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9
Maintenance
9.1
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.
9.2
Maintenance programme
9.2.1
Maintenance frequency
The combustion system should be checked at least once a
year by a representative of the manufacturer or another
specialised technician.
9.2.2
Checking and cleaning
Combustion
The optimum calibration of the burner requires an analysis of the
flue gases. Significant differences with respect to the previous
measurements indicate the points where more care should be
exercised during maintenance.
Pump
The delivery pressure must be stable. The depression must be
less than 0.4 bar. Unusual noise must not be evident during pump
operation.
If the pressure is found to be unstable or if the pump runs noisily,
the flexible hose must be detached from the line filter and the fuel
must be sucked from a tank located near the burner. This meas-
ure permits the cause of the anomaly to be traced to either the
suction piping or the pump.
If the pump is found to be responsible, check to make sure that
the filter is not dirty. The vacuometer is installed upstream from
the filter and consequently will not indicate whether the filter is
clogged or not. Contrarily, if the problem lies in the suction line,
check to make sure that the filter is clean and that air is not enter-
ing the piping.
Delivery pressure must correspond with the table on Tab. J on
page 23. please check that the supply line and filters are clear.
The use of a pump vacuum gauge will assist in this. This measure
permits the cause of the anomaly to be traced to either the suc-
tion line or the pump.
If the problem lies in the suction line, check to make sure that the
filter is clean and that air is not entering the piping.
Hoses
Check periodically the flexible pipes conditions. They have
to be replaced at least every 2 years.
In case of use of gas oil and bio fuel blends, it is strongly rec-
ommended to inspect even more frequently the hoses and
replace them where contamination has occurred.
Check to make sure that the hoses are still in good condi-
tion.
6426
Maintenance
Before carrying out any maintenance, cleaning or checking oper-
ations:
Disconnect the electrical supply from the burner
by means of the main system switch.
DANGER
Close the fuel interception tap.
DANGER
Filters (Fig. 29)
Check the following filter baskets:
• on line 1) • in the pump 2) • at the nozzle 3), and clean or replace
if necessary.
If rust or other impurities are observed inside the pump, use a
separate pump to lift any water and other impurities that may
have deposited on the bottom of the tank.
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.
Photocell
Clean the glass cover from any dust that may have accumulated.
To extract the photocell 4)(Fig. 4 to page 11) pull it outward force-
fully. It is only pressed in.
Combustion head
Check to make sure that all the parts of the combustion head are
in good condition, positioned correctly, free of all impurities, and
that no deformation has been caused by operation at high tem-
peratures.
Nozzles
Do not clean the nozzle openings.
It is advisable to replace nozzles every year during regular main-
tenance operations.
The change of nozzle requires the combustion to be controlled.
26
GB
D482
Fig. 29
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