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STARTING UP AND REGULATION
Before starting up, make sure that:
•
Check that the nozzles fitted on the burner are suitable for the
boiler capacity. If necessary, replace them with suitable ones.
•
Make sure that the mains voltage corresponds to the manufactu-
rer's requirements and that all electrical connections made at the
installation site are effected properly as illustrated in our wiring
diagram.
•
Make sure that the combustion products may be freely vented
through the boiler and flue dampers.
•
Check that there is water in the boiler and that the gate valves of
the system are open.
•
Make sure that there is fuel in the tank.
•
Check that all the gate valves fitted on the fuel suction and
return pipes are open; the same applies to any other fuel shut-off
devices.
•
Avoid second stage operation. Set the switch on the electrical
panel to the first stage position. If the burner does not have the
first and second stage switch, disconnect the thermostat to avoid
activating the second stage, if installed.
•
Slightly open the air regulator and let in an amount of air deemed
necessary for burner operation with the 1st stage and lock it in
this position.
•
Set the air adjustment device on the combustion head in an
intermediate position.(refer to the chapter Air regulation on the
combustion head).
•
Turn on the main switch and the one on the control panel, (S1), if
provided.
•
The programmer starts executing the preset program, activating
the devices comprising the burner.
•
The equipment will start as described in the chapter "OPERA-
TION DESCRIPTION".
•
With the burner operating in the first stage, adjust now the amount
of air necessary for ensuring efficient combustion.
•
We recommend keeping the air quantity at a low level when
working in the first stage output to ensure perfect ignition even in
the most difficult conditions.
•
After adjusting the first stage air, disconnecting the current from
the main switch, close the electric circuit commanding the second
stage activation and move the switch on the electrical panel to
second stage.
•
If the electrical panel does not have the first and second stage
switch, connect the terminals of the 2nd stage thermostat with
each other on the boiler terminal block.
•
Working on the screw limiting pin stroke for the models with
hydraulic jack (0002935420), or on the second stage air regu-
lation cam for the models with servomotor (0002935210), set
the second stage air damper opening at the position considered
suitable for the desired fuel delivery.
•
Now the equipment is activated again and will automatically
switch to the second stage according to the program set by the
programmer.
•
Regulate the air quantity to ensure a good combustion.
•
Check combustion with special instruments.
•
If the appropriate instruments are not available, judgement can be
based on the colour of the flame.
•
Regulate to obtain a light orange flame avoiding a red flame with
smoke, or a white flame with air excess.
•
Air regulation should be performed to allow a certain amount of
carbon dioxide (CO2) in the fumes, which may vary from a min. of
10% to a max. of 13% with a fume index not exceeding 6 of the
Bacharach scale.
CAUTION / WARNINGS
With a hydraulic jack,
When switching on the burner for the first time, shut downs may
be experienced during the transition from the first to the second
stage, due to the presence of air in the jack circuit.
Slightly loosen the nut blocking the jack pipe, carry out a few
operating cycles until there is fuel discharge from jack connection
nut.
Tighten the nut when the operation is finished.
The burner is equipped with a flame disk adjusting screw which optimi-
ses combustion by decreasing or increasing the air flow between the
disk and the head.
Correct, if necessary, the combustion air delivery by acting on the in-
take damper and the position of the flame disk adjustable by means of
the screw (B).
When the burner is running with reduced fuel delivery, decrease the air
flow between disk and head by undoing the adjusting screw. Tighten
the screw to increase air flow in the event of larger delivery.
After modifying the position of the flame disk it is necessary to correct
the air damper positions and afterwards check for proper ignition.
26 / 44
0006081053_202301
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