Servomotor; Burner Calibration; Firing; Operation - Riello RL 42 BLU Instrucciones De Instalación, Montaje Y Funcionamiento

6.2.4

Servomotor

Cam I: Set to 0° (air damper closed in shut-down posi-
tion). To open partially, increase this setting
(Fig. 22).
Cam II: Factory set to 50°.
Controls the position of the air damper at the 2
stage - it follows the servomotor only when open-
ing. To reduce the angle, go to the 1
duce the angle, and return to 2
the effect of your adjustment.
Cam III: Factory set to 40°.
Enables the 2
IV-V, so that it always anticipates cam II.
Cam IV-V: Factory set to 30°.
Controls the position of the 1
ways anticipate cams II and III.
It follows the servomotor only when closing.
To increase the angle, go to the 2
crease the setting angle, and return to 1st stage to
check the effect of your adjustment.
NOTE:
If you increase the angle from the 1
burner is operating, the burner will stop.
6.3

Burner calibration

6.3.1

Firing

Set switch 1)(Fig. 23) to "ON" and switch 2) to "1
Once the following adjustments have been made, the firing of the
burner must generate a noise similar to the noise generated dur-
ing operation.
If one or more pulsations or a delay in firing in respect to the
opening of the light oil solenoid valve occur, see the suggestions
provided in Tab. H.
Burner
Off
On
6.3.2

Operation

Interventions on the following points.
Nozzle
See the information listed on pag. 13.
Pump pressure
st
In order to adjust 1 stage pressure, use the screw 6)(Fig. 18).
nd
In order to adjust 2 stage pressure, use the screw 7)(Fig. 18).
Some combinations may cause pulsation during the 2
under high pressure; in such an event reduce the atomizing pres-
sure or use a nozzle with a full coned shaped spray and, if the de-
sired power is still not achieved, fit a larger nozzle.
6.3.3

Combustion head

In order to adjust the combustion head, use the screw 4)(Fig. 20).
For final adjustment of the combustion head, perform fume anal-
ysis at the boiler outlet.
Start-up, calibration and operation of the burner
st
stage, re-
nd
stage to check
nd
stage valve. Set it between cams
st
stage and must al-
nd
stage, in-
st
stage position while the
st
stage".
1 2
Stage
1°
2°
D469
nd
Fig. 23
nd
stage
19 GB
D1414
Fig. 22
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