Xylem e-NSC, e-NSCF, e-NSCC - Manual (Page 17)

• Adequate space between pump and motor shaft must be left de-
pending on the used coupling.
• Between pump and base frame must be an adequate 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 downward slope towards the pump.
• The nominal diameters of the pipelines are at least equal to the
nominal diameters of the pump nozzles.
• The pipelines have been anchored in close proximity to the pump
and connected without transmitting any stresses or strains.
CAUTION:
Welding beads, scale and other impurities in the piping dam-
age the pump.
• Free the piping from any impurities.
• If necessary, install a filter.
• Follow the “Permitted Forces and torques on the flanges", see
Figure 21 .
The data on forces and moments apply to static pipelines only. The
values are only applicable if the pump is installed on a baseplate and
bolted to a rigid and level foundation.
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 com-
pletely mounted on the frame.
Figure 4: Alignment of standard coupling
Figure 5: Alignment of spacer coupling
1. Coupling guard upper half
2. Coupling guard lower half
3. Adjusting piece
Remove the coupling guard.
1.
Loosen the support foot and re-tighten it without transmitting any
stresses and strains.
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 distances a and b to
the respective shafts are the same at all points around the
circumference.
• The radial and axial deviation between the two coupling
halves must not exceed the values in table xyz, during
standstill as well as at operating temperature and under inlet
pressure.
4. Check the distance (dimension see general arrangement draw-
ing) between the two coupling halves around the circumference
with a gauge (4). The coupling is correctly aligned 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 in table xyz, during
standstill as well as at operating temperature and under inlet
pressure.
NOTICE:
Mount coupling guard after alignment and before start-up.
Note: Control alignment of coupling again in operation warm condition
and on system pressure (if available) and correct, if necessary. Pay at-
tention to chapter 6 beforehand! It must be possible to turn the unit
easily and harmoniously by hand.
NOTICE:
Improper alignment of the unit can lead to damages at coupling and
unit.
4.3.4 Install the coupling guard
CAUTION:
Never operate the pump without the coupling guard correctly
installed.
Figure 6: Coupling guard parts
1. Coupling guard lower half
2. Coupling guard upper half
3. Adjusting half
1. Screw coupling guard lower half (1) with screws (S1)to bottom of
bearing cover (4) ring.
2. Insert adjusting piece (3) with slot downward and press it axially
to the motor.
3. Screw coupling guard upper half (1) with screws (S2) to the upper
side of the bearing cover (4) ring.
4. Screw parts 1 and 2 together, which fixes the adjusting piece.
4.3.5 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
Figure 24 . The diagrams are also avail-
able 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 ca-
ble slipping and humidity entering the terminal box.
4. If the motor is not equipped with automatic reset thermal protec-
tion, then adjust the overload protection according to the list be-
low.
en - Translation of the original instructions
e-NSC Installation, Operation, and Maintenance Manual 17