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It also includes details of the installation of vitotrol 200 and 300 with a vitotronic; not much but some..did you have a look at the link??

Here - http://www.viessmann.ca/etc/medialib/internet-ca/pdfs/controls.Par.44220.File.File.tmp/Vitotronic_200_TDM.pdf is a canadian manual for the whole setup including the vitotrol200 and here -...

As someone who 'butted in' to this thread and posted another (without success) I have had time to look through the French Viessmann site and my manuals, in French. The purpose of the 'pumping out of hours' according to the French manuals is to avoid the pump blocking. I was away one year for...

I am so sorry, you are correct. I am even more confused than I thought!! The original thread was called Viessmann Vitotrol 150!! Any ideas anyone?? Thanks, Barry

There is a thread on this already and I added this entry but got no responses. Maybe the old thread is not being followed?? Here is my input and question.... Its amazing, this thread, and I hope I am not too late in 'getting in' is almost precisely what has happened to me. Its a little...

Its amazing, this thread, and I hope I am not too late in 'getting in' is almost precisely what has happened to me. Its a little frustrating that there isn't any 'answer' in the thread, but never mind. I have the same controller, in France. I have no external management, i.e. no thermostat...