BUSCH R 5 series User manual

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R5
Rotary Vane Vacuum Pumps
RA 0010 C, RA 0016 C,
RC 0010 C, RC 0016 C
Instruction Manual
0870146950 | B0003_en-US | Original instructions 7/28/2022

Table of Contents
2 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
Table of Contents
1 Safety..................................................................................................................................................................... 3
2 Product Description............................................................................................................................................. 4
2.1 Operating Principle ............................................................................................................................................. 5
2.2 Intended Use ....................................................................................................................................................... 5
2.3 Start Controls....................................................................................................................................................... 6
2.4 Optional Accessories........................................................................................................................................... 6
2.4.1 Gas Ballast Valve ................................................................................................................................... 6
2.4.2 Inlet Filter............................................................................................................................................... 6
3 Transport .............................................................................................................................................................. 7
4 Storage .................................................................................................................................................................. 9
5 Installation ........................................................................................................................................................... 10
5.1 Installation Conditions........................................................................................................................................ 10
5.2 Connecting Lines / Pipes .................................................................................................................................... 11
5.2.1 Suction Connection............................................................................................................................... 11
5.2.2 Discharge Connection .......................................................................................................................... 11
5.3 Filling Oil............................................................................................................................................................... 12
6 Electrical Connection........................................................................................................................................... 13
6.1 Machine delivered without Control Box or Variable Speed Drive (VSD)....................................................... 13
6.2 Wiring Diagram Three-Phase Motor................................................................................................................. 14
7 Commissioning..................................................................................................................................................... 15
7.1 Version with Oil Return Valve ............................................................................................................................ 15
7.2 Conveying Condensable Vapors........................................................................................................................ 15
8 Maintenance......................................................................................................................................................... 17
8.1 Maintenance Schedule ....................................................................................................................................... 18
8.2 Oil Level Inspection............................................................................................................................................. 18
8.3 Oil Change............................................................................................................................................................ 19
8.4 Exhaust Filter Change......................................................................................................................................... 20
9 Overhaul................................................................................................................................................................ 22
10 Decommissioning................................................................................................................................................. 23
10.1 Dismantling and Disposal .................................................................................................................................. 23
11 Spare Parts............................................................................................................................................................ 24
12 Troubleshooting................................................................................................................................................... 25
13 Technical Data...................................................................................................................................................... 27
14 Oil........................................................................................................................................................................... 29
15 EU Declaration of Conformity............................................................................................................................. 30
16 UK Declaration of Conformity ............................................................................................................................ 31

Safety | 1
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 3 | 32
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. Never-
theless, residual risks may remain, as described in the following chapters and in accordance with the
chapter Intended Use [➔5]. This instruction manual highlights potential hazards where appropri-
ate. 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 trou-
ble-free operation.

2 | Product Description
4 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
2 Product Description
TL
DA MTB
OS
NP EF IN
OUT
GB
OFP
ODP OSG
Description
DA Directional arrow MTB Motor terminal box
OFP Oil fill plug NP Nameplate
EF Exhaust filter OUT Discharge connection
IN Suction connection OS Oil separator
ODP Oil drain plug OSG Oil sight glass
TL Transport lug GB Gas ballast valve (Version with gas ballast
valve)
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 RA_RC 0010-0016 C_EN_en 5 | 32
NOTE
Product origin
The serial number on the nameplate (NP) determines the manufacturing plant.
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.
In order to avoid reverse rotation after switching off, the machine is equipped with a non-return
valve (NRV).
In order to avoid solids from entering, the machine is equipped with an inlet screen (IS).
Exhaust filters separate the oil from the discharged gas.
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 non-ex-
plosive 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 rep-
resentative in order to take specific precautions.
The machine is capable of maintaining ultimate pressure, see Technical Data [➔27].
Depending on the version, the operating time of the machine can be limited as followed:

2 | Product Description
6 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
Machine version Operating time
RA 0010/0016 C
Ultimate pressure =
pabs: 0.5 hPa (mbar)*
The machine is suitable for intermittent operation only.
After maximal 2 hours of continuous operation, the machine
must be shut down for at least 15 minutes.
RA 0010/0016 C**
Ultimate pressure =
pabs: 2 hPa (mbar)*
The machine is suitable for continuous operation within a
range of 2 to 100 hPa abs.
RC 0010/0016 C
Ultimate pressure =
pabs: 20 hPa (mbar)*
The machine is suitable for continuous operation.
* Refer to the nameplate (NP) to identify the machine version.
** Version with oil return line to B-cover.
Permitted environmental conditions, see Technical Data [➔27].
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 equipped with a soft-starter.
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 vapor inside the vacuum pump.
The gas ballast valve has an influence on the ultimate pressure of the machine, see Technical Data
[➔27].
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.

Transport | 3
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 7 | 32
3 Transport
WARNING
Suspended load.
Risk of severe injury!
●Do not walk, stand or work under suspended loads.
CAUTION
Handle the machine by hand.
Risk of injury!
●Do not lift by hand a machine heavier than 20 kg.
●Follow all safety provisions in order to prevent an accident.
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 ingress into
the cylinder. Starting the machine with excessive quantities of oil in the cylinder will immedi-
ately break the vanes and ruin the machine!
●Drain the oil prior to every transport or always horizontally transport the machine.

3 | Transport
8 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
●To find out the weight of the machine, refer to the chapter Technical Data [➔27] or the name-
plate (NP).
1
2
Description
1 Lifting with a sling: make sure the ma-
chine is properly fastened to the lifting
sling.
2 Lifting with the transport lug (TL)
●Check the machine for transport damage.
If the machine is secured to a base plate:
●Remove the machine from the base plate.

Storage | 4
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 9 | 32
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
10 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_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 [➔27].
●Make sure that the environmental conditions comply with the protection class of the motor and
the electrical elements.
●Make sure that the installation space or location is protected from weather and lightning.
●Make sure that the installation space or location is vented such that sufficient cooling of the ma-
chine 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 [➔18].
●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
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 11 | 32
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 effi-
ciency. 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):
– G3/4
Depending on the specific configuration ordered, 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.
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 the
discharge line or use it as a pressurized air source.
Connection size(s):
– Without connection. The discharged gas is released to the ambient of the machine.
Depending on the specific configuration ordered, other connection dimensions may apply.
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 sep-
arator or a siphon with a drain cock, so that no liquids can flow back into the machine.

5 | Installation
12 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_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 [➔27] and Oil [➔29].
1
Description
1 1x o-ring part no.: 0486 000 590

Electrical Connection | 6
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 13 | 32
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 dis-
turbance 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 net-
work system, if necessary provide further interference suppression (EMC of the machine, see EU
Declaration of Conformity [➔30] or UK Declaration of Conformity [➔31]).
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.
●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 to
protect persons in case of isolation default.
●Busch recommends installing a type B residual protective device suitable for the electrical in-
stallation.
●Provide a lockable disconnect switch or an emergency stop switch on the power line so that the
machine is completely secured in case of an emergency situation.

6 | Electrical Connection
14 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
●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.
6.2 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.
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):
Double star connection, multi-voltage motor
with 9 pins (low voltage):
Star connection, multi-voltage motor with 9
pins (high voltage):

Commissioning | 7
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 15 | 32
7 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 [➔12].
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 [➔10]) are met.
●Switch on the machine.
●Make sure that the maximum permissible number of starts does not exceed 30 starts per hour.
Those starts should be spread within the hour.
●Make sure that the operating conditions comply with the Technical Data [➔27].
●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 trouble-
shooting work.
7.1 Version with Oil Return Valve
During operation oil accumulates at the bottom of the upper chamber of the oil separator, which
cannot flow down into the bottom chamber, as long as the machine runs.
After 2 hours of continuous operation near ultimate pressure (in case of a higher operating pressure
in a shorter period):
●Shut down the machine for at least 15 minutes.
➔The oil can run down from the upper chamber of the oil separator into the bottom chamber
7.2 Conveying Condensable Vapors
Water vapor within the gas flow is tolerated within certain limits. The conveyance of other vapors
shall be agreed upon with Busch.
If condensable vapors are to be conveyed:
START

7 | Commissioning
16 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
●Close the isolation valve* and open the gas ballast valve** (GB)
●Warm up the machine
●Wait 30 minutes
●Open the isolation valve* and perform the process
●Close the isolation valve*
●Wait 30 minutes
●Close the gas ballast valve** (GB)
END
* not included in the scope of delivery
** may be considered as optional on certain products
●Make sure that the gas ballast valve (optional) is open.

Maintenance | 8
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 17 | 32
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.
●Vent the connected lines to atmospheric pressure.
If necessary:
●Disconnect all connections.

8 | Maintenance
18 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
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 appropri-
ate. Particularly harsh applications or heavy duty operation, such as high dust loads in the environ-
ment or in the process gas, other contamination or ingress of process material, can make it neces-
sary to shorten the maintenance intervals significantly.
Maintenance work Interval
Normal application Harsh application
●Check the oil level, see Oil Level Inspection
[➔18].
Daily
●Check the machine for oil leaks - in case of
leaks have the machine repaired (contact Bus-
ch).
In case of an inlet filter being installed:
●Check the inlet filter cartridge, replace if neces-
sary.
Monthly
●Change the oil*, the oil filter* (OF) and the ex-
haust 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 installed:
●Clean the gas ballast valve.
If the machine is equipped with an air-oil heat ex-
changer (AHE):
●Check and/or clean the air-oil heat exchanger.
Every 6 months
●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
8.2 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 [➔12].

Maintenance | 8
Instruction Manual R5 RA_RC 0010-0016 C_EN_en 19 | 32
8.3 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
Description
1 1x o-ring, part no.: 0486 000 505
For oil type and oil capacity see Technical Data [➔27] and Oil [➔29].

8 | Maintenance
20 | 32 Instruction Manual R5 RA_RC 0010-0016 C_EN_en
1
Description
1 1x o-ring part no.: 0486 000 590
8.4 Exhaust Filter Change
1
2
Description
1 10 mm wrench 2 1x exhaust filter (EF)