4.7.1
Cleaning smoke ducts
Use an adequate swab for cleaning
the smoke ducts of the boiler. After
cleaning, position the circulators in
their original position (fig. 16).
4.7.2 Cleaning combustion head
The combustion head is cleaned in the
following manner (fig. 17):
–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-
ed on its surface.
–Clean the remaining components of
the combustion head of eventual
deposits.
–Upon completion re-assemble the
u n i t i n t h e o p p o s i t e w a y a s
descr ibed above t aking car e t o
r espect t he indicat ed measur e-
ments.
4.7.3 Substitution of nozzle
The nozzle should be substituted at
the beginning of every heating system
for guaranteeing the correct fuel flow
and a good spray efficiency.
The nozzle is substituted in the follow-
ing manner:
–Disconnect the high tension cables
from the electrodes.
–Loosen the fixture screw (A fig. 17)
o f t h e e l e c t r o d e s s u p p o r t a n d
remove it.
–Block the spray door using a n°19
79
2
1
3
KEY
1
Heater stat
2
Cap
3
Heater
Fig. 15/b
4 ± 0,3 mm
A
2 - 2,5 mm
Fig. 17
RONDO' 3/4 OF
ESTELLE 3/4 OF
RONDO' 5/6 OF
ESTELLE 5/6 OF
Fig. 16
Summary of Contents for DUETTO 20 OF
Page 1: ...Solo Duetto OF BF IT ES PT GB FR BE RO CERTIFICAZIONE DEL SISTEMA DI QUALITA AZIENDALE ...
Page 44: ...42 ...
Page 146: ......
Page 147: ......
