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Maintenance
Nozzles
Do not clean the nozzle opening; do not even open it. The nozzle
filter however may be cleaned or replaced as required. Replace
the nozzle every 2-3 years or whenever necessary. After chang-
ing the nozzle, the combustion must be checked.
Sensor flame (Fig. 39)
Clean the glass cover from any dust that may have accumulated.
In order to extract the sensor 2) from its seat, raise the spring 1).
Hoses
Check to make sure that the flexible hoses are still in good con-
dition and that they are not crushed or otherwise deformed.
Gas oil fuel supply line (Fig. 40)
If the previous checks have suggested that air may be entering
the circuit somewhere, pressurize the circuit piping. Plug the
pump's return line connector 1) (Fig. 40) after removing the flexi-
ble hose. Install a union T 2) (Fig. 40) on the vacuum meter at-
tachment. On one branch of the T install the pressure gauge 3)
and on the other branch 4) inject air at a pressure of 1 bar. After
the injection of air has stopped, the gauge reading should remain
stable. The suction piping must be equipped with a foot valve 5).
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.
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. Lastly, check the condition of the flue gas stack.
Close the burner and apply power.
If the combustion characteristics measured at the beginning of
the control operation do not match the values listed in the previ-
ous inspection's technical report sheet or fail to provide satisfac-
tory combustion, the burner must be re-calibrated.Write the new
values down on the data sheet illustrated on page 41 or a similar
document. These values will be useful for comparison during fu-
ture checks. Lastly, check to make sure that the fan air gate valve
is in good condition and that the screws are tightly locked. The
tightness of the screws that fasten the cables to the burner termi-
nal block must also be checked. Clean the outside surfaces of the
burner and spray all parts that show signs of rusting with silicon
rust-preventer.
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