EN
4CSR_Rev5 - Operating Instructions
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6.4.2. Assembly of the pumps
These instructions refer to the motor only. Please
strictly observe the assembly instructions of the
pump manufacturer!
Connect the coupling and pump-motor suction
lantern. Clean the surface to be coupled. Put the
suction lantern of the pump in correspondance of the
motor studs. Couple the grooved joint of the pump to
the motor shaft.
Place motor and pump horizontally and level. Turn
motor shaft by hand before assembly. It must turn
freely after overcoming the adhesive friction. Apply
acid-free, waterproof grease to the coupling internal
toothing. Remove nuts from the studs of the motor.
Aling the pump so that its in line with the lead exit
of the motor and guide pump and motor together.
Plase spring rings on the studs and tighten the nuts
crosswise.
Strictly observe the tigthening torques of the unit
manufacturer.
Check radial and axial clearance of the motor
shaft. There must be no rigid connection since
otherwise motor and pumps will be damaged during
commissioning.
Protect coupling spot against contact.
6.5. Electrical connection
OFF
Electrical connection must be carried out only
by a qualified electrician in accordance with
local regulations. Follow safety standards.
The unit must be properly earthed (groun-ded),
also with a non-metallic delivery pipe.
Make sure the frequency and mains voltage cor-
respond with the name plate data.
The control panel must contain:
• a device for disconnection from the mains (switch)
with a contact separation of at least 3 mm in all
poles;
• an adequate motor protector with curve D for the
current indicated on the name-plate;
•
a capacitor for the single-phase pumps, in
accordance with the data indicated on the motors
themselves.
For use in swimming pools (not when persons are
in the pool), garden ponds and similar places, a
residual current device with IΔN not exceeding 30
mA must be installed in the supply circuit.
Install electrodes to protect the pump against dry
running.
6.5.1. Connection of cables
Feed cables have to be chosen on the basis of
power, distance, voltage drop and temperature.
For connection of cables in the well, use thermo-
shrinking insulation sheathes or other systems used
for submerged cables.
Before lowering the motor into the well, use
appropriate instruments to measure continuity
between phases and perform an isolation test
between each single phase and the earth conductor.
6.5.2. Operation with a soft starting device
Adjust soft starter to 55% of the rated vollage
Adjust acceleration and deceleration lime to max. 3
seconds.
Soft starting device has to be bridged after
acceleration with a contactor.
Please striclly observe the manufacturer's operaling
instructions.
6.5.3. Operation with frequency converter
Make sure that the motor is suitable for use with a
variable frequency control.
Adjust the frequency converter so that the limiting
values of min. 30 Hz and max. 60 Hz will not be
exceeded.
The maximum running up time from 0 to 30 Hz and
running down time from 30 to 0 Hz for frequency-
converter operation is 1 second.
7. STARTUP AND OPERATION
7.1. Preliminary checks before start-up of the
pump
Do not start-up the device in case of damaged parts.
7.2. First starting
OFF
ATTENTION: never run the pump dry, not even
for a short trial run.
Start the pump with the gate valve regulated to
minimum aperture and wait until the delivery pipe is
completely free of air.
With a three-phase motor make sure the direction
of rotation is correct.
For this purpose, with the gate valve at half-open
aperture position, check the pressure (with the
pressure gauge) or flow rate (sight check) after
starting. Switch off power, reverse the connections of
two phases on the control panel, re-start and check
the pressure or flow rate capacity again.
The correct direction of rotation will provide a
considerably greater and easily distinguishable
pressure and delivery capacity.
Never start or run the pump when the gate valve
has been opened too widely.
Make sure the pump operates within its rated
limits of performance and that the rated absorbed
current is not exceeded.
Otherwise, regulate the delivery gate valve or the
setting of any pressure switches.
ATTENTION: avoid long periods of operation with
closed discharge.
7.3. Generator supply
The switching sequence is of utmost importance.
If you do not apply this correctly, both motor and
generator may be damaged.
Therefore:
- AIways switch the generator on and off without load!
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