Riello DB 16 SM C01 TC A0 FS1 T250 Installation, Use And Maintenance Instructions page 25

2.3 Burner components
20069960
Key
1 Control box base for electrical connections
2 Air box
3 Cover
4 Maximum gas pressure switch
5 Gas delivery regulator
6 Gas train attachment flange
7 Photocell QRA
8 Pilot burner gas train
2
CHAPTER
9 Gas adjuster adjustment cam
10 Servomotor with air adjustment cam
11 Adjusting the combustion head
12 Air pipe attachment flange
13 Air pressure switch
14 Flame inspection window
15 Combustion head
16 Boiler attachment flange
17 Ignition pilot burner
Burner description
Fig. 2
5