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    Where can I get the EC Declaration of Conformity?

    All ESPA products have all necessary documents inside the packaging, along with the instruction manual.

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    How can I choose a pump for a filtration unit in a home swimming pool?

    A/  If you already have a filter, you should choose a pump with a flow that does not exceed the maximum filtering capacity at the recommended filtering speed.

    B/ We can take as a reference the water circulation of all the water during 6 hours. The pool capacity (m3) has to be divided by 6 (h) to get the flow in m3 at the filter's operating pressure. Consult local regulations, which may vary according to the region where the filter has been installed and its technical specifications.

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    What is the correct inflation pressure for a hydropneumatic accumulator?

    The air pressure in a membrane accumulator installed in a pressure unit must be 0.2-0.5 bar lower than the start-up pressure of the pump. These values must be measured with the installation depressurised and at least once every 6 months.

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    What is ATEX?

    The term ATEX (from the French for explosive atmospheres: ATmosphères EXplosives) is used to refer to European Directive 94/9/EC. This directive regulates machine safety in explosive atmospheres. The directive also regulates non-electric elements, such as pumps, reducer gears, etc. It came into force in July 2003, and since then every machine working in an ATEX area has had to comply with the directive.

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    Can the stopping pressure be adjusted in Kit 05, Kit 02 or TECNOPRES?

    No, they always stop at the maximum pressure of the selected pump.
    Kit 05 allows the starting pressure to be set between 1.5 and 2.5 bar

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    When should I choose a grinding pump for wastewater?

    Grinding pumps are recommended in only 2 cases:
     1/ When the delivery height prevents you from using a model with a large enough solid passage.
     2/ When building constraints prevent you from installing a delivery pipe with an inner diameter that is larger than the solid passage of the wastewater pumps.

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    How does a variable frequency drive work?

    Variable frequency drives applied to pump systems for stepping up pressure are capable of reading the pressure of a discharge line in real time in order to adapt the motor speed and the hydraulic performance of the pump to a preset figure using hydraulic algorithms. The operation consists of taking a pressure reading using an analogue sensor which translates the pressure in the installation into an electric signal between 4 and 20 mA in real time. This signal is interpreted by the variable frequency drive, which uses a PID (Proportional-Integral-Derivative) system to modify the pump motor speed, making sure that its performance adapts to the requirements previously defined by the user.  

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    What are the advantages of a variable frequency drive?

    Variable frequency drives applied to pumping systems to boost pressure are normally used for controlling the water supply pressure, obtaining the following advantages:
    The pressure provided by the pumping equipment is kept constant, regardless of variations in demand occurring in the installation. This results in greater convenience for the user.
    As the motor’s revolutions are adapted to demand, the power absorbed by the motor is reduced, excess pressure is minimised and, as a result, the sets are more energy efficient.
    The reduction in motor revolutions minimises noise levels from the sets.
    The pumping sets can do without large pressure accumulators and only small boilers are needed for the system to work properly. The sets are smaller and more compact.
    Accumulator maintenance is also reduced by avoiding the stresses produced by the pressure differences. The pressure differences in sets provided with variable frequency drives are minimal when working at constant pressure.


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