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Vacuum Booster
WZ 0250 B, WZ 0500 B, WZ 1000 B, WZ 2000 B

0870565695/A0005_en / Original instructions / Modifications reserved

15/09/2021

Table of Contents

Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Operating Principle .......................................................................................................... 5
2.2 Application....................................................................................................................... 5
2.3 Standard Features ............................................................................................................ 6
2.3.1 Water Cooling ....................................................................................................... 6
2.3.2 Temperature Switch .............................................................................................. 6
3 Transport ..................................................................................................................................6
4 Storage .....................................................................................................................................7
5 Installation................................................................................................................................7
5.1 Installation Conditions ...................................................................................................... 7
5.2 Connecting Lines / Pipes .................................................................................................. 8
5.2.1 Gas Flow Variants.................................................................................................. 8
5.2.2 Suction Connection ............................................................................................... 8
5.2.3 Discharge Connection ........................................................................................... 9
5.2.4 Cooling Water Connection .................................................................................... 9
5.3 Filling Oil.......................................................................................................................... 10
5.4 Electrical Connection ........................................................................................................ 125.4.1 Wiring Diagram Three-Phase Motor ...................................................................... 12
5.5 Electrical Connection of the Monitoring Devices............................................................... 14
5.5.1 Wiring Diagram Temperature Switch ..................................................................... 14
6 Commissioning.........................................................................................................................14
6.1 Compression Chamber Flushing ....................................................................................... 15
7 Maintenance.............................................................................................................................16
7.1 Maintenance Schedule ..................................................................................................... 16
7.1.1 With "YLC 250 B" Oil ........................................................................................... 17
7.1.2 With "VE 101" Oil ................................................................................................ 17
7.2 Oil Level Inspection .......................................................................................................... 17
7.3 Oil Colour Inspection ....................................................................................................... 17
7.4 Oil Change....................................................................................................................... 18
8 Overhaul...................................................................................................................................22
9 Decommissioning .....................................................................................................................22
9.1 Dismantling and Disposal ................................................................................................. 23
10 Spare Parts................................................................................................................................23
11 Troubleshooting .......................................................................................................................23
12 Technical Data ..........................................................................................................................26
13 Maximum Permissible Differential Pressures............................................................................27
14 Oil ............................................................................................................................................27
15 EU Declaration of Conformity...................................................................................................28

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Instruction Manual PANDA WZ 0250-2000 B_EN_enSafety | 1

1

SafetyPrior to handling the machine, this instruction manual should be read and understood. Ifanything needs to be clarified, please contact your Busch representative.
Read this manual carefully before use and keep for future reference.
This instruction manual remains valid as long as the customer does not change anything
on the product.
The machine is intended for industrial use. It must be handled only by technically trained
personnel.
Always wear appropriate personal protective equipment in accordance with the local
regulations.
The machine has been designed and manufactured according to state-of-the-art methods. Nevertheless, residual risks may remain. This instruction manual highlights potential
hazards where appropriate. Safety notes and warning messages are tagged with one of
the keywords DANGER, WARNING, CAUTION, NOTICE and NOTE as follows:

DANGER... indicates an imminent dangerous situation that will result in death or serious injuries if
not prevented.

WARNING... indicates a potentially dangerous situation that could result in death or serious injuries.

CAUTION... indicates a potentially dangerous situation that could result in minor injuries.

NOTICE... indicates a potentially dangerous situation that could result in damage to property.

NOTE... indicates helpful tips and recommendations, as well as information for efficient andtrouble-free operation.

Instruction Manual PANDA WZ 0250-2000 B_EN_en

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2 | Product Description

2

Product Description
BPV

OFP

IN

OFP

NP

WZ 2000 B

OUT2 OFP

BPV

IN

OFP

NP

WZ 0250 B
WZ 0500 B

CWO CWICWC OUT2 BGC CWC

OSG

ODP, MPCWICWO

WZ 2000 B

MP

ODP,
MP

TS

CWC OUT BGC ODP, OSGMP
WZ 1000 B

CWC

BGC

OUT

CWC

OSG

TS

ODP, MP

MP

MTB

BGC

Barrier gas connection

BPV

Bypass valve

CWC

Cooling water connection

CWI

Cooling water inlet

CWO

Cooling water outlet

IN

Suction connection

MP

Magnetic plug

MTB

Motor terminal boxMPNP

Nameplate

ODP

Oil drain plug

OFP

Oil fill plug

OSG

Oil sight glass

OUT

Discharge connection

OUT2

Lateral discharge connection (Optional)TS

Temperature switch

NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum
booster’.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enProduct Description | 2

NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.

2.1 Operating Principle

The machine works on the Roots blower principle.
The two oil housings (on each side) allow the lubrication of the gears and bearings.
A bypass valve (BPV) limits automatically the differential pressure between inlet and outlet.

2.2 Application
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic
and non-explosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on themachine and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The vacuum booster is used in combination with a backing pump in vacuum system.
The machine is suitable for continuous operation.
Permitted environmental conditions, see Technical Data [► 26].

NOTICE
Chemical compatibility of the process gases with the machine component materials.
Risk of corrosion inside the compression chamber which can reduce performance andits lifetime!
• Check if the process gases are compatible with those following materials:- Cast iron
- Steel- Aluminium- Epoxy resin- Fluoroelastomer (FKM/FPM)• In doubt, please contact your Busch representative.

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3 | Transport

2.3 Standard Features
2.3.1 Water Cooling
The machine is driven by a water-cooled motor.
Depending on the working conditions, the cooling water can be connected to the covers(CWC).

2.3.2 Temperature Switch
The temperature switch monitors the oil temperature of the machine.
The machine must be stopped when the temperature switch trips (140 °C).

3

Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.

WARNING
Lifting the machine using the motor eye bolt.
Risk of severe injury!
• Do not lift the machine using the eye bolt fitted to the motor. Only lift the machine asshown.

NOTICEIn case the machine is already filled with oil.
Tilting a machine that is already filled with oil can cause large quantities of oil to ingress into the cylinder.
• Drain the oil prior to every transport or always horizontally transport the machine.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enStorage | 4

Machine weight:
see the technical data or the nameplate (NP)Use appropriate slings• Check the machine for transport damage.
If the machine is secured to a base plate:• Remove the machine from the base plate.

4

Storage• Seal all apertures with adhesive tape or reuse provided caps.
• Make sure that the cooling water has been completely removed, see Decommissioning [► 22].
If the machine is to be stored for more than 3 months:• Wrap the machine in a corrosion inhibiting film.
• Store the machine indoors, dry, dust free and if possible in original packaging
preferably at temperatures between -20 ... 55 °C.

5Installation
5.1 Installation Conditions
NOTICEUse of the machine outside of the permitted installation conditions.
Risk of premature failure!
Loss of efficiency!
• Take care that the installation conditions are fully complied with.
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [► 26].
• Make sure to use a suitable backing pump, if necessary seek advice from your Busch
representative• Make sure that the environmental conditions comply with the protection class of the
motor and the electrical instruments.

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5 | Installation• Make sure that the installation space or location is vented such that sufficient coolingof the machine is provided.
• Make sure that the oil sight glass (OSG) remains easily visible.
• Make sure that enough space remains for maintenance work.
• Make sure that the machine is placed or mounted horizontally, a maximum of 1° in
any direction is acceptable.
• Make sure that the machine is secured either from the four feet or from the discharge
flange.
• Check the oil level, see Oil Level Inspection [► 17].
• Make sure that all provided covers, guards, hoods, etc. are mounted.
• Make sure that the cooling water complies with the requirements, see Cooling Water
Connection [► 9].

5.2 Connecting Lines / Pipes• Remove all protective covers before installation.
• Make sure that the connection lines cause no stress on the machine‘s connection; if
necessary use flexible joints.
• Make sure that the line size of the connection lines over the entire length is at least as
large as the connections of the machine.
In case of very long connection lines it is advisable to use larger line sizes in order toavoid a loss of efficiency. Seek advice from your Busch representative.

5.2.1 Gas Flow Variants
The machine can be installed in different ways:
Vertical gas flow

Lateral discharge (Optional)(In some specific cases, other gas flow variantes may apply)

5.2.2 Suction Connection
WARNING
Unprotected suction connection.
Risk of severe injury!
• Do not put hand or fingers in the suction connection.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enInstallation | 5

NOTICE
Ingress of foreign objects or liquids.
Risk of damage to the machine!
If the inlet gas contains dust or other foreign solid particles:• Install a suitable filter (5 micron or less) upstream from the machine.
Connection size(s):– DN100, DIN 28404 for WZ 0250, 0500 B– DN160, DIN 28404 for WZ 1000, 2000 B
Depending on the specific order, other connection dimensions may apply.

5.2.3 Discharge Connection
Connection size(s):– DN100, DIN 28404 for WZ 0250, 0500, 1000 B– DN160, DIN 28404 for WZ 2000 B
Connection size for lateral discharge (OUT2):– DN63, DIN 28404 for WZ 0250, 0500 B– DN100, DIN 28404 for WZ 1000 B– DN160, DIN 28404 for WZ 2000 B
Depending on the specific order, other connection dimensions may apply.
• Make sure that the discharged gas will flow without obstruction. Do not shut off or
throttle the discharge line or use it as a pressurised air source.

5.2.4 Cooling Water Connection• Connect the cooling water connections (CWI / CWO) to the water supply.
Connection size:
Cooling water inlet and outlet on the motor (CWI / CWO):– G1/4 for WZ 0250, 0500, 1000 B– G1/2 for WZ 2000 B
Cooling water connections on the covers (CWC):– G1/2• Make sure that the cooling water complies with the following requirements:
Min. supply capacityl/min
4Water pressurebar

2 ... 5

Supply temperature°C+5 ... +30

Required pressure differential across supply bar
and return≥1• To reduce the maintenance effort and ensure a long product lifetime we recommend
the following cooling water quality:
Hardness
mg/l (ppm) < 90
Properties

Clean & clear

PH value

7 ... 8

Particle size

µm

< 200

Chloride

mg/l

< 100

Electrical conductivity

µS/cm

≤ 100

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5 | Installation

Free chloride

mg/l

< 0.3

Materials in contact with the cooling water Stainless steel, copper and cast iron

NOTE
Water hardness unit conversion.
1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french
degree)5.3 Filling Oil
NOTICEUse of an inappropriate oil.
Risk of premature failure!
Loss of efficiency!
• Only use an oil type which has previously been approved and recommended byBusch.
For oil type and oil capacity see Technical Data [► 26] and Oil [► 27].

Oil filling at the motor side

2

Bu
sc

hO

il

1

4
3

WZ 0250-0500 B

3 mm

WZ 1000-2000 B

MAX
MIN

MIN

MAX

Check oil level

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Instruction Manual PANDA WZ 0250-2000 B_EN_enInstallation | 5

Oil filling at the gear side

2

Bu
sc

hO

il

1

4
3

MIN

MAX

Check oil level

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5 | Installation

When the oil filling is achieved:• Write down the oil change date on the sticker.

Last oil change__ / __ / ____
Oil type see nameplate
Change interval see
instruction manual

If there is no sticker (part no. 0565 568 959) on the machine:• Order it from your Busch representative.

5.4 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the motor.
• The electrical installation must comply with applicable national and international
standards.
• Provide a lockable disconnect switch on the power line so that the machine is completely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1 for the motor.
• Make sure that the motor of the machine will not be affected by electric or electromagnetic disturbance from the mains; if necessary seek advice from Busch.
• Connect the protective earth conductor.
• Electrically connect the motor.

NOTICEThe admissible motor nominal speed exceeds the recommendation.
Risk of damage to the machine!
• Check the admissible motor nominal speed (nmax) on the nameplate of the machine(NP).
• Make sure to comply with it.
• Consult the Technical Data [► 26] to get more information.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enInstallation | 5

5.4.1 Wiring Diagram Three-Phase Motor
NOTICEThe tightening torque does not comply with the recommendation.
Risk of damage the connector threads!
• When connecting up the wires into the terminal box, make sure the tightening torqueof 3 Nm is applied and checked with a calibrated torque wrench.

NOTICE
Incorrect direction of rotation.
Risk of damage to the machine!
• Operation in the wrong direction of rotation can destroy the machine in a short time!
Prior to start-up, ensure that the machine is operated in the right direction.
The intended rotation direction of the motor is defined by the specific instruction labelstuck on the machine.
• Jog the motor briefly.
• With a phase rotation tester, check if the wiring corresponds to the correct direction ofrotation.
If the rotation of the motor must be changed:• Switch any two of the motor phase wires.
Motor connectors:

Connection of motor temperature switches (recommended):

P1
P2

MTS1

MTS2

MTS3

W1
V2
V1
W2
U2
U1

Delta connection (low voltage):

Instruction Manual PANDA WZ 0250-2000 B_EN_en

P1

P2

Control voltage: ≤ 250 V
Max current: 1.6 A
MTS = Motor temperature switch (in motor coil)Star connection (high voltage):

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6 | Commissioning

5.5 Electrical Connection of the Monitoring Devices
NOTE
In order to prevent potential nuisance alarms, Busch recommends that the control system
is configured with a time delay of at least 20 seconds.

5.5.1 Wiring Diagram Temperature Switch
AC (cosφ=1): U = 250 V ; I = 2.5 A
AC (cosφ=0.6): U = 250 V ; 1.6 A
DC: U = 24 V ; I = 1.6 A
DC: U = 48 V ; I = 1.25 A

1

TContact: Normally closed

Connector: WAGO CAGE CLAMP®

Switch point (T): pin 1 + 2 = 140 °C

62Commissioning
CAUTION
During operation the surface of the machine may reach temperatures of more than
70°C.
Risk of burns!
• Avoid contact with the machine during and directly after operation.

CAUTION
Noise of running machine.
Risk of damage to hearing!
If persons are present in the vicinity of a non noise insulated machine over extended periods:• Make sure that ear protection is being used.

NOTICEThe machine can be shipped without oil.
Operation without oil will ruin the machine in short time!
• Prior to commissioning, the machine must be filled with oil, see Filling Oil [► 10].

NOTICE
Lubricating a dry running machine (compression chamber).
Risk of damage to the machine!
• Do not lubricate the compression chamber of the machine with oil or grease.
• Make sure that the installation conditions (see Installation Conditions [► 7]) are met.
• Turn on the water supply.
• Switch on the machine.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enCommissioning | 6• Make sure that the maximum permissible number of starts does not exceed 6 starts
per hour. Those starts should be spread within the hour.
• Make sure that the operating conditions comply with the Technical Data [► 26].
• After a few minutes of operation, perform an Oil Level Inspection [► 17].
As soon as the machine is operated under normal operating conditions:• Measure the motor current and record it as reference for future maintenance andtroubleshooting work.

6.1 Compression Chamber Flushing
Depending on the process type (very demanding application), flushing through the compression chamber (cylinder + lobes) might need to be performed. Seek advice from yourBusch representative.

NOTICE
Flushing without barrier gas.
Risk of damage to the machine!
• The flushing process can pass over into the bearings and the oil chambers!
Do not perform flushing without using the barrier gas.
Beforehand, a barrier gas must be connected according to the following illustration andrecommendations:
Barrier gas configuration for WZ 0250-1000 B
Process flow
inlet (IN)

1x Barrier gas
connection (BGC)

Barrier gas configuration for WZ 2000 B

1x Barrier gas
connection (BGC)

2x Barrier gas
connection (BGC)

Process flow
outlet (OUT)

Process flow
inlet (IN)
2x Barrier gas
connection (BGC)

Process flow
outlet (OUT)

Connection size:– 4 x G3/8 (BGC)
Barrier gas requirements:
Gas type

Dry nitrogen, air or other suitable gas

Gas temperature°C

0 ... 60

Filtrationµm≤5

Gas pressurebar≥ Pressure of flushing fluid + 1 bar

Recommended flow rate
* standard litre per minute

SLM*

30

• Stop the machine.
• Open the gas supply.
• Flush the machine.
When the flushing is finished:• Close the gas supply.
• Dry the machine of flushing fluid.
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7 | MaintenanceDo not operate the machine in normal operating conditions with the barrier gas opened.
It might affect the ultimate pressure and the suction capacity.

7

Maintenance
WARNING
Machines contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:• Wear appropriate personal protective equipment.

CAUTION
Hot surface.
Risk of burns!
• Prior to any action requiring touching the machine, let the machine cool down first.

NOTICE
Using inappropriate cleaners.
Risk of removing safety stickers and protective paint!
• Do not use incompatible solvents to clean the machine.

CAUTION
Failing to properly maintain the machine.
Risk of injuries!
Risk of premature failure and loss of efficiency!
• Respect the maintenance intervals or ask your Busch representative for service.
• Shut down the machine and lock against inadvertent start up.
• Turn off the water supply.
• Vent the connected lines to atmospheric pressure.
If necessary:• Disconnect all connections.

7.1 Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. Theintervals given below are considered as starting values which should be shortened or extended as appropriate. Particularly harsh applications or heavy duty operation, such as
high dust loads in the environment or in the process gas, other contamination or ingressof process material, can make it necessary to shorten the maintenance intervals significantly.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enMaintenance | 7

7.1.1 With "YLC 250 B" OilInterval
Monthly

Maintenance work
• Check the oil level, see Oil Level Inspection [► 17].
• Check the machine for oil leaks - in case of leaks havethe machine repaired (contact Busch).

Yearly• Perform an oil inspection; change it if the oil haschanged its initial colour, see Oil Colour Inspection[► 17].

Every 16000 hours, at the latest after 4 years• Change the oil of the gear and bearing housings(both sides)• Clean the magnetic plugs (MP)• Have a major overhaul on the machine (contact
Busch).

7.1.2 With "VE 101" OilInterval
Monthly

Maintenance work
• Check the oil level, see Oil Level Inspection [► 17].
• Check the machine for oil leaks - in case of leaks havethe machine repaired (contact Busch).

After the first 500 hours• Change the oil of the gear and bearing housings(both sides), see Oil Change [► 18].

Every 6 months• Perform an oil inspection; change it if the oil haschanged its initial colour, see Oil Colour Inspection[► 17].

Every 5000 hours, at the latest • Change the oil of the gear and bearing housings
after 1 year
(both sides)• Clean the magnetic plugs (MP)7.2 Oil Level Inspection• Shut down the machine.
• When the machine is stopped, wait 1 minute before checking the oil level.

MIN

MAX

MIN

MAX

MIN

MAX

• Fill up if necessary, see Oil Filling [► 10].

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7 | Maintenance

7.3 Oil Colour Inspection
WARNING
Oil “YLC 250 B” contaminated chemically or by foreign bodies.
Risk of explosion!
If the oil becomes dark:• Contact your Busch representative without delay.
• Make sure that the oil is either light or transparent.
If the oil becomes dark or looks different from the initial colour:• Change the oil immediately, see Oil Change [► 18].
• See Oil Change [► 18].

You can consult your Busch representative in order to find out why this colour change
has occurred.

7.4 Oil Change
NOTICEUse of an inappropriate oil.
Risk of premature failure!
Loss of efficiency!
• Only use an oil type which has previously been approved and recommended byBusch.

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Instruction Manual PANDA WZ 0250-2000 B_EN_enMaintenance | 7

Oil draining at the motor side
(WZ 0250-0500 B)

3

1

2

Drain pan2xMagnetic plug
Oil draining at the motor side
(WZ 1000-2000 B)

Cleaning cloth

WZ 1000 B

4

WZ 2000 B

5

Cleaning cloth

3

2x
1

WZ 1000 B

WZ 2000 B

2

Magnetic plug
Magnetic plug

Instruction Manual PANDA WZ 0250-2000 B_EN_en

Drain pan

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7 | MaintenanceOil draining at the gear side
(WZ 0250-0500 B)

3

1
2

Magnetic plug
Drain pan
Cleaning cloth
Oil draining at the gear side
(WZ 1000-2000 B)

3

1
2

Magnetic plug
Cleaning cloth

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Drain pan

Instruction Manual PANDA WZ 0250-2000 B_EN_enMaintenance | 7

For oil type and oil capacity see Technical Data [► 26] and Oil [► 27].

Oil filling at the motor side

2

Bu
sc

hO

il

1

4
3

WZ 0250-0500 B

3 mm

WZ 1000-2000 B

MAX
MIN

MAX

MIN

Check oil level
Oil filling at the gear side

2

Bu
sc

hO

il

1

4
3

MIN

MAX

Check oil level

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8 | Overhaul

When the oil filling is achieved:• Write down the oil change date on the sticker.

Last oil change__ / __ / ____
Oil type see nameplate
Change interval see
instruction manual

If there is no sticker (part no. 0565 568 959) on the machine:• Order it from your Busch representative.

8

OverhaulWARNING
Machines contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:• Wear appropriate personal protective equipment.

NOTICE
Improper assembly.
Risk of premature failure!
Loss of efficiency!
• It is highly recommended that any dismantling of the machine that goes beyond anything that is described in this manual should be done through Busch.
In case of the machine having conveyed gas that was contaminated with foreign materials which are dangerous to health:• Decontaminate the machine as much as possible and state the contamination status in a ‘Declaration of Contamination’.
Busch will only accept machines that come with a completely filled in and legally binding
signed ‘Declaration of Contamination’ (form downloadable fromwww.buschvacuum.com).

9

Decommissioning• Shut down the machine and lock against inadvertent start up.
• Turn off the water supply.
• Vent the connected lines to atmospheric pressure.
• Blow through the water cooling inlet with compressed air.
• Disconnect all connections.
If the machine is going to be stored:• See Storage [► 7].

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Instruction Manual PANDA WZ 0250-2000 B_EN_en

Spare Parts | 10

9.1 Dismantling and Disposal• Drain the oil.
• Separate special waste from the machine.
• Dispose of special waste in compliance with applicable regulations.
• Dispose of the machine as scrap metal.

10 Spare Parts
NOTICEUse of non-Busch genuine spare parts.
Risk of premature failure!
Loss of efficiency!
• The exclusive use of Busch genuine spare parts and consumables is recommended forthe correct functioning of the machine and to validate the warranty.
There is no standard spare parts kits available for this product, if you require Busch genuine parts:• Contact your Busch representative for the detailed spare parts list.

11 Troubleshooting
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.

CAUTION
Hot surface.
Risk of burns!
• Prior to any action requiring touching the machine, let the machine cool down first.

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11 | Troubleshooting

ProblemPossible Cause
The machine does not start. The motor is not suppliedwith the correct voltage.

Remedy• Check the power supply.

The lobes are jammed or
seized.

• Lobes inspection or repair
the machine (contact
Busch).

Solid foreign matter has entered the machine.

• Remove the solid foreign
matter or repair the machine (contact Busch).
• Equip the machine with amesh screen at the suction connection.

The temperature switch (TS) • Let the machine cool
reached the switch point.
down.
• See problem “The machine runs too hot”.
The motor is defective.

• Replace the motor.

The machine does not reach Suction or discharge lines• Use larger diameter orthe usual pressure.
too long or section diameter
shorter lines.
too small.
• Seek advice from your local Busch representative.
The backing pump is notcorrectly defined.

• Contact Busch.

The machine runs in thewrong direction.

• Check the direction of rotation, see Wiring Diagram Three-Phase Motor[► 12].

Internal parts are worn or
damaged.

• Repair the machine (contact Busch).

The machine runs very noisi- Wrong oil quantity or unly.
suitable oil type.

• Use one of the recommended oils in the correct
quantity, see Oil [► 27].

The machine runs too hot.

Defective gears, bearings orcoupling element.

• Repair machine (contact
Busch).

Insufficient cooling.

• Make sure to comply withthe cooling water requirements, see Cooling Water
Connection [► 9].
• Use the additional coolingwater connection (CWC).

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Ambient temperature too
high.

• Observe the permitted
ambient temperature, seeTechnical Data [► 26].

Temperature of the processgases at the inlet too high.

• Observe the permitted
gas inlet temperature, seeTechnical Data [► 26].

Oil level too low.

• Top up oil.

The backing pump is notcorrectly defined.

• Contact Busch.

Instruction Manual PANDA WZ 0250-2000 B_EN_enTroubleshooting | 11

The oil is black.

Oil change intervals are toolong.

• Drain the oil and fill in
new oil, see Oil Change[► 18].

The machine runs too hot.

• See problem "The machine runs too hot".

For the solution of problems not mentioned in the troubleshooting chart contact yourBusch representative.

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12 | Technical Data

12 Technical Data
Nominal pumping speed(50Hz / 60Hz)

m³/h

WZ 0250 B
263 / 315

WZ 0500 B
525 / 630

Nominal motor rating(50Hz / 60Hz)kW

1.5 / 1.8

4.0 / 4.4

Nominal motor speed(50Hz / 60Hz)

min-1

1500 / 1800

3000 / 3600

Nominal motor current(delta connection) (50Hz)

A

6.4 / 6.2 / 6.7(200 / 230 / 255 V)

15.9 / 16.6 / 20.0(200 / 230 / 255 V)

Nominal motor current(delta connection) (60Hz)

A

7.3 / 6.3(200 / 277 V)

17.2 / 15.8(200 / 277 V)

Nominal motor current(star connection) (50Hz)A

3.7 / 3.6 / 3.9(346 / 400 / 440 V)

9.2 / 9.5 / 11.7
(346 / 400 / 440 V)

Nominal motor current(star connection) (60Hz)

A

4.2 / 3.6
(346 / 480 V)

9.9 / 9.1
(346 / 480 V)

Ambient temperature range°C

5 … 50Max. gas inlet temperature°C(P <10 hPa, staging ratio of 4)

200

Relative humidity

at 30°C

90%

Leak rate

mbar.l/s≤ 1 x 10-6

Oil capacity (Motor side)

l

0.4

0.4

Oil capacity (Gear side)

l

0.5

0.5

Weight approx.

kg

165

175

Nominal pumping speed(50Hz / 60Hz)

m³/h

WZ 1000 B
1050 / 1260

WZ 2000 B
2120 / 2540

Nominal motor rating(50Hz / 60Hz)kW

4.0 / 4.4

5.5 / 6.6

Nominal motor speed(50Hz / 60Hz)

min-1

3000 / 3600

3000 / 3600

Nominal motor current(delta connection) (50Hz)A

15.9 / 16.6 / 20.0(200 / 230 / 255 V)

21.0 / 20.5 / 25.0(200 / 230 / 255 V)

Nominal motor current(delta connection) (60Hz)

A

17.2 / 15.8(200 / 277 V)

27.0 / 21.0(200 / 277 V)

Nominal motor current(star connection) (50Hz)A

9.2 / 9.5 / 11.7
(346 / 400 / 440 V)

12.2 / 11.7 / 14.3
(346 / 400 / 440 V)

Nominal motor current(star connection) (60Hz)

A

9.9 / 9.1
(346 / 480 V)

15.4 / 12.0(346 / 480 V)

Ambient temperature range°C

5 … 50Max. gas inlet temperature°C(P <10 hPa, staging ratio of 4)

200

Relative humidity

at 30°C

90%

Leak rate

mbar.l/s≤ 1 x 10-6

Oil capacity (Motor side)

l

0.8

1.7

Oil capacity (Gear side)

l

1.2

3.2

Weight approx.

kg

270

510

26 / 32

Instruction Manual PANDA WZ 0250-2000 B_EN_enMaximum Permissible Differential Pressures | 13

13 Maximum Permissible Differential Pressures
3

Blower nominal suction ca- m /h
pacityWZ 2000 B
50 Hz
2000

60 Hz
2400

Backing pump nominal suc- m3/htion capacity

≥ 400

≥ 200

≤ 200

Delta P max. in continuous hPa
operation

43

43

Delta P max. in 50% duty

43

43

Volume max. (every 2 min- l
utes)Standard bypass

N/A

On request On request N/A

On request On request

Volume max. (every 2 min- l
utes)
Rapid pump down bypass(optional)

N/A

On request On request N/A

On request On request

hPa

≥ 480

≥ 240

≤ 240

On request 43

43

On request

On request 43

43

On request

14 OilPart number 0.5 L packaging (~1 kg)
Part number 2.5 L packaging (~5 kg)
ISO-VG
Ambient temperature range [°C]Part number 1 L packaging

YLC 250 B
0831 131 400
0831 514 524
VSC 100
100
0 ... 400831 168 356

Part number 5 L packaging
0831 168 357
To know which oil has been filled in the machine, please refer to the nameplate (NP).

Instruction Manual PANDA WZ 0250-2000 B_EN_en

27 / 32

15 | EU Declaration of Conformity

15 EU Declaration of Conformity
This Declaration of Conformity and the CE-mark affixed to the nameplate are valid for the machine within the
Busch scope of delivery. This Declaration of Conformity is issued under the sole responsibility of the manufacturer.
When this machine is integrated into a superordinate machinery the manufacturer of the superordinate machinery(this can be the operating company, too) must conduct the conformity assessment process for the superordinate
machine or plant, issue the Declaration of Conformity for it and affix the CE-mark.
The manufacturer

Ateliers Busch S.A.
Zone Industrielle
CH-2906 Chevenez

declares that the machine(s): PANDA WZ 0250 B; WZ 0500 B; WZ 1000 B; WZ 2000 B
has (have) been manufactured in accordance with the European Directives:– ‘Machinery’ 2006/42/EC– ‘Electromagnetic Compatibility’ 2014/30/EU– ‘RoHS’ 2011/65/EU + Commission Delegated Directive (EU) 2015/863, restriction of the use of certain hazardous substances in electrical and electronic equipment
and the following standards:
Standard
EN ISO 12100 : 2010

Title of the Standard
Safety of machinery - Basic concepts, general principles of design

ISO 13857 : 2019

Safety of machinery - Safety distances to prevent hazard zones being reachedby the upper and lower limbs

EN 1012-1 : 2010
EN 1012-2 : 1996 + A1 : 2009

Compressors and vacuum pumps - Safety requirements - Part 1 and Part 2

EN ISO 2151 : 2008

Acoustics - Noise test code for compressors and vacuum pumps - Engineering
method (grade 2)

IEC 60204-1 : 2016

Safety of machinery - Electrical equipment of machines - Part 1: General requirements

IEC 61000-6-2 : 2016

Electromagnetic compatibility (EMC) - Generic standards. Immunity for industrial environments

IEC 61000-6-4 : 2018

Electromagnetic compatibility (EMC) - Generic standards. Emission standard
for industrial environments

EN ISO 13849-1 : 2015 (1)Safety of machinery - Safety-related parts of control systems - Part 1: Generalprinciples for design(1)
In case control systems are integrated.
Chevenez, 01.06.2020

Christian Hoffmann, General Director

28 / 32

Instruction Manual PANDA WZ 0250-2000 B_EN_en

Note

Note

Note

Busch
Vacuum Solutions
We shape vacuum for you.

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