Install The Pump; Mechanical Installation; Piping Checklist; Coupling Alignment - Xylem Goulds NSC Manual De Instalación, Funcionamento Y Mantenimiento

NOTICE:
• Only use dynamically balanced motors with a
half-sized key in the shaft extension (IEC
60034-14) and with normal vibration rate (N).
• The mains voltage and frequency must agree
with the specifications on the data plate.
In general, motors can operate under the following
mains voltage tolerances:
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 installations, see
15 on page 397
Check that the foundation has been prepared in ac-
cordance with the dimensions given in the outline
drawing/general arrangement drawing.
For information about the pump base and anchor
holes, see Figure 16 on page 397.
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.
Always fit shims, if any, immediately to the left
and right of the foundation bolts between the
baseplate/foundation. For a bolt-to-bolt distance
(L) > 800 mm, fit extra shims halfway between
the bolt holes.
6. Make sure that all shims lie perfectly flush.
7. Insert the foundation bolts into the holes provid-
ed.
UN [V] ± %
1 220 – 240 ± 6
3 230/400 ± 10
400/690 ± 10
1 220 – 230 ± 6
3 220/380 ± 5
380/660 ± 10
Figure
8. Use concrete to set the foundation bolts into the
foundation.
9. Wait until the concrete has set firmly, and then
level the baseplate.
10. Tighten the foundation bolts evenly and firmly.
Note:
• For baseplates, it is recommended to grout the
baseplate with low-shrinkage concrete.
• If the transmission of vibrations can be disturb-
ing, provide vibration-damping supports between
the pump and the foundation.
Mount the pump to a base frame
Be sure to check that the following are adhered to:
• 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.
'Shell' type
For information see Figure 18
1. Unscrew the fixing devices — side (5).
2. Unscrew the fixing devices — up (3).
3. Remove the coupling guard — upper half (1).
4. Unscrew the fixing devices — low (4).
en - Original instructions
on page 400.
on page 402.
21