Fill The Pump; Check The Rotation Direction (Threephase Motor); Start The Pump - Xylem Goulds NSC Manual De Instalación, Funcionamento Y Mantenimiento

• Never operate the pump with the suction ON-
OFF valve closed.
• Do not expose an idle pump to freezing condi-
tions. Drain all liquid that is inside the pump. Fail-
ure to do so can cause liquid to freeze and dam-
age the pump.
• The sum of the pressure on the suction side
(mains, gravity tank) and the maximum pressure
that is delivered by the pump must not exceed
the maximum working pressure that is allowed
(nominal pressure PN) for the pump.
• Do not use the pump if cavitation occurs. Cavita-
tion can damage the internal components.

5.1 Fill the pump

For information about additional pump connections,
see Figure 21 on page 407.
Installations with liquid level above the pump
(suction head)
For an illustration that shows where pump plugs are,
see Figure 22 on page 409.
1. Close the on-off valve located downstream from
the pump.
2. Remove the fill (3) or gauge plug (1) and open
the on/off valve upstream until the water flows
out of the hole.
a) Close the fill (3) or gauge plug (1).
Installations with liquid level below the pump
(suction lift)
For an illustration that shows where pump plugs are,
see Figure 23 on page 410.
1. All pipe system empty:
a) Open the on-off valve located upstream from
the pump.
b) Remove the fill plug (3) and the gauge plug (1).
Use a funnel to fill the pump through the fill hole
until the water flows out of this hole.
c) Tighten the fill plug (3) and the gauge plug (1).
2. Filled discharge pipe system:
a) Open the on-off valve located upstream from
the pump and open the on-off valve down-
stream.
b) Remove the gauge plug (1) until water flows out
of this hole.
c) Tighten the gauge plug (1).
5.2 Check the rotation direction (three-
phase motor)
Follow this procedure before start-up.
1. Locate the arrows on the adaptor or the motor
fan cover to determine the correct rotation direc-
tion.
2. Start the motor.
3. Quickly check the direction of rotation through
the coupling guard or through the motor fan
cover.
4. Stop the motor.
5. If the rotation direction is incorrect, then do as
follows:
a) Disconnect the power supply.
b) In the terminal board of the motor or in the elec-
tric control panel, exchange the position of two
of the three wires of the supply cable.
For the wiring diagrams, see
406.
c) Check the direction of rotation again.

5.3 Start the pump

The responsibility for checking the correct flow and
the temperature of the pumped liquid rests with the
installer or owner.
Before starting the pump, make sure that:
• The pump is correctly connected to the power
supply.
• The pump is correctly filled according to instruc-
tions in Fill the pump (chapter 5).
• The on-off valve located downstream from the
pump is closed.
1. Start the motor.
2. Gradually open the on-off valve on the dis-
charge side of the pump.
At the expected operating conditions, the pump
must run smoothly and quietly. If not, refer to
Troubleshooting on page 24.
6 Maintenance
Precautions
Electrical Hazard:
Disconnect and lock out electrical power
before installing or servicing the unit.
WARNING:
• Maintenance and service must be
performed by skilled and qualified
personnel only.
• Observe accident prevention regula-
tions in force.
• Use suitable equipment and protec-
tion.
• Make sure that the drained liquid
does not cause damage or injuries.
6.1 Service
If the user wishes to schedule regular maintenance
deadlines, they are dependent on the type of pump-
ed liquid and on the operating conditions of the
pump.
Contact the local sales and service representative
for any requests or information regarding routine
maintenance or service.
Extraordinary maintenance may be necessary to
clean the liquid end and/or replace worn parts.
Pumps with greased for life bearings
Pumps with greased for life bearings do not require
any scheduled routine maintenance.
Pumps with re-greaseable bearings
• Regrease at 4000 operating hours, but at least
once per year. Clean lubrication nipples (SN)
first.
• Use NLGI Grade 2 grease or equivalent.
en - Original instructions
Figure 20 on page
23