Baltur BT 350 DSG Manual User Instructions - Electrical Connections
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ELECTRICAL CONNECTIONS
The electrical connections to the burner are minimal. It is advisable
to make all electrical connections with flexible electrical wire. Electric
lines should be at an adequate distance from hot parts.
Make sure that the power line to which the unit will be connected,
has frequency and voltage suitable for the burner. Make sure that
the main power line, the relative fuse-equipped switch (essential)
and any limiter are capable of withstanding the maximum current
absorbed by the burner.
For details see the specific wiring diagrams for each individual
burner.
FUEL PIPELINES (DIESEL)
The following description covers merely the basic requirements
for an efficient operation. The unit is equipped with a self-suction
pump, capable of drawing 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 install suction and return pipes
with welded fittings and to avoid the use of threaded connections
which often cause air infiltration interfering with 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 prevent
possible formation of gas bubbles. Where several burners are
installed in one boiler room, it is essential for every burner to have 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
which 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 this 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 difference in level) it is
necessary to install a “loop-type” supply system with an auxiliary
pump, thus avoiding the burner pump from being directly connected
to the tank.
In this case the auxiliary pump can be put into operation when the
burner is started up and cut-off when the it stops.
The electric wiring of the auxiliary pump is made by connecting
the coil (230 V) which controls the pump remote control switch of
the pump to the terminals “N” (equipment terminal board) and “R”
(downstream the motor remote control switch).
It is important to strictly comply with the provisions set forth below:
- The auxiliary pump should be installed as near as possible to
the fuel to be sucked.
- The head should meet the requirements of the system used.
- We recommend a delivery rate equal at least to that of the
burner pump.
- Connection pipes should be sized to cope with the delivery rate
of the auxiliary pump.
- Avoid electrically connecting the auxiliary pump directly to the
remote control switch of the
burner motor.