baltur TBML 120 ME, Installation, Use And Maintenance Instruction Manual

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ENGLISH
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DIESEL SUPPLY LINE
The following description covers the basic requirements to ensure
efficient operation.
The unit is equipped with a self-priming pump capable of sucking oil
directly from the tank also for the first fill-up.This statement is valid
only if the necessary conditions exist, see the pipe dimensioning
diagrams.
To ensure an efficient operation, it is better to make suction and
return pipes with welded fittings and to avoid the use of threaded
connections which often cause air infiltration’s interfering with the
pump operation and consequently with the burner.
Where a removable fitting is required, use the welded flange method
with a fuel resistant gasket inserted to ensure a perfect sealing.For
systems requiring pipes with a relatively small diameter, we
recommend using copper pipes.
For unavoidable connections we recommend using "biconic" fittings.
These are the diagrams of the different types of systems depending
on the position of the tank with respect to the burner.The suction pipe
should run up-slope towards the burner to avoid possible formation
of gas bubbles.Where more than one burner is installed in one boiler
room, it is essential that each burner has its own intake pipe.
Only return pipes can lead to a single manifold pipe with an adequate
cross section leading to the tank. Never connect the return pipe
directly to the intake pipe.
It is advisable to properly insulate the intake and return pipes to
prevent cooling which would affect the unit’s efficiency.Pipe diameters
(to be strictly complied with are listed in the following table.
The maximum amount of vacuum that the pump can withstand
noiselessly under normal operating conditions is 0.47 bar; if these
limit is exceeded normal pump operation will no longer be guaranteed.
Maximum pressure at intake and return = 1 bar.
AUXILIARY PUMP
In some cases (excessive distance or differences in level) the system
must be implemented with a "loop" supply circuit with an auxiliary
pump, avoiding to connect the burner pump directly to the tank.
In this case, the auxiliary pump can be started when the burner starts
and stopped when it stops.
The electric wiring of the auxiliary pump is made by connecting the
coil (230V) which controls the pump remote control switch to terminals
1 and 3 of the connector X26 on the equipment.
It is important to comply strictly with the previsions set forth here
below:
• The auxiliary pump must be installed as close as possible to the
liquid to be sucked.
• The head must be suitable for the relative plant.
• We recommend a flow rate that is at least equal to the flow rate of
the burner pump.
• Connection pipes should be sized to cope with the delivery rate of
the auxiliary pump.
• Absolutely avoid electrically connecting the auxiliary pump directly
to the contactor of the burner.
• Set the pressure to about 0.5 bar ÷ 1 bar if the circuit is fitted with
pressure regulator.