I think I explained badly, hot water comes on in the morning at this time of year. and reached the set Temp 46C. That gives us two showers, we then leave for work. The Tank is normally at 18-20C at that point. Now if one shower is longer and the tank reaches 10C the boiler comes on ( like a frost setting).It shows as off on the Evo home screen but the BDR 91 box for the water is showing green. Can that Temp be altered ? As I say I think its like a frost setting but for the DHW.
Thanks,
FLY