Piusi V100, Инструкция по установке, использованию и техническому обслуживанию

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Installation, use and maintenance
ATTENTION Always use a tube with strength ≤ 1MΩ to avoid any electrostatic
charges.
ATTENTION It is the installer’s responsibility to use pipes with suitable
properties. The use of pipes that are not suitable for diesel could
cause damage to the pump or to persons, as well as causing
pollution. Loosening of the connections (threaded connections,
flanges, gasket seals) could cause serious ecological and safety
problems. Check all the connections aqer the first installation
and, subsequently, check on a daily basis. IF necessary, tighten
all the connections.
11.4 NOTES ON SUCTION AND DELIVERY LINES
11.4.1
DELIVERY
The selection of the pump model must be made taking into account the characteristics of
the system. The combination of the length of the pipe, the diameter of the pipe, the flow
rate of the diesel or other liquid, as well as the accessories installed on the line, could
create back pressure that are greater than the maximum predicted pressure, thereby
causing the pump’s electronic controls to intervene and reducing the dispensed flow
considerably. In these cases, to guarantee correct operation of the pump, it is necessary
to reduce the resistance of the system using pipes that are shorter or that have a greater
diameter, as well as line accessories with smaller resistances (e.g. an automatic dispensing
nozzle with greater flow rate capacity).
11.4.2 SUCTION
The Vantage pump is self-priming and characterized by good suction power.
During the start-up phase, when the suction pipe is empty and the pump is wet with the fluid, the electric
pump unit is able to suck liquid from a maximum vertical distance of 2m.
It is important to note that it could take up to 1 minute for the pump to prime and that the presence of an
automatic dispensing nozzle on the delivery side will prevent the air trapped during the installation from
being released and, therefore, the correct priming of the pump.
Therefore, it is always advisable to carry out the priming operations without an automatic dispen-
sing nozzle, checking that the pump is properly wet.
Always install a foot valve to prevent the suction pipe from being emptied and to keep the
pump wet at all times. In this way, the pump will always start up immediately the next times it
is used.
When the system is in operation, the pump can operate with back pressures of up to 0.5 bars on
the suction inlet; beyond this point, the pump may begin to cavitate resulting in a drop of the flow
rate and an increase in the noise levels of the system.
In light of this, it is important to guarantee small back pressures on the suction side, by using short pipes