Electrical Installation; Commissioning, Startup, Operation, And Shutdown - Xylem Goulds NSC Manual De Instalación, Funcionamento Y Mantenimiento

en - Original instructions
5. Remove the coupling guard — lower half (2).
6. Open and lift the supporting/adjusting ring (6).
Alignment
For information see Figure 19
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).
– 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).
'Shell' type
For information see Figure 18
1. Place the coupling guard — lower half (2) using
the fixing devices — low (4).
2. Open and insert the supporting/adjusting ring
(6) with slot downward and press it axially to the
motor.
22
on page 405.
on page 400.
on page 402.
3. Place the coupling guard — upper half (1) using
the fixing devices — up (3).
4. Screw the fixing devices — side (5).

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
406. 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.
– 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
part of the body without protective
gear.
• Do not put any combustible material
near the pump.
NOTICE:
• Never operate the pump below the minimum rat-
ed flow, when dry, or without prime.
• Never operate the pump with the delivery ON-
OFF valve closed for longer than a few seconds.
Figure 20 on page