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6. ELECTRICAL CONNECTIONS
- They are delivered ready to be
connected.
CAUTION:
it is the installer’s
responsibility to perform the
connections in compliance with the
regulations in force in the country of
installation. Make sure that there is no
voltage at the line wire terminals before
connecting.
- Check that the data on the rating plate
corresponds to the rated line values.
- When carrying out connections make
sure that there is an efficient earth
circuit. The earth wire must be longer
than the live wires, and must be the
first wire to be connected when the
pump is being set up and the last to be
disconnected during disassembly.
- It is advisable to install a differential
switch. A thermal overload cutout in the
winding protects against voltage
overload in the single-phase pump
motors up to 1.5 KW.
- The three-phase motors must be
protected by the user.
- For three-phase motors the rotation
direction may be inverted; in this case
performance is much lower than the
rated values.
- The correct direction of rotation is
found by raising the water pump by its
handgrip: during starting a clockwise
reaction will be felt (contrary to the
direction of the arrow) to invert the
direction of rotation simply invert two
of the phases.
CAUTION:
Never poke fingers or other
objects into hole the pump casing near
the supporting feet to check the
direction of rotation.
- Repair of the pump by personnel not
authorized by the manufacturer will
render the guarantee null and void and
will entail operating dangerous
equipment.
CAUTION:
Any tampering may lead to
performance being reduced and
danger to persons and/or things.
- Where there is the risk of freezing,
empty the well or remove the pump
and store it in a suitable place.
7. PERIODICAL CONTROLS
- Before doing anything, make sure that
the pump is disconnected from the
power source and there is no possibility
of accidental connections.
- You are advised to check the following
periodically:
- Consult our services for replacement.
- The condition of the cables and
grommets, especially at their
attachment points.
- The impeller must not be
excessively worn, otherwise
performance will be reduced.
