BUSCH Mink MM 1324 AV User manual

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Instruction Manual
Mink
Claw Vacuum Pumps
MM 1324 AV, MM 1202 AV, MM 1252 AV, MM 1322 AV
0870133276/A0005_en / Original instructions / Modifications reserved 22/06/2021

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 Design Options................................................................................................................ 7
2.3.1 Gas Tight Version................................................................................................. 7
2.3.2 Aqua Version........................................................................................................ 7
2.4 Optional Accessories ...................................................................................................... 8
2.4.1 Inlet Filter.............................................................................................................. 8
2.4.2 Vacuum Relief Valve ............................................................................................ 8
2.4.3 Condensate Drain ................................................................................................ 8
3 Transport ................................................................................................................................8
4 Storage....................................................................................................................................9
5 Installation ..............................................................................................................................9
5.1 Installation Conditions ..................................................................................................... 9
5.2 Connecting Lines / Pipes ................................................................................................ 10
5.2.1 Suction Connection .............................................................................................. 10
5.2.2 Discharge Connection .......................................................................................... 10
5.3 Filling Oil ......................................................................................................................... 11
5.4 Electrical Connection ...................................................................................................... 11
5.4.1 Wiring Diagram Three-Phase Motor..................................................................... 12
6 Commissioning ......................................................................................................................15
6.1 Conveying Condensable Vapours................................................................................... 15
7 Maintenance ...........................................................................................................................16
7.1 Maintenance Schedule.................................................................................................... 16
7.2 Oil Level Inspection......................................................................................................... 17
7.3 Cleaning from Dust and Dirt ............................................................................................ 18
7.4 Oil Change ...................................................................................................................... 18
7.5 Pressure Relief Lines Maintenance (Gas Tight Version Only)........................................ 19
8 Overhaul..................................................................................................................................22
9 Decommissioning ..................................................................................................................22
9.1 Dismantling and Disposal................................................................................................ 22
10 Spare Parts .............................................................................................................................23
11 Troubleshooting.....................................................................................................................24
12 Technical Data........................................................................................................................26
13 Oil ............................................................................................................................................26
14 EU Declaration of Conformity...............................................................................................27

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 any-
thing 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 po-
tential 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 injur-
ies.
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
ODPOSG
Aqua version
CD
OUT
CAO CAIIN
MTB
NP EB DA
PRL
Gas tight version
IN Suction connection ODP Oil drain plug
OUT Discharge connection CAI Cooling air inlet
OSG Oil sight glass CAO Cooling air outlet
NP Nameplate CD Condensate drain
MTB Motor terminal box EB Eye bolt
DA Directional arrow PRL Pressure relief line
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
0870133276_MM1324_1322AV_A0005_IM_en_MD 5 / 28
2.1 Operating Principle
The machine works on the claw principle.
The MINK is fully air-cooled thanks to an integrated fan in the drive unit.
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 not capable of maintaining ultimate pressure.
– The minimum allowed ultimate pressure is to be read from the nameplate of
the machine.
– By means of process control and/or vacuum relief valves it must be made sure
that the minimum allowed ultimate pressure will not be underrun.
The machine is suitable for continuous operation up to a certain suction pressure in-
dicated below:
Machine type Suction pressure limitation for continuous operation
MM 1202 AV 200 hPa (mbar) abs.
MM 1252 AV
MM 1322 AV
MM 1324 AV 60 hPa (mbar) abs. = ultimate pressure
The operating time of the following machines is limited to 20 minutes at ultimate pres-
sure:
Machine type Suction pressure
MM 1202 AV 100 hPa (mbar) abs. = ultimate pressure
MM 1252 AV
MM 1322 AV 150 hPa (mbar) abs. = ultimate pressure
Cooling time:
The machine must cool for at least the same time as the ultimate pressure operation,
at a suction pressure range of 200 to 1000 hPa (mbar).
For example: 20 min of operation = 20 min of cooling time
In order to avoid reverse rotation after switching off, the machine is equipped with a
non-return valve (NRV).
Note: The non-return valve (NRV) is no reliable means to prevent suction and shall
not be used as a non-return valve or shut-off valve for the system.
In case the machine shall be maintained after shutdown:

2 | Product Description
6 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
• Provide an additional manual or automatic operated non-return valve in the suction
line.
Permitted environmental conditions, see Technical Data [►26].

Product Description | 2
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2.3 Design Options
The design options described in the following chapters might be combined.
Please refer to the nameplate (NP) to identify the corresponding design option of your
machine.
Design option Codification Example
Standard (no design option) 0 MM 1252 AV0
Gas tight version G MM 1252 AVG
Aqua version A MM 1252 AVA
2.3.1 Gas Tight Version
WARNING
Media potentially dangerous.
Risk of poisoning!
Risk of infection!
• Wear appropriate personal protective equipment in case of high concentration of
the medium in the ambient atmosphere of the machine.
The gas tight version is a design option for applications where the process gas re-
mains in the machine and does not escape to the environment.
It is a very important feature for applications where gases potentially dangerous to hu-
man health are not allowed and the concentration of the process gas must not exceed
the admissible values of the ambient atmosphere of the machine.
This machine is specifically equipped with:
– pressure relief lines
– collecting lines
– shaft seal rings.
Requirements for a proper functioning:
Ambient pressure The gas tight machine requires an ambient pressure at the
gas discharge during the whole operation range of +/- 200
hPa (mbar), unless otherwise specified on the nameplate.
Leakage rate The machine is not absolutely gas tight.
The leakage rate of the machine described in this manual is
of 0.1 hPa l/s (mbar l/s) at a suction pressure of 250 mbar. It
can considerably increase up to prohibited pressure values
at the gas inlet/outlet due to used shaft seal rings or clogged
pressure relief lines.
Ambient environment Closed air cooling systems are not suitable and therefore
prohibited.
• Make sure that the machine is sufficiently vented (see In-
stallation Conditions [►9]).
2.3.2 Aqua Version
The Aqua version is a design option for conveying condensable vapours (water).
This machine is specifically equipped with:
– corrosion protection coating
– optional condensate drain (CD) in the internal silencer.

3 | Transport
8 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
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 paper or polyester cartridge.
2.4.2 Vacuum Relief Valve
The ultimate pressure is limited by a vacuum relief valve. The vacuum relief valve is
adjusted ex-works to the minimum permitted ultimate pressure (see nameplate).
2.4.3 Condensate Drain
The condensate drain (CD) uses to drain the accumulated fluids.
3 Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.
WARNING
Lifting the machine using the motor eye bolt.
Risk of severe injury!
• Do not lift the machine using the eye bolt fitted to the motor. Only lift the machine as
shown.
• Make sure that the eyebolt(s) (EB) is/are in faultless condition, fully screwed in and
tightened by hand.
Mink
S
C
H
B
U
Machine weight:
see the technical data or the nameplate (NP)
Use both eye bolts, in case
a second eye bolt is mounted!
• Check the machine for transport damage.
If the machine is secured to a base plate:

Storage | 4
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• 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
5.1 Installation Conditions
WARNING
Gas tight version:
The machine is not absolutely gas tight, possible leakages of dangerous media.
Risk of poisoning!
Risk of infection!
• Make sure that the ambient atmosphere of the machine is sufficiently ventilated.
Closed air cooling systems are not suitable and therefore prohibited.
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.
Mink
S
C
H
B
U
~1 m
~1 m ~1 m
~1 m
Other values may apply after Busch approval
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►26].

5 | Installation
10 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
• 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 cool-
ing 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.
5.2 Connecting Lines / Pipes
WARNING
Rotating Parts.
Risk of severe injury!
• Do not operate the machine without suction / discharge connection installed.
• 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
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):
– G2
Depending on the specific order, other connection dimensions may apply.
5.2.2 Discharge Connection
Connection size(s):
– R1 for MM 1324 AV, MM 1202 AV, MM 1252 AV
– R1 1/4 for MM 1322 AV

Installation | 5
0870133276_MM1324_1322AV_A0005_IM_en_MD 11 / 28
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
liquid separator or a siphon with a drain cock, so that no liquids can flow back into
the machine.
5.3 Filling Oil
NOTICE
Use of an inappropriate oil.
Risk of premature failure!
Loss of efficiency!
• Only use an oil type which has previously been approved and recommended by
Busch.
For oil type and oil capacity see Technical Data [►26] and Oil [►26].
S
C
H
Mink
B
U
MAX
MIN
1
23
BuschOil
4
5
6
4 mm hex key
Check oil level
The oil level should stay constant over the lifetime of the oil. If the level does fall, this
indicates a leak and the machine requires repair.

5 | Installation
12 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
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.
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.

Installation | 5
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5.4.1 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):
Double star connection, multi-voltage
motor with 12 pins (low voltage):
4
4
4
Star connection, multi-voltage motor
with 12 pins (high voltage):
4
4
4

5 | Installation
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Delta connection, multi-voltage motor
with 12 pins (middle voltage):
4
4
4

Commissioning | 6
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6 Commissioning
NOTICE
Lubricating a dry running machine (compression chamber).
Risk of damage to the machine!
• Do not lubricate the compression chamber of the machine with oil or grease.
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 [►9]) 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 [►26].
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 Conveying Condensable Vapours
The Aqua version is a design option for conveying condensable vapours (water).
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:
Before process:
• Warm up the machine for approximately half an hour.
After process:
• Operate the machine for approximately another half an hour.
• Regularly drain condensate from the silencer with the drain cock.

7 | Maintenance
16 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
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
0870133276_MM1324_1322AV_A0005_IM_en_MD 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.
Every 3 months • Check the oil level, see Oil Level Inspection
[►17].
Every 6 months • Clean the machine from dust and dirt.
Gas tight version only
Every 5000 hours, at the
latest after 2 years
Depending on the requirements in terms of gas tight-
ness:
• Replace sealing rings (contact Busch).
Gas tight version only
Every 10000 hours, at the
latest after 2 years
• Check that pressure lines are not clogged, see
Pressure Relief Lines Maintenance (Gas Tight Ver-
sion Only) [►19].
Every 6 years • Have a major overhaul on the machine (contact
Busch).
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
The oil level should stay constant over the lifetime of the oil. If the level does fall, this
indicates a leak and the machine requires repair.
• Fill up if necessary, see Oil Filling [►11].

7 | Maintenance
18 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
7.3 Cleaning from Dust and Dirt
Mink
S
C
H
B
U
Clean the ventilation grilles
and cooling fins
4 mm hex key
7.4 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.
Mink
S
C
H
B
U
1
2
3
Drain pan
Cleaning cloth

Maintenance | 7
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For oil type and oil capacity see Technical Data [►26] and Oil [►26].
S
C
H
Mink
B
U
MAX
MIN
1
23
BuschOil
4
5
6
4 mm hex key
Check oil level
The oil level should stay constant over the lifetime of the oil. If the level does fall, this
indicates a leak and the machine requires repair.

7 | Maintenance
20 / 28 0870133276_MM1324_1322AV_A0005_IM_en_MD
7.5 Pressure Relief Lines Maintenance
(Gas Tight Version Only)
WARNING
Media potentially dangerous.
Risk of poisoning!
Risk of infection!
• Wear appropriate personal protective equipment in case of high concentration of
the medium in the ambient atmosphere of the machine.
• Check that pressure relief lines (PRL) are not clogged as described in the following
illustrations.
1
3
2
Blow into the pipe
with compressed air
Remove pipes Unscrew nuts
NOTICE
Pressurised air systems supply too high pressure.
Risk of damage to the machine!
• Adjust the pressurised air to 0.2 bar(g) by means of a pressure regulator.
In case of clogged pressure relief lines:
• Remove the clogging or have the machine repaired (contact Busch).