baltur 56470010, Инструкция по установке, использованию и обслуживанию

Страница: 61 / 88

ENGLISH
17 / 42
0006160060_201802
DIESEL SUPPLY LINE
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 an efficient operation, it is better to install intake 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 coupling is required, use the welded flange
method inserting a fuel resistant gasket to obtain positive sealing.
For systems requiring pipes with a relatively small diameter, we
recommend using copper pipes.
For unavoidable connections we recommend using "biconic" fittings.
The annexed tables show the indicative diagrams for the different
types of systems depending on the position of the tank with respect
to the burner.
The suction pipe should run up-slope towards the burner to avoid
possible formation 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 manifold pipe with an adequate
cross section leading to the tank.
Never connect the return pipe directly to the intake pipe.
It is a good practice to properly heat-insulate the intake 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 when
operating regularly and silently is 35 cm Hg. If this limit is exceeded,
normal pump operation can no longer be guaranteed.
Maximum intake and return pressure = 1 bar
AUXILIARY PUMP
In some cases (excessive distance or differences in level) the system
must be implemented with a "loop" supply circuit with an auxiliary
pump, avoiding to connect the burner pump directly to the tank.
In this case, the auxiliary pump can be started when the burner starts
and stopped when it stops.
The electric wiring of the auxiliary pump is made by connecting the
coil (230V) which controls the pump remote control switch in parallel
to the motor-fan remote switch coil.
It is important to comply strictly with the previsions set forth here
below:
• The auxiliary pump must be installed as close as possible to the
liquid to be sucked.
• The head must be suitable for the relative plant.
• We recommend a flow rate that is at least equal to the flow rate of
the burner pump.
• Connection pipes should be sized to cope with the delivery rate of
the auxiliary pump.
• Absolutely avoid electrically connecting the auxiliary pump directly
to the contactor of the burner.
0002904150
A
B
1 Foot valve
2 Air regulation servomotor
3 2nd flame nozzle
4 1st flame nozzle
5 Normally closed safety valve
6 Pump (12 bar)
7 Normally closed valve