BUSCH RH 0003 B User manual

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Instruction Manual
ZEBRA
Two-Stage Rotary Vane Vacuum Pumps
RH 0003 B, RH 0010 B, RH 0015 B, RH 0021 B
0870169116/-0003_en / Original instructions / Modifications reserved 04/10/2021

Table of Contents
2 / 28 Instruction Manual ZEBRA RH 0003-0021 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 Gas Ballast Valve ................................................................................................... 5
2.4 Optional Accessories ........................................................................................................ 6
2.4.1 Inlet Filter ..............................................................................................................6
2.4.2 Oil Mist Separator ................................................................................................. 6
2.5 Motor Variants................................................................................................................. 6
3 Transport ..................................................................................................................................7
4 Storage .....................................................................................................................................7
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
5.2.3 Oil Mist Separator (Optional) ................................................................................ 10
5.3 Filling Oil.......................................................................................................................... 10
5.4 Electrical Connection ........................................................................................................ 12
5.4.1 Wiring Diagram Single-Phase Motor ..................................................................... 12
5.4.2 Wiring Diagram Three-Phase Motor...................................................................... 13
6 Commissioning.........................................................................................................................14
6.1 Continuous Operation...................................................................................................... 14
6.2 Conveying Condensable Vapours..................................................................................... 15
7 Maintenance.............................................................................................................................15
7.1 Maintenance Schedule ..................................................................................................... 16
7.2 Oil Change Recommendations ......................................................................................... 17
7.3 Oil Change....................................................................................................................... 18
7.4 Coupling Maintenance ..................................................................................................... 20
8 Overhaul...................................................................................................................................21
9 Decommissioning.....................................................................................................................21
9.1 Dismantling and Disposal ................................................................................................. 21
10 Spare Parts................................................................................................................................22
11 Accessories...............................................................................................................................22
12 Troubleshooting .......................................................................................................................22
13 Technical Data..........................................................................................................................25
14 Oil ............................................................................................................................................25
15 EU Declaration of Conformity...................................................................................................26
16 UK Declaration of Conformity ..................................................................................................27

Safety | 1
Instruction Manual ZEBRA RH 0003-0021 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 ZEBRA RH 0003-0021 B_EN_en
2 Product Description
ODV
DA EB GB OFP OUT OSG ODP
OLI
MTB IN
RH 0010 B
(three-phase motor)
RH 0021 B
RH 0021 B
(single-phase motor)
RH 0010 B
(single-phase motor)
MCOOS OOSDAOUT NP
EB OFP NP
MC
DAMTB
MTB
DA Directional arrow EB Eye bolt
GB Gas ballast valve IN Suction connection
MC Mains connection MTB Motor terminal box
NP Nameplate ODP Oil drain plug
ODV Oil drain valve OFP Oil fill plug
OLI Oil level indicator OOS On/off-switch
OSG Oil sight glass OUT Discharge connection
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 ZEBRA RH 0003-0021 B_EN_en 5 / 28
2.1 Operating Principle
The machine works on the two-stage rotary vane principle.
The oil seals the gaps, lubricates the vanes and takes away compression heat.
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 capable of maintaining ultimate pressure, see Technical Data [►25].
The machine is suitable for continuous operation under certain conditions, see Continu-
ous Operation [►14].
Permitted environmental conditions, see Technical Data [►25].
NOTICE
Chemical compatibility of the process gases with the machine component materials.
Risk of corrosion inside the compression chamber which can reduce performance and
its lifetime!
• Check if the process gases are compatible with those following materials:
- Cast iron
- Steel
- Aluminium
- Fluoroelastomer (FKM/FPM)
• In doubt, please contact your Busch representative.
2.3 Standard Features
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.

2 | Product Description
6 / 28 Instruction Manual ZEBRA RH 0003-0021 B_EN_en
2.4 Optional Accessories
2.4.1 Inlet Filter
The inlet filter protects the machine against dust and other solids in the process gas. The
inlet filter is available with a polyester cartridge.
2.4.2 Oil Mist Separator
To reduce the oil consumption and trap any oil mist, when operating at a high suction
pressure, it is recommended to fit an oil mist separator at the discharge connection
(OUT).
To allow the oil to return to the machine in continuous operation, please comply with
the conditions for Continuous Operation [►14].
2.5 Motor Variants
The Zebra RH 0003-0021 B are equipped with multi-voltages and multi-frequencies
motors (50 Hz/60 Hz).
They can be delivered either with a single-phase or three-phase motor, except for
RH0003B which is only available with a single-phase motor.

Transport | 3
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 7 / 28
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 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.
Machine weight:
see the technical data or the nameplate (NP)
For RH 0010 B and RH 0015 B: For RH 0021 B:
For RH 0003 B:
Due to its light weight (16 kg / 35 lbs), it can be handled with care by hand
• 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 7 ... 40 °C (45 ... 104 °F), less than 85%RH
(relative humidity).

5 | Installation
8 / 28 Instruction Manual ZEBRA RH 0003-0021 B_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.
~10 cm
~3.93 in
~10 cm
~3.93 in
~10 cm
~3.93 in
~10 cm
~3.93 in
• 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 of the motor fan are not covered or ob-
structed and that the cooling air flow is not affected adversely in any other way.
• Make sure that the oil sight glass (OSG) or the oil level indicator (OLI) 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.
• 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 ZEBRA RH 0003-0021 B_EN_en 9 / 28
5.2 Connecting Lines / Pipes
WARNING
Internal pressure higher than 300 hPa (gauge).
Risk of severe injury!
Risk of damage to the machine!
• Make sure that the discharge line is not clogged (either pipe or oil mist separator).
• 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!
• Do not put hand or fingers in the 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 25
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 ZEBRA RH 0003-0021 B_EN_en
Connection size(s):
– ISO-KF 25
– G3/4 (without ISO-KF adapter) for RH 0003 B
– G1 (without ISO-KF adapter) for RH 0010-0021 B
• 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.
5.2.3 Oil Mist Separator (Optional)
The oil mist separator has to be fitted at the discharge connection.
• Remove the ISO-KF adapter.
• Mount the oil mist separator with its seal.
OMS OUT
Connection alternative:
A threaded connection
is possible by
unscrewing the oil mist
separator cap.
OMS 0003 Oil mist separator for RH 0003 B
OMS 0021 Oil mist separator for RH 0010-0021 B
OUT Discharge
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.

Installation | 5
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 11 / 28
For oil type and oil capacity see Technical Data [►25] and Oil [►25].
1
4
MAX
MIN
3
2
2
Busch Oil
2
Check oil level
Oil filling for RH 0003-0015 B:
Check the o-ring
if it is correctly
seated in the groove
MAX
MIN
3
2
2
Busch Oil
1
4
2
Check oil level
Oil filling for RH 0021 B:
Check the o-ring
if it is correctly
seated in the groove

5 | Installation
12 / 28 Instruction Manual ZEBRA RH 0003-0021 B_EN_en
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.
• 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.
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
The motor is equipped with an auto reset thermal protector that turns off the machine at
120 ±5 °C.
If the protector has been activated:
• Solve the problem (see Troubleshooting [►22]).
• Let the motor cool down until a temperature of 78 ±9 °C.
• Restart the machine.
For RH 0003 B:
• Electrically connect the motor according to the following wiring diagram:
Connector type: Quick-connect terminal (#250)
21 3
54 6
L N
For RH 0010-0021 B:
• Electrically connect the motor directly to the mains connection (MC).
Connector type: EN 60320-C13 (AC plug for Europe included)

Installation | 5
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 13 / 28
NOTE
The factory default voltage class is set for 200-240 V use.
If the motor is to be operated with a voltage such as 100-120 V:
• Open the motor terminal box (MTB).
• Change the switch position (see the following illustration).
Voltage class switch for:
RH 0003 B and RH 0021 B
Voltage class switch for:
RH 0010 B and RH 0015 B
200-240 V
100-120 V
200-240 V
100-120 V
5.4.2 Wiring Diagram Three-Phase Motor
• Electrically connect the motor according to the following wiring diagram:
Connector:
– Terminal block (Power supply ► M4 thread; Earth ► M5 thread)
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):

6 | Commissioning
14 / 28 Instruction Manual ZEBRA RH 0003-0021 B_EN_en
6 Commissioning
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.
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].
• Make sure that the installation conditions (see Installation Conditions [►8]) are met.
• Make sure that the gas ballast valve is closed before starting the machine.
• 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 Continuous Operation
NOTICE
Working at a suction pressure higher than 100 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.
If the machine is equipped with an oil mist separator:
• The operating time in continuous operation is not limited below a suction pressure
of 0.4 hPa.
In case of a higher suction pressure:
• The machine must be stopped for at least 5 minutes or operate at a pressure lower
than 0.4 hPa for at least 10 minutes within the maximum operating time (see ta-
ble below).
This operation allows the oil collected in the separator to return to the machine.
The following table gives reference values which may vary depending on the pumping
speed and the operating conditions.
Continuous suction
pressure
Maximum operating time
RH 0003 B
(with OMS 0003)
RH 0010-0021 B
(with OMS 0021)
100 hPa Within 23 hours Within 8 hours
80 hPa Within 25 hours Within 13 hours
53 hPa Within 31 hours Within 25 hours

Maintenance | 7
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 15 / 28
Continuous suction
pressure
Maximum operating time
RH 0003 B
(with OMS 0003)
RH 0010-0021 B
(with OMS 0021)
27 hPa Within 35 hours Within 42 hours
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
• Make sure that the gas ballast valve is open.
Before process:
• Warm up the machine for approximately half an hour.
After process:
• Operate the machine for approximately another half an hour.
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.
• Shut down the machine and lock against inadvertent start up.
• Vent the connected lines to atmospheric pressure.
If necessary:
• Disconnect all connections.

7 | Maintenance
16 / 28 Instruction Manual ZEBRA RH 0003-0021 B_EN_en

Maintenance | 7
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 17 / 28
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 applications 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 level and the colour of the oil.
• Check the machine for oil leaks - in case of leaks have
the machine repaired (contact Busch).
Monthly • Check the inlet screen, clean if necessary.
In case of an inlet filter being installed:
• Check the inlet filter cartridge, replace if
necessary.
After the first 240 hours • Change the oil, see Oil Change [►18].
At least after 2000 hours In case of an oil separator being installed:
• Change the filter cartridge
Between 6 and 12 months • Change the oil, see Oil Change [►18].
The oil change depends on the process application,
refer to the table of Oil Change Recommendations
[►17].
Yearly • Clean the machine from dust and dirt.
• Check the coupling, see Coupling Maintenance
[►20].
Every 5 years • Have a major overhaul on the machine (contact
Busch).
7.2 Oil Change Recommendations
Purpose Oil Change Interval
Vacuum system for study / laboratory, small vacuum
system
Within 6 months to 1 year
Vacuum system for production / vacuum evaporation Within 3 to 6 months
Vacuum valve exhaust system / large vacuum evapo-
ration system
Within 3 months
Metallurgy vacuum system such as thermal treatment,
melting and the like
Within 1 month
High vacuum dry / vacuum impregnation / vacuum
forming / vacuum packing system
Within 1 month
Low vacuum dry / pug mill / food packing system Within 1 week

7 | Maintenance
18 / 28 Instruction Manual ZEBRA RH 0003-0021 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.
2
1
Drain pan
Oil draining for RH 0003-0015 B:
Check the o-ring
if it is correctly
seated in the groove

Maintenance | 7
Instruction Manual ZEBRA RH 0003-0021 B_EN_en 19 / 28
1
2
Drain pan
Oil draining for RH 0021 B:
For oil type and oil capacity see Technical Data [►25] and Oil [►25].
1
4
MAX
MIN
3
2
2
Busch Oil
2
Check oil level
Oil filling for RH 0003-0015 B:
Check the o-ring
if it is correctly
seated in the groove

7 | Maintenance
20 / 28 Instruction Manual ZEBRA RH 0003-0021 B_EN_en
MAX
MIN
3
2
2
Busch Oil
1
4
2
Check oil level
Oil filling for RH 0021 B:
Check the o-ring
if it is correctly
seated in the groove
7.4 Coupling Maintenance
• Disassemble the machine according to the following illustration.
Coupling spider
• Check the coupling spider.
• Change it if necessary.
• Reassemble the machine.