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ENGLISH
ELECTRIC WIRING
The electric connections to the burner are minimal. It is advisable to make all the connections with flexible electric
wire.
Electric lines should be at an adequate distance from hot parts. Make sure that the electric line to which the unit will
be connected, has frequency and voltage suitable for the burner. Make sure that the main line, the relevant switch
with fuses (essential) and the current limiter (if required) are capable of withstanding the maximum current absorbed
by the burner. For details refer to the specific electric diagrams for every burner.
FUEL PIPE
The following description covers merely the basic requirements for an efficient operation.
The unit is equipped with a self-suction pump, capable of sucking oil directly from the tank also for the first fill-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 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 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 fittings.
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.
It is a good practice to properly heat-insulate the suction and return pipes to prevent cooling with would otherwise
affect the unit 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 35
cm.Hg. ; if these limit is exceeded normal pump operation will no longer be guaranteed.
Maximum suction and return pressure = 1 bar.
