While you wait for answers, we may have found some information which could help you.
Click here for Start After Water PumpRiello oil pump shaft seal leaking?
Lost allen screw when bleeding boiler?
riello rd 3 boiler burner unit?
Riello mectron 3m oil burner leak?
my riello oil burner just makes abuzzing sound?
My riello boiler won't start after replacing the water pump?