Elmo Rletschle L-BV7 User Manual

Edition: 04.2010 · 610.48060.40.000 Original operating instructions · English

Operating Instructions L-BV7



2BV7 060 2BV7 061 2BV7 070 2BV7 071

L-Serie

L-Series

Flüssigkeitsring

Liquid Ring

Replication, distribution and / or editing of this document and the use and distribution of its content is prohibited unless explicitly permitted. Violation obligates compensation for damages. All rights reserved in case of the issue of a patent, utility patent or design patent.

Contents

Glossary ..............................................................................................................................................6

2 Safety ..................................................................................................................................................7

2.1 Definitions .................................................................................................................................7

2.1.1 Safety alert symbol.......................................................................................................7

2.1.2 Signal words.................................................................................................................7

2.1.3 Graphic symbols...........................................................................................................8

2.2 General safety precautions .......................................................................................................9

2.3 Residual risks..........................................................................................................................11

3 Intended Use .....................................................................................................................................12

4 Technical Data ..................................................................................................................................13

4.1 Mechanical data......................................................................................................................13

4.2 Electrical data..........................................................................................................................16

4.3 Operating conditions ...............................................................................................................16

5 Description of Vacuum Pump/Compressor .......................................................................................18

5.1 Design .....................................................................................................................................18

5.2 Operating method ...................................................................................................................18

5.3 Operating modes.....................................................................................................................19

5.3.1 Self-priming operation ................................................................................................19

5.3.2 Operation with operating-liquid feed ..........................................................................19

6 Transport and Handling.....................................................................................................................20

7 Installation .........................................................................................................................................22

7.1 Installation ...............................................................................................................................22

7.2 Electrical connection (motor) ..................................................................................................24

7.3 Connecting pipes/hoses (vacuum pump/compressor)............................................................25

7.3.1 Inlet connection ..........................................................................................................26

7.3.2 Discharge connection.................................................................................................26

7.3.3 Operating-liquid port...................................................................................................26

7.3.4 Notes ..........................................................................................................................27

7.4 Accessories.............................................................................................................................27

8 Commissioning..................................................................................................................................28

8.1 Preparation and start-up .........................................................................................................28

8.2 Self-priming operation.............................................................................................................30

8.3 Operation with operating-liquid feed .......................................................................................31

9 Operation...........................................................................................................................................33

9.1 Self-priming operation.............................................................................................................33

9.2 Operation with operating-liquid feed .......................................................................................33

10 Shut-Down and Longer Standstills....................................................................................................34

10.1 Draining...................................................................................................................................34

10.2 Preparing for longer standstill .................................................................................................34

10.3 Storage conditions ..................................................................................................................35

11 Servicing............................................................................................................................................36

11.1 Maintenance............................................................................................................................36

11.2 Repairs/troubleshooting ..........................................................................................................39

11.3 Spare parts..............................................................................................................................41

11.3.1 Ordering nash_elmo spare parts................................................................................41

11.3.2 Ordering standardized parts.......................................................................................41

11.4 Service/After-sales service......................................................................................................41

11.5 Decontamination and Declaration of Clearance .....................................................................42

12 Disposal.............................................................................................................................................43

Contents

Accessories .......................................................................................................................................44

13.1 Flanges....................................................................................................................................44

13.2 Non-return valve......................................................................................................................44

13.3 Gas ejector..............................................................................................................................45

13.4 Liquid separator ......................................................................................................................46

13.5 Cavitation protection ...............................................................................................................49

14 Exploded View with Parts List ...........................................................................................................50

14.1 Parts list...................................................................................................................................50

14.2 Exploded view .........................................................................................................................51

EU declaration of conformity ..................................................................................................................54

Form for statement on safety .................................................................................................................55

Index.......................................................................................................................................................56

610.48060.40.000 4 / 64 © Gardner Denver Deutschland GmbH

List of Illustrations

Fig. 1:

Dimensions .............................................................................................................................13

Fig. 2: Minimum inlet pressure/cavitation limit ...................................................................................17

Fig. 3: Design and operation of liquid-ring vacuum pumps/compressors (cross-section of operating

chamber) .................................................................................................................................18

Fig. 4: Attachment points ...................................................................................................................21

Fig. 5: Points for measuring the vibration speed................................................................................23

Fig. 6: Securing elements for bolting feet to supporting surface........................................................23

Fig. 7: Pipe/hose connection of vacuum pump/compressor ..............................................................25

Fig. 8: Self-priming operation .............................................................................................................30

Fig. 9: Setting the operating-liquid flow rate: Setting pre-pressure....................................................31

Fig. 10: Setting the operating-liquid flow rate: Measuring the volume with a graduated vessel..........31

Fig. 11: Operation with operating-liquid feed: Non-automatic operation..............................................32

Fig. 12: Operation with operating-liquid feed: Automatic operation .....................................................32

Fig. 13: Maximum permissible quantity of water entrained via the inlet connection............................32

Fig. 14: Pour in preservative and turn shaft .........................................................................................34

Fig. 15: Removing vacuum pump/compressor housing.......................................................................38

Fig. 16: Pouring in decalcifying agent and freeing shaft by turning .....................................................38

Fig. 17: Flanges....................................................................................................................................44

Fig. 18: Non-return valve......................................................................................................................44

Fig. 19: Gas ejector ..............................................................................................................................45

Fig. 20: Mounting liquid separator, Part 1 of 2 .....................................................................................47

Fig. 21: Mounting liquid separator, Part 2 of 2 .....................................................................................48

Fig. 22: Exploded view: vacuum pump/compressor section ................................................................51

Fig. 23: Exploded view: motor section .................................................................................................52

Fig. 24: Exploded view: motor section .................................................................................................53

Glossary

1 Glossary

In these instructions the following technical terms with the specified meaning are used:

Designation: Definition:

Vacuum pump

Compressor

Machine

Pump-motor unit

Machine set

Driving side; D side

Non-driving side; N side

Inlet pressure

Machine for generating a vacuum.

Machine for generating a gauge pressure.

Here: Vacuum pump or compressor. Unit for extracting, transporting and compressing gases and/or vapors, as well as for generating vacuum and gauge pressure. Here the drive is not considered part of the machine.

Unit consisting of a machine and a drive motor.

Two or more machines that are interconnected with couplings and mounted on a common base frame.

Side of the machine on which the drive is connected.

Side of the machine on which no drive is connected.

Pressure of the pumped gases/vapors on the inlet connection of the machine.

Discharge pressure; Compression pressure

Pressure of the pumped gases/vapors at the discharge connection of the machine.

Test pressure

Pressure to which the machine is subjected when testing for leaks.

Qualified personnel Persons who, based on their training, experience and instruction, as well as their

knowledge of the pertinent standards, regulations, accident protection regulations and operating conditions, are capable of carrying out certain tasks (e.g. start-up, operation, maintenance, repair) and can recognize and avoid possible dangers in the process. The required knowledge includes a knowledge of first aid and of the on-site emergency equipment. These persons must be authorized by the person responsible for system safety to perform the required tasks.

610.48060.40.000 6 / 64 © Gardner Denver Deutschland GmbH

2 Safety

2.1 Definitions

To point out dangers and important information, the following signal words and symbols are used in these operating instructions:

2.1.1 Safety alert symbol



The safety alert symbol is located in the safety precautions in the highlighted heading field on the left next to the signal word (DANGER, WARNING, CAUTION).

Safety precautions with a safety alert symbol indicate a danger of injuries.

Be sure to follow these safety precautions to protect against

injuries or death!

2.1.2 Signal words

DANGER

WARNING

CAUTION

NOTICE

NOTE

Safety precautions without a safety alert symbol indicate a danger of damage.

The signal words are located in the safety precautions in the highlighted heading field.

They follow a certain hierarchy and indicate (in conjunction with the safety alert symbol, see Chapter 2.1.1) the seriousness of the danger and the type of warning.

See the following explanations:



DANGER

Safety



WARNING

Danger of injuries.

Indicates a potentially hazardous situation, that could result in death or serious injury if the corresponding measures are not taken.



CAUTION

Danger of injuries.

Indicates a potentially hazardous situation, that may result in minor or moderate injury if the corresponding measures are not taken.

CAUTION

Danger of damage.

Indicates a potentially hazardous situation that may result in property damage if the corresponding measures are not taken.

NOTICE

Indicates a possible disadvantage, i.e. undesirable conditions or consequences can occur if the corresponding measures are not taken.

NOTE

Danger of injuries.

Indicates an imminently hazardous situation, that will result in death or serious injury if the corresponding measures

Indicates a possible advantage if the corresponding measures are taken; tip.

are not taken.

Safety

2.1.3 Graphic symbols

The graphic symbol is located in safety precautions in the left-hand field.

There are several types of graphic symbols:

Hazard alerting symbols

Prohibition symbols

... for general dangers:

... for special dangers:

Mandatory action symbols

... for general instructions:

... for special instructions:

... for general prohibitions:

... for special prohibitions:

Information

610.48060.40.000 8 / 64 © Gardner Denver Deutschland GmbH

2.2 General safety precautions



WARNING

Safety



WARNING

Improper use of the unit can result in serious or even fatal injuries!

These operating instructions  must have been read

completely and understood before beginning any work with or at the pump-motor

When working on the unit, there is a danger of injury, e.g. in the form of cuts/cutting off, crushing and burns!

During transport/handling as well as assembly and disassembly always wear personal protective equipment (safety helmet, protective gloves, safety boots)!

unit,

 must be strictly observed,  must be available at the

operating location of the pump-motor unit.



WARNING



WARNING

Hair and clothing can be pulled

Improper use of the unit can result in serious or even fatal injuries!

Only operate the pump-motor

into the unit or caught and wound up moving parts!

Do not wear long, loose hair or wide, loose clothes!

unit  for the purposes indicated

under "Intended Use"!

 with the fluids indicated under

Use a hair net!



DANGER

'Intended Use'!

 with the values indicated

under 'Technical Data'!



WARNING

Electrical danger!

Before beginning work on the unit or system, the following measures must be carried out:

 Deenergize.

Improper use of the unit can result in serious or even fatal injuries!

Transport and handling as well as assembly and disassembly of the unit may be carried out by trained and responsible personnel only!

 Secure against being

switched on again.

 Determine whether

deenergized.

 Ground and short-circuit.  Cover or block off adjacent

energized parts.



DANGER

Electrical danger!

Work on electrical installations

may be carried out by trained and authorized electricians only!

Safety



DANGER

Electrical danger!

Do not open the motor terminal box unless absence of electricity has been ensured!



WARNING

Danger due to gauge pressure and vacuum!

Danger due to escaping fluid!

Before beginning work on the unit or system:

 Interrupt supply of operating

liquid.

 Bleed lines and vacuum

pump/compressor (depressurize).



WARNING

Danger from rotating external fan of unit!

Only operate the unit with the fan guard mounted!

It is prohibited to remove the fan guard!



WARNING

Danger from rotating impeller



WARNING

Danger due to gauge pressure and vacuum!

Danger due to escaping fluid!

Only operate the unit with the pipes/hoses connected to the intake and discharge connection, as well as to the operating-liquid port!



WARNING

Danger from rotating impeller of unit!

Only operate the unit with the pipes/hoses connected to the intake and discharge connection, as well as to the operating-liquid port!



WARNING

Danger in the form of cuts or cutting off extremities on the impeller of the pump-motor unit!

Do not reach into the unit through open connections!

Do not insert objects into the unit through the openings!



WARNING

of unit!

Only operate the unit with the vacuum pump/compressor housing mounted!

Do not remove the vacuum pump/compressor housing until after the unit has been shut down and the impeller has come to a complete stop!

Consider that the impeller has a certain run-out!

Danger due to gauge pressure and vacuum!

Check the lines and containers used for sufficient strength!



WARNING

Danger due to gauge pressure and vacuum!

Danger due to escaping fluid!

Check the connections of the pipe/hose connections for leaks!

610.48060.40.000 10 / 64 © Gardner Denver Deutschland GmbH

Safety



WARNING

Danger of burns and scalding from hot surfaces of the pumpmotor unit and from hot fluids!

Do not touch during operation! Allow to cool after shut-down!



CAUTION

2.3 Residual risks



Danger zone:

Shaft exposed in gap between drive motor and vacuum

pump/compressor.

Hazard:

WARNING

Possible entanglement of long,

Danger of unit tipping over!

Secure the pump-motor unit on the installation surface before putting into operation!

loose hair!

Protective measures:

Wear hair net!



WARNING

Danger zone:

Fan guard

Hazard:

Long, loose hair can be drawn into external fan through fan guard grate, even with fan guard mounted!

Protective measures:

Wear hair net!



WARNING

Danger zone:

Hot surface.

Hazard:

Burns/scalding possible.

Protective measures:

Do not touch! Wear protective gloves!

Intended Use

3 Intended Use

These operating instructions

 apply to liquid-ring vacuum

pumps/compressors of the L-BV7 series, types 2BV7 060, 2BV7 061, 2BV7 070 and 2BV7 071,

 contains instructions bearing on transport

and handling, installation, commissioning, operation, shut-down, storage, servicing and disposal of the L-BV7,

 must be completely read and understood by

all operating and servicing personnel before beginning to work with or on the L-BV7,

 must be strictly observed,  must be available at the site of operation of

the L-BV7.

About the operating and servicing personnel of the L-BV7:

 These persons must be trained and

authorized for the work to be carried out.

 Work on electrical installations may be

carried out by trained and authorized electricians only.

 If necessary, the training/instruction on

using the L-BV7 can be carried out by the manufacturer/suppler on order of the owner.

The L-BV7

 are pump-motor units for generating

vacuum or gauge pressure.

 are used to extract, transport and compress

the following pumped gases/vapors:

– all dry and humid gases,

which are not explosive or flammable,

– preferably air or air/vapor mixtures. – In case of corrosive or toxic

gases/vapors contact service.

 are designed for operation with the

following operating liquids:

– Water

with a pH of 6 to 9, free of solid materials (such as sand).

– If the pH values or operating liquids

differ, it is necessary to contact service.

 are intended for industrial applications.  are designed for continuous operation.

When operating the L-BV7, the limits listed in Chapter 4, "Technical Data", Pg. 13 ff. must always be complied with.

Foreseeable Misuse

It is prohibited

 to use the L-BV7 in applications other than

industrial applications unless the necessary protection is provided on the system, e.g. guards suitable for children's fingers,

 to use the device in rooms in which

explosive gases can occur if the L-BV7 is not expressly intended for this purpose;

 to extract, to deliver and to compress

explosive, flammable, corrosive or toxic fluids unless the L-BV7 is specifically designed for this purpose,

 to operate the L-BV7 with values other than

those specified in Chapter 4, "Technical Data", Pg. 13 ff.

Any unauthorized modifications of the L-BV7 are prohibited for safety reasons. any maintenance and repair work, such as replacing worn or defective components, may only be carried out by companies authorized by the manufacturer (please contact service).

610.48060.40.000 12 / 64 © Gardner Denver Deutschland GmbH

4 Technical Data

4.1 Mechanical data

Dimensions

N3.0 N2.0

Fig. 1: Dimensions

N1.0 Inlet connection N2.0 Discharge connection N3.0 Operating-liquid port N4.2 Emptying or drain opening N8.7 Connection for cavitation protection

B1 B

N1.0

Technical Data

N8.7

N4.2

Specification in mm

Type 2BV7 060 2BV7 061 2BV7 070 2BV7 071

...-1 ...-2

...-3 ...-1 ...-2 ...-3 ...-1

...-2 ...-3

A 335 372 394 438 473 482 488 511

B 162 180 180 202 204 266 227 266

B1 125 140 140 160 160 216 190 216

E 100 100 100 140 140 140 140 140

G 186 218 218 231 266 266 252 266

H1 80 90 90 100 100 132 112 132

H2 107 117 117 134 134 166 146 166

H3 156 166 166 194 194 227 206 227

H4 180 190 190 222 222 260 234 260

H6 26 36 36 34 34 66 46 66

L 184 225 225 249 284 284 263 284

Technical Data

Specification in mm

Type 2BV7 060 2BV7 061 2BV7 070 2BV7 071

...-1 ...-2

...-3 ...-1 ...-2 ...-3 ...-1

...-2 ...-3

M 72 68 68 89 89 99 96 99

P2 200 218 218 235 235 300 261 300

P3 161 180 180 201 202 265 225 265

R 59 55 55 71 71 81 78 81

S2 10 10 10 12 12 12 12 12

S4 M25 x 1.5 M32 x 1.5

S5 M16 x 1.5 M32 x 1.5

W 32 32 32 42 42 42 42 42

W1 110 110 110 120 120 120 120 120

W3 23 23 23 28 28 28 28 28

d G 1 G 1 G 1 G 1½ G 1½ G 1½ G 1½ G 1½ N3.0,

4.2, 8.7

G ¼

Specifications in inches

Type 2BV7 060 2BV7 061 2BV7 070 2BV7 071

...-1 ...-2

...-3 ...-1 ...-2 ...-3 ...-1

...-2 ...-3

A 13.2 14.6 15.5 17.2 18.6 19.0 19.2 20.1

B 6.38 7.09 7.09 7.95 8.03 10.5 8.94 10.5

B1 4.92 5.51 5.51 6.30 6.30 8.50 7.48 8.50

E 3.94 3.94 3.94 5.51 5.51 5.51 5.51 5.51

G 7.32 8.58 8.58 9.09 10.5 10.5 9.92 10.5

H1 3.15 3.54 3.54 3.94 3.94 5.20 4.41 5.20

H2 4.21 4.61 4.61 5.28 5.28 6.54 5.75 6.54

H3 6.14 6.54 6.54 7.64 7..4 8.94 8.11 8.94

H4 7.09 7.48 7.48 8.74 8.74 10.2 9.21 10.2

H6 1.02 1.42 1.42 1.34 1.34 2.60 1.81 2.60

L 7.24 8.86 8.86 9.80 11.2 11.2 10.4 11.2

M 2.83 2.68 2.68 3.50 3.50 3.90 3.78 3.90

610.48060.40.000 14 / 64 © Gardner Denver Deutschland GmbH

Technical Data

Specifications in inches

Type 2BV7 060 2BV7 061 2BV7 070 2BV7 071

...-1 ...-2

...-3 ...-1 ...-2 ...-3 ...-1

...-2 ...-3

P2 7.87 8.58 8.58 9.25 9.25 11.8 10.3 11.8

P3 6.34 7.09 7.09 7.91 7.95 10.4 8.86 10.4

R 2.32 2.17 2.17 2.80 2.80 3.19 3.07 3.19

S2 0.394 0.394 0.394 0.472 0.472 0.472 0.472 0.472

S4 M25 x 1.5 M32 x 1.5

S5 M16 x 1.5 M32 x 1.5

W 1.26 1.26 1.26 1.65 1.65 1.65 1.65 1.65

W1 4.33 4.33 4.33 4.72 4.72 4.72 4.72 4.72

W3 0.906 0.906 0.906 1.10 1.10 1.10 1.10 1.10

d G 1 G 1 G 1 G 1½ G 1½ G 1½ G 1½ G 1½ N3.0,

4.2, 8.7

G ¼

Technical Data

Weight

4.3 Operating conditions

Type Weight [kg] [lbs]

2BV7 060-1A.0. approx. 16 approx. 35.3 2BV7 060-2A.0. approx. 17 approx. 37.5 2BV7 060-3A.0. approx. 18 approx. 39.7 2BV7 061-1A.0. approx. 22 approx. 48.5 2BV7 070-1A.0. approx. 31 approx. 68.3 2BV7 070-2A.0. approx. 35 approx. 77.2 2BV7 070-3A.0. approx. 48 approx. 106 2BV7 071-1A.0. approx. 39 approx. 86 2BV7 071-2A.0. approx. 50 approx. 110 2BV7 071-3A.0. approx. 56 approx. 123

Minimum distances for heat dissipation

Temperatures

Temperature of pumped gases/vapors:

Operatingliquid temperature:

temperature:

max. +80 °C [max. +176 °F] At higher fluid temperatures,

measures must be taken on the system to prevent burns, e.g. mount separating safety device (cover).

max. +80 °C [max. +176 °F] min. +5 °C [min. +41 °F] Nominal

value: +15 °C

[+59 °F] max. +40 °C [+104 °F] Ambient min. +5 °C [+41 °F]

Type

2BV7 060 34 1.34 2BV7 061 34 1.34 2BV7 070 53 2.09 2BV7 071 53 2.09

Noise level

Measuring-surface sound pressure level as per EN ISO 3744, measured at distance of 1 m [3.28 ft] with medium throttling (100 mbar abs. [1.45 psia]) and connected lines, tolerance  3 dB (A).

Type

2BV7 060 70 2BV7 061 70 2BV7 070 72 2BV7 071

Limit speeds for supply by converter

Type n [rpm]

2BV706 4,800 2BV707 4,000

4.2 Electrical data

See drive motor rating plate.

Minimum distance from

fan guard to adjacent surface

[mm] [inches]

1-m measuring-surface sound

pressure level L [dB (A)]

at 50 Hz: at 60 Hz:

Pressures

Min. inlet pressure:

Dependent on the operating liquid temperature (see Fig. 2, Pg. 17)

When this temperature is dropped below, the hose of the liquid separator (accessory) must be connected to the connection for cavitation protection (Fig. 7, Pg. 25, Item 4).

Max.

1.1 bar abs. [16.0 psia]

discharge pressure during vacuum-pump operation:

8 bar abs. [116 psia] Max.

permissible pressure in pump-motor unit:

If higher pressures can occur in the system, then corresponding protective devices must be provided.

Max. discharge pressure p compressor operation (at inlet pressure p

2 max

during

1 bar abs. [14.5 psia]):

Type

[bar abs.] [psia]

50 Hz: 2BV7 060 2 2 29.0 29.0 2BV7 061 2 2 29.0 29.0 2BV7 070 3 2.5 43.5 36.3 2BV7 071 3.5 2.5 50.8 36.3

at 60 Hz:

2 max

at 50 Hz:

at 60 Hz:

Technical Data



300

250

200

150

[mbar abs.]

100

0 20406080

fl[°C]

4.5 4

3.5 3

2.5

[psia]

1.5 1

0.5 0

0 50 100 150 200

[°F]

Fig. 2: Minimum inlet pressure/cavitation limit

fl [°C, °F] = Temperature of operating liquid

[mbar abs., psia] = Inlet pressure abs.

The minimum permissible inlet pressure of the pump-motor unit is dependent on the temperature of the operating liquid. During operation without cavitation protection, the minimum inlet pressure must be set above the shaded area.



Nominal operating-liquid flow rate

(with dry air extraction and with water at 15°C [59 °F] as operating liquid)

Type

Flow rate

[m³/h] [ft³/h]

at 50 Hz:

at 60 Hz:

at 50 Hz:

60 Hz: 2BV7 060 0.20 0.20 7.06 7.06 2BV7 061 0.23 0.23 8.12 8.12 2BV7 070 0.28 0.34 9.89 12.0 2BV7 071 0.45 0.55 15.9 19.4

Operating-liquid filling amount for priming

Filling amount Type

[l] [gal (US)] [gal (UK)]

2BV7 060 0.40 0.106 0.088 2BV7 061 0.55 0.145 0.121 2BV7 070 0.80 0.211 0.176 2BV7 071 1.10 0.291 0.242

Description of Vacuum Pump/Compressor

5 Description of Vacuum Pump/Compressor

Fig. 3: Design and operation of liquid-ring vacuum pumps/compressors (cross-section of operating chamber)

1 Discharge connection 2 Operating-liquid port 3 Inlet connection 4 Impeller 5 Housing 6 Discharge port 7 Inlet port 8 Operating liquid

5.1 Design

The L-BV7 2BV7s are liquid-ring vacuum pumps compressors. They consist of the vacuum pump/the compressor itself and an electric motor. For the detailed design, see Fig. 3, Pg. 18.

The pumped gases/vapors are sucked via the inlet connection (3) into the pump-motor unit and pushed out via the discharge connection (1).

The impeller (4) with the blades is located in the cylindrical housing (5). The impeller is arranged eccentrically relative to the housing. In addition, the housing also contains the operating liquid (8). This liquid is fed in via the operating-liquid port (2) and output together with the pumped gases/vapors via the discharge connection (1).

5.2 Operating method

When the impeller turns, the operating liquid is put into motion and accelerated. This forms a liquid ring that also rotates. Due to centrifugal force, this ring is arranged concentrically to the housing and eccentrically to the impeller.

During a complete rotation of the impeller, the following occurs:  The impeller cells are completely filled with

operating liquid at the upper vertex.

 During the first half rotation, the liquid ring

lifts off the impeller hub. The space in the cells increases so that the pumped gases/vapors are sucked in through the inlet port (7).

 The space in the cells is largest at the lower

vertex, as these are virtually free of operating liquid.

 During the second half rotation, the liquid

ring approaches the hub again. The space in the cells decreases so that the pumped gases/vapors are compressed and pushed out through the discharge port (6).

5.3 Operating modes

The pump-motor unit can function in several different operating modes. These differ in how the pump-motor unit is supplied with operating liquid:

 Self-priming operation

 Operation with operating-liquid feed:

– Non-automatic operation – Automatic operation

5.3.1 Self-priming operation

In this operating mode the pump-motor unit automatically sucks in the operating liquid. The operating-liquid flow rate is automatically adjusted.

See Fig. 8, Pg. 30.

5.3.2 Operation with operating-liquid feed

In this operating mode the pump-motor unit DOES NOT automatically suck in the operating liquid. A certain volume flow ("nominal operatingliquid flow rate") or pre-pressure must be set for the operating liquid.

Description of Vacuum Pump/Compressor

Here the following additional distinctions are made:

Non-automatic operation

In this case the operating liquid feed is switched on and off manually with a stop valve.

See Fig. 11, Pg. 32.

Automatic operation

In this case the operating liquid feed is switched on and off by a solenoid valve. The solenoid valve is dependent on the motor operating mode:

 Motor/pump-motor unit switched on:

Valve open.

 Motor/pump-motor unit switched off:

Valve closed.

See Fig. 12, Pg. 32.

NOTICE

The following is dependent on the operating mode:

 when and how the pump-

motor unit must be filled with operating liquid the first time,

 how the pump-motor unit is

put into operation.

The specifications for this are contained in Chapter 7, "Installation", Pg. 22ff., and Chapter 8, "Commissioning", Pg. 28ff.

Transport and Handling

6 Transport and Handling



WARNING

Danger from tipping or falling loads!

Prior to transport and handling make sure that all components are securely assembled and secure or remove all components the fasteners of which have been loosened!



CAUTION

Tipping or falling can lead to crushing, broken bones etc.!

Sharp edges can cause cuts!

Wear personal safety equipment (protective helmet, protective gloves, safety shoes) during transport!

Packing:

On delivery the pump-motor unit is bolted to a pallet and covered with a cardboard box. To unpack, remove the cardboard box and unscrew the securing bolts on the feet of the pump-motor unit.

Manual handling:



WARNING

Danger from lifting heavy loads!

Manual handling of the unit is only permitted within the following limits:

 max. 30 kg [max. 66 lbs]

for men

 max. 10 kg [max. 22 lbs]

for women

 max. 5 kg [max. 11 lbs]

for pregnant women

For the weight of the pump-motor unit, see Chapter 4.1, "Mechanical data", Section "Weight", Pg. 16.

For weights above the given values use suitable lifting appliances and handling equipment!

Handling by means of lifting equipment:



WARNING

Danger from tipping or falling loads!

When transporting with lifting equipment, observe the following basic rules:

 The lifting capacity of lifting

equipment and lifting gear must be at least equal to the unit's weight.

For the weight of the pumpmotor unit, see Chapter 4.1, "Mechanical data", Section "Weight", Pg. 16.

 The pump-motor unit must be

secured so that it cannot tip or fall.

 Do not stand or walk under

suspended loads!

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Elmo Rletschle L-BV7 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual