Electrical Installation; Commissioning, Startup, Operation, And Shutdown - Lowara e-NSC Série Manuel D'installation, D'utilisation Et D'entretien

en - Original instructions
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 in table xyz, during standstill as well
as at operating temperature and under inlet
pressure.
4. Check the distance (dimension see general ar-
rangement drawing) between the two coupling
halves around the circumference with a gauge
(4). The coupling is correctly aligned 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 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 opera-
tion warm condition and on system pressure (if avail-
able) and correct, if necessary. Pay attention 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 cou-
pling guard correctly installed.
Figure 6: Coupling guard parts
1. Coupling guard lower half
2. Coupling guard upper half
22
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
grams are also available on the back of the ter-
minal 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.
• If the motor is used with full load, then set
the value to the nominal current value of
electric pump (data plate)
• If the motor is used with partial load, then set
the value to the operating current (for exam-
ple 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) dur-
ing operation. Do not touch with any
Figure 15 . The dia-