Grundfos BMST Assembly, Installation And Operating Instructions

Brand: Grundfos

Model: BMST

Type: Assembly, Installation And Operating Instructions

This manual is also suitable for

BMS

BMS hs, BMS hp, BMST and BMSX

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions

These installation and operating instructions describe Grundfos

BMS.

Sections 1-5 give the information necessary to be able to unpack,

install and start up the product in a safe way.

Sections 6-12 give important information about the product, as

well as information on service, fault finding and disposal of the

product.

CONTENTS

Page

1. General information

1.1 Hazard statements

The symbols and hazard statements below may appear in

Grundfos installation and operating instructions, safety

instructions and service instructions.

The hazard statements are structured in the following way:

1.2 Notes

The symbols and notes below may appear in Grundfos

installation and operating instructions, safety instructions and

service instructions.

1. General information

1.1 Hazard statements

1.2 Notes

2. Receiving the product

2.1 Transporting the product

2.2 Inspecting the product

3. Installing the product

3.1 Reading guide

3.2 Foundation

3.3 Mechanical installation

3.4 Electrical installation

4. Commissioning the product

4.1 Checking the power supply

4.2 BMS hs pump

4.3 BMS hp pump

4.4 BMST system

4.5 BMSX system

4.6 Low-pressure flow control

5. Handling and storing the product

6. Product introduction

6.1 Nameplate

6.2 Pumped liquids

6.3 Filtration

6.4 Flushing and salinity

7. Servicing the product

7.1 Motor bearings

7.2 Preventive maintenance

8. Starting up the product after standstill

8.1 Frequency of starts and stops

9. Taking the product out of operation

9.1 BMS hs pump

9.2 BMS hp pump

9.3 BMST system

9.4 BMSX system

9.5 Flushing

10. Fault finding the product

10.1 BMS hs and BMST

10.2 BMS hp

10.3 Pressure exchanger of BMSX

11. Technical data

12. Disposing of the product

Read this document before installing the product.

Installation and operation must comply with local

regulations and accepted codes of good practice.

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 serious personal injury.

CAUTION

Indicates a hazardous situation which, if not avoided,

could result in minor or moderate personal injury.

SIGNAL WORD

Description of hazard

Consequence of ignoring the warning.

- Action to avoid the hazard.

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, indicates 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.

English (GB)

2. Receiving the product

2.1 Transporting the product

The pumps are supplied from the factory in proper packing in

which they must remain until installation.

2.2 Inspecting the product

1. Check that the pump has not been damaged during

transportation.

2. Check that the type designation corresponds to the order. See

the pump nameplate.

3. Compare the motor voltage and frequency details on the

motor and frequency converter nameplates with the power

supply available.

3. Installing the product

3.1 Reading guide

When installing the products, read the instructions in the table

below.

3.2 Foundation

Construct the foundation to safely support the booster system or

pump(s) under all conditions. The pump and motor must be

installed on the same level.

The foundation must be strong enough to support the weight of

both units.

3.2.1 Vibration damping

Use the vibration dampers supplied with the BMS hs pump.

3.3 Mechanical installation

3.3.1 BMS hs pump

The pump can be mounted directly on the floor or on a base

frame (accessory).

Fig. 1 BMS hs pump

Location

To ensure sufficient cooling of the motor, leave a free space of

minimum 100 mm behind the non-drive end of the motor.

Lifting and handling the motor

Use straps when lifting the motor, and lower it down slowly.

Fig. 2 Example of how to lift the motor

During delivery and storage, never preserve the

pumps with glycerine or similar liquids which are

aggressive to the pump materials.

System/

pump

Step Action Section

BMS hs

Mechanical

installation

3.3.1 BMS hs pump

Electrical

installation

3.4.1 BMS hs pump

3 Commissioning 4.2 BMS hs pump

BMS hp

Mechanical

installation

3.3.2 BMS hp pump

Electrical

installation

3.4.2 BMS hp pump

3 Commissioning 4.3 BMS hp pump

BMST

Mechanical

installation

3.3.3 BMST system

Electrical

installation

3.4.3 BMST system

3 Commissioning 4.4 BMST system

BMSX

Mechanical

installation

3.3.4 BMSX system

Electrical

installation

3.4.4 BMSX system

3 Commissioning 4.5 BMSX system

TM05 9569 4113

WARNING

Falling objects

Death or serious personal injury

- Observe local regulations concerning limits for

manual lifting or handling.

- Use straps on the motor, and do not lift in the fan

guard.

- Make sure that the crane is suitable for the job.

Use certified and approved lifting equipment. See

nameplate.

TM05 9235 3613

If you do not follow these instructions, there is a risk

of warping or crushing some of the equipment such

as the terminal box, cover or drip cover.

English (GB)

Motor installation

The motor must be leveled. If there is a gap between the

foundation and the motor, use a spirit level, a feeler gauge and

shims to level the motor. Then secure the motor by means of

suitable screws depending on the foundation.

Direction of rotation

Connect the power supply and check the direction of rotation.

See section 3.4 Electrical installation. The direction of rotation

must correspond to the direction under normal operation. See the

installation and operating instructions for the motor.

Lifting and handling the bare shaft pump

Hoist the bare shaft pump into place, and lower it down slowly.

Fig. 3 How to lift the pump

In order to make the pump fit the motor flange, fit the pump

support foot delivered with the product. Lower the pump until the

support foot reaches the floor.

Assembling the motor and the pump

If necessary, you can change the position of the inlet pipe later.

See section Position of the inlet pipe.

Fig. 4 Position of drain holes

Alignment of the motor and the pump

Align the motor and pump before you tighten the screws. To

ensure correct installation, follow this procedure.

Use vibration dampers.

WARNING

Electric shock

Death or serious personal injury

- The electrical installation must be carried out by an

authorised person in accordance with local

regulations.

TM05 9236 3613

When assembling the pump and motor, make sure

the inlet pipe points upwards ( position 12 o'clock )

and the drain holes point downwards.

TM06 0964 1314

Inlet pipe

Drain holes

Step Description Picture

Fit all four screws

for motor and pump

connection.

Do not tighten the

screws yet.

TM05 9234 3613

Adjust the gap by

means of a feeler

gauge or similar

tool. Tighten one

screw by hand.

TM05 9232 3613

Adjust the gap 180 °

opposite the screw

you just tightened.

Do not tighten the

screw. Move the

pump to adjust the

gap.

TM05 9251 3613

Move the pump, and

adjust the gap by

means of the feeler

gauge. Tighten the

screw by hand. If

the inlet pipe has to

be turned, see

section Position of

the inlet pipe.

TM05 9345 3613

When the gap has

been adjusted,

cross-tighten all

screws to 33 Nm.

TM05 9346 3613

Fasten the support

foot to the

foundation.

TM05 9345 3613

The support foot must not impose any tension on the

pump.

English (GB)

Position of the inlet pipe

To change the position of the pipe, follow this procedure.

Flushing the system

Pipe connection

Both the inlet and the outlet pipes are fitted with clamp liners for

Victaulic couplings and must be supported close to the end of the

pipe.

Fig. 5 Pipe support

When fitting the Victaulic couplings, allow a gap of 3.5 mm

between the two pipes.

Fig. 6 Gap between pipes

Step Description Picture

Loosen M10 and

M12 screws.

TM05 9347 3613

Mark up the pump

sleeve and union

nut.

TM05 9573 4013

Turn the inlet pipe

to the required

position, and make

sure the union nut

follows.

TM05 9343 3613

4 Check the marking.

TM05 9342 3613

Fit all screws

again. Tighten all

screws to 33 Nm.

TM05 9343 3613

Fasten the support

foot to the

foundation.

TM05 9345 3613

Check the position

of the drain holes.

TM06 5336 4715

Drain holes

To avoid impurities in the pump, flush the pipes

before you connect the pump inlet and outlet pipes.

TM05 9230 3613

WARNING

Pressurised system

Death or serious personal injury

- Avoid stress in the pipe system.

TM05 9344 3613

3.5mm 3.5mm

3.5mm

Service connector

English (GB)

Service connector installation

In order to facilitate service of the pump and motor, install the

delivered service connector in the system.

1. Fit the two rubber parts.

2. Install the service connector.

Fig. 7 Position of rubber parts

3. Move the two rubber parts over the service connector.

Fig. 8 Position of service connector and rubber parts

4. Fit the Victaulic couplings and tighten the bolts to 33 Nm.

Fig. 9 Victaulic couplings

In case of a BMS hs pump, you are now ready for electrical

installation. See section 3.4.1 BMS hs pump.

In case of a BMST system, see section Lifting and handling the

BMT pump.

In case of a BMSX system, see section BMS hp pump

installation.

3.3.2 BMS hp pump

Fig. 10 BMS hp pump

Motor and pump installation

The pump and motor must be installed on the same level. If there

is a gap between the foundation and the motor or the pump, use a

spirit level, a feeler gauge and shims to level the motor. Then

secure the motor and the pump by means of suitable screws (4 x

M10) depending on the foundation.

Lifting and handling the pump

Hoist the pump into place.

Fig. 11 Example of how to lift the pump

TM05 9339 3613TM05 9340 3613TM05 9341 3613

TM06 1045 1414

We recommend that you use vibration dampers.

WARNING

Falling objects

Death or serious personal injury

- Observe local regulations concerning limits for

manual lifting or handling.

- Use straps for lifting the pump, and do not lift in the

fan guard.

- Use certified and approved lifting equipment. See

nameplate.

TM07 3141 4718

English (GB)

Position of the inlet pipe

To change the position of the pipe, follow this procedure.

Flushing the system

Pipe connection

Both the inlet and the outlet pipe are fitted with clamp liners for

Victaulic couplings and must be supported close to the end of the

pipe.

Fig. 12 Pipe support

When fitting the Victaulic couplings, allow a gap of 3.5 mm

between the two pipes.

Fig. 13 Gap between pipes

3.3.3 BMST system

A BMST system consists of a BMS hs as primary pump and a

BMT as secondary pump. The BMT pump is driven by the high-

pressure concentrate from the membrane and used as feed pump

for the primary BMS hs pump.

Fig. 14 BMST system

Fig. 15 BMT pump

BMS hs pump installation

See section 3.3.1 BMS hs pump.

Lifting and handling the BMT pump

1. Hoist the pump into place, and lower it down slowly.

2. Install and secure the pump.

3. Support the pump close to the turbine, using the bracket

behind the turbine housing.

4. Use a clamp or similar device at the other end. See the

example in fig. 14.

BMT pump installation

The BMT pump must be level. If there is a gap between the

foundation or frame and the BMT pump, use a spirit level, a feeler

gauge and shims to level the pump. Then secure the pump by

means of suitable screws depending on the foundation or frame.

Flushing the system

Pipe connection

See section Pipe connection of the BMS hs pump.

Step Description Picture

Loosen all eight

bolts in the flange.

TM06 0962 1314

Turn the inlet pipe

to the required

position. Tighten all

screws to 33 Nm.

TM06 0963 1314

Check the position

of the drain holes,

they must point

downwards

TM06 5336 4715

To avoid impurities, flush the pipes before you

connect the pump inlet and outlet pipes.

TM06 0959 1214

WARNING

Pressurised system

Death or serious personal injury

- Avoid stress in the pipe system.

TM06 0960 1214

Drain holes

3.5mm

TM05 9334 3613TM05 9350 3613

Use vibration dampers.

To avoid impurities, flush the pipes before you

connect the pump inlet and outlet pipes.

English (GB)

BMT and BMS hs pump installation

The inlet and outlet pipes are fitted with clamp liners for Victaulic

couplings.

To ensure correct installation, follow this procedure.

The concentrate from the turbine must flow freely to a drain under

all operating conditions. The height above the water level in the

drain must be at least 300 mm. The tube from the turbine to the

drain must have the same diameter in its entire length. The drain

must be larger than the tube and open so that the concentrate, a

mixture of air and water (foam), can escape freely.

Fig. 16 Drain from Pelton turbine

3.3.4 BMSX system

A BMSX system consists of a BMS hs pump as high-pressure

pump and a BMS hp pump as booster pump. The pressure

exchanger of BMSX is installed in order to recover energy from

the high-pressure concentrate.

Fig. 17 BMSX system

BMS hs pump installation

See section 3.3.1 BMS hs pump.

BMS hp pump installation

See section 3.3.2 BMS hp pump.

Step Description Picture

The turbine is

driven by the high-

pressure

concentrate from

the membrane.

Connect the high-

pressure outlet to

the turbine inlet of

the BMT pump.

TM05 9334 3613

Connect the BMT

pump inlet.

TM05 9375 3613

Connect the BMT

pump and the BMS

hs pump.

TM05 9336 3613

Connect the hose

(∅300) to the outlet

of the turbine

housing with a

strap.

Lead the hose to a

drain tank, drain

channel or a similar

drain.

Fit the end of the

hose above the

highest possible

water level in the

drain. The hose

must be supported.

TM05 9337 3613

TM05 9474 5107

The concentrate outlet must be free under all

operating conditions. If an outlet pipe is connected to

the concentrate outlet, this pipe must have an air

outlet.

TM05 9569 4113 - TM07 2946 4518

TM05 9571 4113 - TM06 1045 1414

Min. 300 mm

Min. 30°

English (GB)

Lifting and handling the pressure exchanger of BMSX

Fig. 18 Pressure exchanger of BMSX

Use suitable straps when lifting the unit. Carefully hoist the

pressure exchanger into place, and lower it down. Secure the

unit(s) to a frame, and ensure a stress-free installation.

Flushing the system

Pipe connection of the pressure exchanger

Low-pressure and high-pressure inlet and outlet pipes are fitted

with clamp liners for Victaulic couplings. See the pipe location on

the unit.

Both the inlet and the outlet pipes must be supported close to the

end of the pipes.

Fig. 19 Horizontal and vertical support of pipes

When fitting the Victaulic couplings, allow a gap of 3.5 mm

between the two pipes. See fig. 13.

3.4 Electrical installation

The electrical connection must be carried out by an authorised

electrician in accordance with local regulations and the wiring

diagrams for the motor protection, starter and monitoring devices

used. Make the electrical connections in the terminal box.

Wiring must be done according to the wiring diagram supplied

with the Grundfos product.

3.4.1 BMS hs pump

Mains and signal cables

See the quick guide or installation and operating instructions for

the drive or the motor.

In case of a BMS hs pump, you are now ready for commissioning.

See section 4.2 BMS hs pump.

Gr-1015354

WARNING

Falling objects

Death or serious personal injury

- Observe local regulations concerning limits for

manual lifting or handling.

- Make sure that the crane is suitable for the job.

Use certified and approved lifting equipment. See

nameplate.

To avoid internal damage, do not lift the pressure

exchanger by the ports or put undue strain on the

port fittings.

Thoroughly flush associated pipes with water filtered

to 5 microns before installing the PX unit. Foreign

material may cause damage.

TM05 9348 3613

WARNING

Pressurised system

Death or serious personal injury

- Avoid stress in the pipe system.

The PX unit must not be supported by its pipe fittings

nor must the PX unit be allowed to support pipes or

manifolds.

DANGER

Electric shock

Death or serious personal injury

- Connect the pump to an external mains switch

placed close to the pump and to a motor-protective

circuit breaker or a frequency converter.

- It must be possible to lock the mains switch in OFF

position (isolated). Type and requirements as

specified in EN 60204-1, 5.3.2.

- The pump must be earthed.

DANGER

Electric shock

Death or serious personal injury

- Before starting any work on the product, make

sure that the power supply has been switched off

and that it cannot be accidentally switched on.

English (GB)

PM motor

For the PM motor, see the cable sizing table below. This table is

given for reference only, and it must under no circumstances be

used instead of the current local standards.

:Nominal power.

: Nominal current.

M:Maximum continuous line current permitted in motor mode

(power drawn by the motor).

(1)

The value of the rated current and the motor cable cross-

sections are given for reference only. As a reminder, the motor

rated current permitted varies according to the switching

frequency and the temperature.

(2)

For 110 kW and higher power, there are two wires on each

phase, so six wires are used in total.

(3)

170M: Bussmann fuses.

(4)

The power cable cross-sections are given for reference only

for a current corresponding to the value of the Ico current at 3

kHz, a maximum length of 50 m, output frequency less than

100 Hz and an ambient temperature of 40 °C. We recommend

screened multi-core power cables. See fig. 20. The values

supplied are typical values.

Fig. 20 Screened multi-core cable

(5)

The PE conductor cross-section must be not less than half of

the associated phase conductor cross-section assuming that

the same material is used.

AC motor

For BMS systems supplied with AC motor, see recommendations

from VFD manufacturer.

Software

The Grundfos BMS hs pump is supplied with the required

software configuration file, if the VFD is supplied by Grundfos.

You can find the number of the software configuration file on the

small sticker placed below the control panel in the control cabinet

for the frequency converter.

See also the configuration reference guide supplied with the

product.

3.4.2 BMS hp pump

See the quick guide or installation and operating instructions

supplied with the product.

See the nameplate to identify the motor type and type of control

board.

Default settings for BMS hp motor:

• minimum speed: 1700 rpm

• maximum speed: 3600 rpm

• setpoint input: 4-20 mA

• relay: alarm.

3.4.3 BMST system

For electrical installation, see section 3.4.1 BMS hs pump.

3.4.4 BMSX system

For electrical installation, see sections 3.4.1 BMS hs pump and

3.4.2 BMS hp pump.

Product

number

Power drive model

Mains supply Motor

(1)

[kW]

[A]

Recommended

fuse

(3)

Cable cross

section

[mm

]

(2)(5)

[kW]

[A]

Cable cross

section

[mm

]

(2)(4)(5)

380-440 V 440-480 V

96943883 FC-202P45K IP55 380-480 V 45 90 80 gG-100 3 x 50 + PE 44 84.5 3 x 50 + PE

96943884 FC-202P55K IP55 380-480 V 55 106 105 gG-160 3 x 50 + PE 52 97.5 3 x 50 + PE

96943885 FC-202P75K IP55 380-480 V 75 146 130 aR-200 3 x 150 + PE 70 127.0 3 x 150 + PE

96943886 FC-202P90K IP55 380-480 V 90 177 160 aR-250 3 x 150 + PE 85 156.0 3 x 150 + PE

99292227 FC202P110K IP54 380-480 V 110 204 183 170M2620 6 x 95 + PE 100 183.0 6 x 95 + PE

99292229 FC202P160K IP54 380-480 V 160 304 291 170M4015 6 x 95 + PE 140 264.0 6 x 95 + PE

99292229 FC202P160K IP54 380-480 V 160 304 291 170M4015 6 x 95 + PE 160 316.0 6 x 95 + PE

99292230 FC202P200K IP54 380-480 V 200 381 348 170M4016 6 x 185+ PE 180 363.0 6 x 185 + PE

TM06 5337 4715

Do not change any settings without guidance from

Grundfos Service.

If not controlled by a 4-20 mA signal, the external

setpoint input must be disabled by the remote

control.

English (GB)

4. Commissioning the product

These commissioning guidelines concern both fresh-water

installations and systems for desalination.

– BMS hs pump.

– BMS hp pump.

– BMST system. See section 4.4 BMST system.

– BMSX system. See section 4.5 BMSX system.

Commissioning of BMSX booster systems must be performed by

Grundfos technicians or by audited partners acting as the service

suppliers for Grundfos.

Furthermore, we recommend that commissioning of BMS hs,

BMS hp and BMST systems is performed by Grundfos

technicians or audited partners.

Commissioning includes report and on-site training of the people

who will be responsible for maintaining and monitoring the

system.

4.1 Checking the power supply

In case a further motor check is required, proceed as follows:

• BMS hs with PM or AC motor: Disconnect the frequency

converter and lock the shaft of the PM motor. Even

unpowered, a motor with permanent magnets will generate

voltage if rotated.

• BMS hp with MG or MGE motor: Follow the instructions in the

installation and operating instructions for the MG or MGE

motor.

Warning

The sound pressure level is so high that hearing

protection must be used.

WARNING

Pressurised system

Death or serious personal injury

- Be aware of pressurised pipe systems even after

shut down.

1. Supply

voltage

TM00 1371 3597

Measure the voltage between the

phases with a voltmeter.

Connect the voltmeter to the terminals

of the frequency converter.

When the motor is loaded, the voltage must be within ± 5 % of the rated

voltage. If the voltage varies more than that, the motor may burn.

If the voltage is constantly too high or too low, replace the motor with a

motor that corresponds to the supply voltage.

Large variations in the supply voltage indicate poor power supply, and

you must stop the pump until the defect has been found.

It may be necessary to reset the frequency converter.

2. Current

consumption

TM00 1372 3597

Measure the current of each phase

while the pump is operating at a

constant outlet pressure (if possible at

the performance where the motor is

most heavily loaded).

For information on the normal

operating current, see the "Technical

specifications".

The difference between the current of the phase with the highest current

consumption and the one with the lowest current consumption must not

exceed 10 % of the lowest current consumption.

If it does, or if the current exceeds the full-load current, check these

possible faults:

• A damaged pump is causing the motor to be overloaded. Pull the pump

out of the sleeve for overhaul.

• The motor windings are short-circuited or partly disjointed.

• Too high or too low supply voltage.

• Poor connection in leads. Weak cables.

English (GB)

4.2 BMS hs pump

4.2.1 Before startup

Follow these instructions to ensure correct startup of the BMS hs

pump.

Check that the power supply is according to the nameplate.

Fig. 21 Example of BMS hs pump

* A fresh-water flush pump must be installed in systems for

seawater desalination or similar systems.

4.2.2 Startup

If an outlet valve is installed, we recommend that you open the

valve 1/4 of a turn when starting the pump or system.

To start up a BMS hs pump, proceed as follows:

1. Start the feed pump (1), and check that the inlet pressure (2)

of the BMS hs pump (6) is higher than 1.0 bar and lower than

35.0 bar.

2. Vent the BMS hs pump (6).

3. Start the BMS hs pump (6). Ramp up the BMS hs pump (6)

according to factory settings. See fig. 22 (1 and 2).

Fig. 22 Ramping up

Default ramp-up time:

• 0 to 1700 rpm in maximum three seconds (1). This setting

must not be changed.

• Ramp up from 1700 rpm is set to 1500 rpm/min (1000 rpm/40

seconds) (2). It can be changed according to application

requirement.

4. Set the outlet pressure of the pump (8) to the desired value.

See fig. 21.

5. Check that the inlet pressure (2) of the pump is higher than

1.0 bar and lower than 35.0 bar.

WARNING

Description of hazard

Death or serious personal injury

- Make sure that the pump and the system are fully

vented before startup.

For type, amount and interval of greasing, see the

nameplate on the motor.

TM06 1077 1514

Pos. Description

1 Raw-water feed pump

2 Pressure gauge (raw water)

3Filter

4 Low-pressure switch

5 Flowmeter

6 BMS hs pump with built-in non-return valve

7 High-pressure switch

8 Pressure gauge (BMS hs outlet pressure)

9 Vent

10 Pressure-relief valve

11 Pressure gauge (fresh-water pump)

12 Fresh-water flush pump*

Built-in non-return valve

Do not operate pumps against a closed valve.

Ramp up from 0 to 1700 rpm within three seconds.

TM05 8860 2813

Make sure that the BMS hs pump is dry-run

protected.

Do not touch electrical connections if the pump has

reverse flow.

rpm

3 seconds

t [seconds]

1700

English (GB)

4.3 BMS hp pump

4.3.1 Before startup

Follow these instructions to ensure correct startup of the BMS hp

pump.

Check that the power supply is according to the nameplate.

Fig. 23 Example of BMS hp pump

* A fresh-water flush pump must be installed in systems for

seawater desalination or similar systems.

The motor sizes and maximum inlet pressure during startup can

be found below.

4.3.2 Startup

If an outlet valve is installed, we recommend that you open the

valve 1/4 of a turn when starting the pump/system.

To start up a BMS hp pump, proceed as follows:

1. Start the feed pump (1), and check that the inlet pressure (2)

of the BMS hp pump (6) is higher than 0.5 bar (6" BMS hp) or

1.0 bar (8" BMS hp).

2. Vent the BMS hp pump.

3. Start the BMS hp pump.

4. Ramp up the BMS hp pump according to factory settings. See

fig. 24 (1).

Fig. 24 Ramping up, BMS hp

Default ramp-up time:

• 0 to 1700 rpm in maximum three seconds. This setting must

not be changed.

• Ramp up from 1700 rpm to maximum speed of the system. It

can be changed according to application requirement.

5. Set the outlet pressure of the BMS hp pump to the desired

value. See fig. 23.

6. Check that the inlet pressure of the pump is higher than 0.5

bar (6" BMS hp) or 1.0 bar (8" BMS hp) and lower than 82.7

bar.

WARNING

Description of hazard

Death or serious personal injury

- Make sure that the pump and the system are fully

vented before startup.

For type, amount and interval of greasing, see the

nameplate on the motor.

TM06 1078 1514

Pos. Description

1 Raw-water feed pump

2 Pressure gauge (raw water)

3Filter

4 Low-pressure switch

5 Flowmeter

6BMS hp pump

7 High-pressure switch

8 Pressure gauge (BMS hp outlet pressure)

9 Vent

10 Pressure-relief valve

11 Pressure gauge (fresh-water pump)

12 Fresh-water flush pump*

BMS hp pumps with the motor sizes mentioned

below must have lower inlet pressure during startup.

Maximum inlet pressure during startup

[bar]

MG motors size

3.0 kW 60

MGE motors size

3.0 kW 15

5.5 kW 30

7.5 kW 40

11.0 kW 55

Do not operate pumps against a closed valve.

Ramp up from 0 to 1700 rpm within three seconds.

TM06 1079 1614

Make sure that the BMS hp pump is dry-run

protected.

rpm

3 seconds

t [seconds]

1700

English (GB)

4.4 BMST system

4.4.1 Before startup

Follow these instructions to ensure correct startup of the BMST

system.

1. Check that the power supply is according to the nameplate.

2. Check that the installation corresponds to the diagram.

Fig. 25 Example of BMST booster system

4.4.2 Startup

To start up a BMST system, proceed as follows:

1. Start the raw-water feed pump (1), and check that the inlet

pressure (2) of the pump is higher than 2.0 bar (20 metres

head) and lower than 5.0 bar (50 metres head).

2. Vent the BMT pump (6).

The pump is fully vented when liquid runs out of the vent (9).

3. Start the BMS hs pump (6.1). See section 4.2.2 Startup.

4. Set the outlet pressure (7) of the pump to the desired value.

5. Check that the inlet pressure (2) of the pump is higher than

2.0 bar (20 metres head) and lower than 5.0 bar (50 metres

head).

6. The system is now ready for operation.

4.5 BMSX system

4.5.1 Flow control and balancing

Flow rates and pressures in a typical BMSX system vary slightly

over the life of the system due to temperature variations,

membrane fouling and feed salinity variations. The rotor of the

pressure exchanger is powered by the flow of fluid through the

unit. The speed of the rotor is self-adjusting over the operating

range of the pressure exchanger pump.

4.5.2 Before startup

Follow these instructions to ensure correct startup of the BMSX

system.

1. See section 4.2 BMS hs pump and 4.3 BMS hp pump.

2. Check that the installation corresponds to the diagram.

WARNING

Description of hazard

Death or serious personal injury

- Make sure that the pump and the system are fully

vented before startup.

For type, amount and interval of greasing, see the

nameplate on the motor.

TM05 8861 2813

Pos. Description

1 Raw-water feed pump

2 Pressure gauge (raw water)

3Filter

4 Low-pressure switch

5 Flowmeter

6 BMT pump

6.1 BMS hs pump

7 Pressure gauge (BMST outlet pressure)

8 Flowmeter

9Vent

10 High-pressure switch

11 Pressure-relief valve

12 Membrane filter

13 Permeate

14 Pressure gauge (high-pressure concentrate)

15 Pressure gauge (fresh-water pump)

16 Fresh-water flush pump

6.1

109

Make sure that the BMS hs pump is dry-run

protected.

Ramp up from 0 to 1700 rpm within three seconds.

WARNING

Description of hazard

Death or serious personal injury

- Make sure that the pump and the system are fully

vented before startup.

A pressure gauge should be installed near each pipe

connection of the PX unit or PX unit array to facilitate

monitoring of PX unit performance.

English (GB)

Fig. 26 Example of BMSX booster system

4.5.3 Startup

To start up a BMSX system, proceed as follows:

1. All valves must be in their normal operating positions.

2. Start the raw-water feed pump (1). When the raw-water feed

pump is started, the system is filled with water. Make sure that

the entire system is vented. The feed flow (17) through the

pressure exchanger (23) may or may not cause the rotor to

begin to rotate. Rotation will be confirmed by a humming

noise.

3. Adjust the flow rate and pressure within the maximum and

minimum values stated on the PX nameplate.

Fig. 27 Starting the seawater feed pump

4. Adjust the concentrate valve (24) to the system flow.

5. Vent the system.

6. When you have filled the system with water and vented it, see

the BMS hp startup procedure.

7. Starting the BMS hp pump (14). See section 4.3.2 Startup.

TM05 9617 4213

Pos. Description

1 Raw-water feed pump

2 Filter

3 Low-pressure switch

4Flowmeter

5 Pressure gauge (raw water)

6 BMS hs pump with built-in non-return valve

7 Non-return valve

8 Pressure gauge (BMS hs outlet pressure)

9Vent

10 High-pressure switch

11 Pressure-relief valve

12 Pressure gauge (BMS hp inlet pressure)

13 Pressure gauge (BMS hp outlet pressure)

14 BMS hp pump

15 Flowmeter (high-pressure raw water)

16 Pressure gauge (low-pressure raw water)

17 Flowmeter (low-pressure raw water)

18 Membrane filter

19 Permeate

20 Cleaning flush valve

21 Pressure gauge (high-pressure concentrate)

22 Pressure gauge (low-pressure concentrate)

23 Pressure exchanger of BMSX

24 Concentrate valve

25 Pressure gauge (fresh-water pump)

26 Fresh-water flush pump

27 Flowmeter

Built-in non-return valve

Never operate the main high-pressure pump without

the BMS hp pump. An interlock should be installed,

so the high-pressure pump will automatically shut

down if the booster pump shuts down.

TM05 9619 4213

The maximum flow rate of the pressure exchanger

must never be exceeded. See the nameplate of the

pressure exchanger.

WARNING

Pressurised system

Death or serious personal injury

- The BMS hp pump must not run against a closed

outlet valve for more than 5 seconds.

- Ensure a minimum liquid flow through the pump by

connecting a bypass or drain to the outlet side of

the pump. The drain can be connected to a tank.

Built-in non-return valve

English (GB)

Fig. 28 System pressure and flow, BMS hp

The rotor speed will increase, and remaining air will be released

from the pressure exchanger. Vent any remaining air from the

system.

Adjust the frequency converter of the BMS hp pump (14) on the

outlet side of the pressure exchanger (23) until the low-pressure

seawater inlet flow (17) equals the calculated seawater flow (15).

Fig. 29 Balanced flows

To achieve a balanced flow through the pressure exchanger (23),

use the flowmeters installed on the low-pressure seawater inlet

pipe (17) and the high-pressure seawater pipe (15). All flows in

and out of the pressure exchanger (23) must be balanced to

within 5 % for optimum operation.

A lower flow in the seawater inlet than the seawater outlet will

result in lower-quality permeate, increased feed pressure and

higher energy consumption. We recommend that you use a

slightly oversized BMS hp pump (14) to handle projected

membrane concentrate flows, taking seasonal variations,

membrane fouling and manifold losses into account. The flow and

pressure of the BMS hp pump (14) must be controlled with a

frequency converter.

To start up a BMS hs pump (6), proceed as follows:

See section 4.2.2 Startup.

Fig. 30 System in operation

The BMSX system pressure will increase. The sound pressure

level from the pressure exchanger (23) will increase. Small

variations in sound pressure level and rotor speed are normal.

4.6 Low-pressure flow control

The concentrate valve (24) on the outlet side of the system must

be adjusted to control the flow rate of the low-pressure seawater

inlet (17) and low-pressure concentrate outlet (22) (minimum 1

bar backpressure). This valve (24) also adds backpressure on the

pressure exchanger (23) required to prevent destructive

cavitation. The low-pressure seawater inlet flow (17) equals the

high-pressure concentrate inlet flow (15).

TM05 9620 4213TM05 9620 4213

Built-in non-return valve

Operating the pressure exchanger with unbalanced

flows may result in contamination of the seawater

feed by the concentrate and consequently lower

efficiency.

Neither the low-pressure nor the high-pressure flow

through the pressure exchanger must ever exceed

the rated maximum flow. The only reliable way to

determine the flows is to use a low-pressure

flowmeter (16) or a high-pressure flowmeter (14),

respectively.

TM05 9618 4213

175

Built-in non-return valve

English (GB)

5. Handling and storing the product

If the pumps have to be stored, the location must be frost-free.

6. Product introduction

Grundfos BMS, BMST and BMSX booster systems are designed

for high pressure boosting, filtraton and desalination of seawater

or brackish water in the so-called SWRO systems (SWRO = Sea

Water Reverse Osmosis). The design of the systems ensures

high energy recovery.

6.1 Nameplate

Fig. 1 Nameplate

6.2 Pumped liquids

Thin, non-explosive liquids, not containing solid particles or

fibres. The liquid must not chemically attack the pump materials.

In case of doubt, contact Grundfos.

The pumps must never operate with water or liquid containing

substances which would remove the surface tension, e.g. soap. If

you use this type of detergent to clean the system, the water or

liquid must be led around the pumps via a bypass.

6.3 Filtration

BMS hs, BMS hp, BMST: Filter the raw water to maximum 30

microns.

BMSX: Filter the raw water to maximum 10 microns.

Fig. 2 Filtration

6.4 Flushing and salinity

When the booster system is stopped, it is very important to flush

the system according to these guidelines.

See also periods of inactivity in section 8. Starting up the product

after standstill.

* TDS: Total dissolved solids

TM05 9242 3613

Pos. Description

1 Type designation

Model designation:

• generation

• product number

• production code (dd-mm-yy).

3 Rated flow rate

4 Rated head

5 Rated speed

6 Minimum and maximum inlet pressure

7 Maximum outlet pressure

8 Minimum and maximum liquid temperature

9 Net weight of booster module

10 Minimum efficiency index

11 Country of origin

12 CE mark

13 WEEE marking

Do not use the pumps for pumping flammable or

combustible liquids such as diesel oil, petrol or

similar liquids.

N/A

11 12 13

TM05 8862 2813

Pos. Description

1 Raw-water feed pump

2 Pressure gauge (raw water)

3 Low-pressure switch

4Flowmeter

5 Pressure gauge (fresh-water pump)

6 Fresh-water flush pump

Pump type

Filter

[micron absolute]

BMS hs

30BMS hp

BMST

Pressure exchanger of BMSX 10

Flush the pumps to prevent stagnant seawater which

can start corrosion inside the pump.

Pump type

Fresh water

min

[bar]

Max. salinity

[ppm TDS*]

Flushing time

[min.]

BMS hs

2 1000

Depends on

pressure, flow,

water quality and

system design

and size.

BMS hp

BMST

Pressure

exchanger

of BMSX

Filter

English (GB)

7. Servicing the product

Check the following at suitable intervals, preferably daily:

• flow rate and pressure

• whether the noise level has changed.

We recommend that you write the operating data in a log book as

they may be useful in connection with maintenance.

7.1 Motor bearings

The pumps are factory-fitted with a manual motor-bearing

greasing system. See the motor nameplate or the installation and

operating instructions supplied with the motor for information

such as greasing intervals..

7.1.1 Type of grease

See motor nameplate.

7.2 Preventive maintenance

The preventive maintenance tasks recommended in this section

are common for all systems and for average operating conditions.

In case the operating conditions are unfavourable, the

maintenance tasks must be performed more frequently, and they

can vary from installation to installation, for instance due to

unexpected changes of the raw water quality.

To see any variation in the pump performance and be able to

react to this, we recommend that you keep a log book of the daily

operation.

* Use one gasket kit every time a pressure exchanger is opened for inspection.

For further information on maintenance and service, refer to the

separate documents supplied for each component and/or

Grundfos Product Center.

DANGER

Magnetic field

Death or serious personal injury

- Dismantling of the PM motors used for the BMS

HS-E-C-P-A pumps must not be carried out by

people with pacemakers or any other implanted

medical devices. The rotor contains a very

powerful magnetic field, which can affect

pacemakers or disturb digital devices.

Temperature variations can cause condensation

inside the motor. We recommend that you remove

the motor drain plug to let condensation water

escape.

During prolonged storage or downtime, the interval

between two greasing operations must never exceed

6 months.

Avoid mixing greases.

Check for leaks,

noise or abnormal

vibrations

Check thrust

bearing and shaft

seal

Lubricate motor

bearings

Replace motor

bearings

Clean filter mats on

control panel

BMS hs (with PM motor)

Weekly

No preventive

maintenance

required

According to motor nameplate MonthlyBMS hs (with AC motor)

BMS hp

Pressure exchanger of

BMSX

No preventive maintenance required*

English (GB)

8. Starting up the product after standstill

Follow the normal startup procedure step by step. For greasing of

motor bearings, see section 7.1 Motor bearings.

8.1 Frequency of starts and stops

We recommend the following frequency:

minimum 1 per year

maximum 5 per hour

maximum 20 per day.

9. Taking the product out of operation

Before periods of inactivity, take various precautions to protect

the system.

The specific precautions to be taken appear from the table:

* Use the same solution that is used to preserve the

membranes.

Carefully follow these instructions to safely shut down your

booster system.

9.1 BMS hs pump

This procedure describes how to shut down the BMS hs pump.

Fig. 3 Example of BMS hs pump

Procedure

1. Ramp down the BMS hs pump (6) according to the factory

settings. See fig. 4 (3 and 4).

Fig. 4 Ramp down

2. Stop the feed pump (1).

3. Start the fresh-water flush pump (12), and flush the system

with fresh water (11) (minimum 2 bar for flushing).

4. Flush the system until the salinity is lower than 1000 ppm

TDS.

5. Stop the fresh-water pump (12).

6. Close all valves to keep the fresh water in the system during

the shutdown.

* Only flush desalination systems that pump seawater or similar

aggressive liquids.

Action

Period of inactivity

More than

6 hours

More than

1 month

Flush the pump. See section

6.4 Flushing and salinity.

Fill the pump with fresh water. x x

Preserve the pump.* x

Flush the pumps to prevent stagnant seawater which

can start corrosion inside the pump.

TM06 1077 1514

1000 ppm TDS

Built-in non-return valve

TM05 8860 2813

Ramp down from 1700 to 0 rpm in three seconds.

To flush the thrust bearing of the BMS hs pump, start

the pump for 30 seconds to allow the fresh water to

enter into the thrust bearing.

If the flushing takes more than 10 minutes, reduce

the flow to maximum 10 % of the rated flow rate.

During periods of inactivity, fill the pump with clean

fresh water.

rpm

3 seconds

t [seconds]

1700

English (GB)

9.2 BMS hp pump

This procedure describes how to shut down the BMS hp pump.

Fig. 5 Example of BMS hp system

Procedure

1. Ramp down the BMS hp pump (6) according to the factory

settings. See fig. 6 (3 and 4).

Fig. 6 Ramp down

2. Stop the feed pump (1).

3. Start the fresh-water flush pump (12), and flush the system

with fresh water (11) (minimum 2 bar for flushing).

4. Flush the system until the salinity is lower than 1000 ppm

TDS.

5. Stop the fresh-water pump (15).

6. Close all valves to keep the fresh water in the system during

the shutdown.

9.3 BMST system

This procedure describes how to shut down the BMST system.

Fig. 7 Example of BMST system

Procedure

1. Ramp down the BMS hs pump (6.1) according to the factory

settings.

2. Stop the seawater feed pump (1).

3. Start the fresh-water flush pump (16), and flush the system

with fresh water (15) (minimum 2 bar for flushing).

4. Flush the system for 5 to 10 minutes or until the salinity is

lower than 1000 ppm TDS.

5. Stop the fresh-water pump (16).

6. Close all valves to keep the fresh water in the system during

shutdown.

TM06 1078 1514TM06 1079 1614

Ramp down from 1700 to 0 rpm in three seconds.

To flush the thrust bearing of the BMS hp pump, start

the pump for 30 seconds to allow the fresh water to

enter into the thrust bearing.

If the flushing takes more than 10 minutes, reduce

the flow to maximum 10 % of the rated flow rate.

During periods of inactivity, fill the pump with clean

fresh water.

rpm

3 seconds

t [seconds]

1700

TM05 8861 2813

To flush the thrust bearing of the BMS hs pump, start

the pump for 30 seconds to allow the fresh water to

enter into the thrust bearing.

If the flushing takes more than 10 minutes, reduce

the flow to maximum 10 % of the rated flow rate.

During periods of inactivity, fill the pump with clean

fresh water.

6.1

109

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Grundfos BMST Assembly, Installation And Operating Instructions

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