Baltur BT 350 DSG Manual User Instructions - Operation Description
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1 - Main tank
2 - Filter
3 - Circulation pumps
4 - Water outlet and system
5 - Air/gas outlet usually closed
6 - Degasifier and combustion recovery tank
7 - Non-return valve
8 - By pass (usually closed)
The oil recovery tanks (diameter ~ 150 - height ~ 400) should be
installed as near as possible to the burner and should be about
0,5 m higher with respect to the burner’s pump.
FEED SYSTEM HYDRAULIC DIAGRAM FOR SEVERAL DIESEL FUEL OR HEAVY OIL BURNERS WITH
MAXIMUM NOMINAL VISCOSITY (5 °E at 50 °C)
TO
TH
E
BU
RN
ER
TO
TH
E
BU
RN
ER
TO
TH
E
BU
RN
ER
OPERATION DESCRIPTION
Turning on the switch on the equipment, if the regulation and safety
thermostats allow it, the current reaches the control electrical
equipment that starts the motor and the ignition transformer.
The motor turns the fan that carries out the pre-ventilation with the
combustion chamber air. At the same time, the operation of the
pump causes the diesel to circulate inside the ducts expelling any
gas bubbles through the return valve. During the pre-ventilation
phase the motor that activates the combustion air shutter opens it
in the second flame position (pre-ventilation with air open). Then,
the air shutter is returned to the first flame position for ignition. This
"pre-wash" stage ends when the solenoid valve “1” (open in standby
position) closes stopping the flow of the diesel towards the tank.
As the solenoid valve “1” closes, the pressure inside the delivery
ducts increases.
When the diesel pressure reaches 7 bar, it opens the mechanical
valve located in the atomiser unit. Therefore, the diesel reaches the
first flame nozzle and and from this it enters into the combustion
chamber finely atomised. The pressure stabilises at a value of
approx. 10 bar since the first flame pressure regulator is adjusted
to this value.
The atomised diesel comes out of the nozzle and is ignited by the
charge of the electrodes that has generated upon motor start up. If
the flame appears regularly, the programmer gets past the lock-out
position and activates the motor that controls the combustion air
shutter taking it to the second flame position.
During this operation an adjustable cam activated by the same
shutter motor, closes an electric contact that supplies current to the
solenoid valve “2” that intercepts the diesel flow through the first
flame pressure regulator.
The first flame pressure regulator is therefore excluded and the
pressure increases up to the value at which the pressure regulator
incorporated in the pump (16 bar) is set.
The 16 bar pressure has also an effect on the mechanical valve that
up to a pressure of 13 bar prevents the fuel from flowing toward the
second nozzle. Therefore, the valve is opened by the pressure and
the second nozzle starts working. The 16 bar pressure has now
effect on the two nozzles.
When the equipment works at 16 bar, it is at its maximum capacity.
Note: It is clear from the above that the choice of nozzles, depending
on the total capacity (2 nozzles working) required, must be made
taking into account the capacity corresponding to the working