Grundfos Unilift ap12 User manual

English (GB)

7

English (GB) Installation and operating instructions

Original installation and operating instructions.

CONTENTS Page

1. Symbols used in this document

2. General description

Fig. 1

2.1 Applications

The Grundfos Unilift AP pump is a single-stage

submersibl e pump designed for the pumping of

waste water.

The pump is capable of pumping water which

contains a limited quantity of solids, however not

stones and similar materials, without being blocked

or damaged.

The pump is available for automatic as well as

manual operation and can be installed in a

permanent installation or used as a portable pump.

1. Symbols used in this document 7

2. General description 7

2.1 Applications 7

2.2 Storage and operating conditions 8

2.3 Sound pressure level 8

3. Safety 8

4. Electrical connection 8

4.1 Checking of direction of rotation 9

5. Installation 9

5.1 Connection 9

5.2 Pump location 10

5.3 Setting of level switch 10

6. Start-up 11

7. Maintenance and service 11

7.1 Pump construction 11

7.2 Contaminated pumps 11

8. Fault finding chart 12

9. Disposal 12

Warning

Before beginning installation

procedures, these installation and

operating instructions should be

studied carefully. The installation and

operation should also be in accordance

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.

TM00 2913 1697

Discharge

port

Pump

sleeve

Suction

strainer

Level

switch

Handle with

clamp

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The pump is suitable for:

Incorrect application of the pump (e.g. resulting in

blocking of the pump) and wear are not covered by

the warranty.

2.2 Storage and operating conditions

2.3 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.

3. Safety

4. Electrical connection

The electrical connection should be carried out in

accordance with local regulations.

The pump must be connected to an external mains

switch. If the pump is not installed close to the

switch, this must be of a lockable type.

The operating voltage and frequency are marked on

the pump nameplate. Please make sure that the

motor is suitable for the electricity supply on which it

will be used.

Three-phase pumps must be connected to an

external motor starter with differential release and

with a minimum contact gap of 3 mm. The set

nominal current of the motor starter must correspond

to the electrical data marked on the pump

nameplate.

If a level switch is connected to a three-phase pump,

the motor starter must be magnetically operated.

Single-phase pumps incorporate thermal overload

protection and require no additional motor

protection.

Applications AP12 AP35 AP50

Groundwater lowering ●●●

Pumping in drainage pits ●●●

Pumping in surface

water pits with inflow

from roof gutters, shafts,

tunnels, etc.

●●●

Emptying of ponds,

tanks, etc. ●●●

Pumping of fibre-

containing waste water

from laundries and

industries

●●

Pumping of surface

water from septic tanks

and sludge treating

systems

●●

Pumping of domestic

waste water without

discharge from water

closets

●●

Pumping of domestic

waste water with

discharge from water

closets

●

Maximum particle size

[mm] 12 35 50

Warning

The pump must not be used in or at

swimming pools, garden ponds, etc.

when there are persons in the water.

Storage temperature: Down to –30 °C.

Minimum liquid

temperature: 0 °C.

Maximum liquid

temperature: +55 °C continuously.

Up to +70 °C for periods not

exceeding 3 minutes. Then

the pump must cool down.

Installation depth: Maximum 10 metres below

liquid level.

pH value: Between 4 and 10.

Density: Maximum 1100 kg/m³.

Viscosity: Maximum 10 mm²/s.

Technical data: See pump nameplate.

Warning

Pump installation in wells must be

carried out by specially trained

persons.

Caution

Depending on local regulations, a pump

with 10 metres of mains cable must be

used if the pump is used as a portable

pump for different applications.

Warning

As a precaution, the pump must be

connected to a socket with earth

connection. The permanent installation

must be fitted with an earth leakage

circuit breaker (ELCB) with a tripping

current < 30 mA.

Warning

If the motor is overloaded, it will stop

automatically. When it has cooled to

normal temperature, it will restart

automatically.

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4.1 Checking of direction of rotation

(Three-phase pumps only)

The direction of rotation should be checked every

time the pump is connected to a new installation.

Check the direction of rotation as follows:

1. Position the pump so that the impeller can be

observed.

2. Start the pump for a short period.

3. Observe the rotation of the impeller. The correct

direction of rotation is indicated by an arrow on

the suction strainer (clockwise when seen from

the bottom). If the impeller rotates in the wrong

direction, reverse the direction of rotation by

interchanging two of the phases to the motor.

If the pump is connected to a piping system, the

direction of rotation can be checked as follows:

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

the discharge pressure.

2. Stop the pump and interchange two of the

phases to the motor.

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

the discharge pressure.

4. Stop the pump.

Compare the results taken under points 1 and 3. The

connection which gives the larger quantity of water

or the higher pressure is the correct direction of

rotation.

5. Installation

5.1 Connection

For permanent installation, it is recommended to fit a

union, a non-return valve and an isolating valve in

the discharge pipe.

If the pump is installed in a pit with a minimum free

cable length of 100 mm, see fig. 6, the minimum pit

dimensions must be as shown in fig. 2.

Furthermore, the pit should be dimensioned

according to the relation between the water flow to

the pit and the pump capacity.

Fig. 2

Warning

The installation of the pump must be

carried out by specially trained

persons.

Unilift AP35 and AP50: Care must be

taken to ensure that persons cannot

come into contact with the pump

impeller.

TM00 2918 1697

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550 mm

600 mm

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5.2 Pump location

The pump can be used in vertical or horizontal

position with the discharge port as the highest point

of the pump, see fig. 3.

During operation, the suction strainer must always

be completely covered by the pumped liquid.

Fig. 3

When the pipe/hose has been connected, place the

pump in its operating position.

Position the pump so that the suction strainer will not

be blocked or partly blocked by sludge, mud or

similar materials.

In the case of permanent installation, the pit must be

cleared of sludge, pebbles, etc. before the pump is

installed.

It is recommended to place the pump on a solid

base, see fig. 4.

The pump must not be installed hanging from the

discharge pipe.

Fig. 4

5.3 Setting of level switch

For pumps supplied with a level switch, the

difference in level between start and stop can be set

by adjusting the free cable between the level switch

and the pump handle.

The longer the length of free cable, the larger the

difference in level between start and stop.

Maximum length of free cable: 350 mm, see fig. 5.

Minimum length of free cable: 100 mm, see fig. 6.

The stop level must be above the suction strainer to

prevent the pump from taking in air.

Fig. 5

Fig. 6

TM00 2920 0794

Caution

Do not lift the pump by means of the

electric cable.

TM00 2922 0794

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TM00 2924 1697TM00 2926 1697

100 mm

450 mm

Max. 350 mm

Start

Stop

300 mm

200 mm

Min. 100 mm

Start

Stop

English (GB)

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6. Start-up

Open the isolating valve, if fitted, and check the level

switch setting.

7. Maintenance and service

Before carrying out maintenance and service, it must

be ensured that the pump has been thoroughly

flushed with clean water. Rinse the pump parts in

water after dismantling.

Check the pump and replace the oil once a year.

If the pump is used for pumping liquids containing

abrasive particles or it is operating continuously, the

pump must be checked at shorter intervals.

In the case of long operating time or continuous

operation, the oil should be replaced as follows:

The pump contains approx. 60 ml non-poisonous oil.

Used oil must be disposed of in accordance with

local regulations.

If the drained oil contains water or other impurities,

the shaft seal should be replaced.

7.1 Pump construction

The construction of the pump will appear from the

table below and figs. A, B and C at the end of these

instructions.

7.2 Contaminated pumps

If Grundfos is requested to service the pump,

Grundfos must be contacted with details about the

pumped liquid, etc. before the pump is returned for

service. Otherwise Grundfos can refuse to accept

the pump for service.

Possible costs of returning the pump are paid by the

customer.

However, any application for service (no matter to

whom it may be made) must include details about

the pumped liquid if the pump has been used for

liquids which are injurious to health or toxic.

Caution

Before starting the pump, check that

the suction strainer is fitted to the

pump and submerged in the pumped

liquid.

Note

The pump may be run briefly to check

the direction of rotation without being

submerged in the pumped liquid.

Warning

Before starting work on the pump,

make sure that the electricity supply to

the pump has been switched off and

that it cannot be accidentally switched

on.

Liquid

temperature The oil should be replaced

after

20 °C 4500 operating hours

40 °C 3000 operating hours

55 °C 1500 operating hours

Warning

Out of consideration for the personal

safety and health, this work must be

carried out by specially trained

persons. Furthermore, all rules and

regulations covering safety, health and

environment must be observed.

During dismantling, caution should be

exercised as there will be access to

sharp edges, etc. which may cut.

Pos. Description

6 Pump housing

37a O-ring

49 Impeller

55 Pump sleeve with motor

66 Washer

67 Lock nut

84 Suction strainer

105 Shaft seal

182 Level switch

188a Screws

193 Screws

Caution

If a pump has been used for a liquid

which is injurious to health or toxic, the

pump will be classified as

contaminated.

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8. Fault finding chart

9. Disposal

Disposal of this product or parts of it must be carried

out according to the following guidelines:

1. Use the local public or private waste collection

service.

2. In case such waste collection service does not

exist or cannot handle the materials used in the

product, please deliver the product or any

hazardous materials from it to your nearest

Grundfos company or service workshop.

Fault Cause Remedy

1. Motor does not

start.

a) No electricity supply. Connect the electricity supply.

b) Motor switched off by level switch. Adjust/replace the level switch.

c) Fuses are blown. Replace fuses.

d) Motor protection/thermal relay has

tripped out.

Wait until the motor protection trips in

again/reset the relay.

e) Impeller blocked by impurities. Clean the impeller.

f) Short-circuit in cable or motor. Replace the defective part.

2. Motor protection/

thermal relay

trips out after

short time of

operation.

a) Temperature of pumped liquid too high. Use another pump type.

b) Impeller blocked or partly blocked by

impurities.

Clean the pump.

c) Phase failure. Call an electrician.

d) Voltage too low. Call an electrician.

e) Overload setting of the motor starter too

low.

Adjust the setting.

f) Incorrect direction of rotation.

See section 4.1 Checking of direction of

rotation.

Reverse the direction of rotation.

3. Pump runs

constantly or

gives

insufficient water.

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

b) Discharge pipe or valve partly blocked

by impurities.

Clean the discharge pipe.

c) Impeller not properly fixed to the shaft. Tighten the impeller.

d) Incorrect direction of rotation.

See section 4.1 Checking of direction of

rotation.

Reverse the direction of rotation.

e) Incorrect setting of level switch. Adjust the level switch.

f) Pump too small for the application. Replace the pump.

g) Impeller worn. Replace the impeller.

4. Pump runs but

gives no water.

a) Pump blocked by impurities. Clean the pump.

b) Discharge pipe or non-return valve

blocked by impurities.

Clean the discharge pipe.

c) Impeller not properly fixed to the shaft. Tighten the impeller.

d) Air in pump. Vent the pump and the discharge

pipe.

e) Liquid level too low. The suction strainer

is not completely submerged in the

pumped liquid.

Submerge the pump in the liquid or

adjust the level switch.

f) Level switch does not move freely. Make the level switch move freely.

Subject to alterations.

Grundfos Unilift AP12 User manual

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