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6
Maintenance
6.1
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.
6.2
Maintenance programme
6.2.1
Maintenance frequency
The combustion system should be checked at least once a year
by a representative of the manufacturer or another specialised te-
chnician.
6.2.2
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 ex-
ercised during maintenance.
Pump
The delivery pressure must be stable. Unusual noise must not be
evident during pump operation. If the pressure is found to be unsta-
ble 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 measure permits the cause of the anomaly to be traced to ei-
ther the suction piping or the pump. If the pump is found to be re-
sponsible, check to make sure that the filter is not dirty.
The vacuum meter is installed upstream from the filter and conse-
quently 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 entering the piping.
Flexible hoses
Check to make sure that the flexible hoses are still in good condi-
tion and that they are not crushed or otherwise deformed. Check
periodically the flexible pipes conditions.
Fuel tank
Approximately every 5 years, or whenever necessary, suck any
water or other impurities present on the bottom of the tank using a
separate pump.
Maintenance
Before carrying out any maintenance, cleaning or checking op-
erations:
Disconnect the electricity supply from the burner by
means of the main switch of the system.
DANGER
Close the fuel interception tap.
DANGER
Filters
Check the following filter boxes: on fuel supply line; in the pump;
and clean or replace as required.
If rust or other impurities are observed inside the pump, use a se-
parate pump to lift any water and other impurities that may have de-
posited on the bottom of the tank. Then clean the insides of the
pump and the cover sealing surface.
Nozzles
Do not clean the nozzle openings; do not even open them. Replace
the nozzles every every year or whenever necessary. Combustion
must be checked after the nozzles have been changed.
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 temper-
atures.
Photoresistance
Clean the photoresistance.
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 or-
der to maintain all the original combustion characteristics intact, es-
pecially the flue gas temperature and combustion chamber
pressure.
Leave the burner working without interruptions for 10 min. and set
rightly all the components stated in this manual.
Then carry out a combustion check verifying:
•
smoke temperature at the chimney;
•
content of CO 2 (%);
•
content of CO (ppm);
•
smoke value according to opacity smokes index according to
Bacharach scale.
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