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Adjustment of air delivery
Progressively adjust the initial profile of cam 4)(Fig. 33) by
turning the screws 5). If possible, do not turn the first screw,
since this is used to set the air damper to its fully closed
position.
D791
D1710
20152093
Start-up, calibration and operation of the burner
1
2
D889
1
Servomotor
2
Servomotor 1) - cam 4): fastened
3
Servomotor 1) - cam 4): unfastened
4
Variable profile cam
5
Screws for adjusting the adjustable profile
6
Screws for fixing adjustment
7
Screws for adjusting the end profile
8
Gas butterfly valve graduated sector
9
Index of graduated sector 8
10 Spanner to adjust cam III
INTERMEDIATE OUTPUTS
Adjustment of gas delivery
No adjustment of gas delivery is required.
Fig. 32
Adjustment of air delivery
Lightly press the "increase output" button 2)(Fig. 32) so the
servomotor rotates by about 15°. Adjust the screws until
optimal combustion is obtained. Proceed in the same way
with the other screws. Take care that the cam profile variation
is progressive.
Switch the burner off with switch 1)(Fig. 32), OFF position.
Release cam 4) from the servomotor by pressing and shifting
button 3) to the right, and check several times that by rotating
cam 4) forwards and backwards by hand, the movement is
soft and smooth, without jamming.
Engage cam 4) to the servomotor again by shifting button 2)
to the left.
As far as is possible, try not to move those screws at the ends
of the cam that were previously adjusted for the opening of
the air damper to MAX and MIN output.
Once optimum adjustment has been reached, fix it with the
screws 6).
NOTE:
Once adjustment of "MAX - MIN - INTERMEDIATE" outputs
Fig. 33
has been completed, recheck the ignition: its noise must be
equal to the one of the following operation. If you notice any
sign of pulsations, reduce the ignition stage delivery.
32
GB
Fig. 34
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