Riello DB 12 LSE C13 A0 FS1 FR Installation, Use And Maintenance Instructions page 27

2.3 Burner components
20051922
1 Electrical control box base for electrical connections
2 Air box
3 Cover
4 Maximum gas pressure switch
5 Oil pressure regulator
6 Gas train attachment flange
7 Photocell
8 Pilot burner
9 Tie-rod for combustion head modulation
10 Air servomotor
11 Air pipe attachment flange
12 Gas delivery regulator pilot burner
13 Air pressure switch
2
CHAPTER Burner description
14 Gas train pilot (burner)
15 Flame inspection window
16 Combustion head
17 Boiler attachment flange
18 Fuel servomotor
19 Burner lance
20 Lance pneumatic activation valve (5 bars min.)
21 Safety oil valve
22 Pressure gauge return
23 Minumum oil pressure switch on return
24 Pressure gauge delivery
25 Max oil pressure switch delivery
Fig. 2
5