15
CHAPTER
5
Preparation for start up
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).
Fig. 17
D1500
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