Xylem e-NSC, e-NSCF, e-NSCC - Manual (Page 18)

• 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 example 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 cur-
rent (only for three-phase motors).
5 Commissioning, Startup,
Operation, and Shutdown
Precautions
WARNING:
• Make sure that the drained liquid does not cause dam-
age or injuries.
• The motor protectors can cause the motor to restart un-
expectedly. 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) during 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 rated flow, when dry,
or without prime.
• Never operate the pump with the delivery ON-OFF valve closed
for longer than a few seconds.
• Never operate the pump with the suction ON-OFF valve closed.
• Do not expose an idle pump to freezing conditions. Drain all liquid
that is inside the pump. Failure to do so can cause liquid to freeze
and damage 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 (nomi-
nal pressure PN) for the pump.
• Do not use the pump if cavitation occurs. Cavitation can damage
the internal components.
Noise level
For information about noise levels of pump alone and pump equipped
with standard supplied motor, see Table 10.
5.1 Fill the pump
For information about Additional pump connections, see Figure 25 .
Installations with liquid level above the pump (suction head)
For an illustration that shows the pump parts, see Figure 26 .
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 up-
stream 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 the pump parts, see Figure 27 .
1. All pipe system empty:
a)
Open the on-off valve located upstream from the pump and
close the
b) Remove the fill plug (3) and the gauge plug (1) use a funnel
to fill the pump through the fill plug (3) until 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
close the on-off valve downstream.
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 deter-
mine the correct rotation direction.
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 electric control
panel, exchange the position of two of the three wires of the
supply cable.
For the wiring diagrams, see
Figure 24 .
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 instructions 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 discharge side of the
pump.
At the expected operating conditions, the pump must run smooth-
ly and quietly. If not, refer to Troubleshooting .
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 regulations in force.
• Use suitable equipment and protection.
• Make sure that the drained liquid does not cause dam-
age or injuries.
6.1 Service
If the user wishes to schedule regular maintenance deadlines, they are
dependent on the type of pumped liquid and on the operating condi-
tions 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.
Bearing types
• Lubrication and lubricant change of rolling element bearings
• Grease-lubricated bearings
• Grease-lubricated bearings have been packed with grease
at the factory. See the bearing size and lubrication type in ta-
ble 6.
Pumps with greased for life bearings
Pumps with greased for life bearings do not require any scheduled rou-
tine 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.
• For approximate quantities of grease, see table 6.
6.2 Torque values
For information about torque values, pump data see Figure 28 , base-
plate data Table 29 .
en - Translation of the original instructions
18 e-NSC Installation, Operation, and Maintenance Manual