BUSCH R5 RU 0050 B User manual

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Instruction Manual
R5
Rotary Vane Vacuum Pumps
RU 0050 B, RU 0070 B
0870167126/A0002_en / Original instructions / Modifications reserved 16/09/2021

Table of Contents
2 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Operating Principle .......................................................................................................... 5
2.2 Application....................................................................................................................... 5
2.3 Standard Features ............................................................................................................ 5
2.3.1 Variable-Frequency Drive ......................................................................................5
2.3.2 LED-Display........................................................................................................... 5
2.3.3 I/O and Communication Port ................................................................................ 5
2.4 Optional Accessories ........................................................................................................ 6
2.4.1 PC-Software..........................................................................................................6
2.4.2 Manual Control Unit .............................................................................................6
3 Transport ..................................................................................................................................7
4 Storage .....................................................................................................................................8
5 Installation................................................................................................................................8
5.1 Installation Conditions...................................................................................................... 8
5.2 Connecting Lines / Pipes .................................................................................................. 9
5.2.1 Suction Connection ...............................................................................................9
5.2.2 Discharge Connection ...........................................................................................9
5.3 Filling Oil.......................................................................................................................... 10
5.4 Electrical Connection ........................................................................................................ 11
5.5 I/O and Communication Port Schematic .......................................................................... 11
6 Commissioning.........................................................................................................................12
6.1 Continuous Operation...................................................................................................... 13
6.2 Fault Reset ....................................................................................................................... 13
7 Maintenance.............................................................................................................................14
7.1 Maintenance Schedule ..................................................................................................... 15
7.2 Oil Level Inspection.......................................................................................................... 15
7.3 Oil Change....................................................................................................................... 16
7.4 Exhaust Filter Change....................................................................................................... 17
8 Overhaul...................................................................................................................................18
9 Decommissioning.....................................................................................................................18
9.1 Dismantling and Disposal ................................................................................................. 19
10 Spare Parts................................................................................................................................19
11 Troubleshooting .......................................................................................................................20
12 Circuit Diagram ........................................................................................................................21
13 Technical Data..........................................................................................................................22
14 Oil ............................................................................................................................................22
15 EU Declaration of Conformity...................................................................................................24
16 UK Declaration of Conformity ..................................................................................................26

Safety | 1
Instruction Manual R5 RU 0050-0070 B_EN_en 3 / 28
1 Safety
Prior to handling the machine, this instruction manual should be read and understood. If
anything 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 and
trouble-free operation.

2 | Product Description
4 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
2 Product Description
LED "A1" NPVFD OS EF IN OUT AF
OFP ODP OSG EB COM MC
AF Axial fan COM I/O and communication port
EB Eye bolt EF Exhaust filter
IN Suction connection LED LED-display (A1 only)
MC Mains conection NP Nameplate
ODP Oil drain plug OFP Oil fill plug
OS Oil separator OSG Oil sight glass
OUT Discharge connection VFD Variable frequency drive
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the
‘vacuum pump’.
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.

Product Description | 2
Instruction Manual R5 RU 0050-0070 B_EN_en 5 / 28
2.1 Operating Principle
The machine works on the rotary vane principle.
The oil seals the gaps, lubricates the vanes and takes away compression heat.
Exhaust filters separate the oil from the discharged gas.
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 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 designed for indoor installation, in case of outdoor installation, ask your
Busch representative in order to take specific precautions.
The machine is capable of maintaining ultimate pressure, see Technical Data [►22].
The machine is suitable for continuous operation under certain conditions, see Continu-
ous Operation [►13].
Permitted environmental conditions, see Technical Data [►22].
2.3 Standard Features
2.3.1 Variable-Frequency Drive
The machine is equipped in standard with a variable-frequency drive.
2.3.2 LED-Display
The LED-Display (LED) indicates the status of the machine.
LED Description
A1 Red = Fault (see chapter Fault Reset [►13])
Green = Healthy
A2 Flashing = RJ45 Communication healthy (just visible with demounted hood)
2.3.3 I/O and Communication Port
The D-Sub 9 supports maintained dry contact remote control and monitoring of the machine.

2 | Product Description
6 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
2.4 Optional Accessories
2.4.1 PC-Software
For parameter settings with personal computers a PC-software and appropriate connec-
tion cable can be provided.
2.4.2 Manual Control Unit
Control panel can be used for simply controlling the machine and parameter setting in
the field.

Transport | 3
Instruction Manual R5 RU 0050-0070 B_EN_en 7 / 28
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 as
shown.
NOTICE
In case the machine is already filled with oil.
Tilting a machine that is already filled with oil can cause large quantities of oil to in-
gress into the cylinder. Starting the machine with excessive quantities of oil in the
cylinder will immediately break the vanes and ruin the machine!
• Drain the oil prior to every transport or always horizontally transport the machine.
• Make sure that the eyebolt(s) (EB) is/are in faultless condition, fully screwed in and
tightened by hand.
Machine weight:
see the technical data or the nameplate (NP)
• Check the machine for transport damage.
If the machine is secured to a base plate:
• Remove the machine from the base plate.

4 | Storage
8 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
4 Storage
• Seal all apertures with adhesive tape or reuse provided caps.
NOTICE
Long storage time.
Risk of damage to the machine!
• Due to a long storage time the capacitors of the variable-frequency drive can lose effi-
ciency because of electrochemical processes. In the worst case, it can lead to a short-
circuit and therefore to a damage to the variable-frequency drive of the machine.
• Connect the machine every 18 months for 30 minutes to the mains.
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 0 ... 40 °C.
5 Installation
5.1 Installation Conditions
NOTICE
Use 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.
~20 cm
~20 cm
~20 cm
~20 cm
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►22].
• Make sure that the environmental conditions comply with the protection class of the
variable-frequency drive, see Technical Data [►22].

Installation | 5
Instruction Manual R5 RU 0050-0070 B_EN_en 9 / 28
• Make sure that the installation space or location is vented such that sufficient cooling
of 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 not to put any pressure on the machine, e.g. by standing on it or storing
objects on it.
• Make sure that the machine is placed or mounted horizontally, a maximum of 1° in
any direction is acceptable.
• Check the oil level, see Oil Level Inspection [►15].
• Make sure that all provided covers, guards, hoods, etc. are mounted.
If the machine is installed at an altitude greater than 1000 meters above sea level:
• Contact your Busch representative, the motor should be derated or the ambient
temperature limited.
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.
5.2.1 Suction Connection
WARNING
Unprotected suction connection.
Risk of severe injury!
• Keep long hair, loose articles of clothing, etc. away from 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):
– ISO-KF 40
5.2.2 Discharge Connection
CAUTION
The discharge gas contains small quantities of oil.
Risk to health!
If air is discharged into rooms where persons are present:
• Make sure that sufficient ventilation is provided.

5 | Installation
10 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
Connection size(s):
– ISO-KF 25
• 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.
Unless the aspirated air is discharged to the environment right at the machine:
• Make sure that the discharge line either slopes away from the machine or provide a
liquid separator or a siphon with a drain cock, so that no liquids can flow back into the
machine.
5.3 Filling Oil
NOTICE
Use 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.
For oil type and oil capacity see Technical Data [►22] and Oil [►22].
4
2
MAX
MIN
3
1
Busch Oil
1x o-ring, part no.:
0486 000 590
Check oil level

Installation | 5
Instruction Manual R5 RU 0050-0070 B_EN_en 11 / 28
5.4 Electrical Connection
DANGER
Carry out any work on the variable-frequency drive and motor.
Risk of electrical shock!
• Electrical installation work must only be executed by qualified personnel.
NOTICE
Perform any flash test or voltage withstand test on the variable-frequency drive.
Risk of damage.
• Any electrical measurements required should be carried out with the variable-frequen-
cy drive disconnected.
• Provide an overload protection according to EN 60204-1 for the machine.
• 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-class of the machine confirms with the requirements of your
supply network system, if necessary provide further interference suppression (EMC-
Class of the machine see Technical Data [►22]).
• Do not use power cables with a length of more than 3 meters. Further be sure that the
power cables and power network are equipped with a protective earth connection.
• Mains connection of the machine is also used as a disconnection device, make sure
that mains connection is easily accessible.
In case of using a residual current protective device:
• Use an all-current sensitive residual current protective device (type B).
• Electrically connect the machine directly to the mains connection (MC).
Connector: EN 60320-C20

6 | Commissioning
12 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
5.5 I/O and Communication Port Schematic
Connector: D-Sub9, 9-pin, female
5 4 3 2 1
9 8 7 6
Pin Nr. Description Signal
1 Digital Output
Status: 0/24 V (max. 20 mA)
Drive healthy. Logic 1 when power is applied to
the drive and no fault exists.
2 0 V / Ground Ground
3 - N/A
4 RS485, D-
5 RS485, D+
6 Digital Input 4*
7 Digital Input 2*
8 Digital Input 1 Open: Stop
Closed: Start
9 24 V Out Power supply (max. 100 mA)
*
For reading status values (current, voltage,
operating hours, etc…) or parameters.
Preset speed
DI2 / DI4
0 / 0 ►speed 1 = 1800 rpm
1 / 0 ►speed 2 = 1600 rpm
0 / 1 ►speed 3 = 1350 rpm
1 / 1 ►speed 4 = 1150 rpm
"Logic 0" ►input voltage = 0 … 4 VDC
"Logic 1" ►input voltage = 8 … 30 VDC
V
Communication port via Modbus (RS485):
Ask your Busch representative for more information.
6 Commissioning
NOTICE
The 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].
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.
• Make sure that the installation conditions (see Installation Conditions [►8]) are met.
• Switch on the machine.

Commissioning | 6
Instruction Manual R5 RU 0050-0070 B_EN_en 13 / 28
NOTICE
Frequent starts and stops by connecting and disconnecting from the power supply.
Risk of damage to the machine!
Starting the machine by connecting and disconnecting the power supply is permitted
max. 1x per minute. Between disconnecting and connecting at least 10 seconds must
have been passed. If the process requires more frequent starts/stops of the machine:
• Use the digital start signal.
• Maximum permissible number of starts by using the digital signal: unlimited
As soon as the machine is operated under normal operating conditions:
• Measure the mains current or read it via PC-Software or controller.
6.1 Continuous Operation
NOTICE
Working at a suction pressure higher than 20 hPa in continuous operation.
Oil will gush out from the exhaust and the machine will run out of oil very quickly!
Operation without oil will ruin the machine in short time!
• Limit the suction pressure in continuous operation.
The operating time in continuous operation is not limited below a suction pressure of 20
hPa abs. (mbar).
6.2 Fault Reset
A fault is indicated by red lighting of the LED ‘A1’ and if connected by the not existing
ready for operation signal (terminal 1 of the D-SUB9 connector).
• Prior to reset a fault find out the possible cause and remedy the fault.
CAUTION
The machine can start immediately when power is supplied.
Risk of inadvertent start-up!
• Make sure that a start-up will not lead to a dangerous situation.
• Reset the fault by disconnecting and reconnecting the power supply for at least 30
seconds.
NOTE
The variable-frequency drive can automatically reset 6 times with an interval of 20 sec-
onds between each reset.

7 | Maintenance
14 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
7 Maintenance
DANGER
The STOP function does not remove potentially lethal high voltages.
Risk of electrical shock.
• Wait 10 minutes before starting any work on it. Never carry out any work on the vari-
able frequency drive, motor or motor cable whilst the input power is still applied.
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
Variable-frequency drive maintenance.
Risk of damage to the variable-frequency drive!
• Maintenance and adjustment must only be executed by qualified personnel.
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.
• Vent the connected lines to atmospheric pressure.
If necessary:
• Disconnect all connections.

Maintenance | 7
Instruction Manual R5 RU 0050-0070 B_EN_en 15 / 28
DANGER
Maintenance work without disconnecting the variable-frequency drive.
Risk of electrical shock.
• Disconnect and isolate the variable-frequency drive before attempting any work on it.
High voltages are present at the terminals and within the variable-frequency drive for
up to 10 minutes after disconnection of the electrical supply.
• Always ensure by using a suitable multimeter that no voltage is present on any drive
power terminals prior to commencing any work.
DANGER
Live wires. Carry out any work on the variable-frequency drive and motor.
Risk of electrical shock!
• Electrical installation work must only be executed by qualified personnel.
7.1 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 applica-
tions or heavy duty operation, such as high dust loads in the environment or
in the process gas, other contamination or ingress of process material, can
make it necessary to shorten the maintenance intervals significantly.
Interval Maintenance work
Weekly • Check the oil level, see Oil Level Inspection [►15].
• Check the machine for oil leaks - in case of leaks have
the machine repaired (contact Busch).
Every 6 months • Clean the machine from dust and dirt.
• Make sure that the electronic components and the
cooling fan are free from dust.
Yearly • Change the exhaust filters (EF), see Exhaust Filter
Change [►17].
Every 8000 hours • Change the oil, see Oil Change [►16].
7.2 Oil Level Inspection
• Shut down the machine.
• When the machine is stopped, wait 1 minute before checking the oil level.
MAX
MIN
MAX
MIN
MAX
MIN
• Fill up if necessary, see Oil Filling [►10].

7 | Maintenance
16 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
7.3 Oil Change
NOTICE
Use 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.
1
2
Drain pan
1x o-ring, part no.:
0486 000 505

Maintenance | 7
Instruction Manual R5 RU 0050-0070 B_EN_en 17 / 28
For oil type and oil capacity see Technical Data [►22] and Oil [►22].
4
2
MAX
MIN
3
1
Busch Oil
1x o-ring, part no.:
0486 000 590
Check oil level
7.4 Exhaust Filter Change
1
2
10 mm wrench
4x

8 | Overhaul
18 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
1
2
O- ring
10 mm wrench
4x
1x flat gasket,
part no.: 0480 000 112
Busch genuine spare parts
1x Exhaust filter (EF),
part no.: 0532 140 156
8 Overhaul
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.
NOTICE
Improper assembly.
Risk of premature failure!
Loss of efficiency!
• It is highly recommended that any dismantling of the machine that goes beyond any-
thing that is described in this manual should be done through Busch.
In case of the machine having conveyed gas that was contaminated with foreign materi-
als which are dangerous to health:
• Decontaminate the machine as much as possible and state the contamination sta-
tus 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).
9 Decommissioning
• Shut down the machine and lock against inadvertent start up.
• Vent the connected lines to atmospheric pressure.
• Disconnect all connections.

Spare Parts | 10
Instruction Manual R5 RU 0050-0070 B_EN_en 19 / 28
If the machine is going to be stored:
• See Storage [►8].
9.1 Dismantling and Disposal
• 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
NOTICE
Use 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 correct functioning of the machine and to validate the warranty.
Spare parts kit Description Part no.
Service kit
(RU 0050-0070 B)
Includes all the necessary parts for
maintenance.
0992 239 323
If other parts are required:
• Contact your Busch representative.

11 | Troubleshooting
20 / 28 Instruction Manual R5 RU 0050-0070 B_EN_en
11 Troubleshooting
DANGER
Live wires. Carry out any work on the variable-frequency drive and motor.
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.
NOTICE
Variable-frequency drive maintenance.
Risk of damage to the variable-frequency drive!
• Maintenance and adjustment must only be executed by qualified personnel.
Illustration showing parts that may be involved during troubleshooting:
Problem Possible Cause Remedy
The machine does not start. The variable-frequency drive
(VFD) is not supplied with
the correct voltage.
• Check the power supply.
No start signal. • Check the connection.
The motor or the variable
frequency drive (VFD) is de-
fective.
• Check the LED on the
variable frequency drive
display, if red, it is faulty
(contact Busch or read
error with software).
The coupling (CPL) is defec-
tive.
• Replace the coupling
(CPL).
The machine does not reach
the usual pressure on the
suction connection.
Oil level too low. • Top up oil.
The inlet screen (IS) is par-
tially clogged.
• Clean the inlet screen (IS).
Internal parts are worn or
damaged.
• Repair the machine
(contact Busch).
The machine runs very noisily. Worn coupling (CPL). • Replace the coupling
(CPL).
Stuck vanes. • Repair the machine
(contact Busch).
Defective bearings. • Repair the machine
(contact Busch).
The oil is black. Oil change intervals are too
long.
• Drain the oil and fill in
new oil, see Oil Change.
The machine runs too hot. • See problem "The
machine runs too hot".
The oil is emulsified. The machine sucked in liq-
uids or significant amounts
of vapour.
• Flush the machine
(contact Busch).
For the solution of problems not mentioned in the troubleshooting chart contact your
Busch representative.