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7
Maintenance
7.1
Notes on safety for the maintenance
The periodic maintenance is essential for the good operation,
safety, 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-
DANGER
tents of this manual and in compliance with the
standards and regulations of current laws.
7.2
Maintenance programme
7.2.1
Maintenance frequency
The gas combustion system should be checked at
least once a year by a representative of the man-
ufacturer or another specialised technician.
7.2.2
Checking and cleaning
The operator must use the required equipment
during maintenance.
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases.
Significant differences with respect to the previous measure-
ments indicate the points where most care should be exercised
during maintenance.
Combustion head
Open the burner and make sure that all components of the
combustion head are in good condition, not deformed by the
high temperatures, free of impurities from the surroundings
and correctly positioned.
Voltage on the QRI cell
Min value for a good work: 3.5V DC (value on AZL display at
about 50%).
If the value is lower, it could be due to:
-
cell not positioned correctly
-
low voltage (lower than 187 V)
-
bad regulation of the burner
In order to measure, use a voltmeter with a 10V DC scale con-
nected as in the diagram (Fig. 44).
20067636
Maintenance
Before carrying out any maintenance, cleaning or checking oper-
ations:
Turn off the burner's electrical supply using the
main system switch.
DANGER
Turn off the fuel interception tap.
DANGER
Wait for the components in contact with heat
sources to cool down completely.
D9174
Burner
Clean the outside of the burner.
Fan
Check to make sure that no dust has accumulated inside the fan
or on its impellers, as this condition will cause a reduction in the
air flow rate and provoke polluting combustion.
Boiler
Clean the boiler as indicated in its accompanying instructions in
order to maintain all the original combustion characteristics in-
tact, especially: the flue gas temperature and combustion cham-
ber pressure.
36
GB
LMV...
X10-02 / 6
X10-02 / 4
X10-02 / 2
+
0...10 V
Ri > 10 M
Fig. 44
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