This Alpha Fan Assembly 1.022592 is the device that introduces fresh air in to the combustion chamber,allowing the gas to be burnt correctly it also extracts the noxious gas after the combustion process is complete. The boiler has safety parameters in place to make sure no gas can be passed through to the main burner if the fan is not functioning correctly.
Alpha Fan Assembly 1.022592 is a Genuine Alpha Spare Part and is present in different range of Alpha boilers, including Alpha 240,Alpha 240Eco, Alpha 240P, Alpha 240X, Alpha 240XP, Alpha 280P.
Always refer to manufacturers instructions, and use genuine part.