Conditions For Correct Installation; Electrical Connections - baltur BT 40 DSN 4T Manual De Instrucciones

CONDITIONS FOR CORRECT
INSTALLATION
Before installation, make sure that:
• The chimney (section and height) is compliant with the requirements
of the relevant laws.
• When it is necessary to cover the combustion chamber with refractory
material (if the boiler type requires it), perform this operation by following
the instructions provided by the boiler manufacturer.
• The burner power supply line must be made according to the wiring
diagram provided by us and any electrical connections on the burner
must be suitable for the power supply voltage.
• Fuel pipes must be laid out according to our diagrams.
• The nozzle or nozzles fitted on the burner must be suitable for the
boiler capacity. If necessary, replace them with suitable ones. In no
case should the quantity of fuel delivered exceed the maximum amount
required by the boiler and the maximum amount allowed for the burner.
Remember that the combustion head is designed for nozzles with 45°
spray angle. Only in special cases can nozzles with a different spray
angle be used. In these cases, however, make sure that the nozzle
with a different spray angle will not cause problems (blowoff, disk or
combustion head fouling, violent ignition, etc.).
• When removing the protective plastic cap from the nozzle seat be careful
because if the sealing surface is indented (a slight scoring would be
enough) it will cause fuel dripping.
• Make sure that the burner head enters the combustion chamber
according to the boiler manufacturer's instructions.

ELECTRICAL CONNECTIONS

It is advisable to make all connections with flexible electric wire.
Power lines must be at a suitable distance from hot parts. Check that the
power line to which the device is connected is powered with voltage values
and frequency suitable for the burner. Make sure that the main line, the
relevant switch with fuses (essential) and the limiter, if present, are suitable
to stand the maximum current absorbed by the burner. For more details,
see the relevant wiring diagrams for each single burner.
FUEL PIPES
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 only valid if the required conditions exist (refer to
the table of distances and differences in levels and the viscosity -
temperature diagram). To ensure efficient operation, it is preferable
to make intake and return pipes with welded fittings and to avoid the
use of threaded connections which often cause air infiltrations and
disturb pump operation and consequently burner operation. 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 attached tables show diagrams of the different types of systems
depending on the position of the tank with respect to the burner.
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 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 tables. The maximum amount of vacuum
that the pump can withstand when operating regularly and silently
is 35 cm Hg; if this limit is exceeded, normal pump operation can
no longer be guaranteed.
Maximum pressure at intake and return = 1 bar. When the viscosity
of the fuel oil to be used exceeds the pumping limit, (see diagram)
it is necessary to heat the oil in order to ensure that it flows through
the pipes. Pre-heating in the tank can be carried out with a steam
coil or with a hot water coil. The coil should be fitted near the intake
pipe and must always be immersed even when the tank is at the
minimum level. The extent of pre-heating should be decided after
consulting the viscosity temperature diagram. The oil should be
heated until its viscosity rate is lower than the value defined as the
pumping limit. However, a slight pre-heating in the tank is always
advantageous even when using light oil (5° E). In particular, if pre-
heating is carried out with a steam or hot water coil, a considerable
saving in electricity can be made; in fact; the electrical resistances
installed in the burner only need to increase the oil temperature by
an amount that corresponds to the difference between the arrival
temperature at the pre-heater and the temperature at which the oil
becomes atomized. However, to avoid the formation of gas which
would disturb pump operation, pre-heating in the tank with light oil
(5° E at 50° C) should not exceed 30° C.
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