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At least once a year, carry out the following maintenance procedures. Where servicing is on a seasonal basis it is recommended
for the end of the heating season; routine servicing should be carried out every 6 months if the burner operates the year long.
WARNING: All operations on the burner must be carried out with the power disconnected!
PERIODICAL SERVICING
Clean and examine the oil filter cartridge and replace it if necessary.
Examine the condition of the oil flexible hoses and check for possible leaks.
Clean and examine the filter inside the oil pump (see instructions in the Appendìx).
Dismantle, examine and clean the combustion head and when reassembling be carefully to respect the measures shown in
Tab. 9.
Examine the ignition electrodes and their ceramic insulators, adjust and replace if necessary (see Fig. 21a and Fig. 21b).
Dismantle and clean the oil nozzle (important: use solvents for cleaning, not metal utensils), and at the end of the mainte-
nence procedures, after replacing the burner, turn it on and check the shape of the flame; if in doubt replace the nozzle.
If the burner is used intensively it is recommended to replace the nozzle(s) at the start of the operating season.
Examine and carefully clean the flame detector photoelectric cell and replace it if necessary. If in doubt, light the burner and
check the detection circuit following the procedure illustrated in Fig. 22.
Correct position of electrodes and combustion
head
Prepare a stable surface where lean the burner
during maintenance.
To gain access to the combustion head and to the
nozzles, slacken the screw VB on the blast tube
and remove it from the part that remains fixed to
the boiler.
To guarantee a good ignition, respect the measu-
res indicated in Tab. 9.
Be sure to tight the screw that fix the electrodes
group, before reassembly the burner.
Fig. 21a - Burners G4 and G6
Check the detection current
See the diagram in Fig. 22, to measure the detection current. If
the signal doesn't suit the suggested value, verify the electric
terminals, the cleaning of the combustion head and the position
of the photoelectric cell and replace it if required.
Minimum current intensity with flame: 65 µA
Maximun current intensity without flame: 5 µA
Maximum possible current intensity with flame: 200 µA
14
PART III: MAINTENANCE MANUAL
Tab. 9
G4 - G4 P
G6
G10 - G18
Fig. 21b - Burners G10 and G18
Fig. 22
PART III: MAINTENANCE MANUAL
NOZZLE
A
B
60°
4
3
45°
6
3
60°
5
3
45°
8
4
60°
6
4
45°
10
5
SCALE µA DC
C
D
2 ÷ 3
6
2 ÷ 3
6
4
6
4
6
4
6
4
6
FLAME CONTROLLER
11 12
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