I need a circuit diagram of the Ferroli PCB?

I have investigated the boiler in my son's new home which is a Ferroli Modena 102. It would appear that the installer (not known) put 230V across the themostat input (72) and burned the board MF03F. Either I figure out what is damaged on the board and fix it or find another way of controlling the DHW. Curiously it appears that the fault he caused means the DHW is on, so they control the system by turning the DHW knob up and down! So if you can point me to where I can get a circuit diagram, I'd be most grateful.