BUSCH MINK ATEX User manual

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MINK ATEX
Claw Compressors
MM 1104 BPE, MM 1144 BPE
MM 1102 BPE, MM 1142 BPE
Instruction Manual
0870141683 | A0001_en-US | Original instructions 4/11/2022

Table of Contents
2 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
Table of Contents
1 Safety..................................................................................................................................................................... 4
2 Product Description............................................................................................................................................. 5
2.1 Operating Principle ............................................................................................................................................. 6
2.2 Intended Use ....................................................................................................................................................... 6
2.3 Design Options .................................................................................................................................................... 7
2.3.1 Gas Tight Version .................................................................................................................................. 7
2.3.2 Aqua Version.......................................................................................................................................... 7
2.4 Accessories........................................................................................................................................................... 8
2.4.1 Temperature Monitoring ..................................................................................................................... 8
2.4.2 Pressure Monitoring............................................................................................................................. 8
2.5 Optional Accessories........................................................................................................................................... 8
2.5.1 Inlet Filter............................................................................................................................................... 8
2.6 Explanation of ATEX Classification .................................................................................................................... 9
2.7 Safety Concept..................................................................................................................................................... 10
2.7.1 ATEX Classifications and Associated Accessories.............................................................................. 10
3 Transport .............................................................................................................................................................. 11
4 Storage .................................................................................................................................................................. 12
5 Installation ........................................................................................................................................................... 13
5.1 Installation Conditions........................................................................................................................................ 13
5.2 Connecting Lines / Pipes .................................................................................................................................... 14
5.2.1 Suction Connection............................................................................................................................... 15
5.2.2 Discharge Connection .......................................................................................................................... 15
5.3 Earth Connection................................................................................................................................................. 15
5.4 Filling Oil............................................................................................................................................................... 16
5.5 Fitting the Coupling ............................................................................................................................................ 17
5.6 Electrical Connection .......................................................................................................................................... 18
5.6.1 Wiring Diagram Three-Phase Motor .................................................................................................. 19
5.7 Electrical Connection of the Monitoring Devices ............................................................................................ 20
5.7.1 Wiring Diagram Resistance Thermometer ........................................................................................ 20
5.7.2 Wiring Diagram Pressure Transmitter ............................................................................................... 21
6 Commissioning..................................................................................................................................................... 22
6.1 Conveying Condensable Vapors........................................................................................................................ 22
7 Maintenance......................................................................................................................................................... 23
7.1 Maintenance Schedule ....................................................................................................................................... 24
7.2 Oil Level Inspection............................................................................................................................................. 24
7.3 Cleaning from Dust and Dirt.............................................................................................................................. 25
7.4 Oil Change............................................................................................................................................................ 26
7.5 Pressure Relief Lines Maintenance (Gas Tight Version Only) ........................................................................ 28
7.6 Coupling Maintenance........................................................................................................................................ 29
7.7 Maintenance Monitoring Devices ..................................................................................................................... 31
7.7.1 Checking Function of the Measurement and Safety Instrumentation........................................... 31
8 Overhaul................................................................................................................................................................ 33
9 Decommissioning................................................................................................................................................. 34
9.1 Dismantling and Disposal .................................................................................................................................. 34
10 Spare Parts............................................................................................................................................................ 35
11 Troubleshooting................................................................................................................................................... 36

Table of Contents
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 3 | 44
12 Technical Data...................................................................................................................................................... 38
13 Oil........................................................................................................................................................................... 39
14 EU Declaration of Conformity............................................................................................................................. 40

1 | Safety
4 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
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, as described in the following chapters and in accordance
with the chapter Intended Use. 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.

Product Description | 2
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 5 | 44
2 Product Description
IN
OUT
OSG ODP
NP
TSA
MTB
PSA
NRV
DA
CAI
CAONP-MOT
ECP
EB
CD
PRL
ECI
IF SV
Description
IN Suction connection OUT Discharge connection
OSG Oil sight glass ODP Oil drain plug
CAI Cooling ait inlet CAO Cooling air outlet
NRV Non-return-valve (integrated) EB Eye bolt
IF Inlet filter (optional) DA Directional arrow
NP Nameplate MTB Motor terminal box
NP-MOT Motor nameplate TSA Terminal box with transmitter
PSA Pressure transmitter ECP Equipotential bonding rail
ECI Inlet filter earth connection CD Condensate drain (optional)
PRL Pressure relief line SV Safety valve
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘compressor’.

2 | Product Description
6 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.
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 and non-toxic gases.
It is necessary to check and ensure that the process media is compatible with the pump materials
and that the explosion protection will not be compromised e.g. by corrosion or chemical reaction. If
necessary, contact your local Busch representative.
Depending on the equipment, the machine is intended for suction of explosive gases according to
the data given on the nameplate of the machine (NP), see Explanation of ATEX Classification [➔9].
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 potentially explosive environment according to the
data given on the nameplate of the motor and the nameplate of the machine (NP), see Explanation of
ATEX Classification [➔9].
The machine is designed for indoor installation, in case of outdoor installation, ask your Busch
representative in order to take specific precautions.
The machine is suitable for continuous operation.

Product Description | 2
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 7 | 44
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.
If the machine needs to be maintained after shutdown:
●Provide an additional manual or automatic operated non-return valve in the suction and
discharge line.
Permitted environmental conditions, see Technical Data [➔38].
2.3 Design Options
The design options described in the following chapters might be combined.
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 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
Requirements for a proper functioning:
Ambient pressure The gas tight machine requires an ambient pressure at the gas inlet
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 1.5
hPa l/s (mbar l/s) at a discharge pressure of 2 bar (g). 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 Installation
Conditions [➔13]).
2.3.2 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.

2 | Product Description
8 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
2.4 Accessories
NOTE
Depending on the ATEX classification of the machine, some of the following accessories may
be mandatory, see ATEX Classifications and Associated Accessories [➔10].
2.4.1 Temperature Monitoring
The temperature transmitter (TSA) is to detect high discharge gas temperatures, see Safety Concept
[➔10].
2.4.2 Pressure Monitoring
The pressure transmitter (PSA) is to detect high inlet pressure.
●See Safety Concept [➔10].
2.5 Optional Accessories
2.5.1 Inlet Filter
The inlet filter (IF) protects the machine against dust and other solids in the process gas. The inlet
filter is available with a paper or polyester cartridge.
The inlet filter (IF) has an additional earth connection (ECI), see Earth Connection [➔15].

Product Description | 2
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 9 | 44
2.6 Explanation of ATEX Classification
The ATEX classification is written on the nameplate of the machine (NP), see below a marking
example:
Inside (i) II 2G / 3D Ex h IIB TX Gb / IIIC 125°C Dc
Outside (o) II 2GD Ex h IIB TY Gb / IIIC TZ Db
1
13
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
21
22
Description
1 Design approved acc. to ATEX Directive 2 Explosion protection inside the
machine
3 Equipment group II (not for mining
application)
4 Equipment category for explosive
gases inside the machine
5 Equipment category for explosive dust
inside the machine
6 Type of protection
7 Explosion group inside the machine 8 Temperature class inside the machine
9 Equipment protection level for gas 10 Dust explosion group inside the
machine
11 Maximum temperature for surfaces in
contact with dust
12 Equipment protection level for dust
13 Explosion protection outside the
machine
14 Equipment group II (not for mining
application)
15 Equipment category for explosive gas
and dust outside the machine
16 Type of protection
17 Explosion group outside the machine 18 Temperature class outside the machine
19 Equipment protection level for gas 20 Dust explosion group outside the
machine
21 Maximum temperature for surfaces in
contact with dust
22 Equipment protection level for dust

2 | Product Description
10 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
2.7 Safety Concept
The safety concept is based on the prevention of sparks and excessive temperatures by means of
various accessories.
The monitoring devices must be integrated into the system control such that operation of the
machine will be inhibited if the safety limit values are exceeded.
Temperature Monitoring
Temperature transmitter (TSA) is to detect high discharge gas temperatures.
The temperature transmitter (TSA) must be integrated into the system control such that operation of
the machine will be inhibited if the temperature exceeds the trip signal.
●See on the nameplate (NP)
Pressure Monitoring
The pressure transmitter (PSA) is to detect high inlet pressure.
To ensure the gas tightness, the pressure transmitter (PSA) must be integrated into the system
control such that operation of the machine will be inhibited if the safety limit range is exceeded.
●-200 … +200 hPa (mbar) (g)
The limit values of each accessory are defined in the wiring diagram chapters, see Electrical
Connection of the Monitoring Devices [➔20].
2.7.1 ATEX Classifications and Associated Accessories
The following table defines the obligatory accessories depending on the ATEX classification.
ATEX
IF TSA PSA ATEX MOT
ATEX
CPL ECP ECI
(i)
(o)
II 2G / 3D Ex h IIB TX Gb / IIIC T125°C Dc
II 2G Ex h IIB TX Gb
E
(i)
(o)
II 2G / 3D Ex h IIB TX Gb / IIIC T125°C Dc
No ATEX Zone
C
(i)
(o)
II 2G Ex h IIB TX Gb
II 2G Ex h IIB TX Gb
D
(i)
(o)
II 2G Ex h IIB TX Gb
No ATEX zone
B
(i)
(o)
II 3D Ex h IIIC 125°C Dc
No ATEX zone
AX O O - - - X
(i)
(o) Outside
Inside
(i)
(o)
II 2G / 3D Ex h IIB TX Gb / IIIC T125°C Dc
II 2GD Ex h IIB TX Gb / IIIC T135°C Db
G
(i)
(o)
II 2G Ex h IIB TX Gb
II 2GD Ex h IIB TX Gb / IIIC T135°C Db
F
- X X - - - -
X X X - - X -
-XXXXX -
XXXXXX-
-XXXXX -
XXXXXX-
X: Necessary; (X): Recommended; O: Option; -: Not necessary
Description
IF Inlet filter MOT Motor
TSA Resistance thermometer PSA Pressure transmitter
ECP Machine earth connection ECI Inlet filter earth connection
CPL Coupling

Transport | 3
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 11 | 44
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 [➔38] or the
nameplate (NP).
●Make sure that the eyebolt(s) (EB) is/are in faultless condition, fully screwed in and tightened 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
12 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
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 1104-1142 BP ATEX_EN_en 13 | 44
5 Installation
5.1 Installation Conditions
WARNING
The installation conditions are not respected in an ATEX environment.
Risk of severe injury!
Risk of explosion!
●Take care that the installation conditions are met.
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

5 | Installation
14 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
Other values may apply after Busch approval
●Make sure that the environment of the machine complies with the ATEX classification of the
machine according to the data given on the nameplate of the motor and the nameplate of the
machine (NP).
●Make sure that the ambient conditions comply with the Technical Data [➔38].
●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 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.
●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 [➔24].
●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.
●Make sure that the monitoring devices are correctly connected and integrated into a control
system such that operation of the machine will be inhibited if the safety limit values are exceeded,
see Electrical Connection of the Monitoring Devices [➔20].
If additional electrical components not included in scope of delivery should be added:
●Make sure that they have a better or equal ATEX classification than that of the machine, see the
ATEX marking on the nameplate (NP).
For classification type "B" and "C"
(see ATEX Classifications and Associated Accessories [➔10]):
●Make sure that the installation space or location is ventilated enough in order to prevent the
formation of an explosive area.
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.

Installation | 5
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 15 | 44
●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 ATEX inlet filter (5micron or less) upstream from the machine.
Connection size(s):
– G1 1/4 - without inlet filter (IF)
– G2 1/2 - with inlet filter (IF)
Depending on the specific configuration ordered, other connection dimensions may apply.
●Make sure that the gas is drawn without obstruction.
5.2.2 Discharge Connection
Connection size(s):
– G1 1/4
Depending on the specific configuration ordered, other connection dimensions may apply.
5.3 Earth Connection
In order to prevent the machine from creating an electrostatic charge:
●Connect the earth connection of the machine (ECP)
If an inlet filter (IF) being installed:

5 | Installation
16 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
●Connect the earth connection of the inlet filter (ECI) in addition to the earth connection of the
machine.
1
2
Description
1 Inlet filter earth connection (ECI) 2 Ground to earth
5.4 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 [➔38] and Oil [➔39].

Installation | 5
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 17 | 44
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.
5.5 Fitting the Coupling
1 2 3
4
Description
1 Coupling hub (machine side) 2 Coupling spider
3 Coupling hub (motor side) 4 Set screw; max. admissible torque: 10
Nm
In case of a machine delivery without motor:

5 | Installation
18 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
●Make sure that the ATEX marking of the coupling corresponds to the ATEX classification of the
machine.
●Fit the second coupling hub on the motor shaft (separately delivered).
●Axially adjust the sleeve in such a way until value "E" (or “L”) is reached.
●When the coupling adjustment is done, lock the coupling hub by tightening the radial screw.
●Mount the motor on the machine by including the coupling spider.
For further coupling information, go to www.ktr.com and download the instruction manual of the
ROTEX® coupling.
English German French
Instruction Manual - English Instruction Manual - German Instruction Manual - French
5.6 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 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.
●Make sure that the motor of the machine will not be affected by electric or electromagnetic
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 and temperature switches!
●The wiring diagrams given below are typical. Check the inside of the terminal box for motor and
temperature switches connection instructions/diagrams.

Installation | 5
Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en 19 | 44
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.
5.6.1 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
20 | 44 Instruction Manual MINK MM 1104-1142 BP ATEX_EN_en
Delta connection, multi-voltage motor with 12
pins (middle voltage):
4
4
4
5.7 Electrical Connection of the Monitoring Devices
NOTE
In order to prevent potential nuisance alarms, Busch allows that the control system is
configured with a time delay of 2 seconds.
NOTE
The accessories below are considered as standard.
If other specific components should be used, refer to the instruction manual of the accessory
in question.
WARNING
If the monitoring sensors are not used.
Risk of explosion!
●Always use the mandatory monitoring sensors.
5.7.1 Wiring Diagram Resistance Thermometer
Version with temperature monitoring (TSA):
●Execute the interface for the temperature measuring system in the plant control system
according to the safety concept [➔10] and the manufacturer's instructions. Trip switch
temperature shown on the nameplate (NP) of the machine.
PT100 (stainless steel): 0651 141 747
WIKA Alexander Wiegand SE & Co. KG
Reference: TR40 Pt100/B/3
Transmitter: 0645 139 055
Endress+Hauser SE + Co. KG
Reference: TMT 181-B
Ignition protection type b1
According EN ISO 80079-37
Maintenance procedure:
Yearly: Calibration and function check
1 = + ; 2 = - ; 3 = White ; 5 = Red ; 6 = Red