Riello DB4 SE C03 A180 FS2 Installation, Use And Maintenance Instructions page 25

2.3 Burner components
2
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Key
1 Air box
2 Cover
3 Gas delivery regulator
4 Control box base for electrical connections
5 Boiler attachment flange
6 Combustion head
7 Gas servomotor
8 Air servomotor
9 Air pipe attachment flange
10 Flame inspection window
CHAPTER
1 5
17
13
9
3
8
7
2
6
10
12
11 QRI Photocell
12 Air pressure switch
13 Maximum gas pressure switch
14 Maximum oil pressure switch on return circuit
15 Pressure gauge nozzle return
16 Pressure gauge nozzle delivery
17 Gauge level (0-90) pressure speed gear
18 Ignition electrodes
19 Burner opening hinge
20 Atomisation nozzle-holder
Burner description
4
11
18
20
5