Starting And Running; Starting; Running; Maintenance - Alma RW AD 1500 - RW/RT AD 2000 - RW/RC AD 3000 - RW/RC AD 4000 - RC AD 6000 - RC AD 8000 RW1500 - RW2000 - RT/RTL2000 - RW2500 - RW3 Instrucciones

Connection scheme fi g. 14.
In case of alarm activated stop the electric pump, check the
condition of oil and mechanical seal verifying the reasons which
have caused the intervention.

6. STARTING AND RUNNING

6.1 STARTING

Before starting the electric pump check again electric and hydraulic connections and relevant rating.
Check that all safety procedures and their good functioning have been activated.
Check that electric pump is correctly immerged and that the liquid level is allowing the correct starting.
Start the electric pump and check that value of current does not exceed plate value and that the supply tension
is on the foreseen limits.
Adjust, when present, the correct rating of the protection relay according to the working current value: the relay
must be rated 10% more than the electric pump plate value.
If the unit is not starting don't insist. Identify the malfunction and repair the causes (see par. Defect of
functioning).

6.2 RUNNING

- Standard utilization conditions assure a long life to the electric pump.
- During running it is however necessary to periodically check the working conditions especially when solid or
thready substances are present in the pumped liquid.
- Be sure that number of startings per hour does not exceed the limits indicated and that same are equally
distributed in time.
- Frequent startings in a short time cause overheating and damages to electric winding.
- During inactivity of electric pump plan regular checks on motor insulation and, when present, on the electric
panel.
When electric pump is pumping solid or thready substances that could make deposits it's necessary to provide
frequent washings with clean water. Check, furthermore, that suction grid, pit and eventual fl oating switch are
always cleaned.

7. MAINTENANCE

7.1 ROUTINE MAINTENANCE

Routine maintenance, limited to regular general checks, cleaning or replacement of few component parts must
be carried out by expert technicians only by suitable tools respecting the norm of safety of working ambient
and after becoming familiar with content of the present manual or any other documentation supplied with the
electric pump.
Before any checking or maintenance proceed as follows:
- Disconnect the electric power supply being sure that same cannot be reconnected inadvertently.
- Check that implements and equipment used for handling, lifting and positioning are well dimensiones and
comply with local safety regulations.
- Proceed on safety conditions when there is the risk of toxic gas in the accumulation tank. Make sure of an
effi cient ventilation and to be assisted by a second worker outside able to act promptly and in safety, when
necessary.
Use and maintenance instructions
Electric submersible pumps for sewage
Fig. 14
Thermal probe connection
English
Oil and thermal probe
control relay
Electric supply
50-60 Hz
Thermal
24V AC
probe
Oil
probe
Pump control switch
Wire numeration
GB
29