Piping Checklist; Coupling Alignment; Electrical Installation - Lowara ESH Serie Manual De Instalación, Funcionamiento Y Mantenimiento

• Solid base frame which does not twist or vibrate
during operation (resonance).
• Mounting surfaces of the pump feet and the mo-
tor on the base frame must be flat (machining is
recommended).
• Safe fastening of pump and motor must be guar-
anteed.
• Adequate space between pump and motor shaft
must be left depending on the used coupling.
• Between pump and base frame must be an ade-
quate shimming, so that in case of replacement
the same height between bottom and centerline
can be adjusted (recommended vertical adjust-
ment 4-6 mm).

4.3.2 Piping checklist

Check that the following are adhered to:
• The suction lift line has been laid with a rising
slope, at positive suction head line with a down-
ward slope towards the pump.
• The nominal diameters of the pipelines are at
least equal to the nominal diameters of the pump
ports.
• The pipelines have been anchored in close prox-
imity to the pump and connected without trans-
mitting any stresses or strains.
CAUTION:
Welding beads, scale and other impuri-
ties in the piping damage the pump.
• Free the piping from any impurities.
• If necessary, install a filter.

4.3.3 Coupling alignment

After mounting to the foundation and the connection
of the piping, the coupling must be adjusted again,
even if the unit was delivered completely mounted
on the frame.
Remove the coupling guard
'Wire mesh' type
For information see Figure 17
1. Unscrew the fixing devices (2).
2. Open the lift guard (1).
– Do not loosen screws, washers and nuts.
Alignment
For information see Figure 18
1. Loosen screws of the support and pump foot.
2. Place the ruler (1) axially on both coupling
halves.
3. Leave the ruler (1) in this position and turn the
coupling by hand.
– The coupling is aligned correctly if the dis-
tances 'a' and 'b' to the respective shafts are
the same at all points around the circumfer-
ence.
– 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.
4. Check the distance between the two coupling
halves around the circumference with a gauge
(2).
on page 381.
on page 383.
– The coupling is aligned correctly if the dis-
tance 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 support and pump 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 opera-
tion warm condition and on system pressure if avail-
able 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 cou-
pling guard correctly installed.
'Wire mesh' type
For information see Figure 17
1. Open and place the guard (1) in a way that it
envelops the bearing cover and the supporting/
adjusting ring (6).
2. Press the supporting/adjusting ring (6) axially to
the motor.
3. Screw the fixing devices (2).

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
384. The 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 pro-
tection against cable slipping and humidity en-
tering the terminal box.
4. If the motor is not equipped with automatic reset
thermal protection, then adjust the overload pro-
tection according to the list below.
en - Original instructions
on page 381.
Figure 19 on page
21