5481
12
GB
In order to vary the stroke of the combustion head, follow these indications:
the connecting rod (1) which drives the push-rod (8) of the combustion head, is provided with a slot; by moving the
tension rod (9) towards the external part of the slot, the stroke of the combustion head may be shortened up to 20
mm.
If a higher reduction should be necessary, act in this way:
with the servomotor at 0°, loosen the screws (5) and push, in the arrow direction, the ring (6) placed under the cam
with adjustable profil (7).
So it is obtainable a reduction of the eccentricity with the consequent reduction of the stroke.
After the setting fasten the screws (5).
With the aforesaid settings, the stroke of the combustion head is fixed.
Following the example (6 set-points) it is necessary that the start and the end of the stroke are coincident with the
desired values: 1 and 7.
In order to obtain this turn the hexagonal coupling (3) clockwise or anticlockwise, after loosening of the nuts (4).
With the servomotor positioned at 0°, the set-point 1 shall be coincident with the reference plane (10), while, if the ser-
vomotor is positioned at 130° the index shall be coincident with the set-point 7.
After the setting fasten the nuts (4) with the ball joint (9), as indicated in the drawing.
The combustion head settings have to be carried out with burner closed, not in operation and with servomotor free.
After the setting verify manually the operation, by turning the cam (7), and that no slow-down exists between 0° and
130°.
Fig. 4
8
10
9
1
4
3
2
4
7
5
6
2581
