ignition electrodes fastened in
place with a faston.
– loosen the union (2 fig. 17/a) and
remove the four screws which fas-
ten the collar (3 fig. 17/a) to the
burner.
– To dismantle the eater or ther-
mostat, refer to figure 17/b.
4.4
CLEANING
AND MAINTENANCE
Preventive maintenance and checking
of the efficient operation of the equip-
ment and safety devices must be car-
ried out at the end of each heating
season exclusively by the authorised
technical staff.
4.4. 1 Cleaning smoke ducts
(fig. 18)
Use an adequate swab for cleaning
the smoke ducts of the boiler. After
cleaning, position the circulators in
their original position (fig. 18).
4.4.2 Cleaning combustion head
(fig. 19)
The combustion head is cleaned in the
following manner (fig. 19):
– Disconnect the high tension cables
from the electrodes.
– Unscrew the fixture screws of the
circulator support and remove it.
– Brush the propeller delicately (tur-
bulence disc).
– Carefully clean the photo-resistance
of eventual deposits of dirt deposit-
96
1
2
1
2
3
KEY
1 Control bow cables
2 Connection
3 Collar
KEY
1 Heater stat
2 Cap
3 Heater
3
RONDO' 3/4 OF
ESTELLE 3/4 OF
RONDO' 5/6 OF
ESTELLE 5/6 OF
Fig. 17
Fig. 17/a
Fig. 17/b
Fig. 18