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ELECTRICAL CONNECTIONS
Electrical lines must be placed at an adequate distance from hot parts.
We advise you to carry out all connections by using flexible electrical wire, with a section suitable for the
available voltage and absorbed power.
EQUIPMENT SPECIFICATIONS
Equipment and
relative
programmer
LFL 1.333
Cyclic relay
Safety time
in seconds
3
Pre-ventilation
time and oil Pre-
circulation
31,5
Pre-starting
in seconds
6
Post-starting
in second
3
Time between
1st flame and
2nd flame
in seconds
12
FURTHER DETAILS ON MIXED BURNER STARTING
We advise you to start the burner first with liquid fuel, since delivery is, in that case, determined by the nozzle (or
nozzles) used, while you can change methane delivery as you want by acting on the relative flow regulator.
SETTING OF LIGHT OIL STARTING
Be sure that the nozzles used are proportionate to boiler power.
The table shows light oil delivery values in Kg/h related to the nozzle size and pump pressure (usually 16 bar for second
flame). Remember that 1 kg of light oil is equivalent to about 10.200 kcal.
When you choose nozzles (spray angle at 45°) take into account that fuel delivery on first flame must not be considerably
lower than the lowest flow rate of the burner (see burner plate).
Be sure that the combustion mouth enters the furnace as required by the boiler manufacturer.
Be sure that the return pipe to the tank has no occlusion, gate valves are closed and so on.
Any obstacle would break the sealing member placed on the pump shaft or on the hose.
Turn on the cut-off device/s on the suction pipe.
Exclude the connection or “bridge” to the second flame thermostat.
Turn on the air purging device installed on the pump.
Turn on the main switch (the switch on the burner must stay at “O” = off) the pump motor relay by hand in order to check
the correct direction of rotation.
If necessary, exchange the two wires in the output main line of the relay for inverting the direction of rotation in the motor.
Connect again the pump motor relay by hand for starting the pump and suck in light oil from the tank. When you see
light oil coming out from the air purging device, stop the motor and turn off the air purging device.
The burner is now ready for light oil running.
LIGHT OIL STARTING AND REGULATION
1)
Be sure that motors (fan and pump) are rotating in the right direction.
2)
Be sure that combustion products can be blown off without any problem (open flue damper) and the boiler is not
without water.
3)
Adjust the combustion air regulator to the amount you presumably need (see BT 8653/1) and open the air way
between head and disk by one third.
Disconnect the second flame thermostat and give current to the burner by turning on the main switch and the
burner switch (light oil position). The burner is therefore connected and it carries out preventilation phase.
If the air pressure control device detects that pressure is higher than the regulated value, the starting transformer
will be turned on, followed by the first flame light oil valve, then the burner will
start.
