Unfortunately the only electrical connections in terms of control are through F connection (controlling CH and currently being initiated by BDR91) and the OpenTherm connection. I think that the...
Type: Posts; User: Tom Shea
Electrical Connections
Unfortunately the only electrical connections in terms of control are through F connection (controlling CH and currently being initiated by BDR91) and the OpenTherm connection. I think that the...
Vitodens 111-W DHW Control
Good afternoon all,
Apologies for going around the buoy again on an already discussed topic.
I have a Viessmann Vitodens 111-W boiler, Honeywell Evohome with BDR91 relay and HR91 TRVs. I work...