Riello DB3 SM C03 Installation, Use And Maintenance Instructions page 36

2.3 Burner components
2
11
4
9
9
4
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1 Air box
2 Cover
3 Servomotor
4 Control box base for electrical connections
5 Boiler attachment flange
6 Combustion head
7 Gas pressure test point on combustion head
8 Ignition electrodes/pilot
9 Air pipe attachment flange
10 Flame inspection window
6
16
20
7
5
14
18
1
13
5
1 16 7
20
13 18
14
CHAPTER
15
6
3
8
19
17
17
6
15
10
3
11 Flame sensor
12 Air pressure switch
13 Maximum gas pressure switch with pressure test point
14 Gas connection flange
15 Shutter
16 Lever for moving combustion head
17 Air damper command lever
18 Gas butterfly valve command lever
19 Variable profile cam
20 Pressure test point on combustion head
2
Burner description
2
19
10
12
12
11
Fig. 3