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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 measure-
ments indicate the points where more care should be exercised
during maintenance.
Combustion head
Open the burner and make sure that all components of the com-
bustion head are in good condition, not deformed by the high
temperatures, free of impurities from the surroundings and cor-
rectly positioned. If in doubt, extract the internal part 5)(Fig. 44).
UV cell
Clean the glass cover from any dust that may have accumulated.
The UV cell 17)(Fig. 6 at page 13) is held in position by a pres-
sure fit and can therefore be removed by pulling it outward force-
fully.
Flame inspection window
Clean the flame inspection window (Fig. 43).
D484
20035573
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
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.
Servomotor
Disengage the cam 4)(Fig. 36 at page 29) from the servomotor,
by pressing and moving button 3)(Fig. 37) towards the right, and
turn it backwards and forwards by hand to make sure it moves
freely. Now engage the cam again by moving the button
2)(Fig. 37) to the left.
Burner
Check for excess wear or loose screws in the mechanisms con-
trolling the air gate valve and the gas butterfly valve. Also make
sure that the screws securing the electrical leads in the burner
terminal strip are fully tightened.
Clean the outside of the burner, taking special care with the trans-
mission joints and cam 4)(Fig. 36 at page 29).
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.
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 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.
Fig. 43
32
GB
GAS OIL OPERATION
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