Grundfos SP Series Instrucciones de funcionamiento

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

Other languages

http://net.grundfos.com/qr/i/98074911

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions.

CONTENTS

Page

1. Symbols used in this document

2. Introduction

These instructions apply to Grundfos submersible pumps,

type SP, with submersible motors, types Grundfos MS/MMS or

Franklin 4"-8".

If the pump is fitted with a motor of another motor make than

Grundfos MS or MMS, note that the motor data may differ from

the data stated in these instructions.

3. Delivery and storage

3.1 Delivery

When the pump part and motor are supplied as separate units

(long pumps), fit the motor to the pump as described in section

7.1 Fitting the motor to the pump.

Do not expose the pump to unnecessary impact and shocks.

3.2 Storage

Storage temperature

Pump: -20 °C to +60 °C.

Motor: -20 °C to +70 °C.

The motors must be stored in a closed, dry and well ventilated

room.

The pump should not be exposed to direct sunlight.

If the pump has been unpacked, it should be stored horizontally,

adequately supported, or vertically to prevent misalignment of the

pump. Make sure that the pump cannot roll or fall over.

During storage, the pump can be supported as shown in fig. 1.

Fig. 1 Pump position during storage

3.2.1 Frost protection

If the pump has to be stored after use, it must be stored on a

frost-free location, or the motor liquid must be frost-proof.

1. Symbols used in this document 2

2. Introduction 2

3. Delivery and storage 2

3.1 Delivery 2

3.2 Storage 2

4. Applications 3

4.1 Pumped liquids 3

4.2 Sound pressure level 3

5. Preparations before installation 3

5.1 Checking the motor liquid 3

5.2 Positional requirements 5

5.3 Pump/motor diameter 5

5.4 Liquid temperatures/cooling 5

5.5 Pipe connection 6

6. Electrical connection 6

6.1 Frequency converter operation 7

6.2 Motor protection 7

6.3 Lightning protection 8

6.4 Cable sizing 8

6.5 Control of single-phase MS 402 motors 9

6.6 Connection of single-phase motors 9

6.7 Connection of three-phase motors 10

7. Installation 11

7.1 Fitting the motor to the pump 11

7.2 Removing and fitting the cable guard 12

7.3 Connecting the submersible drop cable 12

7.4 Riser pipe 12

7.5 Maximum installation depth below water level [m] 12

7.6 Cable clips 13

7.7 Lowering the pump 13

7.8 Installation depth 13

8. Startup and operation 13

8.1 Startup 13

8.2 Operation 14

9. Maintenance and service 14

10. Fault finding 15

11. Checking motor and cable 16

12. Disposal 16

Warning

Prior to installation, read these installation and

operating instructions. Installation and operation

must comply with local regulations and accepted

codes of good practice.

Warning

If these safety instructions are not observed, it may

result in personal injury.

Warning

If these instructions are not observed, it may lead to

electric shock with consequent risk of serious

personal injury or death.

Caution

If these safety instructions are not observed, it may

result in malfunction or damage to the equipment.

Note

Notes or instructions that make the job easier and

ensure safe operation.

Note

The USB stick supplied with the product contains

installation and operating instructions in various

languages.

Caution

The pump should remain in the packing until it is

placed in vertical position during installation.

Handle the pump with care.

Note

The extra nameplate supplied with the pump should

be fixed at the installation site.

Caution

If MMS motors are stored, the shaft must be turned

by hand at least once a month. If a motor has been

stored for more than one year before installation, the

rotating parts of the motor must be dismantled and

checked before use.

TM00 1349 2495

English (GB)

4. Applications

Grundfos SP submersible pumps are designed for a wide range

of water supply and liquid transfer applications, such as the

supply of fresh water to private homes or waterworks, water

supply in horticulture and agriculture, drawdown of groundwater

and pressure boosting, and various industrial jobs.

The pump must be installed so that the suction interconnector is

completely submerged in the liquid. The pump can be installed

horizontally or vertically. See section 5.2 Positional requirements.

4.1 Pumped liquids

Clean, thin, non-explosive liquids without solid particles or fibres.

The maximum sand content of the water must not exceed

50 g/m3. A larger sand content will reduce the life of the pump

and increase the risk of blockage.

If liquids with a viscosity higher than that of water are to be

pumped, contact Grundfos.

The pump versions SP A N, SP A R, SP N, SP R and SPE are

designed for liquids with higher aggressiveness than drinking

water.

The maximum liquid temperature appears from section 5.4 Liquid

temperatures/cooling.

4.2 Sound pressure level

The sound pressure level has been measured in accordance with

the rules laid down in the EC machinery directive 2006/42/EC.

Sound pressure level of pumps

The values apply to pumps submerged in water, without external

regulating valve.

Sound pressure level of motors

The sound pressure level of Grundfos MS and MMS motors is

lower than 70 dB(A).

Other motor makes: See installation and operating instructions

for these motors.

5. Preparations before installation

5.1 Checking the motor liquid

The motors are factory-filled with a special non-poisonous liquid

which is frost-proof down to -20 °C.

Refill liquid as described below.

5.1.1 Grundfos MS 4000 and MS 402 motors

The filling hole for motor liquid is placed in the following positions:

• MS 4000: in the top of the motor.

• MS 402: in the bottom of the motor.

1. Position the submersible pump as shown in fig. 2.

The filling screw must be at the highest point of the motor.

2. Remove the screw from the filling hole.

3. Inject liquid into the motor with the filling syringe until the

liquid runs back out of the filling hole. See fig. 2.

4. Replace the screw in the filling hole and tighten securely

before changing the position of the pump.

Torques

• MS 4000: 3.0 Nm.

• MS 402: 2.0 Nm.

The submersible pump is now ready for installation.

Fig. 2 Motor position during filling - MS 4000 and MS 402

Caution

When pumping liquids with a density higher than that

of water, motors with correspondingly higher outputs

must be used.

Pump type LpA [dB(A)]

SP 1A < 70

SP 2A < 70

SP 3A < 70

SP 5A < 70

SP 7 < 70

SP 9 < 70

SP 11 < 70

SP 14 < 70

SP 17 < 70

SP 30 < 70

SP 46 < 70

SP 60 < 70

SP 77 < 70

SP 95 < 70

SP 125 79

SP 160 79

SP 215 82

Warning

Before starting work on the product, switch off the

power supply. Make sure that the power supply

cannot be accidentally switched on.

Note

Check the level of motor liquid and refill if required.

Use clean water.

Caution

If frost protection is required, special Grundfos liquid

must be used to refill the motor. Otherwise clean

water may be used for refilling (however, never use

distilled water).

TM00 6423 0606

MS 4000 MS 402

English (GB)

5.1.2 Grundfos MS 6000 motors

• If the motor is delivered from stock, check the level of motor

liquid before fitting the motor to the pump. See fig. 3.

• When pumps are delivered direct from Grundfos, the level has

already been checked.

• Check the level in connection with service. See fig. 3.

The filling hole for motor liquid is placed at the top of the motor.

1. Position the submersible pump as shown in fig. 3. The filling

screw must be at the highest point of the motor.

2. Remove the screw from the filling hole.

3. Inject liquid into the motor with the filling syringe until the

liquid runs back out of the filling hole. See fig. 3.

4. Replace the screw in the filling hole and tighten securely

before changing the position of the pump.

Torque: 3.0 Nm.

The submersible pump is now ready for installation.

Fig. 3 Motor position during filling - MS 6000

5.1.3 Grundfos MMS 6, MMS 8000, MMS 10000 and

MMS 12000 motors

1. Place the motor at a 45 ° angle with the top of the motor

upwards. See fig. 4.

2. Unscrew the plug A and place a funnel in the hole.

3. Pour tap water into the motor until the motor liquid inside the

motor starts running out of A.

4. Remove the funnel and refit the plug A.

The submersible pump is now ready for installation.

Fig. 4 Motor position during filling - MMS

5.1.4 Franklin motors from 3 kW and up

Check the level of motor liquid in Franklin 4" and 6" motors by

measuring the distance from the bottom plate to the built-in

rubber diaphragm. The distance can be measured by inserting a

rule or a small rod through the hole until it touches the diaphragm.

See fig. 5.

Fig. 5 Measuring the distance from bottom plate to

diaphragm

The table below shows the correct distance from the outside of

the bottom plate to the diaphragm:

Fig. 6 Franklin motors

If the distance is not correct, carry out an adjustment as

described in section 5.1.5 Franklin motors.

TM03 8129 0507

Caution

Do not use motor liquid as it contains oil.

Caution

Before fitting the motor to a pump after a long period

of storage, lubricate the shaft seal by adding a few

drops of water and turning the shaft.

TM03 0265 3605

45°

Caution

Take care not to damage the diaphragm.

TM00 1353 5092

Motor Dimension Distance

[mm]

Franklin 4", 0.25 - 3 kW

(fig. 6a) A8

Franklin 4", 3 - 7.5 kW

(fig. 6b) B16

Franklin 6", 4-45 kW

(fig. 6c) C1 35

Franklin 6", 4-22 kW

(fig. 6d) C2 59

TM00 6422 3695

6a 6b

6c 6d

English (GB)

5.1.5 Franklin motors

Check the level of motor liquid in Franklin 8" motors as follows:

1. Press out the filter in front of the valve at the top of the motor

using a screwdriver. If the filter is slotted, unscrew. Figure 7

shows the position of the filling valve.

2. Press the filling syringe against the valve and inject the liquid.

See fig. 7. If the valve cone is depressed too far, it may be

damaged thus causing the valve to leak.

3. Remove any air in the motor by pressing the point of the filling

syringe lightly against the valve.

4. Repeat the process of injecting liquid and releasing air until

the liquid starts running out or the diaphragm is in its correct

position (Franklin 4" and 6").

5. Refit the filter.

The submersible pump is now ready for installation.

Fig. 7 Position of filling valve

5.2 Positional requirements

Depending on motor type, the pump can be installed either

vertically or horizontally. A complete list of motor types suitable

for horizontal installation is shown in section 5.2.1 Motors suitable

for horizontal installation.

If the pump is installed horizontally, the discharge port should

never fall below the horizontal plane. See fig. 8.

Fig. 8 Positional requirements

If the pump is installed horizontally, e.g. in a tank, we recommend

that you fit it in a flow sleeve.

5.2.1 Motors suitable for horizontal installation

When Franklin 4" motors up to and including 2.2 kW are started

more than 10 times a day, we recommend that you incline the

motor at least 15 ° above the horizontal plane in order to minimise

wearing of the upthrust disc.

5.3 Pump/motor diameter

We recommend that you check the borehole with an inside

calliper to ensure unobstructed passage.

5.4 Liquid temperatures/cooling

The maximum liquid temperature and the minimum flow velocity

past the motor appear from the table below.

We recommend that you install the motor above the well screen

in order to achieve proper motor cooling.

If there is a risk of sediment build-up, such as sand, around the

motor, use a flow sleeve in order to ensure proper cooling of the

motor.

TM00 1354 5092

Warning

If the pump is to be installed in a position where it is

accessible, the coupling must be suitably isolated

from human touch. The pump can for instance be

built into a flow sleeve.

TM00 1355 5092

Allowed

Not allowed

Motor

Output power

50 Hz Output power

60 Hz

[kW] [kW]

MS All All

MMS 6 5.5 - 37 5.5 - 37

MMS 8000 22-110 22-110

MMS 10000 75-190 75-190

MMS 12000 147-250 147-250

Caution

During operation, the suction interconnector of the

pump must always be completely submerged in the

liquid. Make sure that the NPSH values are fulfilled.

Warning

If the pump is used for pumping hot liquids (40 to 60

°C), make sure that persons cannot come into

contact with the pump and the installation, e.g. by

installing a guard.

Caution

In cases where the stated flow velocity cannot be

achieved, a flow sleeve must be installed.

English (GB)

5.4.1 Maximum liquid temperature

Out of consideration for the rubber parts in pump and motor, the

liquid temperature must not exceed 40 °C (~ 105 °F). See also

the table below.

The pump can operate at liquid temperatures between 40 °C and

60 °C (~ 105 °F and 140 °F) provided that all rubber parts are

replaced every third year.

5.5 Pipe connection

If noise may be transmitted to the building through the pipework,

we recommend that you use plastic pipes.

When using plastic pipes, secure the pump by an unloaded

straining wire.

When connecting plastic pipes, use a compression coupling

between the pump and the first pipe section.

6. Electrical connection

The supply voltage, rated maximum current and cos φappear

from the loose data plate which must be fitted close to the

installation site.

The required voltage quality for MS and MMS motors, measured

at the motor terminals, is - 10 %/+ 6 % of the nominal voltage

during continuous operation (including variation in the supply

voltage and losses in cables).

Check also that there is voltage symmetry in the power supply

lines, i.e. same difference of voltage between the individual

phases. See section 11. Checking motor and cable, item 2.

If MS motors with a built-in temperature transmitter (Tempcon)

are not installed together with a MP 204 or similar Grundfos

motor protection, they must be connected to a 0.47 μF capacitor

approved for phase-phase operation (IEC 384-14) to meet the EC

EMC directive (2004/108/EC). The capacitor must be connected

to the two phases to which the temperature transmitter is

connected. See fig. 9.

Fig. 9 Connection of capacitor

The motors are wound for direct-on-line starting or star-delta

starting, and the starting current is between four and six times the

rated current of the motor.

The run-up time of the pump is only about 0.1 second.

Direct-on-line starting is therefore normally approved by the

power supply company.

Motor

Installation

Flow past

the motor Vertical Horizontal

Grundfos

MS 402

MS 4000

MS 6000

0.15 m/s 40 °C

(~ 105 °F)

40 °C

(~ 105 °F)

Grundfos

MS 4000I* 0,15 m/s 60 °C

(~ 140 °F)

Flow sleeve

recommended

60 °C

(~ 140 °F)

Flow sleeve

recommended

Grundfos

MS 6000I* 1.00 m/s

Grundfos

MMS

0.15 m/s 25 °C

(~ 77 °F)

25 °C

(~ 77 °F)

0.50 m/s 30 °C

(~ 86 °F)

30 °C

(~ 86 °F)

Franklin

4" 0.08 m/s 30 °C

(~ 85 °F)

30 °C

(~ 85 °F)

Franklin

6" and 8" 0.16 m/s 30 °C

(~ 85 °F)

30 °C

(~ 85 °F)

* At an ambient pressure of minimum 1 bar (1 MPa).

Note

37 kW MMS 6, 110 kW MMS 8000 and 170 kW

MMS 10000: The maximum operational liquid

temperature is 5 °C lower than the values stated in

the above table.

190 kW MMS 10000: The temperature is 10 °C lower.

Note

We recommend plastic pipes for 4" pumps only.

Warning

Make sure that the plastic pipes are suitable for the

actual liquid temperature and the pump pressure.

Warning

During electrical installation, make sure that the

power supply cannot be accidentally switched on.

Warning

The electrical installation should be carried out by an

authorised person in accordance with local

regulations.

Warning

The pump must be earthed.

The pump must be connected to an external mains

switch with a minimum contact gap of

3 mm in all poles.

TM00 7100 0696

Colours of the leads

Lead Flat cable Single leads

1 = L1 Brown Black

2 = L2 Black Yellow

3 = L3 Grey Red

4 = PE Yellow/green Green

English (GB)

6.1 Frequency converter operation

6.1.1 Grundfos motors

Three-phase Grundfos motors can be connected to a frequency

converter.

If a temperature transmitter is required, Grundfos offers a Pt100

or Pt1000 sensor for the submersible motor.

To avoid damage to the pump part, the motor must stop when the

pump flow falls below 0.1 x nominal flow.

Depending on the frequency converter type, it may expose the

motor to detrimental voltage peaks.

We recommend that you protect other motors against voltage

peaks higher than 850 V.

The above disturbance can be abated by installing an RC filter

between the frequency converter and the motor.

Possible increased acoustic noise from the motor can be abated

by installing an LC filter which will also eliminate voltage peaks

from the frequency converter.

We recommend that you install an LC filter when using a

frequency converter. See section 6.7.6 Frequency converter

operation.

For further details, contact your frequency converter supplier or

Grundfos.

6.1.2 Other motor makes than Grundfos

Contact Grundfos or the motor manufacturer.

6.2 Motor protection

6.2.1 Single-phase motors

Single-phase MS 402 motors incorporate a thermal switch and

require no additional motor protection.

Single-phase MS 4000 motors must be protected. A protective

device can either be incorporated in a control box or be separate.

Franklin 4" PSC motors must be connected to a motor-protective

circuit breaker.

6.2.2 Three-phase motors

MS motors are available with or without a built-in temperature

transmitter.

The following motors must be protected by a motor-protective

circuit breaker with thermal relay, or a MP 204 and contactor(s):

• motors with a built-in and intact temperature transmitter

• motors with or without a defective temperature transmitter

• motors with or without a Pt100 sensor.

MMS motors have no built-in temperature transmitter.

The Pt100 and the Pt1000 sensor are available as an accessory.

6.2.3 Required settings of motor-protective circuit breaker

For cold motors, the tripping time of the motor-protective circuit

breaker must be less than 10 seconds at 5 times the rated

maximum current of the motor. During normal operating

conditions the motor must be running at full speed in less than

3 seconds.

In order to ensure optimum motor protection, the motor-protective

circuit breaker should be set as follows:

1. Set the motor-protective circuit breaker to the rated maximum

current of the motor.

2. Start the pump and let it run for half an hour at normal

performance.

3. Slowly grade down the scale indicator until the motor trip point

is reached.

4. Increase the setting by 5 %.

The highest permissible setting is the rated maximum current of

the motor.

For motors wound for star-delta starting, the motor-protective

circuit breaker should be set as above, but the maximum setting

should be rated maximum current x 0.58.

The highest permissible startup time for star-delta starting or

autotransformer starting is 2 seconds.

Caution

If an MS motor with temperature transmitter is

connected to a frequency converter, a fuse

incorporated in the transmitter will melt and the

transmitter will be inactive. The transmitter cannot be

reactivated. This means that the motor will operate

like a motor without a temperature transmitter.

Caution

The motor should not run at a frequency higher than

the rated frequency (50 or 60 Hz) during frequency

converter operation. In connection with pump

operation, never reduce the frequency (and

consequently the speed) to such a level that the

necessary flow of cooling liquid past the motor is no

longer ensured.

Warning

MS 402 motors for supply voltages up to and

including 440 V (see motor nameplate) must be

protected against voltage peaks higher than

650 V (peak value) between the supply terminals.

Warning

When the motor has been thermally switched off, the

motor terminals are still live. When the motor has

cooled sufficiently, it will restart automatically.

Caution

If this requirement is not met, the motor warranty will

be invalidated.

English (GB)

6.3 Lightning protection

The installation can be fitted with a special overvoltage protective

device to protect the motor from voltage surges in the power

supply lines when lightning strikes somewhere in the area.

See fig. 10.

Fig. 10 Fitting an overvoltage protective device

The overvoltage protective device will not, however, protect the

motor against a direct stroke of lightning.

The overvoltage protective device should be connected to the

installation as close as possible to the motor and always in

accordance with local regulations. Ask Grundfos for lightning

protective devices.

MS 402 motors, however, require no further lightning protection

as they are highly insulated.

A special cable termination kit with a built-in overvoltage

protective device is available for Grundfos 4" motors

(product No 799911 or 799912).

6.4 Cable sizing

Make sure that the submersible drop cable can withstand

permanent submersion in the actual liquid and at the actual

temperature.

The cross-section (q) of the cable must meet the following

requirements:

The submersible drop cable must be sized to the rated maximum

current (In) of the motor.

The cross-section must be sufficient to make a voltage drop over

the cable acceptable.

Grundfos supplies submersible drop cables for a wide range of

installations. For correct cable sizing, Grundfos offers a cable

sizing tool on the USB stick supplied with the motor.

Fig. 11 Cable sizing tool

The sizing tool provides an accurate calculation of the voltage

drop at a given cross-section on the basis of the following

parameters:

• cable length

• operating voltage

• full-load current

• power factor

• ambient temperature.

You can calculate the voltage drop both for direct-on-line and

star-delta starting.

In order to minimise operating losses, the cable cross-section

may be increased. This is only cost-efficient if the borehole

provides the necessary space, and if the operating time of the

pump is long. The cable sizing tool also provides a power loss

calculator that shows the potential savings of an increased

cross-section.

As an alternative to the cable sizing tool, select the cross-section

on the basis of the current values of the given cables.

The cross-section of the submersible drop cable must be large

enough to meet the voltage quality requirements specified in

section 6. Electrical connection.

Determine the voltage drop for the cross-section of the

submersible drop cable by means of the diagrams on pages 17 to

20.

Use the following formula:

I = Rated maximum current of the motor.

For star-delta starting, I = rated maximum current of the motor x

0.58.

Lx = Length of cable converted to a voltage drop of 1 % of the

nominal voltage.

q = Cross-section of submersible drop cable.

Draw a straight line between the actual I-value and the Lx-value.

Where the line intersects the q-axis, select the cross-section that

lies right above the intersection.

The diagrams are made on the basis of the formulas:

Single-phase submersible motor

Three-phase submersible motor

TM00 1357 3605

Caution

Submersible motor cables are dimensioned for

submersion in liquid, and will not necessarily have

sufficient cross-section to be in free air.

TM05 8770 2613

825045 825017

L3 L

Three-phase Single-phase

Lx = length of drop cable

permissible voltage drop in %

L = U ×ΔU

I ×2 ×100 ×

L = U ×ΔU

I ×1.73 ×100 ×

L = Length of submersible drop cable [m]

U = Rated voltage [V]

ΔU = Voltage drop [%]

I = Rated maximum current of the motor [A]

cos φ=0.9

ρ= Specific resistance: 0.02 [Ωmm2/m]

q = Cross-section of submersible drop cable [mm2]

sin φ= 0.436

Xl = Inductive resistance: 0.078 x 10-3 [Ω/m].

cos 

---

sin XI+





cos 

---

sin XI+





English (GB)

6.5 Control of single-phase MS 402 motors

If a compressor is included in a control system together with an

ochre filter, the compressor will run continuously once the motor

protection has cut out the motor, unless other special precautions

have been taken.

6.6 Connection of single-phase motors

6.6.1 2-wire motors

MS 402 2-wire motors incorporate motor protection and a starter

device and can therefore be connected direct to the mains.

See fig. 12.

Fig. 12 2-wire motors

6.6.2 PSC motors

The PSC motors are connected to the mains via a run capacitor

which should be sized for continuous operation.

Select the correct capacitor size from the table below:

MS 402 PSC motors incorporate motor protection and should be

connected to the mains as shown in fig. 13.

Fig. 13 PSC motors

See www.franklin-electric.com and fig. 14.

Fig. 14 Franklin motors

6.6.3 3-wire motors

MS 4000 3-wire motors must be connected to the mains via a

Grundfos SA-SPM 5 (60 Hz), 7 or 8 (50 Hz) control box

incorporating motor protection.

MS 402 3-wire motors incorporate motor protection and should be

connected to the mains via a Grundfos control box SA-SPM 2, 3

or 5 (60 Hz), 7 or 8 (50 Hz) without motor protection.

Warning

The single-phase MS 402 motor incorporates motor

protection which cuts out the motor in case of

excessive winding temperatures while the motor is

still supplied with voltage. Allow for this, when the

motor forms part of a control system.

TM00 1358 5092

Motor

[kW] Capacitor

[μF] 400 V, 50 Hz

0.25 12.5

0.37 16

0.55 20

0.75 30

1.10 40

1.50 50

2.20 75

Yellow/green

Black

TM00 1359 5092TM00 1361 1200

Yellow/green

Grey

Black

Brown

Yellow/green

Black

Grey

Brown

English (GB)

6.7 Connection of three-phase motors

Three-phase motors must be protected.

See section 6.2.2 Three-phase motors.

For electrical connection via the MP 204, see the separate

installation and operating instructions for this unit.

When a conventional motor-protective circuit breaker is being

used, the electrical connection should be carried out as described

below.

6.7.1 Checking the direction of rotation

When the pump has been connected to the power supply, check

the direction of rotation:

1. Start the pump and measure quantity of water and head.

2. Stop the pump and interchange two phases.

3. Start the pump and measure quantity of water and head.

4. Stop the pump.

5. Compare the two results. The connection giving the larger

quantity of water and the higher head is the correct one.

6.7.2 Grundfos motors - direct-on-line starting

The connection of Grundfos motors wound for direct-on-line

starting appears from the table below and fig. 15.

Check the direction of rotation as described in section

6.7.1 Checking the direction of rotation.

Fig. 15 Grundfos motors - direct-on-line starting

6.7.3 Grundfos motors - star-delta starting

The connection of Grundfos motors wound for star-delta starting

appears from the table below and fig. 16.

Check the direction of rotation as described in section

6.7.1 Checking the direction of rotation.

Fig. 16 Grundfos motors wound for star-delta starting

If direct-on-line starting is required, the motors should be

connected as shown in fig. 17.

Fig. 17 Grundfos motors wound for star-delta starting -

direct-on-line starting

Caution

The pump must not be started until the suction

interconnector has been completely submerged in

the liquid.

Mains Cable/connection

Grundfos 4" and 6" motors

PE PE (yellow/green)

L1 U (brown)

L2 V (black)

L3 W (grey)

TM03 2099 3705

PE WVU

L3L2

Connection Grundfos 6" motors

PE Yellow/green

U1 Brown

V1 Black

W1 Grey

W2 Brown

U2 Black

V2 Grey

TM03 2100 3705TM03 2101 3705

L2L1

L3PE

W2 U2 V2

U1 W1V1

L2L1

L3PE

W2 U2 V2

U1 W1V1

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