Electrical Installation; Commissioning, Startup, Operation, And Shutdown; Fill The Pump - Xylem LOWARA e-MPA Manual De Instalación, Funcionamento Y Mantenimiento

en - Original instructions
–
The coupling is aligned correctly if
the distance between the two
coupling halves is the same at all
points around the circumference.
–
The radial and axial deviation
between the two coupling halves
must not exceed the values set by
the manufacturer, during standstill as
well as at operating temperature and
under inlet pressure.
5. Re-tighten screws of the motor foot without
transmitting any stresses and strains.
Dial gauges can be used in the place of ruler and
thickness gauge.
Contact the local sales and service
representative for any requests or information.
NOTE: Check alignment of coupling again in
operation warm condition and on system
pressure if available and correct, if necessary.
Be sure that the unit can be easily turned by
hand.
NOTICE:
Improper alignment of the unit can lead to
damages at coupling and unit.
Install the coupling guard
CAUTION:
Never operate the pump without the
coupling guard correctly installed.
For information see Figure
Place the coupling guard – lower half (2) by
1.
using the fixing devices – low (2).
2. Insert the adjusting ring (3) with slot
downward and press it axially to the motor.
Place the coupling guard – upper half (1) by
3.
using the fixing devices.
4. Screw the fixing devices.
4.3.4

Electrical installation

1. Remove the screws of the terminal box cover.
2. Connect and fasten the power cables
according to the applicable wiring diagram.
For wiring diagrams, see
diagrams are also available on the back of the
terminal box cover.
a) Connect the ground (earth) lead.
Make sure that the ground (earth) lead
is longer than the phase leads.
b) Connect the phase leads.
3. Mount the terminal box cover.
NOTICE:
Tighten the cable glands carefully to ensure
protection against cable slipping and humidity
entering the terminal box.
4. If the motor is not equipped with automatic
reset thermal protection, then adjust the
overload protection according to the list
below.
–
If the motor is used with full load,
then set the value to the nominal
current value of electric pump (data
plate)
22
14.
Figure 16. The
–
If the motor is used with partial load,
then set the value to the operating
current (for example measured with
a current pincer).
–
If the pump has a star-delta starting
system, then adjust the thermal
relay to 58% of the nominal current
or operating current (only for three-
phase motors).
5 Commissioning,
Startup, Operation, and
Shutdown
Precautions
WARNING:
 Make sure that the drained liquid
does not cause damage or injuries.
 The motor protectors can cause the
motor to restart unexpectedly. This
could result in serious injury.
 Never operate the pump without the
coupling guard correctly installed.
CAUTION:
 The outer surfaces of the pump and
motor can exceed 40ºC (104ºF)
during operation. Do not touch with
any part of the body without
protective gear.
 Do not put any combustible material
near the pump.
NOTICE:

Never operate the pump below the minimum
rated flow, when dry, or without prime.

Never operate the pump with the delivery on-
off valve closed for longer than a few seconds.

Never operate the pump with the suction on-
off valve closed.

Do not expose an idle pump to freezing
conditions. Drain all liquid that is inside the
pump. Failure to do so can cause liquid to
freeze and damage the pump.

The sum of the pressure on the suction side
(mains, gravity tank) and the maximum
pressure that is delivered by the pump must
not exceed the maximum working pressure
that is allowed (nominal pressure PN) for the
pump. See Figure 3.

Do not use the pump if cavitation occurs.
Cavitation can damage the internal
components.
5.1

Fill the pump

For information about pump connections, see
Figure 17.
Installations with liquid level above the pump
(suction head)
1. Close the on-off valve located downstream
from the pump.
2. Open the screwed plugs (PM2)
3. Open the on-off valve upstream until the
water flows out of the hole.