Have you tried balancing the system?
No not fully yet, I have the same settings as those on the previous boiler, all the the rads are getting hot except one, which is not an issue as there are 3 x 1600 watt radiators in the room.
ABV on 0.5
Not tried that setting, I guess I would be worried that it would not open at that setting.
You say the pump is using 40W with a 4.4m head. Was that when you measured the temperatures?
That's what was displayed on the pump, and that was the display settings when the temperatures were recorded.
These were the results from this morning:
1 min - 38 - 20
6min - 48 -30
11 min - 57 - 39
14 min - 58 - 40
16 min 60 - 42
18 min 60 - 44 - Modulating
22 min 60 - 47
40 min 60 - 48[/quote]