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8
Maintenance
8.1
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.
8.2
Maintenance programme
8.2.1
Maintenance frequency
The combustion system should be checked at least once a year
by a representative of the manufacturer or another specialised
technician.
8.2.2
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.
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.
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.
Burner
Check for excess wear or loose screws. Also make sure that the
screws securing the electrical leads in the burner connections are
fully tightened. Clean the outside of the burner.
Filters
Check the filtering baskets on line and at nozzle present in the
system. 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.
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 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 either
the suction piping or the pump.
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
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. 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 suction 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 enter-
ing 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.
Nozzles
Do not clean the nozzle openings; do not even open them.
The nozzle filters however may be cleaned or replaced as re-
quired. It is advisable to replace nozzles every year during regu-
lar maintenance operations. Combustion must be checked after
the nozzles have been changed.
Fuel tank
If water or contamination is present within the fuel tank, it is es-
sential that this is removed before the equipment is to be used.
This is extremely important when gas oil containing Bio diesel is
in use. If in doubt about how to achieve this then please contact
the fuel or oil tank supplier.
Combustion
In case the combustion values found at the beginning of the inter-
vention do not respect the standards in force or, in any case, do
not correspond to a proper combustion, contact the Technical
Assistant and have him carry out the necessary adjustments.
EN 267
Theoretical max. CO
0 % O
2
15.2
GB
27
Excess air
Max output
Min output
λ ≤ 1.2
Calibration CO
%
2
2
λ = 1,2
λ = 1,3
12.6
11.5
λ ≤ 1.3
CO
mg/kWh
≤ 100
20036074
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