We may have found other answers which could help you.
Click here for Instructions Hot WaterReplace a diverter valve?
Parts for ferroli optimax he 31c ?
How can i repair a noCN fault on my boiler?
Ferroli DOMIcompact F 30 D?
Ferroli Optimax HE31c a26 problem?
Connections on Ferroli F24 Gas Valve?