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13 - MAINTENANCE
A = Left ignition electrode
B = Right ignition electrode
C = Flame detection electrode
Figure 42 - Positioning electrodes on burner (Use
an hand caliper to verifi e the distances of the
electrodes)
13.4 - Correct
positioning of
the ignition and
fl ame detection
electrodes
For the boiler to work properly the
electrodes must be positioned as
shown in fi gure 42:
For a correct functioning of the
boiler the below distances shall be
verifi ed with an hand caliper.
13.5 - Domestic
hot water heat
exchanger
The production of DHW takes place in
the secondary heat exchanger, detail
"42" in fi gure 1. If this heat exchanger
looses effi ciency over time, it may be
necessary to clean or replace it.
60
the distance between the ignition
electrodes "A" and "B", must be
between 0.08 in (2 mm), and 0.10
in (2.5 mm);
the distance of the ignition
electrodes to the burner surface
must be between 0.20 in (5.0 mm),
and 0.22 in (5.5 mm);
the distance of the fl ame detection
electrode to the burner surface
must be between 0.23 in (6.0 mm),
and 0.27 in (7.0 mm).
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