BUSCH R 5 series User manual

Instruction Manual
R5
Rotary Vane Vacuum Pumps
RB 0021 C
RC 0021 C
0870146978/A0001_en / Original instructions / Modifications reserved 13/02/2020
Busch Produktions GmbH
Schauinslandstraße 1, 79689 Maulburg
Germany

Table of Contents
2 / 24 0870146978_RB_RC0021C_A0001_IM_en
Table of Contents
1 Safety........................................................................................................................... 3
2 Product Description ..................................................................................................... 4
2.1 Operating Principle............................................................................................... 4
2.2 Application ........................................................................................................... 5
2.3 Optional Accessories............................................................................................. 5
2.3.1 Gas Ballast Valve........................................................................................6
2.3.2 Inlet Filter ..................................................................................................6
2.3.3 Filter pressure gauge..................................................................................6
3 Transport ..................................................................................................................... 6
4 Storage......................................................................................................................... 7
5 Installation................................................................................................................... 8
5.1 Installation Conditions ..........................................................................................8
5.2 Connecting Lines / Pipes ......................................................................................8
5.2.1 Suction Connection....................................................................................9
5.2.2 Discharge Connection................................................................................9
5.3 Filling Oil..............................................................................................................10
5.4 Electrical Connection ............................................................................................11
5.4.1 Wiring Diagram Single-Phase Motor..........................................................11
5.4.2 Wiring Diagram Three-Phase Motor ..........................................................12
6 Commissioning............................................................................................................ 13
6.1 Version with Oil Return Valve............................................................................... 13
6.2 Conveying Condensable Vapours ......................................................................... 13
7 Maintenance................................................................................................................ 14
7.1 Maintenance Schedule.......................................................................................... 15
7.2 Oil Level Inspection .............................................................................................. 15
7.3 Oil Change...........................................................................................................15
7.4 Exhaust Filter Change ...........................................................................................17
8 Overhaul...................................................................................................................... 18
9 Decommissioning ........................................................................................................ 18
9.1 Dismantling and Disposal...................................................................................... 18
10 Spare Parts................................................................................................................... 19
11 Troubleshooting........................................................................................................... 20
12 Technical Data ............................................................................................................. 22
13 Oil ............................................................................................................................... 22
14 EU Declaration of Conformity ...................................................................................... 23

Safety | 1
0870146978_RB_RC0021C_A0001_IM_en 3 / 24
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 meth-
ods. 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 / 24 0870146978_RB_RC0021C_A0001_IM_en
2 Product Description
EF INOUT
GBTL
NP
OSG ODP
OFPMTB DA
Version with gas ballast valve
OS
DA Directional arrow EF Exhaust filter
GB Gas ballast valve IN Suction connection
NP Nameplate MTB Motor terminal box
ODP Oil drain plug OFP Oil fill plug
OS Oil separator OSG Oil sight glass
OUT Discharge connection TL Transport lug
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
0870146978_RB_RC0021C_A0001_IM_en 5 / 24
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].
Depending on the version, the operating time of the machine can be limited as followed:
Machine version Operating time
RB 0021 C The machine is suitable for intermittent operation only.
At the latest after 2 hours of continuous operation, the
machine must be shut down for at least 15 minutes.
Not to be used for continuous operation especially at
rough vacuum.
RB 0021 C - with oil return line
to the B-cover
The machine is suitable for continuous operation across
the whole pressure range.
RC 0021 C – with oil return line
to inlet flange.
The machine is suitable for continuous operation at
rough vacuum.
Permitted environmental conditions, see Technical Data [►22].
The machine is a built-in pump designed for vacuum packaging machines.

3 | Transport
6 / 24 0870146978_RB_RC0021C_A0001_IM_en
2.3 Optional Accessories
2.3.1 Gas Ballast Valve
The gas ballast valve mixes the process gas with a limited quantity of ambient air to
counteract the condensation of vapour inside the machine.
The gas ballast valve has an influence on the ultimate pressure of the machine, see Tech-
nical Data [►22].
2.3.2 Inlet Filter
The inlet filter protects the machine against dust and other solids in the process gas. The
inlet filter is available with a paper or polyester cartridge.
2.3.3 Filter pressure gauge
Use the filter pressure gauge for checking the degree of clogging of the exhaust filter.
3 Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.
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.

Storage | 4
0870146978_RB_RC0021C_A0001_IM_en 7 / 24
Ø8 mm
Machine weight: see the technical data or the nameplate (NP)
Lifting with the transport lug (TL)
Lifting with a sling:
make sure the machine is
properly fastened to the lifting sling.
• 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.
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
8 / 24 0870146978_RB_RC0021C_A0001_IM_en
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
motor and the electrical instruments.
• Make sure that the installation space or location is vented such that sufficient cooling
of the machine is provided.
• Make sure that cooling air inlets and outlets are not covered or obstructed and that
the cooling air flow is not affected adversely in any other way.
• 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.
• 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.

Installation | 5
0870146978_RB_RC0021C_A0001_IM_en 9 / 24
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 to
avoid a loss of efficiency. Seek advice from your Busch representative.
5.2.1 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):
Depending on the specific order, other connection dimensions may apply.
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.
Connection size(s):
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.
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 li-
quid separator or a siphon with a drain cock, so that no liquids can flow back into the
machine.

5 | Installation
10 / 24 0870146978_RB_RC0021C_A0001_IM_en
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].
1
4
MAX
MIN
3
2
Busch Oil
Check oil level 1x o-ring part no.:
0486 000 590

Installation | 5
0870146978_RB_RC0021C_A0001_IM_en 11 / 24
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 com-
pletely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1 for the motor.
• Busch recommends installing a D-curve circuit breaker.
• 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.
• Connect the protective earth conductor.
• Electrically connect the motor.
5.4.1 Wiring Diagram Single-Phase Motor
Connection Scheme of Alternating Current Motor
Explanation of color coding:
BK = black
BN = brown
BU = blue
GN = green
RD = red
YE = yellow

5 | Installation
12 / 24 0870146978_RB_RC0021C_A0001_IM_en
5.4.2 Wiring Diagram Three-Phase Motor
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.
• Determine the intended direction of rotation with the arrow (stuck on or cast).
• Jog the motor briefly.
• Watch the fan wheel of the motor and determine the direction of rotation just before
the fan wheel stops.
If the rotation of the motor must be changed:
• Switch any two of the motor phase wires.
Delta connection (low voltage): Star connection (high voltage):

Commissioning | 6
0870146978_RB_RC0021C_A0001_IM_en 13 / 24
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.
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.
• Make sure that the installation conditions (see Installation Conditions [►8]) are met.
• Switch on the machine.
• Make sure that the maximum permissible number of starts does not exceed 12 starts
per hour. Those starts should be spread within the hour.
• Make sure that the operating conditions comply with the Technical Data [►22].
• After a few minutes of operation, check the oil level and top up if necessary.
As soon as the machine is operated under normal operating conditions:
• Measure the motor current and record it as reference for future maintenance and
troubleshooting work.
6.1 Version with Oil Return Valve
During operation oil accumulates at the bottom of the upper chamber of the oil separ-
ator, which cannot flow down into the bottom chamber, as long as the machine runs.
After 2hours of continuous operation, in case of high pressure difference between suc-
tion side and pressure side after a shorter period:
• Shut down the machine for at least 15 minutes.
ðThe oil can run down from the upper chamber of the oil separator into the bottom
chamber

7 | Maintenance
14 / 24 0870146978_RB_RC0021C_A0001_IM_en
6.2 Conveying Condensable Vapours
Water vapour within the gas flow is tolerated within certain limits. The conveyance of
other vapours shall be agreed upon with Busch.
If condensable vapours are to be conveyed:
30 minutes
* not included in the scope of delivery
• Close the isolation
valve* • Warm up the machine
• Open the isolation
valve and perform the
process
• Close the isolation
valve
END
START
30 minutes
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.
• Vent the connected lines to atmospheric pressure.
If necessary:
• Disconnect all connections.

Maintenance | 7
0870146978_RB_RC0021C_A0001_IM_en 15 / 24
7.1 Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The
intervals given below are desired to be considered as starting values which should be
shortened or extended as appropriate. Particularly harsh applications or heavy duty oper-
ation, such as high dust loads in the environment or in the process gas, other contamina-
tion or ingress of process material, can make it necessary to shorten the maintenance in-
tervals significantly.
Maintenance work Interval
Normal application Harsh application
• Check the oil level, see Oil Level Inspec-
tion [►15].
Daily
• Check the machine for oil leaks - in case of
leaks have the machine repaired (contact
Busch).
In case an inlet filter is installed:
• Check the inlet filter cartridge, replace it if
necessary.
Monthly
• Contact Busch for an inspection.
If required, overhaul the machine.
Every 5 years
* Service interval for synthetic oil, shorten the interval when using mineral oil, contact
Busch Service
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 / 24 0870146978_RB_RC0021C_A0001_IM_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
For oil type and oil capacity see Technical Data [►22] and Oil [►22].
1
4
MAX
MIN
3
2
Busch Oil
Check oil level 1x o-ring part no.:
0486 000 590

Maintenance | 7
0870146978_RB_RC0021C_A0001_IM_en 17 / 24
7.4 Exhaust Filter Change
4x
1
2
10 mm wrench
1x exhaust filter (EF)
1
4x
2
O-ring
10 mm wrench
1x exhaust filter (EF), part no.: 0532 140 155
Busch genuine spare parts
1x flat gasket
part no.: 0480 000 112

8 | Overhaul
18 / 24 0870146978_RB_RC0021C_A0001_IM_en
8 Overhaul
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
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)
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.
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.
9 Decommissioning
• Shut down the machine and lock against inadvertent start up.
• Vent the connected lines to atmospheric pressure.
• Disconnect all connections.
If the machine is going to be stored:
• See Storage [►7].
9.1 Dismantling and Disposal
• Drain the oil.
• Remove the exhaust filters.
• Remove the oil filter.
• Separate special waste from the machine.
• Dispose of special waste in compliance with applicable regulations.
• Dispose of the machine as scrap metal.

Spare Parts | 10
0870146978_RB_RC0021C_A0001_IM_en 19 / 24
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 part kit Description Part no.
Service kit Exhaust filter with O-ring
Exhaust cover plate gasket
Seal ring for oil fill plug
Seal ring for oil drain plug
0992121241
Gasket kit All seals 0990146959
Overhaul kit Wearing parts
Gasket kit
0993146964
If other parts are required:
• Contact your Busch representative for the detailed spare parts list.

11 | Troubleshooting
20 / 24 0870146978_RB_RC0021C_A0001_IM_en
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.
EF ISGB CPL
Problem Possible Cause Remedy
The machine does not start. The motor is not supplied
with the correct voltage.
• Check the power supply.
The motor is defective. • Replace the motor.
The coupling (CPL) is de-
fective.
• 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).
The inlet filter cartridge (op-
tional) is partially clogged.
• Replace the inlet filter
cartridge.
Internal parts are worn or
damaged.
• Repair the machine (con-
tact Busch).
The machine runs very nois-
ily.
Worn coupling (CPL). • Replace the coupling
(CPL).
Stuck vanes. • Repair the machine (con-
tact Busch).
Defective bearings. • Repair the machine (con-
tact Busch).