Burner Description - Riello RL 190/M Installation, Use And Maintenance Instructions

4.10

Burner description

1 Ignition electrodes
2 Combustion head
3 Screw for combustion head adjustment
4 Screw for fixing fan to flange
5 Oil pressure switch
6 Nozzle return pressure gauge
7 Nozzle delivery pressure gauge
8 Pump
9 Nozzle holder
10 Air dampers
11 Safety solenoid valves
12 Fan pressure test point
13 Boiler fixing flange
14 Flame stability disc
15 Slide bars for opening the burner and inspecting the
combustion head
16 Extensions for slide bars 15)
17 Electrical motor
18 Electrical control box with lockout pilot light and reset button
19 Flame inspection window
20 Valve unit with nozzle return line pressure variator
21 Servomotor, controls the fuel flow rate variator and the air
damper.
When the burner is not operating the air damper is fully
closed in order to reduce heat dispersion from the boiler due
to the flue draught, which draws air from the fan suction
inlet.
Two types of burner lockout may occur:
Control box lockout: if the control box 18)(Fig. 5) push-button
lights up, it indicates that the burner is in lockout.
Press the push-button to reset.
Motor lockout: release by pressing the button on thermal relay.
20166451
Technical description of the burner
12 GB
7 6 5
8
17 16 15
19 20
18
4 3 2 1
13 9
11
10
21
12
14
20170887
Fig. 5