Use And Starting; Maintenance And Repairs - EBARA OPTIMA Serie Manual De Uso Y Mantenimiento

connect the power cable to the terminal board and switch on briefly;
the pump shall start with a kick in 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 re-
spective tolerances.
8.1. ADJUSTMENTS AND RECORDINGS
EN
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 WITH-
OUT WATER. DOING SO CAN SERIOUSLY DAMAGE THE INTER-
NAL COMPONENTS.
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 simi-
lar plants;
c) prolonged motor pump operation with the delivery pipe closed can
cause damage;
d) avoid switching the motor pump on and off too frequently (check the
maximum number in FIG. 8);
e) during power cuts, it is advisable to disconnect the power to the pump.
9.2. STARTING
a) start the pump two or three times to check system conditions;
b) restrict the delivery to cause a rapid pressure increase for a few times;
c) 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 cor-
rectly; 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 gen-
erally 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 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
8
CAUSE SOLUTION
check that the float
Float sticking
reaches the level ON
Thermal protection It reactivates
activated automatically
(single phase) (single phase only)
DISPLAYED FAULT CAUSE
Incorrect electrical
connection
automatic switch trig-
gered or fuses blown
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
Pressure minimum pressure is
applications minimal
THE PUMP DOES
Maximum
NOT STOP
pressure too high
Pressure applications
Flow rate too high
Cavitation
THE PUMP
VIBRATES Irregular piping
Or is too noisy du-
Noisy bearing
ring operation
Foreign bodies sliding
along the motor fan
Incorrect priming
SOLUTION
Check the terminal
board and the electri-
cal panel
reset the switch or
replace the fuses and
verify the cause
Check the
electrical
supply meter
Check the
connection to the
power 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 differ-
ence between the two
pressures
Set maximum
pressure at a
lower value
reduce the flow rate
Contact the nearest
retailer
Fix in a better way
Contact the nearest
retailer
Remove the foreign
bodies
Bleed the pump and/or
fill it again