Ensure that the mains voltage is the same as the value shown on the motor plate and that
there is the possibility of
MAKING A GOOD EARTH CONNECTION (Fig. E)
, in particular
the earth terminal must be connected to the yellow/green lead of the power cable. The
earth lead used must be longer than the phase leads so that it does not disconnect first
when subject to traction.
2.2
In fixed installations, International Safety Standards require the use of isolating switches
with a fuse-carrier base.
2.3
In normal operation, the pump does not require any specific maintenance.
However, it may be necessary to clean the hydraulic parts when a fall in yield is
observed. The electropump must not be dismantled unless by skilled personnel
in possession of the qualifications required by the regulations in force. In any
case, all repairs and maintenance jobs must be carried out only after having
disconnected the pump from the power mains.
3. STARTING UP
4. PRECAUTIONS
5. MAINTENANCE AND CLEANING
Single-phase motors are provided with built-in thermal overload protection and may be
connected directly to the mains.Three-phase motors must be protected with an automatic
switch (e.g. overload protection) set at the values on the electropump data plate, or with
fuses of the size indicated in chapter 4.
2.4
Switch on the power and check, on the three-phase version, that the motor is turning in
the correct direction; this should be in a clockwise direction, looking at the motor from the
impeller side.
Fig. G
If it is turning in the wrong direction, invert the connections of any
two wires on the terminal board, after having disconnected the pump from the power
mains.
The electropump should not be started more than 20 times in one hour so as not to
subject the motor to excessive thermal shock.
4.1
DANGER OF FROST: When the pump remains inactive for a long time at temperatures
of less than 0°C, the pump body must be completely emptied through the drain cap Fig.
H, to prevent possible cracking of the hydraulic components. This operation is advisable
even in the event of prolonged inactivity at normal temperature.
4.2
When starting after long periods of inactivity, the starting-up operations listed above must
be repeated.
4.3
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