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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-
tents of this manual and in compliance with the
DANGER
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 manufacturer or another
specialised technician.
7.2.2
Checking and cleaning
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.
Burner
Check that there is no excess wear or loose screws, especially
on cams 1) and 2)(Fig. 34).
Clean the outside of the burner.
Clean and grease the adjustable profile of the cams.
Fan
Check to make sure that no dust has accumulated inside the fan
or on its blades, 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.
Maintenance
Before carrying out any maintenance, cleaning or checking oper-
ations:
Turn off the burner's power supply using the main
system switch.
DANGER
Turn off the fuel interception tap.
DANGER
Electrical current to UV cell (Fig. 44)
Clean the glass cover from any dust that may have accumulated.
To remove the photocell, pull out outwards; it is only pressed in.
Min value for a good work: 70 µA.
If the value is lower, it could be due to:
–
exhausted photocell
–
low voltage (lower than 187 V)
–
bad regulation of the burner
In order to measure the current, use a microammeter of 100 µA
d.c., connected in series to the photocell, as in the scheme, with
a capacitor of 100 µF - 1V d.c. at the same level of the instrument.
D1143
41
GB
Fig. 44
20084880
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