Pump Operation; Control Devices - Della Toffola S/P Instrucciones Originales

3

PUMP OPERATION

3.1 PUMP OPERATION
The running direction of the pump determines the inlet and the outlet hole. The
pump can work in both directions and therefore a direction change and the
reversing of it is always possible, even during the working operation (for
example in case of exceeded liquid or emptying a piping circuit). After
starting the pump it takes a few seconds for the self priming suction to occur.
In case the liquid is not sucked try to reverse the running direction or check
for the presence of air into the piping circuit caused by holes or by a faulty
connection of the inlet/outlet fittings of the pump.
ATTENTION! - Please check that the piping circuit and the
inlet/outlet connections are steadily connected to the pump
before starting up the pump. Do not carry out any connection
or disconnection of the piping or of the pump fittings when
the pump is working.
ATTENTION! - The pump must not run dry for the necessary
selfpriming time or for the emptying time at the end of
operation in order to avoid any burning or severe damages to
the rubber impeller.
3.2

CONTROL DEVICES

REVERSE SWITCH
version. The single speed version presents pos. O for standstill phase, while
the 1 and 2 positions represents the two working directions. Instead, the two
speed version presents two speed positions for each running directions: pos. 1
represents the lowest speed and pos. 2 the highest one. Some pump executions
with single phase drive have a starting reverse switch; in this case the switch
must be put on pos AVV. and kept in this position till the pump begins to work,
then release the switch which will automatically stop in pos. 1 or 2. This
operation must be repeated every time when starting up the pump and also when
reversing the working direction. Pumps with this starting position should not
be used for automatic working (for example with level sensor).
STANDARD CONTROL PANEL
reverse switch.
- The reverse switch can be available in one or two speed
- This control panel is made of an IP55 box with a
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