ELECTRIC PUMP EL 1204 A/B
INSTRUCTIONS HANDBOOK
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____________________________________________________________________________Ed. 12/11____
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3.0 STARTING AND OPERATION
STARTING
The pump has been created to pump suspended matter, even with solid parts, as long as water is always
present. It can be used for civil and industrial purposes, as long as conditions described in this manual are
observed.
ATTENTION
1) The control panel has a switch to which must be applied a device with a lock that
stops the use of the pump. The key will be given to someone in charge who will be
responsible for all the operations which he will supervise to avoid improper use of the
machine.
Check the direction of rotation: by passing very short current
impulses with the START/STOP switches placed on the control
panel, and check that the direction of rotation is that indicated
on the rating plate.
2) Immerse the pump in clear water and push the “START”
button.
3) If any priming problems should come up, stop the pump by
pressing the “STOP” button and wait for about 30 seconds,
leaving it immersed, until all the air has been eliminated.
4) Never operate the immersed pump without connecting the
pipes, because not sensing the load loss foreseen, the
electric motor could overshoot the maximum current absorption
(and in the absence of the suitable safety devices be completely
damaged). When only water is pumped, absorption should be 20% below that allowed.
If this is not the case, the load loss must be increased, in one of the following ways:
-by adding pipes
-by creating bottlenecks
-raising the discharge height
5) Slowly lower the pump until it comes into contact
with the material.
6) Check the percentage of solid in order not to
go over the maximum absorption limit.
7) When clean water is not available, but only
mud and other mixtures, check that the pump
does not go over the maximum absorption limit
indicated on the rating plate (Fig. 7); however, if
this does happen, create a further load loss,
acting as indicated at the preceding point 4.
8) Before stopping the pump, it is always a good
rule to pump water with very little solid in it, so
that the pipes are washed.
Fig. 7
