Output In 1St Stage; Intermediate Outputs - Riello RS 70 Installation, Use And Maintenance Instructions

Air adjustment
Progressively adjust the end profile of cam 3)(Fig. 26) by turning
the screws 5).
Turn the screws clockwise to increase air delivery.
Turn the screws anticlockwise to reduce air delivery.
D729
1 Servomotor
2 Cam cover
3 Variable profile cam
4 Screws for adjusting the adjustable profile
5 Screws for adjusting the end profile
6 Graduated sector for gas butterfly valve
7 Index for graduated sector 6
6.5.3

Output in 1st stage

The 1st stage output must be selected from within the firing rate
range shown on page 4.
Turn the switch 2)()Fig. 25 on page 24 to the 1st stage position:
the servomotor 1)(Fig. 26) will close the air damper and, at the
same time, also the gas butterfly valve closes to 15°, i.e. to the
factory setting.
Adjustment of gas delivery
Measure the gas delivery on the gas meter.
– If it is necessary to decrease it, slightly decrease the angle of
the orange lever (Fig. 30 on page 28) namely from angle 15°
to 13° - 11°....
– If it is necessary to increase it, pass to 2nd stage by activating
the switch 2)(Fig. 25 on page 24) and slightly increase the an-
gle of the orange lever with small, regular movements, i.e.
bring it from an angle of 15° to 17° - 19°....
Now return to the 1st stage and measure the gas output.
NOTE:
The servomotor only follows the adjustment of the orange
lever when the angle of the cam is reduced. If the angle
needs to be increased, pass to the 2nd stage, increase the
angle and then return to the 1st stage to check the effects of
the adjustment.
Adjustment of air delivery
Progressively adjust the initial profile of the cam 3)(Fig. 26) by
turning the screws 4). It is preferable not to turn the first screw
since this is used to set the air damper to its fully closed position.
20144609
Start-up, calibration and operation of the burner
Fig. 26
6.5.4

Intermediate outputs

Adjustment of gas delivery
No adjustment is required
Adjustment of air delivery
Switch off the burner using the switch 1)(Fig. 25 on page 24), and
turn the intermediate screws of the cam so that the inclination of
the cam itself is progressive.
Try not to move the screws at the end of the cam that was previ-
ously adjusted to open the air damper in the 1st and 2nd stage.
NOTE:
Once you have finished adjusting the "2nd stage - 1st stage
- intermediate" outputs, check the ignition once again: noise
emission at this stage must be identical to the following
stage of operation. If you notice any sign of pulsations, re-
duce the ignition stage delivery.
26 GB