vitodens 100
- Replies: 95
- Views: 6086
Re: Evohome + Opentherm + Viessmann Vitodens 100
The evohome with the R8810A OpenTherm bridge will connect directly to the appropriate terminals on 050 and 100 series boilers without the need for any interface box. The box in the attached link is for controls that provide 0-10v input, which is not Opentherm.
- Tue Jul 04, 2017 11:55 am
- Forum: OpenTherm Setup & Help
- Topic: Open Therm
- Replies: 8
- Views: 713
Re: Open Therm
I assume you have the OpenTherm bridge connected to terminals 20 & 21? On the boiler did you set Option 60 to 02 for OpenTherm? It comes factory set at 03.