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0006081053 - ed 2006/12
WORKING FIELD
The working fi elds are obtained from test boilers corresponding to the standard EN267 and are indicatively for the combina-
tion burner-boiler.
For correct working of the burner the size of the combustion chamber must correspond to current regulations; if not the ma-
nufacturers must be consulted.
TBL 85P - TBL 105P - TBL 160P BISTADIO
FUEL PIPE
The following description covers
merely the basic requirements for
an effi cient operation.
The unit is equipped with a self-
suction pump, capable of sucking
oil directly from the tank also for the
fi rst fi ll-up.
This statement holds only if the
required conditions exist (refer to
table of distances and difference
in levels). To ensure an efficient
operation, it is better to make suction
and return pipes with welded fi ttings
and to avoid the use of threaded
connections which often cause air
infi ltration’s interfering with the pump
operation and consequently with the
burner. Where a removable fi tting
is required, use the welded fl ange
method inserting a fuel resistant
gasket to obtain a positive sealing.
For systems requiring pipes with
a relatively small diameter we
recommend the use of copper
pipes. For unavoidable joints we
recommend the use of biconic
fi ttings.
The annexed tables show the
indicative diagrams for the different
types of systems depending on the
position of the tank in respect to the
burner.
The suction pipe should run up-
slope towards the burner to avoid
possible formation of gas bubbles.
Where more burners are installed in
one boiler room, it is essential that
every burner has its own suction
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 suction pipe.
pipe directly to the suction pipe.
It is a good practice to properly
heat-insulate the suction and return
pipes to prevent cooling with would
otherwise affect the unit effi ciency.
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 35 cm.Hg. ; if these limit
is exceeded normal pump operation
will no longer be guaranteed.
Maximum suction and return
pressure = 1 bar.
