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0006081544_201907
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.
The basic diagrams for the different system types depending
on the position of the tank with respect to the burner are shown
below.The intake pipe should run up-slope towards the burner
to avoid the possible build-up 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. Avoid at all costs
connecting directly the return pipe on 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
tables.
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 suction and return pressure = 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 in
parallel to the motor-fan remote switch coil.
Always follow the instructions 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 equal at least to that of the burner
pump.
•
The connection pipes must be dimensioned based on the flow
rate of the auxiliary pump.
•
Avoid electrically connecting the auxiliary pump directly to the
remote control switch of the burner.
•
Adjust the pressure at approx. 0.5 - 1 bar, if the circuit is
equipped with a pressure regulator.
Содержание TBML 200 MC
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