Air / Fuel Adjustment; Oil Pump Outlet Pressure; Air Cam; Oil Cam - Riello DB 12 LM C10 Installation, Use And Maintenance Instructions

5.4

Air / fuel adjustment

During the operations for calibrating the air/fuel ratio for oil burn-
ers, the following adjustments need to be made.
5.4.1

Oil pump outlet pressure

Turn the screw 1)(Fig. 24) on the pump.
5.4.2

Air cam

Use the adjusters 2)(Fig. 25) after loosening the screws 3).
Key (Fig. 25)
1 Cam
2 Adjustment screws
3 Locking screws
4 Adjustable profile
5.4.3

Oil cam

Modify the eccentricity by turning the screw 3)(Fig. 26) after hav-
ing loosened the screws 2).
By tightening the screw 3) the eccentricity increases, thereby in-
creasing the difference between the maximum and minimum re-
turn pressure of the nozzle.
Key (Fig. 26)
1 Eccentric screw
2 Screws
3 Eccentricity adjustment screw
4 Nut and lock nut
5 Stop ring
6 Delivery pressure gauge
7 Return pressure gauge
Start-up, calibration and operation of the burner
Connection
pressure gauge
D1498
1 4
2
1
3
6
23 GB
1
2 3
D1499
5
4
20181098
Fig. 24
Fig. 25
7
Fig. 26
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