Use And Operation - Xylem Lowara e-LNE Série Manuel D'installation, D'exploitation Et De Maintenance

4.3.4 Motor guidelines
WARNING: Crushing hazard (limbs)
The pump unit could restart inadvertently
after the motor cools down (single-phase
motors with automatic reset thermal overload
protection): risk of physical injury.
NOTICE:
 Only use dynamically balanced motors with
a half-sized key in the shaft extension (IEC
60034-14) and with standard vibration rate
(A)
 The mains voltage and frequency must
match the specifications on the data plate.
4.3.5 Electrical connection of the
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motor
1. Open the terminal box cover.
2. Connect the power conductors, see Fig. 12.
3. Connect the protection conductor (ground),
making sure that it is longer than the phase
conductors.
4. Connect the phase leads.
5. Close the terminal box cover and tighten all the
screws and cable glands.
Motor without automatic reset thermal overload
protection
1. If the motor is used with full load, then set the
value to the nominal current value on the data
plate of the pump unit.
2. If the motor is used with partial load, then set the
value of the operating current measured with a
current pincer.
3. For three-phase motors with star-delta starting
system, set the thermal relay downstream of the
switching circuit at 58% of the rated or operating
current.
4.3.6 Operation with variable speed
drive
The three-phase motors can be connected to a
frequency converter for speed control.
 The converter exposes the insulation of the motor to
a greater load determined by the length of the
connecting cable: observe the requirements of the
Manufacturer of the frequency converter.
 For applications requiring silent operation, install an
outlet filter between the motor and the converter; a
sinusoidal filter can reduce the noise even further.
 The bearings of the motors, of size 315 S/M and
above, are exposed to the risk of harmful current:
use electrically insulated bearings.
 The conditions of installation must guarantee
protection against voltage peaks between the
terminals and/or dV/dt in the table:
Motor size Voltage peak
12
Or, frequency converter plus motor
dV/dt [V/µs]
[V]
up to 90R (500 V) > 650
from 90R to 180R > 1400
over 180R > 1600
Otherwise, use a motor with reinforced insulation
and a sinusoidal filter.
5

Use and operation

Precautions
WARNING:
 Check that the protection devices of the
joint are installed, when applicable
 Make sure that the drained liquid cannot
cause damage or injuries.
WARNING: Crushing hazard (limbs)
Risk of automatic restarting.
WARNING: Hot surface hazard
 Be aware of the extreme heat generated by
the pump unit
 It is prohibited to put combustible material
near the pump unit.
NOTICE:
 It is prohibited to operate the pump unit
when dry, without priming and below the
minimum rated flow rate
 It is prohibited to operate the pump unit
with the on-off valves on the suction and
delivery sides closed
 It is prohibited to use the pump unit in the
case of cavitation
 The pump unit must be filled and vented
properly before it can be started
 The maximum pressure delivered by the
pump unit, determined by the available
suction pressure, must not exceed the
nominal pressure.
5.1 Filling - Priming
5.1.1 Positive suction head installation
1. Close the on-off valves on the suction and
delivery sides, see Fig. 17
2. Loosen the relief valve H, see Fig. 11
WARNING:
 Be aware of the direction of the vent hole
and make sure that the liquid coming out
cannot cause damage or injury
 In the case of liquids that are excessively hot or
cold, pay particular attention the risk of injury.
13
Available on request
en - Original instructions
> 2200
> 4600
> 5200
13
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