Riello RLS Series, Installation, Use And Maintenance Instructions

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Start-up, calibration and operation of the burner
5.3 Burner start-up
Feed electricity to the burner via the disconnecting switch on the
boiler panel.
Close the thermostats/pressure switches.
Make sure that the lamps or testers connected to the
solenoids, or indicator lights on the solenoids them-
selves, show that no voltage is present. If voltage is
present, stop the burner
immediately and check the
electrical wiring.
For the start-up procedure and the parameters
calibration, refer to the specific instruction
manual.
5.4 Burner firing
Having completed the checks indicated in the previous heading,
the burner should fire. If the motor starts but the flame does not
appear and the control box goes into lock-out, reset and wait for
a new firing attempt.
If firing 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 firing delivery.
The arrival of gas at the sleeve is indicated by the U-type ma-
nometer (Fig. 26).
Once the burner has fired, now proceed with global calibration
operations.
5.5 Combustion air adjustment
Fuel/combustion air must be synchronized with the relevant ser-
vomotors (air and gas) by storing a setting curve by means of
the electronic cam.
To reduce pressure loss and to have a wider adjustment range,
it is best to set the servomotor to the maximum output used, as
near to maximum opening (90°) as possible.
On the gas butterfly valve, the fuel’s partial setting adjustment
based on required output, with the servomotor fully open, is
made by using the pressure stabilizer on the gas train.
DANGER
WARNING