Description Of Valve Operation - baltur TBL 45P Manual De Instrucciones

DESCRIPTION OF VALVE OPERATION

It is not recommended to select a too larger burner for the boiler
used for heating and producing domestic hot water, as the burner
can operate for long periods of time with only one stage, making
the boiler operate at a capacity that is lower than required; as a
result, the combustion products (smoke) exit at an excessively low
temperature (approx. 180° C for fuel oil and 130° C for diesel),
causing the creation of soot at the chimney outlet. Furthermore,
when the boiler operates at a capacity lower than what is indicated
in the technical data, it is very probable that acid condensate and
soot will form in the boiler, causing its rapid clogging and corrosion.
When the two flame burner is installed on a boiler for the production
of hot water for heating purposes, it must be connected so it can
operate under normal conditions with both flames, completely
stopping, without operating with one stage, when the predefined
temperature is reached. To obtain this operating condition, do not
install the second stage thermostat and make a direct connection
(bridge) between the respective equipment terminals. In this way,
only the burner's capacity will be used for ignition at a reduced
flow rate for a soft start, which is an essential condition for boilers
with a pressurized combustion chamber, but also very useful
for normal boilers (vacuum combustion chamber).
The burner's command (on or off) is connected to the normal
operating or safety thermostats.
Closing the main switch and the ON/OFF switch on the electric
panel for the DACA version (see 0002935510), the voltage reaches
the command and control equipment that starts to operate if the
thermostats are closed. This switches on the fan motor and the
ignition transformer.
The fan motor starts fan rotation, which performs a wash with air in
the combustion chamber and, at the same time, the pump makes
the fuel circulate in the pipes, expelling any gas bubbles through
the return line. This prewashing phase ends with the opening of the
safety solenoid valve and the 1st stage, making it possible for the
fuel to reach the 1st stage nozzle at a pressure of 12 bar and exit in
the combustion chamber finely atomized. As soon as the atomized
fuel exits the nozzle, it is set on fire by the spark present between
the electrodes since the start of the motor. During the ignition of the
first stage, the comburent air delivery is determined by the position
of the controlling hydraulic jack body (see 0002935420). If an air
regulation servomotor is used, see the 1st stage cam adjustment
drawing 0002935210.
If the flame appears in a normal manner, once the safety time
foreseen by the electric equipment has passed, it activates the
2nd stage solenoid valve (closed, in stand-by). If an air regulation
servomotor is used, see the 2st stage cam adjustment drawing
0002935210. The opening of the 2nd stage valve makes it possible
for the diesel to reach the second nozzle and, at the same time, the
combustion air regulation control piston to move downward, opening
EQUIPMENT FEATURES
Equipment
and relevant programmer
LMO44
the regulator even further. The piston stroke can be adjusted by
turning the screw with the lock nut. In this way the burner is fully
operational. Once the flame appears in the combustion chamber,
the burner is controlled and commanded by the photoresistors and
by the thermostats.
The command equipment continues the program and disconnects
the ignition transformer. When the temperature or pressure in
the boiler reaches the value to which the thermostat or pressure
switch is calibrated, its intervention will cause the burner to stop.
Subsequently, if the temperature of pressure decreases below the
lower thermostat or pressure switch threshold value, the burner
will switch on again. If for any reason the flame goes out during
operation, the photoresistor will intervene immediately (one second)
that will stop the feed from the corresponding relay and automatically
disengage the solenoid valves that cut off the flow to the nozzles.
The ignition phase is repeated in this manner and, if the flame
reignites normally, the burner will return to normal operations.
Otherwise (irregular flame or no flame), the equipment will shut
down automatically.
If the program is interrupted (power failure, manual intervention,
thermostat intervention, etc...) during the prewashing phase the
programmer will return to its initial position and will automatically
repeat the entire burner ignition phase.
Safety Time Pre-ventilation and washing
in seconds in seconds
5
12 / 28
0006081349_201307
The LMO44 device goes into lock-out after three repetitions
of the ignition cycle.
The selection of the nozzles in function of the desired total
flow rate (2 nozzles in operation) must be made accounting
for the flow rate values that correspond to the diesel operating
pressure of 12 bar. It is possible to vary widely the ratio
between the first and second stage by replacing the nozzles.
Post-ignition Time
in seconds
25 5
Time between 1st e
2nd stagein seconds
5