Grundfos LSV Series Bedienungsanleitung

LSV

Single-stage vertical split case pump and double-stage vertical

split case pump

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

LSV

English (GB)

Installation and operating instructions ..................................4

Table of contents

English (GB) Installation and operating instructions

Original installation and operating instructions

Table of contents

1. General information ............. 5

1.1 Hazard statements .............. 5

1.2 Notes ..................... 5

2. Receiving the product............ 5

2.1 Inspecting the product ............ 5

2.2 Temporary storage .............. 6

3. Installing the product ............ 6

3.1 Location .................... 6

3.2 Mechanical installation ............ 6

3.3 Electrical connection .............10

3.4 Pipes .....................11

3.5 Inlet pipe guidelines..............13

4. Starting up the product ...........16

4.1 General information..............16

4.2 Prestart checks ................16

4.3 Priming ....................17

4.4 Startup.....................17

4.5 Alignment ...................18

5. Product introduction ............19

5.1 Applications ..................19

5.2 Pumped liquids ................19

5.3 Identification..................20

6. Servicing the product ............25

6.1 Contaminated pumps .............25

6.2 Operating checks ...............25

6.3 Maintaining the product............25

7. Taking the product out of operation ....27

7.1 Short-term shutdown .............27

7.2 Long-term shutdown .............27

8. Fault finding the product ..........28

8.1 The pump delivers no liquid .........28

8.2 The pump does not deliver enough liquid ..28

8.3 The pump does not create enough

pressure ....................29

8.4 The pump loses liquid after running for a

short time ...................30

8.5 The pump consumes too much power ....30

8.6 The motor is overloaded ...........31

8.7 Vibrations ...................31

8.8 Cavitation noise ................32

8.9 The pump bearings are overheated .....32

8.10 The pump operates for a short time and

then stops ...................32

9. Technical data ................33

9.1 Operating conditions .............33

9.2 Flange forces and torques ..........35

10. Disposing of the product ..........36

English (GB)

1. General information

Read this document before you install the

product. Installation and operation must

comply with local regulations and accepted

codes of good practice.

Grundfos LSV vertical split-case pumps are supplied

either as a complete pump with motor, base frame

and approved coupling guard or as a bare-shaft

pump.

These instructions apply to both types.

The LSV pump can be driven by an electric motor or

another type of driver. In the following we assume

that the pump is driven by an electric motor.

1.1 Hazard statements

The symbols and hazard statements below may

appear in Grundfos installation and operating

instructions, safety instructions and service

instructions.

DANGER

Indicates a hazardous situation which, if

not avoided, will result in death or serious

personal injury.

WARNING

Indicates a hazardous situation which, if

not avoided, could result in death or seri-

ous personal injury.

CAUTION

Indicates a hazardous situation which, if

not avoided, could result in minor or mod-

erate personal injury.

The hazard statements are structured in the following

way:

SIGNAL WORD

Description of the hazard

Consequence of ignoring the warning

• Action to avoid the hazard.

1.2 Notes

The symbols and notes below may appear in

Grundfos installation and operating instructions,

safety instructions and service instructions.

Observe these instructions for explosion-

proof products.

A blue or grey circle with a white graphical

symbol indicates that an action must be

taken.

A red or grey circle with a diagonal bar,

possibly with a black graphical symbol, in-

dicates that an action must not be taken or

must be stopped.

If these instructions are not observed, it

may result in malfunction or damage to the

equipment.

Tips and advice that make the work easier.

2. Receiving the product

2.1 Inspecting the product

The pump is delivered from the factory in a crate or a

wooden box specially designed for transport by a

forklift truck or a similar vehicle.

Upon receipt, check the pump visually to determine

whether any damage has happened to it during

transport or handling.

Check especially for these points:

1. broken or cracked equipment, including base

frame, motor or pump feet and flanges

2. broken motor fan cover, bent eyebolts or

damaged terminal box

3. missing parts.

Parts or accessories are sometimes wrapped

individually or fastened to the equipment.

If any damage or losses have occurred, notify

Grundfos' representative and the carrier's agent at

once.

Bolts for LSV bare-shaft pumps have US

threads for which inch tools are required.

Bolts for coupling guard and for mounting

of pump and motor on the base frame

have metric threads.

English (GB)

2.2 Temporary storage

If you do not store or operate the pump soon after

arrival, store it in a clean, dry place with slow,

moderate changes in ambient temperature. Protect

the pump from moisture, dust, dirt and foreign bodies.

Avoid exposing the motor to direct, intense sunlight,

rain, snow, ice and also dust for an extended periods

of time. Attach a covering structure or an additional

cover when using or storing the product outdoors.

Before and during storage we recommend these

precautions:

1. Make sure that the bearings are filled with the

recommended grease to prevent moisture from

entering around the shaft. See section

Lubrication.

2. Make sure that the inlet and outlet ports and all

other openings are covered with cardboard, wood

or masking tape to prevent foreign objects from

entering the pump.

3. Cover the unit with a tarpaulin or other suitable

covering if it is to be stored where there is no

protective covering.

4. Rotate the shaft two turns every two weeks to

prevent corrosion of the bearing surfaces and the

stuffing box or sticking of the shaft seal faces.

3. Installing the product

3.1 Location

Install the pump with accessibility for inspection and

maintenance. Allow ample space and headroom for

the use of an overhead crane or hoist sufficiently

strong to lift the unit.

Install the pump as close as possible to the pump

liquid supply, so that the inlet pipe is as short and

direct as possible.

3.2 Mechanical installation

WARNING

Crushing of hands

Death or serious personal injury

‐Make sure that all installations are per-

formed by persons experienced in the

placement, alignment and connection

of pumping equipment.

3.2.1 Lifting the product

WARNING

Crushing of hands

Death or serious personal injury

‐Handling must be performed by quali-

fied persons.

‐When unloading the pump, lift equally

at four or more points on the base

frame. Do not lift by the motor or by the

pump. Do not lift by the flanges or by

the eyebolts on the motor.

WARNING

Crushing of hands

Death or serious personal injury

‐Make sure the product won't tilt and fall

down during transportation, installation

and unloading.

‐The unsecured pump must be placed

on horizontal plane to prevent it from

tilting and fall down.

Lift the pump by means of nylon straps and shackles.

TM073980

How to lift and handle the LSV pumps

English (GB)

TM073981

How to lift and handle the LSV bare-shaft pumps by

means of a U-type unbuckle

TM073976

How to lift and handle the LSV bare-shaft pumps by

means of the pump flange

TM073975

How to lift and handle the LSV bare-shaft pumps by

means of the pump flange and hanging ear

English (GB)

TM073977

Lifting the motor

3.2.2 Foundation

We recommend that you install the pump on a

concrete foundation, which is heavy enough to

provide permanent and rigid support for the entire

pump. The foundation must be capable of absorbing

any vibration, normal strain or shock. We recommend

that the weight of the concrete foundation is 3 times

the weight of the complete pump unit. For specific

requirements, consult the contractor, engineer, or

established industry standards.

In installations where silent operation is particularly

important, we recommend a foundation that is up to 5

times as heavy as the complete pump unit.

3.2.3 Vibration dampers

Vibration dampers may be required to prevent pump

vibrations from being transmitted to the building or the

pipes. In order to select the right type of vibration

damper, you need this information:

• Forces transmitted through the damper.

• Motor speed. Take the motor speed into account

in the case of speed control.

• Desired dampening in %. The recommended

value is 70 %.

The choice of vibration dampers differs from

installation to installation. In certain cases a wrong

damper may increase the vibration level. Vibration

dampers must therefore be sized by the supplier of

the vibration dampers.

3.2.4 Expansion joints

Expansion joints provide these advantages:

• absorption of thermal expansion and contraction

of pipes caused by variations in liquid temperature

• reduction of mechanical influences in connection

with pressure surges in the pipes

• isolation of structure-borne noise in the pipes

(only rubber bellows expansion joints).

Do not fit expansion joints to make up for

inaccuracies in the pipes, such as centre

displacement or misalignment of flanges.

Fit the expansion joints at a minimum distance of 2

pipe diameters (DN) away from the pump flange on

the inlet side. This prevents turbulence in the joints

ensuring optimum inlet conditions and minimum

pressure drop on the outlet side.

At flow velocities greater than 2.4 m/s, we

recommend that you fit larger expansion joints

matching the pipes.

English (GB)

3.2.5 Building up the foundation

The foundation procedure has three steps:

1. pouring of foundation

2. shimming of base frame

3. grouting.

Pouring of foundation

We recommend the following procedure to ensure a

good foundation:

1. Pour the foundation without interruptions to within

19-32 mm of the final level. Use vibrators to

ensure that the concrete is evenly distributed. The

top surface must be well scored and grooved

before the concrete sets. This provides a bonding

surface for the grout.

2. Embed anchor bolts in the concrete as shown in

figures below. Allow enough bolt length to reach

through grout, shims, lower base frame, nuts and

washers.

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TM075514

Typical anchor bolt design

Pos. Description

1 Bolt length above base frame

2 Thickness of base frame

3 19 to 32 mm allowance for grout

4 Washer

5 Lug

6 Pipe sleeve

7 Top of foundation left rough

8 Wedges and shims left in place

9 Base frame

10 5-10 mm

TM066124

LSV anchor bolt installation

Pos. Description

1 LSV stands

2 Grouted pad for anchoring or housekeeping

3 Wedges or shims, as required

4 Anchor bolts for supporting the base

Let the foundation cure for several days before the

base frame is shimmed and grouted.

Shimming of base frame

TM074091

Shimming of base frame and levelling of pump

1. Lift or jack up the base frame to the final level

19-32 mm above the concrete foundation, and

support the base frame by means of blocks and

shims, both at the anchor bolts and midway

between bolts. See figure above .

2. Level the base frame by adding or removing

shims under the base frame. See figure above.

3. Tighten the anchor bolt nuts against the base

frame. Make sure the pipes can be aligned to the

pump flanges without putting strain on the pipes

or flanges.

English (GB)

Grouting

Grouting compensates for uneven foundation,

distributes the weight of the unit, dampens vibrations

and prevents shifting. Use an approved, non-

shrinking grout. If you have questions or doubts about

the grouting, consult an expert on grouting.

Proceed as follows:

1. Build a strong formwork around the foundation to

contain the grout.

2. Soak the top of the concrete foundation

thoroughly, then remove surface water.

3. Fill the formwork with grout up to the bottom edge

of the base frame. See figure below. Allow the

grout to dry thoroughly before attaching the pipe

to the pump. 24 hours is sufficient time with

approved grouting procedure.

4. When the grout has thoroughly hardened, check

the anchor bolt nuts and tighten them if

necessary.

5. Approximately two weeks after the grout has been

poured, or when the grout has thoroughly dried,

apply an oil-based paint to the exposed edges of

the grout to prevent air and moisture from getting

in contact with the grout.

TM082324

Sectional view of foundation with anchor bolt,

grouting and base frame

Pos. Description

1 Base frame

2 Grout

3 Levelling wedges or shims left in place

4 Top of foundation left rough

5 19 to 32 mm grout

6 Formwork

7 5-10 mm

3.3 Electrical connection

The electrical connections must be carried out by an

authorised electrician in accordance with local

regulations.

DANGER

Electric shock

Death or serious personal injury

‐Before you remove the terminal box

cover and before you remove or dis-

mantle the pump, make sure that the

power supply has been switched off

and that it cannot be accidentally

switched on.

The operating voltage and frequency are marked on

the motor nameplate.

Make sure that the motor is suitable for the power

supply of the installation site.

Carry out the electrical connections as shown on the

motor nameplate or in the wiring diagram on the back

of the terminal box cover.

For further information, contact the motor supplier.

DANGER

Electric shock

Death or serious personal injury

‐Whenever you use powered equipment

in explosive surroundings, observe the

rules and regulations generally or spe-

cifically imposed by the relevant re-

sponsible authorities or trade organisa-

tions.

English (GB)

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