Xylem e-NSCS - Manual (Page 17)

Note:
• If the transmission of vibrations can be disturbing, provide vibra-
tion-damping supports between the pump and the foundation.
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 and Table 22 for casing material cast iron (C) and ductil
iron (D) and see Figure 21 and Table 23 for casing material stain-
less steel (N) and duplex (R).
The data on forces and moments apply to static pipelines only. The
values are only applicable if the pump is bolted to a rigid and level
foundation.
4.3.3 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.
• 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 .
en - Translation of the original instructions
e-nscs Installation, Operation, and Maintenance Manual 17