I have found that its software has also been improved in another respect. I noted in the post here that the anti-Legionella programme (which was supposed to heat the hot water cylinder to 70C) did not work correctly, with heavy microfiring apparent. This has changed, with the behaviour now looking like this:
It's not perhaps perfect, but it's certainly a vast improvement. Now the target flow temperature used is 70C (rather than about 84C), and more importantly there is no microfiring because the boiler stops trying to heat the cylinder when it reaches a temperature above about 65C. So I shall be content to use this programme, whereas I certainly wasn't before.
