31
Screw on the new nozzle (56), and position the primary air adjusting ring nut (55 - Fig. C) according to the
indications of Table 1, using a gauge or equivalent instrument to set the distance “L”, and tighten the screw
provided to fasten the nozzle.
Turn the main switch (1) to position 1, so as to connect a single heating element (50% of the boiler’s elec tric
power for single-phase heating element with 2 elements and 1/3 of power for heating elements with 3 elements
with three-phase connection), and ignite the burner as in the procedure described above. When the water
contained in the boiler reaches the preset temperature, the gas fl ow regulator will automatically decrease the
fl ow to the value corresponding to the reduced rated heat fl ow. At this point, turn the fl ow regulation screw
(58) so as to have a steady fl ame licking the sensitive thermo couple element (52), and turn the screw (57)
to obtain the maximum desired pressure value in the boiler.
After having verifi ed the proper operation, replace the settings tag on the appliance with the one for the new
type of gas that is provided with the standard kit containing the newly installed gas nozzle. Safety devices
on appliance (manually reset).
The appliance is provided with two safety devices that shut off the gas fl ow if the fl ame accidentally goes out.
1 - Thermocouple (52):
The thermocouple operates on the valve (51), whose probe (52) must be licked by
the fl ame from the burner (50). If the probe is not enveloped by the fl ame, the gas fl ow will be automa tically
shut off.
2 - Thermostat (59):
The thermostat, placed in contact with the boiler, operates on the valve (51); when the
thermostat sensor on the boiler reads 140˚C, the gas fl ow will be automatically shut off.
The burner can be re-ignited with the procedure described above only after the boiler body has cooled to
110˚C. Following the activation of one of the two safety devices, try re-igniting the burner with the procedure
already described.
If the malfunction persists, and the burner consequently continues to go off, contact the nearest authorized
Service outlet, which will provide to eliminate the cause of the malfunc tion.
