Riello DB 3 LSM C13 Installation, Use And Maintenance Instructions page 46

5.2 Servomotor adjustment (SQM 10)
1 - 4 : Limit switch cam (max. air damper opening)
2 : Limit switch cam (air damper closed)
3 - 5 : Minimum delivery (and ignition) position cam
6 : Positioning reading indicator
7 : Servomotor release
The servomotor contemporarily regulates, by transmission, air
delivery and pressure and delivery of the fuel being used.
It is fitted with a number of adjustable cams that action the same
number of selector switches.
Cam pos.1: limits maximum opening of the servomotor.
Cam pos.2: limits servomotor limit switch in the 0° position.
It is set in the factory at approx. 20° (just one
type of fuel.
Cam pos.3: fixes the minimum modulation position.
It is set in the factory at approx. 20° (just one
type of fuel).
Cam pos.4: limits maximum opening of the servomotor (for
mixed burners working with gas).
Cam pos.5: limits minimum delivery. It is set in the factory
at approx. 20° (for mixed burners working with
gas).
Cam rest: available.
Important:: the position of 130° must not be exceeded for limit
switches (cam 1 - 4).
5
Preparation for start up
CHAPTER
D1500
Fig. 17
15