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Vacuum Boosters
WZ 0250 B, WZ 0500 B

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Instruction Manual

0870565695 | A0006_en-US | Original instructions

6/20/2022

Table of Contents

Table of Contents
1

Safety.....................................................................................................................................................................

3

2

Product Description .............................................................................................................................................

4

2.1

Operating Principle .............................................................................................................................................

5

2.2

Intended Use .......................................................................................................................................................

5

2.3

Standard Features...............................................................................................................................................
2.3.1
Water Cooling........................................................................................................................................
2.3.2
Temperature Switch .............................................................................................................................

6
6
6

3

Transport ..............................................................................................................................................................

7

4

Storage ..................................................................................................................................................................

8

5

Installation ...........................................................................................................................................................

9

5.1

Installation Conditions........................................................................................................................................

9

5.2

Connecting Lines / Pipes ....................................................................................................................................
5.2.1
Gas Flow Variants..................................................................................................................................
5.2.2
Suction Connection...............................................................................................................................
5.2.3
Discharge Connection ..........................................................................................................................
5.2.4
Cooling Water Connection...................................................................................................................

9
10
10
10
11

5.3

Filling Oil...............................................................................................................................................................

11

Electrical Connection...........................................................................................................................................

14

6.1

Machine delivered without Control Box or Variable Speed Drive (VSD).......................................................

14

6.2

Wiring Diagram Three-Phase Motor.................................................................................................................

15

6.3

Electrical Connection of the Monitoring Devices ............................................................................................
6.3.1
Wiring Diagram Temperature Switch.................................................................................................

16
16

Commissioning.....................................................................................................................................................

17

7.1

Compression Chamber Flushing .......................................................................................................................

17

Maintenance.........................................................................................................................................................

19

8.1

Maintenance Schedule .......................................................................................................................................
8.1.1
With "YLC 250 B" Oil..............................................................................................................................
8.1.2
With "VSC 100" Oil.................................................................................................................................

20
20
20

8.2

Oil Level Inspection.............................................................................................................................................

20

8.3

Oil Color Inspection ............................................................................................................................................

21

8.4

Oil Change............................................................................................................................................................

21

9

Overhaul................................................................................................................................................................

25

10

Decommissioning.................................................................................................................................................

26

10.1

Dismantling and Disposal ..................................................................................................................................

26

11

Spare Parts............................................................................................................................................................

27

12

Troubleshooting...................................................................................................................................................

28

13

Technical Data ......................................................................................................................................................

30

14

Oil ...........................................................................................................................................................................

31

15

EU Declaration of Conformity.............................................................................................................................

32

16

UK Declaration of Conformity ............................................................................................................................

33

6

7
8

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Instruction Manual PANDA WZ 0250-0500 B_EN_enSafety | 1

1

SafetyPrior to handling the machine, this instruction manual should be read and understood. If anythingneeds 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, as described in the following chapters and in accordancewith the chapter Intended Use [➔ 5]. This instruction manual highlights potential hazards whereappropriate. 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 notprevented.

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 0250-0500 B_EN_en

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2 | Product Description

2

Product Description
BPV

OFP
IN

CWC
CWI

OFP

BPV

OUT
BGC
OFP
TS

OFP

MTB
OSG
ODP, MP

NP

OSG
CWO

ODP,
MP

CWC OUT2ODP,MPBGC CWC

Description
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 box

NP

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 0250-0500 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 Booster 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

Intended Use
WARNING
In case of foreseeable misuse outside the intended use of the machine.
Risk of injuries!
Risk of damages to the machine!
Risk of damages to the environment!
● Make sure to follow all instructions described in this manual.
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic and nonexplosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on the machine
and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The machine is used in combination with a backing pump in vacuum system.
The machine is suitable for continuous operation.
Permitted environmental conditions, see Technical Data [➔ 30].

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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2 | Product Description

NOTICE
Chemical compatibility of the process gases with the machine component materials.
Risk of corrosion inside the compression chamber which can reduce performance and its
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.

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).

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Instruction Manual PANDA WZ 0250-0500 B_EN_enTransport | 3

3Transport
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 as shown.

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.
● To find out the weight of the machine, refer to the chapter Technical Data [➔ 30] 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.
Instruction Manual PANDA WZ 0250-0500 B_EN_en

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4 | Storage

4

Storage● Seal all apertures with adhesive tape or reuse provided caps.
● Make sure that the cooling water has been completely removed, see Decommissioning [➔ 26].
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 attemperatures between -20 ... 55 °C.

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Instruction Manual PANDA WZ 0250-0500 B_EN_enInstallation | 55Installation

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 [➔ 30].
● 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 andthe electrical elements.
● Make sure that the installation space or location is vented such that sufficient cooling of themachine 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 directionis 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 [➔ 20].
● 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[➔ 11].

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 long connection lines it is advisable to use larger line sizes in order to avoid a loss of
efficiency. Seek advice from your Busch representative.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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5 | Installation

5.2.1

Gas Flow Variants
The machine can be installed in different ways:

1

2

Description
1

5.2.2

Vertical gas flow2

Lateral discharge (Optional)

Suction Connection

WARNING
Unprotected suction connection.
Risk of severe injury!
● Do not put hand or fingers in the suction connection.

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
Depending on the specific configuration ordered, other connection dimensions may apply.

5.2.3

Discharge Connection

NOTICE
Discharge gas flow obstructed.
Risk of damage to the machine!
● Make sure that the discharged gas will flow without obstruction. Do not shut off or throttle thedischarge line or use it as a pressurized air source.

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Instruction Manual PANDA WZ 0250-0500 B_EN_enInstallation | 5Connection size(s):– DN100, DIN 28404 for WZ 0250, 0500 B
Connection size for lateral discharge (OUT2):– DN63, DIN 28404 for WZ 0250, 0500 B
Depending on the specific configuration ordered, other connection dimensions may apply.

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 B
Cooling water connections on the covers (CWC):– G1/2● Make sure that the cooling water complies with the following requirements:
Min. supply capacity

l/min

4

Water pressurebar

2 ... 5

Supply temperature°C+5 ... +30

Required pressure differential across supply
and return

bar

≥1

● To reduce the maintenance effort and ensure a long product lifetime we recommend thefollowing cooling water quality:
Hardness

mg/l (ppm)

Properties

Clean & clear

PH value< 90
7 ... 8

Particle size

µm

< 200

Chloride

mg/l

< 100

Electrical conductivity

µS/cm

≤ 100

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 by Busch.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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5 | Installation
For oil type and oil capacity see Technical Data [➔ 30] and Oil [➔ 31].

12 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enInstallation | 5
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.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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6 | Electrical Connection

6

Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

CURRENT PROTECTION OF THE CUSTOMER INSTALLATION:DANGER
Missing current protection.
Risk of electrical shock.
● Current protection according to EN 60204-1 must be insured by the customer on its installation.
● The electrical installation must comply with the applicable national and international standards.

NOTICE
Electromagnetic compatibility.
● Make sure that the motor of the machine will not be affected by electric or electro- magnetic
disturbance from the mains, if necessary seek advice from Busch.
● Make sure that the EMC of the machine is compliant with the requirements of your supply
network system, if necessary provide further interference suppression (EMC of the machine, see
EU Declaration of Conformity [➔ 32] or UK Declaration of Conformity [➔ 33]).

6.1

Machine delivered without Control Box or Variable
Speed Drive (VSD)DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

NOTE
The operation with variable speed, i.e. with a variable speed drive or a soft starter unit, isallowed as long as the motor is capable and the permitted motor speed range is respected(see Technical Data [➔ 30]).
Seek advice from your Busch representative.

14 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enElectrical Connection | 6● Make sure that the power supply for the motor is compatible with the data on the nameplate of
the motor.
● If the machine is equipped with a power connector, install a residual current protective device toprotect persons in case of isolation default.
● Busch recommends installing a type B residual protective device suitable for the electricalinstallation.
● Provide a lockable disconnect switch or an emergency stop switch on the power line so that themachine is completely secured in case of an emergency situation.
● 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.
● Busch recommends installing a D-curve circuit breaker.
● Connect the protective earth conductor.
● Electrically connect the motor.

NOTICE
Incorrect connection.
Risk of damage to the motor!
● The wiring diagrams given below are typical. Check the inside of the terminal box for motor
connection instructions/diagrams.

6.2

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 torque of 3 Nm isapplied 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 tostart-up, ensure that the machine is operated in the right direction.
The intended rotation direction of the motor is defined by the specific instruction label stuck on themachine.
● Jog the motor briefly.
● With a phase rotation tester, check if the wiring corresponds to the correct direction of rotation.
If the rotation of the motor must be changed:● Switch any two of the motor phase wires.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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6 | Electrical Connection
Motor connectors:

Connection of motor temperature switches(recommended):

P1
P2

MTS1

MTS2

MTS3

W1
V2

P1

V1
W2
U2
U1

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

Delta connection (low voltage):

6.3

P2

Star connection (high voltage):

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

6.3.1

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
Contact: Normally closed
Switch point (T): pin 1 + 2 = 140 °C

16 | 36

1

T

2

Connector: WAGO CAGE CLAMP®

Instruction Manual PANDA WZ 0250-0500 B_EN_enCommissioning | 7

7Commissioning
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 [➔ 11].

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 [➔ 9]) are met.
● Turn on the water supply.
● Switch on the machine.
● 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 [➔ 30].
● After a few minutes of operation, perform an Oil Level Inspection [➔ 20].
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.

7.1

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 your Busch
representative.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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7 | Commissioning

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:
1
4

3

2

Description
1

Process flow inlet (IN)2

Process flow outlet (OUT)

3

Barrier gas connection (BGC)

4Barrier gas connection (BGC)

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

SLM*

30

* standard liter per minute● 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.
Do not operate the machine in normal operating conditions with the barrier gas opened. It might
affect the ultimate pressure and the suction capacity.

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Instruction Manual PANDA WZ 0250-0500 B_EN_enMaintenance | 8

8

Maintenance
DANGER
Live wires.
Risk of electrical shock.
● Electrical installation work must only be executed by qualified personnel.

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.

CAUTION
Failing to properly maintain the machine.
Risk of injuries!
Risk of premature failure and loss of efficiency!
● Maintenance work must only be executed by qualified personnel.
● Respect the maintenance intervals or ask your Busch representative for service.

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

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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8 | Maintenance

8.1

Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The intervals
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 theenvironment or in the process gas, other contamination or ingress of process material, can make itnecessary to shorten the maintenance intervals significantly.

8.1.1

With "YLC 250 B" OilInterval

Maintenance work

Monthly● Check the oil level, see Oil Level Inspection [➔ 20].
● Check the machine for oil leaks - in case of leaks have themachine repaired (contact Busch).

Yearly● Perform an oil inspection; change it if the oil has changed
its initial color, see Oil Color Inspection [➔ 21].

Every 16000 hours or after 4
years● Change the oil of the gear and bearing housings (bothsides)● Clean the magnetic plugs (MP)● Have a major overhaul on the machine (contact Busch).

8.1.2

With "VSC 100" OilInterval

Maintenance work

Monthly● Check the oil level, see Oil Level Inspection [➔ 20].
● Check the machine for oil leaks - in case of leaks have themachine repaired (contact Busch).

After the first 500 hours● Change the oil of the gear and bearing housings (bothsides), see Oil Change [➔ 21].

Every 6 months● Perform an oil inspection; change it if the oil has changed
its initial color, see Oil Color Inspection [➔ 21].

Every 5000 hours or after 1 year

● Change the oil of the gear and bearing housings (bothsides)● Clean the magnetic plugs (MP)8.2

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 [➔ 11].

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Instruction Manual PANDA WZ 0250-0500 B_EN_enMaintenance | 8

8.3

Oil Color 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 color:● Change the oil immediately, see Oil Change [➔ 21].

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

8.4

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 by Busch.

NOTICE
Replace the magnetic plug.
Risk of damage to the motor bearing!
● At every oil change, it is necessary to replace the magnetic plug, due to wear and tear of the seal.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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8 | Maintenance

22 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enMaintenance | 8
For oil type and oil capacity see Technical Data [➔ 30] and Oil [➔ 31].

Instruction Manual PANDA WZ 0250-0500 B_EN_en

23 | 36

8 | Maintenance
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.

24 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enOverhaul | 99OverhaulWARNING
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!
● Any dismantling of the machine that goes beyond anything that is described in this manual
should be done by Busch authorized technicians.
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 from www.buschvacuum.com).

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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10 | Decommissioning

10

Decommissioning
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.
● Shut down the machine and lock against inadvertent start up.
● Disconnect the power supply.
● 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 [➔ 8].

10.1

Dismantling and Disposal● Drain and collect the oil.
● Make sure that no oil drips onto the floor.
● Separate special waste from the machine.
● Dispose of special waste in compliance with applicable regulations.
● Dispose of the machine as scrap metal.

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Instruction Manual PANDA WZ 0250-0500 B_EN_en

Spare Parts | 11

11

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 for the correctfunctioning 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.

Instruction Manual PANDA WZ 0250-0500 B_EN_en

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12 | Troubleshooting

12

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.
ProblemPossible Cause

RemedyThe machine does not start.

The motor is not supplied withthe correct voltage.

● Check the power supply.

The lobes are jammed or
seized.

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

Solid foreign matter hasentered the machine.

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

The machine does not reachthe usual pressure.

The machine runs very noisily.

28 | 36

The temperature switch (TS)reached the switch point.

● Let the machine cool down.

The motor is defective.

● Replace the motor.

Suction or discharge lines toolong or section diameter too
small.

● Use larger diameter or
shorter lines.

The backing pump is notcorrectly defined.

● Contact Busch.

The machine runs in the wrong
direction.

● Check the direction ofrotation, see Wiring Diagram
Three-Phase Motor [➔ 15].

Internal parts are worn or
damaged.

● Repair the machine (contact
Busch).

Wrong oil quantity or
unsuitable oil type.

● Use one of therecommended oils in thecorrect quantity, see Oil[➔ 31].

Defective gears, bearings orcoupling element.

● Repair machine (contact
Busch).

● See problem “The machineruns too hot”.

● Seek advice from your local
Busch representative.

Instruction Manual PANDA WZ 0250-0500 B_EN_enTroubleshooting | 12
ProblemPossible Cause

RemedyThe machine runs too hot.

Insufficient cooling.

● Make sure to comply withthe cooling waterrequirements, see Cooling
Water Connection [➔ 11].
● Use the additional coolingwater connection (CWC).

The oil is black.

Ambient temperature too high.

● Observe the permitted
ambient temperature, seeTechnical Data [➔ 30].

Temperature of the processgases at the inlet too high.

● Observe the permitted gas
inlet temperature, seeTechnical Data [➔ 30].

Oil level too low.

● Top up oil.

The backing pump is notcorrectly defined.

● Contact Busch.

Oil change intervals are toolong.

● Drain the oil and fill in newoil, see Oil Change [➔ 21].

The machine runs too hot.

● See problem "The machineruns too hot".

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

Instruction Manual PANDA WZ 0250-0500 B_EN_en

29 | 36

13 | Technical Data

13

Technical Data
WZ 0250 B

WZ 0500 B

Nominal pumping speed(50Hz / 60Hz)

m³/h

263 / 315

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)

Sound pressure level**(50Hz / 60Hz)dB(A)On request

59 / 63

Uncertainty KpA

dB

3

Ambient temperature
range

°C

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

°C

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

** according to DIN EN ISO 2151. Operation under ultimate pressure. Pressure level above 10 mbar may
result in higher noise levels.

30 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enOil | 14

14

Oil
YLC 250 B
Part number 0.5 L packaging (~1 kg)

0831 131 400

Part number 2.5 L packaging (~5 kg)

0831 514 524
VSC 100

ISO-VG

100

Ambient temperature range [°C]

0 ... 40

Part number 1 L packaging

0831 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 0250-0500 B_EN_en

31 | 36

15 | EU Declaration of Conformity

15

EU Declaration of Conformity

This Declaration of Conformity and the CE-markings 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 operatingcompany, too) must conduct the conformity assessment process for the superordinate machine or plant, issue the Declaration of Conformity for it andaffix the CE-marking.
The manufacturer is determined by the serial number:
Serial number starts with CHM1…

Serial number starts with KRM1…

Ateliers Busch S.A.
Zone industrielle
2906 Chevenez
Switzerland

Busch Manufacturing Korea, Ltd.
189-51, Soicheon-ro, Majang-myun
Icheon-si, Gyunggi-do, 467-813
Republic of Korea

declares that the machine: PANDA WZ 0250 B; PANDA WZ 0500 B
fulfill(s) all the relevant provisions from EU directives:–‘Machinery’ 2006/42/EC–‘Electromagnetic Compatibility’ (EMS) 2014/30/EU–‘RoHS’ 2011/65/EU Restriction of the use of certain hazardous substances in electrical and electronic equipment (incl. all related applicableamendments)

and comply(-ies) with the following designated standards that have been used to fulfill those provisions:Standards

Title of the Standard

EN ISO 12100 : 2010

Safety of machinery - Basic concepts, general principles of design

EN ISO 13857 : 2019

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

EN 1012-2 : 1996 + A1 : 2009

Vacuum pumps - Safety requirements - Part 2

EN ISO 2151 : 2008

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

EN 60204-1 : 2018

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

EN IEC 61000-6-2 : 2019

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

EN IEC 61000-6-4 : 2019

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

Legal person authorized to compile the technical fileand authorized representative in the EU(if the manufacturer is not located in the EU):

Busch Dienste GmbH
Schauinslandstr. 1
DE-79689 Maulburg

Chevenez, 12.10.2021

Icheon-si, 12.10.2021

Christian Hoffmann

Seung-hwa Yoo

General Manager

General Director

Ateliers Busch S.A.

Busch Manufacturing Korea, Ltd

32 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_en

UK Declaration of Conformity | 16

16

UK Declaration of Conformity

This Declaration of Conformity and the UKCA-markings 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 operatingcompany, too) must conduct the conformity assessment process for the superordinate machine or plant, issue the Declaration of Conformity for it andaffix the UKCA-marking.
The manufacturer is determined by the serial number:
Serial number starts with CHM1…

Serial number starts with KRM1…

Ateliers Busch S.A.
Zone industrielle
2906 Chevenez
Switzerland

Busch Manufacturing Korea, Ltd.
189-51, Soicheon-ro, Majang-myun
Icheon-si, Gyunggi-do, 467-813
Republic of Korea

declares that the machine: PANDA WZ 0250 B; PANDA WZ 0500 B
fulfill(s) all the relevant provisions from UK legislations:–

Supply of Machinery (Safety) Regulations 2008–

Electromagnetic Compatibility Regulations 2016–

Restriction of the use of certain hazardous substances in Electrical and Electronic Equipment Regulations 2021

and comply(-ies) with the following designated standards that have been used to fulfill those provisions:Standards

Title of the Standard

EN ISO 12100 : 2010

Safety of machinery - Basic concepts, general principles of design

EN ISO 13857 : 2019

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

EN 1012-2 : 1996 + A1 : 2009

Vacuum pumps - Safety requirements - Part 2

EN ISO 2151 : 2008

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

EN 60204-1 : 2018

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

EN IEC 61000-6-2 : 2019

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

EN IEC 61000-6-4 : 2019

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

Legal person authorized to compile the technical fileand importer in the UK(if the manufacturer is not located in the UK):

Busch (UK) Ltd
30 Hortonwood
Telford - UK

Chevenez, 12.10.2021

Icheon-si, 12.10.2021

Christian Hoffmann

Seung-hwa Yoo

General Manager

General Director

Ateliers Busch S.A.

Busch Manufacturing Korea, Ltd

Instruction Manual PANDA WZ 0250-0500 B_EN_en

33 | 36

Notes34 | 36

Instruction Manual PANDA WZ 0250-0500 B_EN_enInstruction Manual PANDA WZ 0250-0500 B_EN_en

35 | 36

Busch
Vacuum Solutions
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Busch has a global presence. In every country, highly competent local personnel delivers
custom-tailored support backed by a global network of expertise. Wherever you are.
Whatever your business. We are there for you.

●

Local representatives and distributors●

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Busch production site

0870565695 | A0006_en-US

www.buschvacuum.com