Riello GI/EMME 1400 Manual page 35

6.10.2 Burner calibration procedure
 Install the nozzle suitable to achieve the maximum desired
output.
 Verify that the eccentricity of the oil cam is such to make a
travel of about 8 mm on the shaft of oil modulator.
Normally, with a shaft stroke of 8 mm, the pressure variation
needed for the modulation of the minimum to maximum
output is obtained.
To verify this, manually rotate the cam after having released
the servomotor with the small button placed under its cams,
so that the travel of the shaft is not exaggerated or
insufficient. Remember to block the servomotor after the
verification.
 Switch on the burner with the selector on the control panel in
manual "MAN".
At this point, after the pre-purging phase, the servomotor
stops at about 45°.
 Adjust the outlet pressure of the pump as shown in point A
(oil pump outlet pressure) to obtain an outlet pressure to
the nozzle of 24 - 25 bar.
 Adjust the minimum return pressure to approx. 6 bar.
To do so, the length of the shaft 5)(Fig. 32) must be varied
by means of nut 6).
 Calibrate the air delivery by adjusting the variable profile
cam with the screws 2)(Fig. 33).
 Having performed this first adjustment, increase the output
supplied via the automatic return selector on the control
panel. Pause after a 15° rotation of the servomotor and
perform another adjustment by means of the variable profile
cam of the air.
It is recommended to perform a calibration that will prevent
the formation of a smoky flame and arrive as soon as
possible to the maximum output (maximum stroke of the
servomotor 130°); on the eccentric screw 5)(Fig. 32),
calibrate the pressure on the return line to obtain the output
desired and requested by the nozzle, and then go back to
calibrate the intermediate points.
 Then recheck the values of the combustion parameters at
the various modulation outputs and if necessary make the
necessary adjustments.
 Turn off the burner and wait for the complete shut-down of
the fan motor.
 Now move the selector 1)(Fig. 5 on page 12) to "GAS",
perform a new ignition and check the correct gas operation
at the desired output.
If this is not so, calibrate the gas cam as in point C (Gas
Cam) mentioned above.
 With the optimal adjustment achieved, remember to lock the
adjustment screws of the cam profiles by means of screws
3)(Fig. 33).
When calibrating the cams, never go beyond the
travel limits of the servomotor 0° - 130° to avoid
any sticking.
ATTENTION
Carrying out a manual travel 0 - 130° of the cams,
check that there are no mechanical stops before
the micro-switches 1-2 of the servomotor are
activated.
Start-up, calibration and operation of the burner
33 GB
20162463