Use And Starting; General Warnings; Maintenance And Repairs - EBARA 2GPE E-SPD+ Gebrauchs- Und Instandhaltungshandbuch

motor's terminal strip.
– For applications with inverter use a cable length <25 meters.
SUBMERSIBLE MOTOR-DRIVEN PUMPS
– In single phase versions, plug the unit into the socket.
– For threephase versions (FIG. 5), check that the motor turns in a clockwise
direction looking at the pump from the top, proceed as follows: with the
motor-driven pump not yet secured to the system, connect the power cable
to the terminal board and switch on briefly; the pump shall start with a kick in
EN
an anti-clockwise direction, seen from the top of the pump. If the direction is
wrong (clockwise), invert two of the three wires in the terminal board of the
electrical panel.
FIG. 7 shows the standard voltages shown on the plate with their respective tolerances.
8.1. ADJUSTMENTS AND RECORDINGS
In pumps fitted with a float, adjust the length of the float cable with regards to the
minimum and maximum value of the water (see PART 2).
Check that the system automatisms do not require a number of start-ups
higher than the number shown in FIG. 8 for surface pumps and in PART 2 for
submersible pumps.

9. USE AND STARTING

NEVER ALLOW THE MOTOR-DRIVEN PUMP TO OPERATE WITHOUT
WATER. DOING SO CAN SERIOUSLY DAMAGE THE INTERNAL COM-
PONENTS.

9.1. GENERAL WARNINGS

a) Our surface pumps are designed to operate at a temperature no higher than
40°C and a level no higher than 1000 metres;
b) our motor-driven pumps cannot be used in swimming pools or similar plants;
c) prolonged motor pump operation with the delivery pipe closed can cause
damage;
d) Avoid switching the motor pump on and off more than 50,000 times a year.
If operate the pump on and off more than 50,000 times per year, the pump
life may be shortened and there is a risk of premature failure.Regarding the
maximum number per hour, please refer also Chapter 8;
e) during power cuts, it is advisable to disconnect the power to the pum;
f) Select the pump so that it will operate close to the best efficiency point, at
least between minimum and maximum rated flow rate.
9.2. STARTING DIAGRAM
To put the pump into operation, you must proceed as follows:
a) Insert a flat-tip screwdriver through the fan cover, in the back of the pump,
until it fits into the slot made on the end of the rotor shaft;
b) Turn the screwdriver a couple of complete turns both ways;
c) Connect the pump to the system;
d) Start the pump two or three times to check system conditions;
e) restrict the delivery to cause a rapid pressure increase for a few times;
f) make sure that the noise, vibration, pressure and electrical voltage levels are
normal.
9.3. STOPPING
a) Gradually interrupt water circulation in the delivery section to avoid overpressure
in the piping and pump caused by water hammering;
b) Cut off the power supply.

10. MAINTENANCE AND REPAIRS

We recommend periodically checking that the pump is working correctly; pay
particular attention to any abnormal noise or vibration and, for surface pumps,
any mechanical seal leaks.
The main and most common special maintenance operations are generally
as follows:
− replacement of mechanical seals
− replacement of grommets
− replacement of bearings
− replacement of capacitors.
When the SURFACE pump remains inactive for a long period, it should be emptied
completely, removing the discharge and filling caps, washed carefully with clean
10
water then emptied. Do not leave water deposits inside. This operation must always
be carried out whenever there is a chance of frost in order to avoid the breakdown
of the pump components. If the power cord needs changing on submersible pumps,
this must be done by an assistance centre only.
10.1. TROUBLESHOOTING
DISPLAYED FAULT CAUSE
Float sticking
Thermal protection
activated
(single phase)
Incorrect electrical
connection
THE PUMP DOES
Automatic switch trig-
NOT WORK
gered or fuses blown
The motor turns
No electricity
Plug not inserted
Decrease in the line
voltage
Suction filter / hole
blocked
Foot valve
THE PUMP DOES
blocked
NOT WORK
The motor turns
Pump not
primed
Pressure
too low
System
undersized
System dirty
Water level
too low
THE PUMP WORKS
Incorrect rotational
with a reduced flow
direction
rate
(threephase only)
Incorrect supply
voltage
Leaks from piping
Pressure too high
THE PUMP STOPS
Liquid temperature
AFTER WORKING
too high
FOR BRIEF
PERIODS
Thermal protection
Internal fault
intervention
THE PUMP STOPS The difference be-
AFTER WORKING tween
FOR BRIEF PERIODS maximum and min-
Pressure
imum pressure is
applications minimal
SOLUTION
Check that the float
reaches the level ON
It reactivates
automatically
(single phase only)
Check the terminal
board and the electrical
panel
Reset the switch or
replace the fuses and
verify the cause
Check the
electrical
supply meter
Check the
connection to the pow-
er supply
Wait for voltage to
return to normal
Clean the
filter / hole
Clean the valve and
check its operation
Prime the pump
Check any delivery
non-return valves
Check the liquid level
Restrict the
delivery gate
Re-examine
the system
Clean the piping,
valves, filters
Switch off the pump or
immerse the foot valve
Invert the two phases
Supply the pump with
the voltage indicated
on the ate
Check the joints
Recheck the system
The temperature ex-
ceeds the
technical limits of the
pump
Contact the nearest
retailer
Increase the difference
between the two
pressures