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PREPARATIONS FOR START UP
Control that the nozzle (60° spray angle) applied is suitable for the boiler potentiality. The table shows the delivery
rates in kg/h of light oil with respect to the nozzle size and the pump pressure (normally 12 bar). It should be
remembered that 1 kg of light oil is equivalent to approximately 10.200 kcal). Make sure that the retum pipe in the
tank has no obstructions, e.g. gate valves, closed plugs etc. Any eventual obstruction would cause a breakage in
the sealing surface situated on the pump shaft. Close the main switch and the boiler thermostats in order to start
up the motor and the ignition transformer and, after approximately 10 seconds, the electric valve will cut in and
expose the photoresistant cell to a source of light until the burner stops (shut down). When the pipelines have
been filled up (and when fuel has come out of the nozzle), stop the burner and put the photoresistant cell back
in its seat.
Note:
Should it be necessary to purge air, this can be done by loosening the special fitting which the pump is
provided with (see 0002900480, 0002900680).
Do not illuminate the photoresistant cell before the electric
valve has cut in because, in this case, the control box will go to “shut down”.
STARTING UP AND REGULATION
By acting on the regulating cam of 1st flame (see drawings n° 0002932270, 0002932092, 0002900621) set the
1st flame air shutter to let in an amount of air deemed to be necessary for burner operation with 1st flame. Close
isolating switch and start the burner. With the burner running on 1st flame adjust, if necessary, the amount of
combustion air by acting on the regulating cam.
Stop the burner and then staff it again to be sure that ignition takes place correctly. Open isolating switch to stop
the burner and connect the terminals of the thermostat of 2nd flame. Now connect the burner again: it will staff with
1st and 2nd flame. With the burner running on 2nd flame adjust, if necessary, the amount of combustion air means
of the regulating cam. The burner is provided with a regulating cam of combustion head. Make the regulation so
as to obtain Co
2
from 10 to 13% with smoke number not exceeding 2 of Bacharach scale.
USE OF THE BURNER
The burner operates fully automatically, therefore it is non necessary to carry out any kind at adjustment during
its operating. 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
example when air in inside the pipes. When it is unblocked, the burner starts operating properly.
If the burner stops three or four times at a stretch, it is necessary either to loock for 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 to close the fuel valve, and disconnect the burner electrically.
MAINTENANCE
At the end of the heating season, it is usually advisable to clean the filter, blast tube (disc, insulators, electrodes,
nozzles), combustion air passages and photoconductive cell. To clean nozzle passages, use soft material
(e.g.wood,plastic). Replacement of nozzles every 12 months of operation is recommended.
SAFETY CHECKS
Checks the following:
1)
Burner stoppage by opening the thermostats;
2)
“Blocking” by shading the photoconductive cell.
To unblock push the appropriate button.
Summary of Contents for Spark 18 DSGW
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