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- Sat Dec 10, 2022 5:12 pm
- Forum: OpenTherm Setup & Help
- Topic: Viessmann vitodens 111-w and Opentherm
- Replies: 1
- Views: 369
Viessmann vitodens 111-w and Opentherm
Hi all, I had a viessmann vitodens 111-w boiler installed earlier in the year. I've got a BDR91 linked to the boiler. It's only in this recent cold weather that the radiators have started coming on again. I've noticed that despite none of the radiators calling for heat that the boiler will be ...