Riello P 300 P/G Manuel D'entretien page 58

Following items do not need, generally, any further adjustment:
A - Servomotor
B - Pump
C - Motor overload relay
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°.
5482
BURNERS ITEMS SET AT THE FACTORY
1
2
3
6
D1999
9
GB
st
1 - 1 Cam (blue)
nd
2 - 2 Cam (red)
rd
3 - 3 Cam (black)
4 - Pointer
5 - Clamp
6 - Motor reset lever