Operating Description - baltur BT 17N Instruction Manual For Installation, Use And Maintenance

ENGLISH

OPERATING DESCRIPTION

The burner operates fully automatically: it is activated by switching
on the main switch and the control panel switch.
The burner operation is managed through a command and control
system
The "lock-out" position is a safety position.
The burner reaches the lock-out position automatically when some
of its components or system components are inefficient.
Make sure that there are no faults in the heating plant before
unlocking the burner.
The burner may stay in the lock position without any time limits.
Lock-outs may be caused by temporary faults (small quantities
of water in the fuel, air in the pipes, etc.). In these cases if it is
released, the burner will start up without any difficulties.
In the event of repetitive lock-outs, please contact the local service.
Close the switch on the burner to activate the remote control of the
heating elements controlled by the thermostat.
The thermostat prevents fuel oil from boiling when the appliance is
not in operation and wasting electricity.
When the temperature of the fuel oil reaches the value set on the
minimum thermostat, the burner will be started controlled by the
equipment.
The fan motor is switched on at the same time as the ignition
transformer.
The fan motor performs the pre-ventilation with air in the combustion
chamber, at the same time the pump activates the hot oil circulation
through the pipes expelling the cold oil and any gas bubble through
the return pipe.
This pre-ventilation and pre-washing stage lasts 30 seconds and
ends when the solenoid valve closes (it is open in the resting
position), interrupting free release of oil to the tank.
The closure of the solenoid valve causes the pressure in the
delivery pipes to increase.
When the pressure reaches 12.5 bar it opens the mechanical valve
that is located in the spray nozzle unit and the fuel oil reaches the
nozzle and exits finely sprayed into the combustion chamber.
The pressure is stabilised at approx. 22 bar, because the pump
pressure regulator is calibrated at this value.
As soon as the atomised fuel oil exits the nozzle, it is set on fire by
the electrode's spark already present when the motor starts.
If the flame appears, the burner will no longer be in "lockout"
position and the ignition transformer will be disabled.
Since the flame appears in the combustion chamber, the burner is
controlled by photoresistors and thermostats.
During burner operation the heating elements are turned on or off by the
adjustment thermostat, as required through the turning on of the yellow
light on the burner electric panel.
When the temperature or pressure in the boiler reaches the value to
which the thermostat or pressure switch is calibrated, the burner stops.
The equipment returns to automatic operation when the temperature or
pressure has decreased sufficiently.
If the program is interrupted, due to a power supply failure, manual
action or the intervention of the thermostat, during the pre-wash stage,
the programmer returns to its starting position and automatically repeats
the entire burner ignition sequence.
The ignition phase is repeated in this manner and, if the flame reignites
normally, the burner will return to normal operation. Otherwise the
equipment will shut-down automatically.
If for any reason the flame goes off during the operation, the flame
detector will be triggered automatically and stop the equipment.
As soon as the pressure drops below 12.5 bar, the atomised sprayed
oil is detected by the automatic closure of the mechanical valve of the
spray nozzle unit.
If for any reason the flame goes off during the operation, the flame
detector will be triggered automatically and stop the equipment.
To measure the effective pressure at the spray nozzle unit and therefore
at the nozzles, we recommend connecting the pressure gauge to the
tank filter connection .
IMPORTANT
The choice of nozzle must be made on the basis of the flow rate
values corresponding to an operating pressure of 20 bar with
load loss (∆p = 2 bar) due to the gas valve installed on the pre-
heater filter.
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