Riello P 450 P/G Instructions Pour L'installation, L'utilisation Et L'entretien page 58

Following items do not need, generally, any further adjustment:
A - Servomotor
B - Pump
C - Starter
A - SERVOMOTOR
5
4
Fig. 2
The servomotor controls contemporaneously the air delivery and pressure and the fuel delivery.
It is provided with three adjustable cams, controlling the corresponding switches.
st
1 cam: it controls the stroke of the servomotor at the position of 0°. When the burner is off the air damper is
completely closed.
nd
2 cam: it controls the stroke of the servomotor at the position of 130°.
rd
3 cam: it controls the minimum modulating output, leaves the factory set at 20°.
B - PUMP
Set by the factory at 25 bar.
C - STARTER
The starter is supplied at 230V or 400V according to the feeder line, for the adjustment of the temperature
relay see page 6.
5483
BURNERS ITEMS SET AT THE FACTORY
1
2
3
6
D1999
8
GB
st
1 - 1 Cam (blue)
nd
2 - 2 Cam (red)
rd
3 - 3 Cam (black)
4 - Pointer
5 - Clamp
6 - Motor reset lever