Lowara NSC2 Manual De Instalación, Funcionamiento Y Mantenimiento página 19

Frequency Hz Phase ~
50
60
Use cable according to rules with 3 leads (2+earth/
ground) for single phase versions and with 4 leads
(3+earth/ground) for three phase version.
4.3 Install the pump
4.3.1 Mechanical installation
Check the following before installation:
• Use a concrete of compressive strength class
C12/15 which meets the requirements of expo-
sure class XC1 to EN 206-1.
• The mounting surface must have set and must
be completely horizontal and even.
• Observe the weights indicated.
Install the pump set
For examples of horizontal and vertical installations,
see Figure 12 (page 340).
Check that the foundation has been prepared in ac-
cordance with the dimensions given in the outline
drawing/general arrangement drawing.
Type Motor Size Number of
A Up to 132
B From 160
to 200
From 160
to 280
C 250
D Up to 132
UN [V] ± %
1 220 – 240 ± 6
3 230/400 ± 10
400/690 ± 10
1 220 – 230 ± 6
3 220/380 ± 5
380/660 ± 10
Type of
Poles Fastening
2– and 4– Mount on
pole ground us-
ing the vol-
ute casing
feet.
2–pole Mount on
ground us-
ing the
4–pole
pump and
motor feet.
Shims are
required
under the
pump and
motor feet.
2–pole Mount on
ground us-
ing the
pump and
motor feet.
Shims are
required
under the
pump and
motor feet.
2– and 4– Mount on
pole ground us-
ing the vol-
ute casing
feet.
Type Motor Size Number of
E From 160
to 280
1. Position the pump set on the foundation and
level it with the help of a spirit level that is
placed on the discharge port.
The permissible deviation is 0.2 mm/m.
2. Remove the plugs covering the ports.
3. Align the pump and piping flanges on both sides
of the pump. Check the alignment of the bolts.
4. Fasten the piping with bolts to the pump. Do not
force the piping into place.
5. Use shims for height compensation, if necessa-
ry.
6. Tighten the foundation bolts evenly and firmly.
Note:
• If the transmission of vibrations can be disturb-
ing, provide vibration-damping supports between
the pump and the foundation.
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 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
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:
en - Original instructions
Type of
Poles Fastening
2– and 4– Mount on
pole ground us-
ing the mo-
tor feet
Figure 13 (page 341).
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