We may have found other answers which could help you.
Click here for Ferroli Central Working Water
How turn off heating in Ferolli Optimax 31c?
Ferolli Optimax HE 31C expansion vessel change?
F40 fault?
Replace a diverter valve?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
Hi how to increase the water pressure on ferroli optimax 25C?