20098582
28
GB
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, especially in the following areas:
➤
the electrode tips
➤
the electrode insulators
➤
the high-voltage cable
➤
the nozzle and the flame stability disk
➤
the blast tube, especially at its end
➤
the boiler plate/burner gasket
➤
the boiler door fettling
Photocell (Fig. 28)
Clean the glass cover from any dust that may have accumulated.
In order to extract the photocell 2) from its seat, unscrew the
screw 1).
Light oil fuel supply line (Fig. 29)
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. 29) after removing
the flexible hose.
Install a union T 2) on the vacuum meter attachment.
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.
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
50 or a similar document. These values will be useful for compar-
ison during future 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 terminal 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.
Fig. 28
D2561
Fig. 29
D387