BUSCH RA 0025 F User manual

O2
Instruction Manual
R 5 Oxygen
Oil-Lubricated Rotary Vane Vacuum Pumps
RA 0025 F, RA 0040 F, RA 0063 F, RA 0100 F
0870143290/B0002_en / Original instructions / Modifications reserved 27/02/2019
Busch Produktions GmbH
Schauinslandstraße 1, 79689 Maulburg
Germany

Table of Contents
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Table of Contents
1 Safety........................................................................................................................... 3
2 Product Description ..................................................................................................... 4
2.1 Operating Principle............................................................................................... 5
2.2 Application ........................................................................................................... 5
2.3 Start Controls .......................................................................................................5
2.4 Optional Accessories............................................................................................. 5
2.4.1 Gas Ballast Valve........................................................................................5
2.4.2 Inlet Filter ..................................................................................................5
2.4.3 Additional Oil Separator.............................................................................6
2.4.4 Level Switch...............................................................................................6
3 Transport ..................................................................................................................... 6
4 Storage......................................................................................................................... 7
5 Installation................................................................................................................... 7
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 ............................................................................................10
5.4.1 Wiring Diagram Single-Phase Motor..........................................................11
5.4.2 Wiring Diagram Three-Phase Motor ..........................................................11
5.5 Electrical Connection of the Monitoring Devices ................................................... 12
5.5.1 Wiring Diagram Level Switch (Optional)....................................................12
6 Commissioning............................................................................................................ 12
6.1 Version with Oil Return Valve............................................................................... 13
6.2 Conveying Condensable Vapours ......................................................................... 14
7 Maintenance................................................................................................................ 14
7.1 Maintenance Schedule.......................................................................................... 16
7.2 Oil Level Inspection .............................................................................................. 17
7.3 Oil Colour Inspection............................................................................................ 17
7.4 Oil and Oil Filter Change ......................................................................................18
7.5 Exhaust Filter Change ...........................................................................................20
8 Overhaul...................................................................................................................... 21
9 Decommissioning ........................................................................................................ 21
9.1 Dismantling and Disposal...................................................................................... 21
10 Spare Parts................................................................................................................... 22
11 Troubleshooting........................................................................................................... 23
12 Technical Data ............................................................................................................. 25
13 Oil ............................................................................................................................... 25
14 EU Declaration of Conformity ...................................................................................... 26

Safety | 1
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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
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2 Product Description
DA NPMTB EF IN OUT
OSG ODP OFPGBEB
OSOF
AF
AOS*
LES
* Optional for RA 0025/0040 F
IN Suction connection MTB Motor terminal box
OUT Discharge connection DA Directional arrow
OFP Oil fill plug EF Exhaust filter
OSG Oil sight glass NP Nameplate
ODP Oil drain plug OF Oil filter
EB Eye bolt AF Axial fan
GB Gas ballast valve OS Oil separator
AOS Additional oil separator LES Lead seal
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum
pump’.

Product Description | 2
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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.
The oil filter cleans the circulating oil.
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.
The oxygen version is especially designed for conveying gases with an increased oxygen
content (volume content greater than 21% and up to 100%).
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 [►25].
The machine is suitable for continuous operation.
Permitted environmental conditions, see Technical Data [►25].
2.3 Start Controls
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
The machine can be optionally equipped with a starter unit or a variable-frequency drive.
2.4 Optional Accessories
2.4.1 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 [►25].
2.4.2 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.

3 | Transport
6 / 28 0870143290_RA0025-0100F_O2_B0002_IM_en
2.4.3 Additional Oil Separator
It allows to trap and recover at the machine exhaust the smallest oil particles.
The recovered oil is automatically re-injected in the machine.
It is recommended to use it when the machine working pressure is higher than 100 hPa
(mbar).
This accessory is supplied in option for RA 0025/0040 F and in standard for RA
0063/0100 F.
2.4.4 Level Switch
The level switch monitors the oil level in the oil separator (OS).
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.
• Make sure that the eyebolt (EB) is in faultless condition, fully screwed in and tightened
by hand.
Machine weight:
see the technical data or the nameplate

Storage | 4
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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
previously shown.
• 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
WARNING
Lack of oxygen regulation knowledge.
Risk of fire!
• Installation, commissioning and maintenance must only be carried out by qualified
personnel who are informed about the applicable safety regulations and trained in the
handling of oxygen.
• Accident prevention regulations or methods must imperatively be complied with.
Seek further information:
- European Industrial Gases Association “EIGA” www.eiga.eu (EIGA SAG NL 79/04).
- Berufsgenossenschaft Rohstoffe und chemische Industrie "BG RCI” www.bgrci.de
(Merkblatt M 034 Sauerstoff).

5 | Installation
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5.1 Installation Conditions
WARNING
The machine is not absolutely gas tight.
Risk of fire!
• The installation area must be aired in such a way so as to prevent unacceptable levels
of oxygen.
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
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►25].
• 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 [►17].
• 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
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5.2 Connecting Lines / Pipes
• Remove all protective caps 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:
– G1 1/4
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:
– G1 1/4
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 / 28 0870143290_RA0025-0100F_O2_B0002_IM_en
5.3 Filling Oil
WARNING
Fill the machine with wrong oil type.
Risk of fire!
• Only use oil approved by Busch and suitable for oxygen application, see Oil [►25].
At delivery, the machine is already filled with specific oil "Busch YLC 250 B" which is
suitable for oxygen application.
A lead seal is applied on the oil fill plug (OFP) and the oil drain plug (ODP) in order to
prevent wrong material from being filled in.
Lead seal must only be removed and applied by authorised and trained personnel, seek
advice from your Busch representative.
NOTICE
Remove lead seal without Busch approval.
Loss of Busch liability!
• Ask your Busch representative before filling or draining the 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.
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.

Installation | 5
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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.
5.4.1 Wiring Diagram Single-Phase Motor
4 5 6
5.4.2 Wiring Diagram Three-Phase Motor
Delta connection (low voltage): Star connection (high voltage):
Double star connection, multi-voltage
motor with 9 pins (low voltage):
Star connection, multi-voltage motor
with 9 pins (high voltage):
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.

6 | Commissioning
12 / 28 0870143290_RA0025-0100F_O2_B0002_IM_en
• 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.
5.5 Electrical Connection of the Monitoring Devices
NOTE
In order to prevent potential nuisance alarms, Busch recommends that the control system
is configured with a time delay of at least 20 seconds.
5.5.1 Wiring Diagram Level Switch (Optional)
Part no.: 0652 131 363
Electrical data:
U = max. 250 V
Imax = 1.0 A
P = 20 W
IP 65
Switching element function:
Reed-contact
Contact: 2x Normally open
2
1
S1
4
3
S2
124
3
1 = White ; 2 = White ;
3 = Brown ; 4 = Brown
Switch point:
S1trip ► pin 1 + 2 ► max. level
S2trip ► pin 3 + 4 ► min. level
6 Commissioning
WARNING
Lack of oxygen regulation knowledge.
Risk of fire!
• Installation, commissioning and maintenance must only be carried out by qualified
personnel who are informed about the applicable safety regulations and trained in the
handling of oxygen.
• Accident prevention regulations or methods must imperatively be complied with.
Seek further information:
- European Industrial Gases Association “EIGA” www.eiga.eu (EIGA SAG NL 79/04).
- Berufsgenossenschaft Rohstoffe und chemische Industrie "BG RCI” www.bgrci.de
(Merkblatt M 034 Sauerstoff).

Commissioning | 6
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WARNING
Machine contaminated with organic material.
Risk of fire!
If there is a suspicion that the machine or the oil is contaminated with organic material:
• The machine must be removed from service and cleaned by specialists (contact your
Busch representative).
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 [►25].
• 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 10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
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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* and
open the gas ballast
valve** (GB)
• Warm up the machine
• Open the isolation
valve and perform the
process
• Close the isolation
valve
END
START
30 minutes
• Close the gas ballast
valve
** may be considered as optional on certain products
7 Maintenance
WARNING
Lack of oxygen regulation knowledge.
Risk of fire!
• Installation, commissioning and maintenance must only be carried out by qualified
personnel who are informed about the applicable safety regulations and trained in the
handling of oxygen.
• Accident prevention regulations or methods must imperatively be complied with.
Seek further information:
- European Industrial Gases Association “EIGA” www.eiga.eu (EIGA SAG NL 79/04).
- Berufsgenossenschaft Rohstoffe und chemische Industrie "BG RCI” www.bgrci.de
(Merkblatt M 034 Sauerstoff).
WARNING
Machine contaminated with organic material.
Risk of fire!
If there is a suspicion that the machine or the oil is contaminated with organic material:
• The machine must be removed from service and cleaned by specialists (contact your
Busch representative).
WARNING
Use of non-Busch genuine spare parts.
Risk of fire!
• Only use Busch spare parts approved by Busch and suitable for oxygen application.

Maintenance | 7
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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.
• Make sure to have an authorisation from Busch to perform any maintenance tasks.
• Shut down the machine and lock against inadvertent start up.
• Vent the connected lines to atmospheric pressure.
If necessary:
• Disconnect all connections.

7 | Maintenance
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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 [►17].
Daily
• Check the machine for oil leaks - in case of
leaks have the machine repaired (contact
Busch).
In case of an inlet filter being installed:
• Check the inlet filter cartridge, replace if
necessary.
Monthly
• Change the exhaust filters (EF). Max. after 4000
hours, at the latest
after 1 year
Max. after 2000
hours, at the latest
after 6 months
• Clean the machine from dust and dirt.
In case of a gas ballast valve (GB) being in-
stalled:
• Clean the gas ballast valve.
Every 6 months
• Contact Busch for an inspection.
If required, overhaul the machine.
Every 5 years

Maintenance | 7
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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].
7.3 Oil Colour Inspection
WARNING
Oil “YLC 250 B” contaminated chemically or by foreign bodies.
Risk of explosion!
If the oil becomes dark:
• Contact your Busch representative without delay.
• Make sure that the oil is either light or transparent.
If the oil becomes dark or looks different from the initial colour:
• Change the oil immediately, see Oil and Oil Filter Change [►18].
You can consult your Busch representative in order to find out why this colour change
has occurred.

7 | Maintenance
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7.4 Oil and Oil Filter Change
WARNING
Fill the machine with wrong oil type.
Risk of fire!
• Only use oil approved by Busch and suitable for oxygen application, see Oil [►25].
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.
A lead seal is applied on the oil fill plug (OFP) and the oil drain plug (ODP) in order to
prevent wrong material from being filled in.
Lead seal must only be removed and applied by authorised and trained personnel, seek
advice from your Busch representative.
NOTICE
Remove lead seal without Busch approval.
Loss of Busch liability!
• Ask your Busch representative before filling or draining the oil.
1
2
3
Drain pan
1x o-ring, part no.:
0486 000 504
Remove lead seal
(if authorized)

Maintenance | 7
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USED
1
USED
2
NEW
3
0531 000 002
Busch genuine spare parts
1x oil filter (OF), part no.: 0531 128 428
Oil filter wrench
For oil type and oil capacity see Technical Data [►25] and Oil [►25].
1
4
MAX
MIN
3
2
Busch Oil
5
Check oil level
1x o-ring, part no.:
0486 000 633 Reapply
lead seal

7 | Maintenance
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7.5 Exhaust Filter Change
1
2
10 mm wrench
RA 0025/0040 F: 1x exhaust filter (EF)
RA 0063/0100 F: 2x exhaust filter (EF)
O-ring
1
2
10 mm wrench
part no.: 0480 000 112
part no.: 0532 141 267
RA 0025/0040 F: 1x exhaust filter (EF)
RA 0063/0100 F: 2x exhaust filter (EF)
Busch genuine spare parts
RA 0025/0040 F: 1x flat gasket
RA 0063/0100 F: 2x flat gasket