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ELECTRICAL CONNECTION
Electric lines should be kept away from hot parts.
It is advisable for ali connections to be carried out with fl exible
electric wire, having a section that is adequate for available volta-
ge and power input.
IGNITION PREPARATION
Check that the nozzles fi tted are suitable for the power of the boi-
ler. The table shows the supply values of diesel oil in Kg/h accor-
ding to nozzle size and pump pressure (this is usually 12 bar for
the 1 st and 2nd fl ame).
Remember that 1 Kg of diesel oil is equal to about 10.200 Kcal).
When selecting nozzles (spray angle 60°) note that fuel feed at
the fi rst fl ame should not be much lower than minimum burner
capacity. Make sure that blast tube penetrates into the combu-
stion chamber as required by the boiler manufacturer. Make sure
that the tank return pipe is not obstructed, eg. by c10sed gates,
caps, etc ... Any obstructions would break the seal (Iocated on
the pump shaft) or the hose. Disconnect the 2nd fl ame thermo-
stat connection or “bridge”. Switch off the generai switch and the
boiler and safety thermostat in order to put into operation motor,
ignition transformer and after about 10” solenoid valve. When the
solenoid valve has been cut-in, expose the photoconductive celi to
a light source so that the burner does not stop in “blocked” state.
After the pipes have been fi lled (fuel oil discharged from 1 st fl ame
nozzle), stop the burner and put the photoconductive celi back
into its housing.
Note: It may be necessary to discharge air by loosening the pipe
fotting supplied with the pump (see fi gure). Do not Iight the pho-
toconductive celi before, the solenoid valve is switched on, othe-
rwise the equipment will be blocked.
IGNITION AND ADJUSTMENT
Using the 1 st fl ame air regulation screw, bring the air regulation
gate into a position which allows enough air fl ow in relation to the
fuel supplied to the fi rst fl ame. Disconnect the 2nd fl ame thermo-
stat connection or “bridge”.
Switch off the generai switch and the boiler and safety thermostat.
Wait for burner to ignite. With the 1 st fl ame of the burner ignited,
correct combustion air supply, if necessary.
Do this with the apprapriate screw and lock it by tightening the nut.
Flame colour should be Iight orange. After regulating, switch off
the burner and re-ignite it to check that ignition is correct.
Remember that for soft ignition air should normally be set strictly
to the required leve!.
If ignition is soft, disconnect the burner with the generai switch and
carry out direct connection (bridge) between the terminals of the
second fl ame thermostat.
Switch on the burner again ; it will restart operation with the fi rst
and second fl ame.
Use the second fl ame air regulation screw to get a light orange
fl ame. After regulating, tighten the lock nut.The burner is equipped
with a fl ame disc regulation screw. This device makes optimum
combustion possible by reducing or increasing air fl ow between
disk and blast tube.
For operation on low fuel supply it is usually necessary to reduce air
fl ow between disc and blast tube (turn the screw anti-c1ockwise).
Anti fl ow must instead be praportionatly increased (turn the screw
c1ockwise) when the burner operates at higher fuel supply.
After fl ame disc position has been adjusted, it is usually necessary
to correct the position of the 1 st and 2nd fl ame air regulation ga-
tes. Afterwards, check that ignition occurs correctly.
N.B. To make sure that combustion air is suffi cient in relation to
the quantity of fuel to be burnt; it is essential to check combu-
stion of the 1 st and 2nd fl ame. “Smoke” analysis instruments are
used for this purpose. Readings are taken of carbon dioxide (C0
2
)
percentage and smoke intensity BACHARACH scale).Obviously,
“smoke” semples for analysis are taken fram the pipe fi tting that
connects the boiler to the chimney. Carbon dioxide (C0
2
) level
must be within the range of 10% (minimum) and 13% (optimum)
with smoke intensity not exceeding 2 on the BACHARACH sca-
le. Note that any cracks, howover small, in the connecting pipe
between boiler and chimney can cause enough air to infi ltrate to
considerably falsify readings of carbon dioxide (C0
2
). It is there-
fore essential to check that this connection does not allow air to
infi ltrate.
FINAL CHECKS
Checks the following:
1 ) Burner stoppage by opening the thermostats;
2) “Blocking” by shading the photoconductive cell.
To unblock push the appropriate button.
MAINTENANCE
At the end of the heating season, it is usually advisable to clean
the fi lter, blast tube (disc, insulators, electrodes, nozzles), com-
bustion air passages and photoconductive celI. To clean nozzle
passages, use soft material (e.g. wood, plastic).
Replacement of nozzles every 12 months of operation is recom-
mended.
USE OF THE BURNER
The burner operates fully automatically, therefore it is non neces-
sary to carry out any kind at adjustment during its operation.
The “block” position is a safety position reached by the burner
automatically when some of the components of the burners or the
plant do not work properly.It is necessary to check then whether
the cause to the problem is a dangerous one before unblocking
the burner. The causes to the block may be temporary, for exam-
ple when air in inside the pipes. When it is unblocked, the burner
starts operating properly. If the burner stops three or fl our times at
a stretch, it is necessary either to look for the cause to the problem
and solve it or ask for the intervention of the after sales service.
The burner can remain in the “block” position without any limit
in time.In emergency cases it is advisable and to close the fuel
