Servomotor Adjustment (Sqm 40); Air / Fuel Adjustment - Riello DB 6 LSM C13 Installation, Use And Maintenance Instructions

5.4

Servomotor adjustment (SQM 40)

The servomotor (Fig. 33) adjusts at the same time through re-
turns, air flow and pressure of the fuel in use.
Completes a rotation of 90° in 30 s. After the adjustment made in
the factory to its 6 cams to allow an initial ignition.
Check that they are as shown below.
In the event of a modification, follow what is described below for
each cam:
Cam I (RED): 135° (The same for all models)
Limits the rotation towards the maximum.
Do not make any adjustments.
WARNING
Cam II (BLUE): 0° (The same for all models)
Limits the rotation towards the minimum.
With the burner off the air damper
should be completely closed: 0°
It is recommended that no adjustments are
made.
WARNING
5.5

Air / fuel adjustment

During the operations for calibrating the air/fuel ratio for oil burn-
ers, the following adjustments need to be made.
5.5.1 Oil pump outlet pressure
Turn the screw 1)(Fig. 34) on the pump.
For adjusting the pressure, see pag. 19.
20114504
Start-up, calibration and operation of the burner
Cam III (ORANGE): 20° (The same for all models)
Adjusts the start up position and the minimum
output of the fuel 1 (for single fuel burners).
Cam IV (YELLOW): 130° (The same for all models)
Adjusts the position of the maximum output of
the fuel 1 (for single fuel burners).
Cam V (BLACK): 20° (The same for all models)
Adjusts the minimum output and ignition position
of the fuel 2 (for single fuel burners).
Cam VI (GREEN): 130° (The same for all models)
adjusts the Max. output position of the fuel 2 (for
single fuel burners).
20074577
Connection
pressure gauge
31 GB
D1498
Fig. 33
1
Fig. 34