A couple of months back I upgraded my old Potterton Prima 80F to a
Vaillant Ecotec 428 boiler.....and very impressed I have been too.

Being a bit of a data anorak I am very curious about the VRDialog
software that Vaillant offer, for logging and diagnostics. readily
available for about £70.

http://www.vaillant.co.uk/installers...s/diagnostics/

I would be really interested to log all the key boiler paramaters such
as on/off times; temperatures; modulation %age etc over a few days.

I can't find any meaningful documentation to download anywhere.

Does anyone out there actually use this? What do you think of it? Is
it worth the dosh?

D