Minimum Output; Intermediate Outputs - Riello RLS 160/M MX Installation, Use And Maintenance Instructions

6.9.3

Minimum output

MIN output must be selected within the firing rate range indicated
on Fig. 3 on page 10. Press button 2)(Fig. 39) "Output decrease"
and keep it pressed until the servomotor reaches (Fig. 39) the
factory adjustment.
Air adjustment
Progressively adjust the end profile of the mechanical cam
4)(Fig. 38 on page 32), using the screws 5)(Fig. 38 on page 32).
For example, calibrate the minimum output to 800 kW, check the
emissions and if necessary increase or decrease the opening of
the air damper ("Air adjustment" on page 33).
Bring the output to 800 kW using the screws 5) of the mechanical
cam (Fig. 38 on page 32) and check the emissions.
Adjustment of gas delivery
The air is adjusted by changing the angle of cam III) of the
servomotor (Fig. 39) and by using the selector 2)(Fig. 39).
To adjust the cam of the servomotor, see Fig. 39.
NOTE:
The servomotor follows the adjustment of cam III only when
the angle of the cam is reduced.
If it is necessary to increase the angle of the cam, you must
first increase the angle of the servomotor by means of the
"output increase" key, then increase the angle of cam III, and
finally bring the servomotor to the position of MIN output,
with the "Output reduction" key.
To adjust cam III, see Fig. 39.
6.9.4

Intermediate outputs

Adjustment of gas delivery
No adjustment is required
Air adjustment
After adjusting the maximum and minimum output of the burner,
carry out air adjustment on higher intermediate positions of the
servomotor.
The passage from one position to the next one is obtained by
pressing the button 2) on the symbol (+) or (-) (Fig. 36 on
page 30). Press button 2)(Fig. 36 on page 30) "Output increase"
briefly so that the servomotor rotates by about 20°, see
servomotor graduated index Fig. 39 and air damper graduated
index 5)(Fig. 38 on page 32).
Screw or unscrew the screw 5) of the mechanical cam (Fig. 38 on
page 32) to increase or decrease the gas output so as to adjust
it to the corresponding air output, to obtain optimal combustion.
Proceed in the same way with the other screws.
Take care that the cam profile variation is
progressive.
ATTENTION
Start-up, calibration and operation of the burner
Switch off the burner using switch 1)(Fig. 36 on page 30), OFF
position, release the mechanical cam I) (Fig. 38 on page 32) to
separate the gears of the servomotor, pressing and moving
downwards button 3)(Fig. 39), then manually rotate the
mechanical cam I) (Fig. 39) backwards and forwards a few times
to check that the movement is smooth and without any hindrance.
It is recommended that the mechanical cam
5)(Fig. 38 on page 32) be bound again to the
servomotor by shifting button 3)(Fig. 39) upwards.
ATTENTION
As far as is possible, try not to move those screws at the ends of
the mechanical cam that were previously adjusted for the
opening of the gas butterfly valve to MAX and MIN output.
NOTE:
Once "MAX - MIN - INTERMEDIATE" outputs have been
adjusted, 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.
10
D3924
33 GB
3
2
Fig. 39
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