Riello RS 150/M, Инструкции по установке, использованию и обслуживанию

Страница: 27 / 48

25
20054085
GB
Start-up, calibration and operation of the burner
6.3 Burner start-up
Feed electricity to the burner via the disconnecting switch on the
boiler panel.
Close the thermostats/pressure switches and turn the switch to
MAN
(Fig. 28).
6.4 Burner ignition
Having completed the checks indicated in the previous heading,
ignition of the burner should be achieved.
If the motor starts but the flame does not appear and the control
box goes into lockout, reset and wait for a new ignition attempt.
If ignition is still not achieved, it may be that gas is not reaching
the combustion head within the safety time period of 3 seconds.
In this case, increase gas ignition delivery. The arrival of gas to the pipe coupling is shown by the pressure
gauge.
Once the burner has fired, now proceed with global calibration
operations.
6.5 Servomotor adjustment
The servomotor (Fig. 30) simultaneously adjusts the air damper
(by means of the variable profile cam) and the gas butterfly valve.
The servomotor rotates by 130 ° in 42 seconds.
Cam I: 130°
Limits rotation toward maximum position.
When the burner is at MAX output, the gas butterfly
valve must be fully open: 90°.
Cam II: 0°
Limits rotation toward minimum position.
When the burner is shut down, the air damper and
gas butterfly valve must be closed: 0°.
Cam III: 50°
Adjusts the ignition position and the MIN output.
Cam V:
integrated with cam III.
WARNING
As soon as the burner starts up:
–
check the fan rotation direction through the
flame inspection window (Fig. 29);
– check the fan motor rotation direction, as
shown in Fig. 29.
DANGER
Make sure that the lights or testers connected to
the solenoids, or the pilot lights on the solenoids
themselves, indicate that no voltage is present.
If voltage is present, stop the burner immediately
and check the electrical connections.
D791
1 2
Fig. 28
D8694
Fig. 29
WARNING
Do not alter the factory setting for the 5 cams;
check only that they are as shown below.
Fig. 30
D3859