Electrical Connections - baltur BT 40 DSN 4T Manual De Instrucciones Para La Instalación, El Uso Y El Mantenimiento

INSTRUCTIONS FOR PROPER INSTALLATION
Before proceeding with installation make sure that:
1) The flue (cross-section and height) corresponds to the regulations in force.
2) When refractory lining of the combustion chamber is necessary (where the boiler type so requires) you must
follow the boiler manufacturer's instructions to the letter.
3) The burner electricity supply must be connected up as illustrated in our diagram and on-burner electrical connec-
tions must be compatible with power supply voltage.
4) Fuel lines must be set up as illustrated in our diagrams.
5) The burner nozzle (or nozzles) must be compatible with the boiler output. Replace with others if necessary.
Under no circumstances must the fuel flow-rate be greater than the maximum required by the boiler or maxi-
mum admissible burner flow-rates. Bear in mind that the combustion head has been designed for nozzles with a
45° spray angle. Only in exceptional cases may nozzles of a different angle be fitted: in such cases make sure
that these differently-angled nozzles do not cause any problems (flame detachment, staining of diffuser disc
or combustion head, violent ignition, etc.).
6) Exercise caution during removal of the protective plastic nozzle plug: if the seal is compromised
(a slight scratch will damage it) the fuel could drip.
7) Make sure that the burner draught tube penetrates the combustion chamber as per the boiler manufacturer's
specifications.

ELECTRICAL CONNECTIONS

All connections must be carried out with flexible wiring.
Ensure there is always a safe gap between electrical wiring and any hot parts.
Make sure that the power line to which the unit will be connected has voltage/frequency ratings suitable for the
burner.
Make sure that the main line, the relative switch and fuses (indispensable) and any limiting device are able to
withstand the maximum current absorbed by the burner. For details see the burner-specific wiring diagrams.
FUEL PIPING
The explanation that follows exclusively bears in mind that which is necessary to ensure proper operation.
The unit is equipped with a self-priming pump able to draw the oil directly from the tank even on first filling.
This is true as long as there are the necessary conditions (see the table regarding horizontal and vertical distances
and the viscosity-temperature diagram). To ensure proper operation the piping (suction and return) is made with
welded couplings to eliminate the need for threaded joints which often bleed in air and consequently compromise
performance of the pump and therefore the burner too. Where detachable couplings are indispensable use the
welded flange system with an in-between fuel-resistant gasket to provide an excellent seal. For those systems
needing pipes of a relatively small diameter we recommend the use of copper pipes. In those unavoidable cou-
plings we recommend the use of "biconical" fittings. The enclosed tables show the general diagrams for various
unit types according to relative positioning of the tank and burner. Suction piping must run "uphill" towards the
burner to prevent any bubbles lodging in the pipe. Should more than one burner be installed in a single boiler room
each burner must be equipped with its own suction pipe. Only return pipes may link up in a single pipe designed
to reach the tank. Always avoid connecting the return pipe directly to the suction pipe.
It is always good practice to insulate the suction and return piping tp prevent damaging over-cooling. Pipe dia-
meters (which must be strictly adhered to) are given in the following tables.
is able to support while continuing to operate effectively and silently is 35 cm Hg. Should this limit be exceeded
proper pump performance cannot be guaranteed. Maximum suction and return pressure = 1 bar. When a fuel
oil with a viscosity in excess of the pumping limit (see diagram) is used it must be heated to a temperature that
allows it to flow through the piping.
In-tank preheating can be done with a steam-filled or hot water coil. The coil must be placed near the suction pipe
and in a position that always keeps it immerged even when the tank is down to its minimum level.
The extent of preheating is set by consulting the viscosity-temperature diagram. That is, the oil must be heated
until its viscosity rating is beneath the pumping limit threshold. Slight in-tank heating is always advantageous even
with fluid oils (5° E). In particular, if this preheating is effected via installation of a steam or hot water coil it will give
considerable savings on electricity consumption. In fact, the electrical elements in the burner must, in this case,
raise oil temperature only by that amount which corresponds to the difference between temperature on arrival at
the preheater and that at which it is atomized. It is, however, good practice with fluid oils (5° E at 50° C), to keep
in-tank preheating below 30 °C so as to prevent the formation of gas which might disturb pump performance.
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ENGLISH
The maximum vacuum the pump