BUSCH Mink MM 1252 AV User manual

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MINK
Claw Vacuum Pumps
MM 1324 AV, MM 1202 AV
MM 1252 AV, MM 1322 AV
Instruction Manual
0870133276 | B0007_en-US | Original instructions 2/23/2023

Table of Contents
2 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
Table of Contents
1 Safety ..................................................................................................................................................................... 3
2 Product Description ............................................................................................................................................. 4
2.1 Operating Principle............................................................................................................................................. 5
2.2 Intended Use ....................................................................................................................................................... 5
2.3 Design Options.................................................................................................................................................... 6
2.3.1 Aqua Version......................................................................................................................................... 6
2.3.2 Gas Tight Version.................................................................................................................................. 7
2.3.3 Light Chemical Version ........................................................................................................................ 8
2.4 Start Controls....................................................................................................................................................... 9
2.5 Standard Features............................................................................................................................................... 9
2.5.1 Vacuum Relief Valve ............................................................................................................................. 9
2.6 Optional Accessories........................................................................................................................................... 9
2.6.1 Inlet Filter .............................................................................................................................................. 9
2.6.2 Condensate Drain................................................................................................................................. 9
3 Transport............................................................................................................................................................... 10
4 Storage................................................................................................................................................................... 11
5 Installation............................................................................................................................................................ 12
5.1 Installation Conditions ....................................................................................................................................... 12
5.2 Connecting Lines / Pipes .................................................................................................................................... 13
5.2.1 Suction Connection .............................................................................................................................. 13
5.2.2 Discharge Connection.......................................................................................................................... 14
5.2.3 Barrier Gas System Connection.......................................................................................................... 14
5.3 Filling Oil............................................................................................................................................................... 15
6 Electrical Connection ........................................................................................................................................... 16
6.1 Machine delivered without Control Box or Variable Speed Drive (VSD) ...................................................... 17
6.2 Wiring Diagram Three-Phase Motor................................................................................................................. 18
7 Commissioning ..................................................................................................................................................... 19
7.1 Conveying Condensable Vapors........................................................................................................................ 19
8 Maintenance ......................................................................................................................................................... 20
8.1 Maintenance Schedule ....................................................................................................................................... 21
8.2 Oil Level Inspection............................................................................................................................................. 21
8.3 Cleaning from Dust and Dirt.............................................................................................................................. 22
8.4 Oil Change............................................................................................................................................................ 23
8.5 Pressure Relief Lines Maintenance................................................................................................................... 24
8.6 Barrier Gas System Maintenance...................................................................................................................... 26
9 Overhaul ................................................................................................................................................................ 28
10 Decommissioning ................................................................................................................................................. 29
10.1 Dismantling and Disposal .................................................................................................................................. 29
11 Spare Parts ............................................................................................................................................................ 30
12 Troubleshooting ................................................................................................................................................... 31
13 Technical Data ...................................................................................................................................................... 33
14 Oil ........................................................................................................................................................................... 35
15 EU Declaration of Conformity ............................................................................................................................. 36
16 UK Declaration of Conformity............................................................................................................................. 37

Safety | 1
Instruction Manual MINK MM 1202-1322 AV_EN_en 3 | 40
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 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
2 Product Description
21
IN OUT
OSG
ODP
NP MTB NRVDA CAI
CAO EB
CD PRL
3
BGS
OFP
Description
IN Suction connection OUT Discharge connection
OFP Oil fill plug (below the cover) ODP Oil drain plug
CAI Cooling air inlet CAO Cooling air outlet
OSG Oil sight glass NRV Non-return-valve (integrated)
EB Eye bolt DA Directional arrow
MTB Motor terminal box NP Nameplate
1 Aqua version CD Condensate drain (optional)
2 Gas tight version PRL Pressure relief line (optional)
3 Light chemical version BGS Barrier gas system (optional)
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 MINK MM 1202-1322 AV_EN_en 5 | 40
NOTE
Product origin
The serial number on the nameplate (NP) determines the manufacturing plant.
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.
In order to avoid solids from entering, the machine is equipped with an inlet screen (IS).
In order to avoid reverse rotation after switching off, the machine is equipped with a non-return
valve (NRV).
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 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 mini-
mum allowed ultimate pressure will not be underrun.

2 | Product Description
6 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
The machine is suitable for continuous operation up to a certain suction pressure indicated 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 machine is limited to 20 minutes at ultimate pressure:
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: After operation at ultimate pressure, the machine must cool down by operating be-
tween range of 200 to 1013 hPa (mbar) for atleast same amount of time as at ultimate pressure.
For example: 20 min operation at ultimate pressure = 20 minutes of cool down time.
Note: The non-return valve (NRV) shouldn't be used as a non-return or shut off valve for the System.
The non-return valve is only to protect the pump.
If the machine needs to be maintained after shutdown:
●Provide an additional manual or automatic operated non-return valve in the suction line.
Permitted environmental conditions, see Technical Data [➔33].
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 1322 A V0
Aqua version A MM 1322 A VA
ATEX version * E MM 1322 A VE
Gas tight version G MM 1322 A VG
Light chemical version ** F MM 1322 A VF
* ATEX-version machines have a separate dedicated ‘ATEX Instruction Manual’ document.
** The light chemical version is only available for the machine size MM 1322 A VF.
2.3.1 Aqua Version
The Aqua version is a design option for conveying condensable vapors (water).
This machine is specifically equipped with:
– corrosion protection coating.
– optional condensate drain (CD) in the internal silencer.

Product Description | 2
Instruction Manual MINK MM 1202-1322 AV_EN_en 7 | 40
2.3.2 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 remains in the ma-
chine and does not escape to the environment.
It is a very important feature for applications where gases potentially dangerous to human 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:
Description
Ambient pressure The gas tight machine requires an ambient pressure at the gas dis-
charge during the whole operation range of +/- 200 hPa (mbar), un-
less 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 in-
crease 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 Installation
Conditions [➔12]).

2 | Product Description
8 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
2.3.3 Light Chemical 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 light chemical version is a design option to handle mild non-corrosive & non-toxic process va-
pors from chemical and pharmaceutical industries. The process gas remains in the machine and
doesn’t escape to the environment, similar to gas tight version. As the machine is a dry claw vacuum
pump and is not made to handle liquids, condensation inside the machine should be avoided. The
light chemical version is also available in combination with aqua version for conveying condensable
vapors.
If you're not sure if this light chemical version is suitable for your application, please contact a Busch
representative.
It is a very important feature for applications where gases potentially dangerous to human 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:
●barrier gas lines
●collecting lines
●shaft seal rings
●o-ring
●gasket
Requirements for a proper functioning:
Description
Ambient pressure The light chemical machine requires an ambient pressure at the gas
discharge during the whole operation range of +/- 200 hPa (mbar), un-
less 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 in-
crease up to prohibited pressure values at the gas inlet/outlet due to
used shaft seal rings or clogged barrier gas lines.
Ambient environment Closed air cooling systems are not suitable and therefore prohibited.
●Make sure that the machine is sufficiently vented (see Installation
Conditions [➔12]).

Product Description | 2
Instruction Manual MINK MM 1202-1322 AV_EN_en 9 | 40
2.4 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.
2.5 Standard Features
2.5.1 Vacuum Relief Valve
The ultimate pressure is limited by a vacuum relief valve (VRE). The vacuum relief valve is adjusted
ex-works to the minimum permitted ultimate pressure shown on the nameplate (NP).
2.6 Optional Accessories
2.6.1 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.
2.6.2 Condensate Drain
The condensate drain (CD) uses to drain the accumulated fluids.

3 | Transport
10 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
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.
●To find out the weight of the machine, refer to the chapter Technical Data [➔33] or the name-
plate (NP).
●Make sure that the eye bolt(s) (EB) is/are in faultless condition, fully screwed in and tightened by
hand.
1
Description
1 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:
●Remove the machine from the base plate.

Storage | 4
Instruction Manual MINK MM 1202-1322 AV_EN_en 11 | 40
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
12 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
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.
~1 m
~1 m ~1 m
~1 m
●Make sure that the environment of the machine is not potentially explosive.
●Make sure that the ambient conditions comply with the Technical Data [➔33].
●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.

Installation | 5
Instruction Manual MINK MM 1202-1322 AV_EN_en 13 | 40
●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 deviation of 1° in any
direction is acceptable.
●Check the oil level, see Oil Level Inspection [➔21].
●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 connection of the machine; if neces-
sary 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):
– G2” – without inlet filter (IF)
– G2” ½ - with inlet filter (IF)
Depending on the specific configuration ordered, other connection dimensions may apply.

5 | Installation
14 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
5.2.2 Discharge Connection
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):
– R1 for MM 1324 AV, MM 1202 AV, MM 1252 AV
– R1 1/4 for MM 1322 AV
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.
5.2.3 Barrier Gas System Connection
PRBGC MAN
Description
BGC Barrier gas connection PR Pressure reducer
MAN Manometer
●Connect the barrier gas connection (BGC) to the gas supply.
Connection size:
– G1/4, ISO 228-1
●Make sure that the gas complies with the following requirements:
Gas type Dry nitrogen or air
Gas temperature °C 0 ... 50
Maximum gas pressure before barrier gas
connection (BGC)
bar (g) 1 bar (g)
Recommended pressure setting after the
pressure reducer (PR)
mbar (g) max. 200

Installation | 5
Instruction Manual MINK MM 1202-1322 AV_EN_en 15 | 40
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 [➔33] and Oil [➔35].
1
Description
1 4 mm hex key
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.

6 | Electrical Connection
16 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
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 provided by the customer on his 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 electromagnetic 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 [➔36] or UK Declaration of Conformity [➔37]).

Electrical Connection | 6
Instruction Manual MINK MM 1202-1322 AV_EN_en 17 | 40
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 a defective insulation.
●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.
●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.
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 con-
nection instructions/diagrams.

6 | Electrical Connection
18 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
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):
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
Delta connection, multi-voltage motor
with 12 pins (middle voltage):
4
4
4

Commissioning | 7
Instruction Manual MINK MM 1202-1322 AV_EN_en 19 | 40
7 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 people are present in the vicinity of a machine that is not insulated from noise for extended peri-
ods of time:
●Make sure to wear hearing protection.
●Make sure that the Installation Conditions [➔12] are met.
●Start 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 [➔33].
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 Conveying Condensable Vapors
The Aqua version is a design option for conveying condensable vapors (water).
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:
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.

8 | Maintenance
20 | 40 Instruction Manual MINK MM 1202-1322 AV_EN_en
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.