Hi Any Viesmann engineers in here? I have a got a 111 installed and the CH keeps kicking in every half hour - I assume there is a pre-heating function and in comfort mode Looking at the manual I can put into eco mode by toggling the menu to eco mode and pressing on - simple said and done by when I toggle my menu I have no eco mode showing - just water / heating / pressure Any ideas of how I can turn on Eco mode?