Grundfos Unilift KP 150 User manual

Unilift KP 150, KP 250, KP 350

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

2

English (GB) Installation and operating instructions

Original installation and operating instructions.

CONTENTS

Page

1. Symbols used in this document

2. Unilift KP pumps

Grundfos Unilift KP pump series is available in these

versions:

Fig. 1 Pumps with level switch

1. Symbols used in this document 2

2. Unilift KP pumps 2

3. Application 3

3.1 Pumped liquids 3

4. Functions 3

5. Operating conditions 3

5.1 Sound pressure level 3

6. Installation 4

6.1 Space requirement 4

6.2 How to place the pump 4

6.3 Connection of discharge pipe 4

6.4 Start/stop level 5

6.5 Electrical connection 5

7. Operation 6

7.1 Unilift KP-A 6

7.2 Unilift KP-AV 6

7.3 Unilift KP-M 6

8. Maintenance 7

8.1 Cleaning the pump 7

8.2 Service 8

9. Fault finding 9

10. Disposal 9

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

The use of this product requires

experience with and knowledge of the

product.

Persons with reduced physical,

sensory or mental capabilities must not

use this product, unless they are under

supervision or have been instructed in

the use of the product by a person

responsible for their safety.

Children must not use or play with this

product.

Warning

If these safety instructions are not

observed, it may result in personal

injury.

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.

• Unilift KP-A with float switch

(automatic operation)

• Unilift KP-AV with vertical level switch

(automatic operation)

• Unilift KP-M without level switch

(manual operation).

TM01 1107 1205

Pos. Description

1 Discharge port, Rp 1 1/4

2 Handle

3 Cable clamp

4 Suction strainer

5 Pump sleeve

6 Float switch

7 Vertical level switch

Unilift KP-A

with float switch

Unilift KP-AV with

vertical level switch

English (GB)

3

3. Application

Unilift KP 150, KP 250 and KP 350 are single-stage

submersible pumps designed for the pumping of

grey wastewater.

The Unilift KP pump can pump water with a limited

content of solid particles up to 10 mm diameter

without being clogged or damaged.

The pump can be used for automatic as well as

manual operation and is suitable for both permanent

and temporary use.

The pump is designed for the following applications:

• pumping in drain tanks

• pumping of wastewater from washing machines,

baths, sinks, etc. from low-lying parts of buildings

up to sewer level

• drainage of flooded cellars or buildings

• pumping in surface water drain tanks with inlets

from roof gutters, tanks, tunnels, etc.

• emptying of swimming pools, ponds or fountains.

3.1 Pumped liquids

The pump is not suitable for these liquids:

• liquids containing long fibres

• inflammable liquids (oil, petrol, etc.)

• aggressive liquids.

4. Functions

Unilift KP-A

Automatic on/off operation via a float switch.

Unilift KP-AV

Automatic start/stop operation via vertical level

switch.

Unilift KP-M

Manual operation via external on/off switch.

5. Operating conditions

Liquid temperature

Min. 0 °C.

Maximum liquid temperature depends on the rated

voltage of the pump. See this table:

1) Voltage variant for Unilift KP 350

Storage temperature

-20 °C to +70 °C.

Installation depth

Max. 10 m below liquid level.

5.1 Sound pressure level

The sound pressure level of the pump is lower than

the limiting values stated in the EC Council Directive

2006/42/EC relating to machinery.

Warning

Do not use the pump in or at swimming

pools, garden ponds, etc. when there

are persons in the water.

Note

The pump contains approx. 70 ml of

non-toxic rotor liquid which will be

mixed with the pumped liquid in case

of a leak.

Voltage

Max. liquid

temperature

[°C]

1 x 100 V, 50 Hz

1 x 110 V, 50 Hz

1 x 100-110 V, 50 Hz1)

1 x 220-230 V, 50 Hz

1 x 220-240 V, 50 Hz, 50 Hz1)

1 x 230-240 V, 50 Hz

+35

+40

+50

1 x 100 V, 60 Hz

1 x 115 V, 60 Hz

1 x 220 V, 60 Hz

+35

+50 (KP 350: +45)

+40

3 x 200 V, 50 Hz

3 x 380-400 V, 50 Hz1)

3 x 380-415 V, 50 Hz

+35

+50

3 x 200 V, 60 Hz +35

At intervals of at least 30 minutes, the pumps are

allowed, however, to run at max. +70 °C for periods

not exceeding 2 minutes.

Caution

Always have at least 3 m free cable

above liquid level. This limits

installation depth to 7 m for pumps

with 10 m cable and to 2 m for pumps

with 5 m cable.

Caution

Pumps with 3 m cable are for industrial

applications only.

English (GB)

4

6. Installation

6.1 Space requirement

6.1.1 Unilift KP-A

If the pump is installed in a tank, the minimum

dimensions of the tank should be as shown in fig. 2

to ensure free movability of the float switch. Figure 3

shows a pump with vertical level switch.

Fig. 2 Min. tank dimensions for Unilift KP-A

Fig. 3 Min. tank dimensions for Unilift KP-AV

6.1.2 Unilift KP-M

The pump requires no more space than the physical

dimensions of the pump. See page 10.

6.2 How to place the pump

Unilift KP-A and Unilift KP-M can be used in vertical

position with the discharge port pointing upwards.

The pumps may also be used in horisontal or tilted

position with the discharge port as the highest point.

See fig. 4.

Fig. 4 How to place Unilift KP-A and

Unilift KP-M

Place the pump so that the suction strainer is not

covered in sludge, mud or similar materials. This can

be ensured by placing the pump on bricks, an iron

plate, or similar. See fig. 5.

Fig. 5 Pump placed on a plate

6.3 Connection of discharge pipe

Fit the discharge pipe or hose in the Rp 1 1/4

discharge port. Steel pipes can be screwed directly

into the pump discharge port.

In case of a permanent installation, fit a union to the

discharge pipe to facilitate mounting and removal.

If a hose is used, fit a hose union.

In a permanent installation with level switch, fit a

non-return valve to the discharge pipe or hose.

Caution

Do not install the pump hanging from

the electric cable or the discharge pipe.

Do not lower or lift the pump by means

of the electric cable. Lift the pump

using the pipe/hose or a rope secured

to the pump handle.

Note

According to EN 60335-2-41/A2:2010,

this product with 5 metres of mains

cable may be used only for indoor

applications.

TM03 4445 2106TM01 1109 1098

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400 mm

350 mm

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ø 250 mm

400 mm

∅250 mm

400 mm

TM00 1548 0493

Caution

Always place Unillift KP-AV in vertical

position.

TM00 1549 0493

Caution

The pump must not be installed

hanging from the discharge pipe.

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English (GB)

5

6.4 Start/stop level

6.4.1 Unilift KP-A

The level difference between start and stop can be

adjusted by changing the free cable length between

the pump handle and the float switch.

• A long free cable length gives fewer starts/stops

and a large level difference.

• A short free cable length gives frequent starts/

stops and a small level difference.

To enable the float switch to start and stop the pump,

the free cable length (L) must be min. 70 mm and

max. 150 mm. See fig. 6.

Fig. 6 Start/stop levels, Unilift KP-A

6.4.2 Unilift KP-AV

The level difference for pumps with vertical level

switch cannot be adjusted. Start/stop levels appear

from fig. 7.

Fig. 7 Start/stop levels KP-AV

* For Unilift KP 350.

6.5 Electrical connection

The electrical connection must be carried out in

accordance with local regulations and standards.

Check that the mains voltage and frequency

correspond to the values stated on the pump

nameplate.

The pump motor incorporates thermal overload

protection and requires no additional motor

protection.

If the motor is overloaded, it will stop automatically.

Motors for Unilift KP 350, 3 x 200 V, 50 Hz, must be

connected to a motor-protective circuit breaker.

Three-phase pumps with float switch (Unilift KP-A)

must be connected to the mains supply by means of

a contactor. See fig. 8.

Fig. 8 Wiring diagram

TM03 4446 2106

Pump type

Cable length

(L)

min. 70 mm

Cable length

(L)

max. 150 mm

Start

[mm]

Stop

[mm]

Start

[mm]

Stop

[mm]

Unilift KP 150 A

Unilift KP 250 A 290 140 335 100

Unilift KP 350 A 300 150 345 110

TM01 1108 3797

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L

Start

Stop

Start

Stop

80 mm

100 mm

Start

80 mm

100 mm (110 mm*)

Stop

Warning

The pump must be connected to an

external mains switch with a minimum

contact gap of 3 mm in all poles.

As a precaution, all pumps must be

connected to a socket with earth

connection.

Note

We recommend to fit permanent

installations with an earth leakage

circuit breaker (ELCB) with a tripping

current < 30 mA.

Warning

Pumps for swimming pools, outdoor

fountains, garden ponds and similar

applications must be provided with an

earth leakage circuit breaker (ELCB)

with a tripping current < 30 mA.

Note

When the motor has cooled to normal

temperature, it will restart

automatically.

TM00 2011 3793

Yellow/green

Blue

Brown

Black

English (GB)

6

6.5.1 How to check the direction of rotation

(Three-phase pumps only)

Check the direction of rotation every time the pump

is connected to a new installation.

Check the direction of rotation like this:

1. Place the pump on a plane surface.

2. Start and stop the pump.

3. Observe the pump when started. If the pump

gives a slight clockwise jerk, see fig. 9, the

direction of rotation of the motor is correct. If the

jerk is counter-clockwise, interchange two

phases in the mains connection.

Fig. 9 Direction of rotation

If the pump is connected to a piping system, carry

out the check of direction of rotation in this way:

1. Start the pump and check the quantity of water.

2. Stop the pump and interchange two phases in the

mains connection.

3. Start the pump and check the quantity of water.

4. Stop the pump.

5. Compare the results taken under points 1 and 3.

The largest quantity of water indicates the correct

direction of rotation.

7. Operation

7.1 Unilift KP-A

The pump will start and stop automatically,

depending on the liquid level and the cable length of

the float switch.

Forced operation

If the pump is used for draining liquid below the stop

level of the float switch, the float switch can be held

in a higher position by fastening it to the pump

discharge pipe.

During forced operation, the liquid level should be

checked regularly to avoid dry running.

7.2 Unilift KP-AV

The pump starts and stops automatically depending

on the liquid level.

7.3 Unilift KP-M

The pump is started and stopped via an external

switch.

To avoid dry running, check the liquid level regularly

during operation, for instance via external level

monitoring.

To enable the pump to self-prime during start-up, the

liquid level must be at least 30 mm.

The pump can pump down to a liquid level of 15 mm.

TM03 4482 2206

A

R

56

DIN EN 12050-2

10m

IP68

Ins cl X

Hmax xx mP1 XXXX XXXX

Omax XX m /h

Tmax XX° C

U XXXXXXXXXX 50 Hz

XXXXX

Serial no XXXXXXXXXXXX

TYPE UNILIFT KP XXX

Made in XXXXXX

3

English (GB)

7

8. Maintenance

Under normal operating conditions, the pump is

maintenance-free.

If the pump has been used for liquids other than

clean water, it should be flushed through with clean

water immediately after use.

8.1 Cleaning the pump

If the pump delivers too little water due to deposits or

the like, dismantle and clean the pump:

1. Disconnect the power supply.

2. Drain the pump.

3. Remove the suction strainer.

Press a screwdriver in between the pump sleeve

and the strainer and press hard. Do the same in

several places along the strainer until it is pried

loose and can be removed.

See fig. 10.

Fig. 10 How to remove the suction strainer

4. Clean the suction strainer and fit it again.

If the pump still delivers too little water, dismantle the

pump further.

Procedure:

1. Disconnect the power supply.

2. Remove the suction strainer (see point 3 above).

3. Turn the pump housing 90 ° counter-clockwise

using a screwdriver, see the arrow on the pump

housing. Pull off the pump housing. See fig. 11.

Fig. 11 How to remove the pump housing

4. Clean and flush the inside of the pump to remove

possible impurities between motor and pump

sleeve. Clean the impeller. See fig. 12.

Fig. 12 How to flush the pump

5. Check that the impeller can rotate freely. If not,

remove the impeller. See point 6.

Warning

For safety reasons the suction strainer

must always be fitted to the pump

during operation.

Never dismantle the pump unless the

power supply has been switched off.

Be careful during dismantling as you

will get access to sharp edges, etc.,

which may cause cuts. Wear protective

gloves.

Warning

Before starting any work on the pump,

make sure that the power supply has

been switched off and that it cannot be

accidentally switched on.

TM03 1167 1205

TM03 1168 1205TM03 1169 1205

Pump housing

English (GB)

8

6. Unscrew the nut (cross width 13 mm) from the

motor shaft. Use a screwdriver to prevent the

impeller from turning. See fig. 13.

Fig. 13 How to remove the impeller

7. Clean the impeller and clean around the shaft.

8. Check the impeller, the pump housing and the

sealing part. If necessary, replace defective

parts.

9. Assemble the pump in the reverse order of the

dismantling.

8.2 Service

The impeller, the suction strainer and the non-return

valve are replaceable.

Order numbers for the ordering of service kits and

contents of service kits appear from the tables below

and fig. 14.

If other pump components are damaged or defective,

please contact the pump supplier.

Fig. 14 Service parts

TM03 1170 1205

Caution

Before and during the mounting of the

pump housing, check that the sealing

part is fitted correctly. See fig. 14.

Moisten the sealing part with water to

ease the fitting.

Pump type Part number

Impeller kit

Unilift KP 150

Unilift KP 250

Unilift KP 350

015778

015779

015787

Suction strainer

Unilift KP 150

Unilift KP 250 96548064

Unilift KP 350 96548066

Non-return valve

Unilift KP 150

Unilift KP 250

Unilift KP 350

15220

Service kits Pos. Designation Quantity

Impeller kit

A Impeller 1

BNut 1

C Sealing part 1

Suction

strainer DSuction

strainer 1

TM03 1166 1205

Note

Cable and level switch must be

replaced by an authorised Grundfos

service workshop.

D

C

B

A

English (GB)

9

9. Fault finding

10. Disposal

This product or parts of it must be disposed of in an

environmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest

Grundfos company or service workshop.

Subject to alterations.

Warning

Before starting fault finding, the power supply must be switched off. Make sure that the

power supply cannot be accidentally switched on again.

Fault Cause Remedy

1. Motor does not start. a) Power supply disconnected. Connect the power supply.

b) Pump stopped by level switch. Unilift KP-A: Start the pump by

lifting the float switch.

See 7.1 Unilift KP-A.

c) Fuses in installation are blown. Replace the fuses.

d) Thermal switch tripped. Wait until the thermal switch cuts in

again or let the pump cool off.

See 6.5 Electrical connection.

2. The thermal switch trips

out after short time of

operation.

a) The temperature of the pumped

liquid is higher than the value

stated in section 5. Operating

conditions.

The pump starts automatically after

sufficient cooling.

b) Pump is partly blocked by

impurities.

Clean the pump.

See 8. Maintenance.

c) The pump is mechanically

blocked.

Remove the blockage.

See 8. Maintenance.

3. Pump runs but delivers

too little water.

a) Pump is partly blocked by

impurities.

Clean the pump.

See 8. Maintenance.

b) Discharge pipe/hose partly

blocked.

Check and clean the non-return

valve, if fitted.

c) Wrong direction of rotation in

three-phase pumps.

See 6.5.1 How to check the

direction of rotation.

Reverse the direction of rotation.

4. The pump runs but

delivers no water.

a) Pump is blocked by impurities. Clean the pump.

See 8. Maintenance.

b) Discharge pipe/hose partly

blocked.

Check and clean the non-return

valve, if fitted.

c) Liquid level too low.

During normal operation, the

suction strainer must be covered

by the pumped liquid.

Lower the pump deeper into the

liquid or adjust the level switch.

d) Unilift KP-A: Free cable length

of the float switch is too long.

Reduce the free cable length.

See 6.4 Start/stop level.

Appendix

10

Appendix 1

Dimensions

Unilift KP-AV Unilift KP-M

* Unilift KP 350

TM01 1523 4502

TM00 1642 1093

31

149

236

214

140215

Rp 1 1/4

148

30

220 (230*)

256 (266*)

148

30

140

Rp 1

220

226

14

226 (236*)

220 (230*)

1 1/4

Grundfos Unilift KP 150 User manual

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