ecoTEC Pro, Plus before 2012
Two temperature dials and four round buttons.
ecoTEC Pro, Plus from 2012
Four rectangular buttons and no dials.
ecoTEC Plus (current)
Black display with a silver panel underneath.
ecoFIT Pure / Sustain
Small screen with +/− buttons and a round reset. No big dials.
ecoTEC Exclusive
Display on the left, round controller in the middle, on/off on the right.
Match the picture to the boiler in front of you. Combi, system and regular versions of the same fascia usually share the same buttons. kW size does not change how you set the flow.
When the flow is set, go back to the Boiler Optimiser to log what it was and what you set.