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6
Maintenance
6.1
Notes on safety for the maintenance
The periodic maintenance is essential for the good operation, safe-
ty, yield and duration of the burner.
It allows you to reduce consumption and polluting emissions and to
keep the product in a reliable state over time.
The maintenance interventions and the calibration
of the burner must only be carried out by qualified,
authorised personnel, in accordance with the con-
tents of this manual and in compliance with the
DANGER
standards and regulations of current laws.
Before carrying out any maintenance, cleaning or checking opera-
tions:
6.2
Maintenance programme
6.2.1
Maintenance frequency
The gas combustion system should be checked at
least once a year by a representative of the manu-
facturer or another specialised technician.
6.2.2
Checking and cleaning
The operator must use the required equipment dur-
ing maintenance.
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases. Significant differences with respect to the previous
measurements indicate the points where more care should be ex-
ercised during maintenance.
Combustion head
Open the burner and make sure that all the components of the
combustion head are:
–
undamaged
–
not deformed due to high temperature
–
free of ambient dirt or dust
–
free of rusted materials
–
adequately positioned
Make sure that the gas outlet holes for the start-up, on the combus-
tion head distributor, are free of dirt or rust deposits. In case of
doubt, disassemble the inner part (Fig. 41, page 32).
20069791
Maintenance
Disconnect the electrical supply from the burner by
means of the main system switch.
DANGER
Close the fuel interception tap.
DANGER
Wait for the components in contact with heat sourc-
es to cool down completely.
Measurement of detector current
Measurement of the detector's signal (Fig. 37) with a Voltmeter is
not normally required since the flame signal's intensity is shown on
the AZL...display and operating unit.
Min. value for a good work: 3.5 Vdc (AZL dosplay flame approx.
50%).
If the value is lower, it can depend on:
–
photocell positioned incorrectly;
–
low corrent (lower than 96V);
–
bad regulation of the burner.
To measure power, use a voltometer with a 10 Vdc scale, connect-
ed as illustrated in Fig. 37.
D3020
Flame inspection window
Clean the flame inspection window 1)(Fig. 38).
D10500
30
GB
Fig. 37
1
Fig. 38
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