First Filling Up Of Pipelines - Description Of Operation; Description Of Operation - baltur BT 40 DSN 4T Manual De Instrucciones

FIRST FILLING UP OF PIPELINES
After checking that the protective plastic caps inside the pump fittings
have been removed, proceed as follows:
• Put the switch on the burner in the "0" position. This operation
prevents the automatic connection of the burner and of the
resistances which could burn if operating with an empty tank.
• If the burner is three-phase, make sure that the motor rotates
in an anti-clockwise direction, by observing the burner from
the pump side. This can be checked by looking at the sense of
rotation of the fan through the spy hole situated on the back of
the scroll. To start up the motor, close the remote control switch
manually (by pressing on the mobile part) for a few seconds
and watch the sense of rotation of the fan. If it is necessary to
change the sense of rotation, invert two phases of the line input
terminals (L1 - L2 - L3).
Wait until the fan is moving very slowly before
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t r y i n g t o a s c e r t a i n t h e s e n s e o f d i r e c t i o n :
it is possible to misinterpret it.
• Detach, if already attached, the flexible hoses from the intake
and return pipes.
• Dip the end of the flexible intake hose in a tin containing either
lubricant or fuel oil (do not use low-viscosity products such as
light oil, crude oil, petrol, kerosene, etc.).
• Now press on the mobile part of the motor remote control switch
in order to start up the motor and therefore the pump. Wait until
the pump has sucked in an amount of lubricant equal to 1 or 2
glassfuls, then stop. This operation will prevent the pump from
operating dry and will increase the suction power.
• On burners with separate pump motor, press on the dedicated
remote control switch to load the pump.
Pumps must not operate dry, otherwise they will jam (seizure)
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within a short time.
• Attach the flexible hose to the intake pipe and open any gate
valves fitted on this pipe and any other shut-off element on the
fuel pipes.
• Press again on the mobile part of the fan motor or pump motor
remote control switch to start the pump, which will suck fuel from
the tank. When fuel is seen coming out of the return pipe (not
yet connected), release the remote control switch.
If the pipeline is very long, it may be necessary to bleed air
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through the dedicated plug. If the pump is not equipped with
this plug, remove the pressure gauge connection plug. When
fuel is seen coming out, stop the operation and replace the
plug. Now resume the filling operation until the tank is full.
The pre-heater tank is full when fuel is seen coming out of
the flexible return hose, not yet connected.
• Connect the flexible return hose to the pipe and open any gate
valves fitted on this pipe. The burner is now ready to start up.

DESCRIPTION OF OPERATION

• Version "D" (dense) burners are supplied with an auxiliary
heating element kit for the pump, for the spray nozzle unit
solenoid valves and line filter. Closing the burner switch,
the heating element remote control switch is activated (if
the relative thermostat permits it). The voltage reaches the
heating element remote control switch through the regulation
thermostat contact. When the heating elements are turned on in
this manner they heat the fuel oil in the pre-heater tank. When
the oil temperature reaches a sufficient value, the minimum
thermostat is closed and, if the other thermostats (regulation
and safety) permit it, the current arrives to the equipment
that turns on the burner devices according to the predefined
program. The ignition transformer is switched on together
with the burner motor when the OR 3/B equipment is used.
With the LAL 1.25 equipment the transformer is switched
on after a few seconds. The motor starts fan rotation, which
pre-ventilates with air in the combustion chamber and, at the
same time, the pump makes the hot oil circulate in the pipes,
expelling the cold oil and any gas through the return line.
This "pre-washing" and "pre-ventilation" phase ends with the
closure of solenoid valve "7" (open in the stand-by phase) that
stops the free release of the oil towards the tank. The closure
of the solenoid valve causes the pressure in the delivery pipes
to increase.
• The pre-heater mesh filters have a spring valve (gas) that opens
permitting the fuel to flow only when a pressure of approx.
2 - 2.5 bar is reached. The purpose of this valve is to keep the
pre-heater under slight pressure even when the burner is off,
in order to reduce, and prevent if possible, the formation of gas
with hot oil and the burner off. The loss of pressure due to this
gas valve is approx. 2 - 2.5 bar and therefore the atomization
pressure should be adjusted (pump pressure) to a higher
pressure to compensate for the pressure loss. In practice,
the pump pressure must be regulated to 27 bar. When the
pressure reaches 16 bar, the nozzle closing device (4) located
on the spray nozzle unit opens, permitting the oil to reach the
1st stage nozzle and, from there, to exit to the combustion
chamber finely atomized. The pressure is stabilized at approx.
27 bar, because the pump pressure regulator is calibrated at
this value. As soon as the atomized oil exits the nozzle, it is set
on fire by the electrode's spark already present. During the first
stage ignition, the air gate is kept in the adjusted position by
the servomotor, based on the quantity of burnt fuel. If the flame
appears normally, it exceeds the lock position, disengages the
ignition transformer and engages the 2nd stage solenoid valve
"8"(closed in stand-by). The opening of the 2nd stage valve
makes it possible for the fuel, at a pressure of 25 bar, to reach
the 2nd stage nozzle closing device no. 4/1. The pressure of
27 - 2 = 25 bar acts on the 2nd stage nozzle closing device that,
up to a pressure of 16 bar, prevents the fuel from flowing to the
second nozzle. This device is therefore opened by the pressure
and also the second nozzle will start to operate. The pressure
of 25 bar now acts on two nozzles. 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 (0002932230pagina 15).
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