BUSCH MINK MM 1402 AV User manual

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Instruction Manual
MINK
Claw Vacuum Pumps
MM 1402 AV
MM 1502 AV
0870156906/B0004_en / Original instructions / Modifications reserved 13/12/2021

Table of Contents
2 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Operating Principle .......................................................................................................... 5
2.2 Application....................................................................................................................... 5
2.3 Design Options ................................................................................................................ 5
2.3.1 Gas Tight Version ..................................................................................................6
2.3.2 Aqua Version......................................................................................................... 6
2.4 Start Controls ................................................................................................................... 6
2.5 Optional Accessories ........................................................................................................ 7
2.5.1 Inlet Filter .............................................................................................................. 7
2.5.2 Vacuum Relief Valve ............................................................................................. 7
2.5.3 Condensate Drain.................................................................................................. 7
3 Transport ..................................................................................................................................8
4 Storage .....................................................................................................................................8
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 ........................................................................................................ 12
5.4.1 Wiring Diagram Three-Phase Motor...................................................................... 12
6 Commissioning.........................................................................................................................14
6.1 Conveying Condensable Vapours..................................................................................... 14
7 Maintenance.............................................................................................................................15
7.1 Maintenance Schedule ..................................................................................................... 16
7.2 Oil Level Inspection.......................................................................................................... 16
7.3 Cleaning from Dust and Dirt ............................................................................................ 17
7.4 Oil Change....................................................................................................................... 17
7.5 Pressure Relief Lines Maintenance (Gas Tight Version Only)............................................. 19
8 Overhaul...................................................................................................................................21
9 Decommissioning.....................................................................................................................21
9.1 Dismantling and Disposal ................................................................................................. 21
10 Spare Parts................................................................................................................................22
11 Troubleshooting .......................................................................................................................22
12 Technical Data..........................................................................................................................24
13 Oil ............................................................................................................................................24
14 EU Declaration of Conformity...................................................................................................25
15 UK Declaration of Conformity ..................................................................................................26

Safety | 1
Instruction Manual MINK MM 1402-1502 AV_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 meth-
ods. Nevertheless, residual risks may remain. This instruction manual highlights potential
hazards where appropriate. Safety notes and warning messages are tagged with one of
the keywords DANGER, WARNING, CAUTION, NOTICE and NOTE as follows:
DANGER
... indicates an imminent dangerous situation that will result in death or serious injuries if
not prevented.
WARNING
... indicates a potentially dangerous situation that could result in death or serious injuries.
CAUTION
... indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
... indicates a potentially dangerous situation that could result in damage to property.
NOTE
... indicates helpful tips and recommendations, as well as information for efficient and
trouble-free operation.

2 | Product Description
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2 Product Description
CAO IN OUT
ODPOSG
CAI
EB
MTBNP
CD
Aqua versionGas tight version
DA
PRL
NRV
IN Suction connection ODP Oil drain plug
OUT Discharge connection CAI Cooling air inlet
OSG Oil sight glass CAO Cooling air outlet
NP Nameplate EB Eye bolt
CD Condensate drain (optional) MTB Motor terminal box
NRV Non-return valve (integrated) PRL Pressure relief line
DA Directional arrow
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 1402-1502 AV_EN_en 5 / 28
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.
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 [►24].
The machine is suitable for continuous operation.
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:
• Provide an additional manual or automatic operated non-return valve in the suction line.
Permitted environmental conditions, see Technical Data [►24].
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 1402 AV0
Aqua version A MM 1402 AVA
Gastight version G MM 1402 AVG

2 | Product Description
6 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
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 remains 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 pres-
sure relief lines.
Ambient environment Closed air cooling systems are not suitable and therefore pro-
hibited.
• 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.
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.

Product Description | 2
Instruction Manual MINK MM 1402-1502 AV_EN_en 7 / 28
2.5 Optional Accessories
2.5.1 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.
2.5.2 Vacuum Relief Valve
The ultimate pressure is limited by a vacuum relief valve. The vacuum relief valve is ad-
justed ex-works to the minimum permitted ultimate pressure (see nameplate).
2.5.3 Condensate Drain
The condensate drain (CD) uses to drain the accumulated fluids.

3 | Transport
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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.
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:
• 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.

Installation | 5
Instruction Manual MINK MM 1402-1502 AV_EN_en 9 / 28
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
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 [►24].
• Make sure that the environmental conditions comply with the protection class of the
motor and the electrical instruments.
• Make sure that the installation space or location is vented such that sufficient cooling
of the machine is provided.
• Make sure that cooling air inlets and outlets are not covered or obstructed and that
the cooling air flow is not affected adversely in any other way.
• Make sure that the oil sight glass (OSG) remains easily visible.
• Make sure that enough space remains for maintenance work.

5 | Installation
10 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
• 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 [►16].
• 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
The connection lines can build up an electrostatic charge.
Risk of severe injury!
Risk of explosion!
• The connection lines must be made out of conductive material or provisions must be
made against creating an electrostatic charge.
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
Connection size(s):
– G3
Depending on the specific order, other connection dimensions may apply.
5.2.2 Discharge Connection
Connection size(s):
– R2
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.

Installation | 5
Instruction Manual MINK MM 1402-1502 AV_EN_en 11 / 28
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 [►24] and Oil [►24].
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 in-
dicates a leak and the machine requires repair.

5 | Installation
12 / 28 Instruction Manual MINK MM 1402-1502 AV_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.
• 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.
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.

Installation | 5
Instruction Manual MINK MM 1402-1502 AV_EN_en 13 / 28
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

6 | Commissioning
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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 pe-
riods:
• 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 [►24].
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.

Maintenance | 7
Instruction Manual MINK MM 1402-1502 AV_EN_en 15 / 28
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.

7 | Maintenance
16 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
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 ex-
tended 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
Monthly In case of an inlet filter being installed:
• Check the inlet filter cartridge, replace if neces-
sary.
Every 3 months • Check the oil level, see Oil Level Inspection [►16].
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 tightness:
• Replace sealing rings (contact Busch).
Gas tight version only
Every 10000 hours, at the lat-
est after 2 years
• Check that pressure lines are not clogged, see Pres-
sure Relief Lines Maintenance (Gas Tight Version
Only) [►19].
Every 20000 hours • Change the oil.
The change interval of 20000 operating hours is valid
for Busch approved oils only. The change interval de-
pends very much on the operating conditions. Border-
line operation may reduce the change interval down to
approximately 5000 operating hours. Other oils may re-
duce the change interval.
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 in-
dicates a leak and the machine requires repair.
• Fill up if necessary, see Oil Filling [►11].

Maintenance | 7
Instruction Manual MINK MM 1402-1502 AV_EN_en 17 / 28
7.3 Cleaning from Dust and Dirt
Clean the ventilation grilles,
cooling fins and inlet screen (IS)
4 mm hex key

7 | Maintenance
18 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
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.
Drain pan
Cleaning cloth
For oil type and oil capacity see Technical Data [►24] and Oil [►24].
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 in-
dicates a leak and the machine requires repair.

Maintenance | 7
Instruction Manual MINK MM 1402-1502 AV_EN_en 19 / 28
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 il-
lustrations.
Blow into the pipe
with compressed air
Remove pipes Unscrew nuts

7 | Maintenance
20 / 28 Instruction Manual MINK MM 1402-1502 AV_EN_en
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).
Connect pressurised air to
the pressure relief lines
Unscrew plugs
Screw plugs
Remove the upper cover
Remount the upper cover
max. 0.2 bar (overpressure)
Tighten nuts
Remount pipes