50
perature exceeds 95°C.
To restart the boiler, unscrew the
black cover and press the button
underneath.
If the problem occurs frequently,
call an authorised technical assis-
tance centre for the necessary
checks to be carried out.
3.2.3 System filling (fig. 6)
If the orange LED (9) switches on due
to the enabling of the water pressu-
re switch and stops the boiler, it is
possible to restart it by resetting
the plant pressure to 1-1.2 bar (98-
117.6 kPa). The system pressure is
checked through the hydrometer
mounted on the heating delivery
tube (16 fig. 2).
3.2.4 Turning OFF boiler (fig. 6)
To turn off the boiler, cut off the volt-
age by pressing the mains switch (1).
Close both the gas-feed pipe tap and
the water tap if the boiler remains
inoperative for a long period.
3.3
REGULAR CLEANING
Maintenance of the boiler should be
carried out annually by an autho-
rised service engineer.
Disconnect the boiler from the
electrical supply before servicing
or maintenance is carried out.
3.3.1 Smoke side boiler (fig. 7)
To carry out cleaning of the smoke
passages remove the screws that
fix the door to the body of the boiler
and with the special cleaning brush
clean the internal surfaces and the
smoke evacuation tube well, remov-
ing any deposits. Once the mainte-
nance is compled, the baffles have
to be fitted onto the original posi-
tions.
3.3.2 Tank unit
protection anode (fig. 8)
Check the magnesium anode
periodically; replace when
exhausted. Failure to renew
exhausted anodes will render
RONDO' 3/4 OF
ESTELLE 3/4 OF
RONDO' 5/6 OF
ESTELLE 5/6 OF
Fig. 7
Fig. 8
