How to mend Riello 40 G2s

I Have a Riello Type 424t55 Burner, running on 28 second Kerosene?

how do you a set fuel jet ?

Oil not reaching burner?

My riello burner lights for about 12sec and then locks out?

Riello burner keeps tripping out?

My Riello 40 loses it prime ?

oil boiler fault?

how can i mend my riello burner rdb1 483t50?

how can I fix my oil fired riello boiler?

Riello 40 series burner stops ?

Riello 40 Burner problem?

Riello pump replacement?

Bleed a boiler?

Burner not working ?

riello 40 starts, runs fine then stops. ?

How do I bleed a Riello oil burner?

What is causing my Riello Mectron 3M Type 215 to emit fine black ash?

riello burner?

pressure adjustment to change from deisel to kerosene on riello burner?

Fan Cage Making noise on a Riello 40 FS?

Camray 5 'lockout'?

can you fix the pump on a riello40?

riello oil burner rdb?

bleeding with an allen key which way?

Riello RDB burner runs for about 45 minutes then reset comes on?

Riello RDB1 burner problem?

Riello burner needs reset to start?

Bleeding it after oil ran out?

After running out of oil, I thought I had an airlock in riello burner. ?

riello burner ?