T i m posted
On Sat, 28 Dec 2019 17:16:46 +0000, The Marquis Saint Evremonde
wrote:

We had one installed a few months ago and it is bloody awful.
The software appears to be rigged to make the thing heat the place up as
slowly as possible, and no amount of fiddling with the settings will
remedy it.

Assuming it's on full,

It's never on full. A few seconds after it ignites after a new call for
heat, the burner output drops to minimum or near-minimum, and stays
there for at least half an hour, sometimes more. The flow water
temperature hangs around at 35-40 all this time, so the rads never get
properly hot.

should it just stay like that till close to the
target temperature?

It doesn't know what the target *room* temperature is, only whether it's
calling for heat or not. It never gets anywhere near the target *flow*
temperture, which I have set at 65degC.

Or do they do this thing where they 'learn' and
say actually turn on later because they know they can be up to temp in
time (even if that can't in reality)? [1]


Mind you this probably doesn't affect the OP as he only needs a small
combi, but it does affect me.

It might if there is any crossover on the software across models?

Unlikely, I think; if a combi did what ours does it would be completely
unmarketable.

--
Evremonde