Xylem e-NSCS: 5 Commissioning, Startup,

en - Translation of the original instructions

Note:

NOTICE:

• If the transmission of vibrations can be disturbing, provide vibra-

• Never operate the pump below the minimum rated flow, when dry,

tion-damping supports between the pump and the foundation.

or without prime.

• Never operate the pump with the delivery ON-OFF valve closed

4.3.2 Piping checklist

for longer than a few seconds.

Check that the following are adhered to:

• Never operate the pump with the suction ON-OFF valve closed.

• The suction lift line has been laid with a rising slope, at positive

• Do not expose an idle pump to freezing conditions. Drain all liquid

suction head line with a downward slope towards the pump.

that is inside the pump. Failure to do so can cause liquid to freeze

• The nominal diameters of the pipelines are at least equal to the

and damage the pump.

nominal diameters of the pump nozzles.

• The sum of the pressure on the suction side (mains, gravity tank)

• The pipelines have been anchored in close proximity to the pump

and the maximum pressure that is delivered by the pump must

and connected without transmitting any stresses or strains.

not exceed the maximum working pressure that is allowed (nomi-

nal pressure PN) for the pump.

CAUTION:

• Do not use the pump if cavitation occurs. Cavitation can damage

the internal components.

Welding beads, scale and other impurities in the piping dam-

age the pump.

Noise level

• Free the piping from any impurities.

For information about noise levels of pump alone and pump equipped

• If necessary, install a filter.

with standard supplied motor, see Table 10.

• Follow the “Permitted Forces and torques on the flanges", see

Figure 21 and Table 22 for casing material cast iron (C) and ductil

5.1 Fill the pump

iron (D) and see Figure 21 and Table 23 for casing material stain-

less steel (N) and duplex (R).

For information about Additional pump connections, see Figure 25 .

The data on forces and moments apply to static pipelines only. The

Installations with liquid level above the pump (suction head)

values are only applicable if the pump is bolted to a rigid and level

foundation.

For an illustration that shows the pump parts, see Figure 26 .

1. Close the on-off valve located downstream from the pump.

4.3.3 Electrical installation

2. Remove the fill (3)or gauge plug (1) and open the on/off valve up-

1. Remove the screws of the terminal box cover.

stream until the water flows out of the hole.

2. Connect and fasten the power cables according to the applicable

a) Close the fill (3) or gauge plug (1).

wiring diagram.

For wiring diagrams, see Figure 24 . The diagrams are also avail-

Installations with liquid level below the pump (suction lift)

able on the back of the terminal box cover.

For an illustration that shows the pump parts, see Figure 27 .

a) Connect the ground (earth) lead.

1. All pipe system empty:

Make sure that the ground (earth) lead is longer than the

a) Open the on-off valve located upstream from the pump and

phase leads.

close the

b) Connect the phase leads.

b) Remove the fill plug (3) and the gauge plug (1) use a funnel

3. Mount the terminal box cover.

to fill the pump through the fill plug (3) until water flows out of

this hole.

NOTICE:

c) Tighten the fill plug (3) and the gauge plug (1).

Tighten the cable glands carefully to ensure protection against ca-

2. Filled discharge pipe system:

ble slipping and humidity entering the terminal box.

a) Open the on-off valve located upstream from the pump and

4. If the motor is not equipped with automatic reset thermal protec-

close the on-off valve downstream.

tion, then adjust the overload protection according to the list be-

b) Remove the gauge plug (1) until water flows out of this hole.

low.

c) Tighten the gauge plug (1).

• If the motor is used with full load, then set the value to the

5.2 Check the rotation direction (three-phase motor)

nominal current value of electric pump (data plate)

• If the motor is used with partial load, then set the value to

Follow this procedure before start-up.

the operating current (for example measured with a current

1. Locate the arrows on the adaptor or the motor fan cover to deter-

pincer).

mine the correct rotation direction.

• If the pump has a star-delta starting system, then adjust the

thermal relay to 58% of the nominal current or operating cur-

2. Start the motor.

rent (only for three-phase motors).

3. Quickly check the direction of rotation through the coupling guard

or through the motor fan cover.

4. Stop the motor.

5 Commissioning, Startup,

5. If the rotation direction is incorrect, then do as follows:

Operation, and Shutdown

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

Precautions

supply cable.

WARNING:

For the wiring diagrams, see Figure 24 .

c) Check the direction of rotation again.

• Make sure that the drained liquid does not cause dam-

age or injuries.

5.3 Start the pump

• The motor protectors can cause the motor to restart un-

expectedly. This could result in serious injury.

The responsibility for checking the correct flow and the temperature of

• Never operate the pump without the coupling guard

the pumped liquid rests with the installer or owner.

correctly installed.

Before starting the pump, make sure that:

• The pump is correctly connected to the power supply.

CAUTION:

• The pump is correctly filled according to instructions in Fill the

• The outer surfaces of the pump and motor can exceed

pump (chapter 5).

40ºC (104ºF) during operation. Do not touch with any

• The on-off valve located downstream from the pump is closed.

part of the body without protective gear.

• Do not put any combustible material near the pump.

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.

e-nscs Installation, Operation, and Maintenance Manual 17