Mark MSU 11 User manual
Mark
Oil-injected screw compressors
MSU 11, MSU 15, MSU 20
Instruction book
Mark
Oil-injected screw compressors
MSU 11, MSU 15, MSU 20
Instruction book
Original instructions
Copyright notice
Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and
drawings.
This instruction book is valid for CE, non-CE as well as UKCA labelled machines. It
meets the requirements for instructions specified by the applicable European directives
or UK statutory instruments as identified in the Declaration of Conformity.
May 2023
No. 2920 7201 41
www.mark-compressors.com
Table of contents
1 Safety precautions..........................................................................................................6
1.1 Safety icons................................................................................................................................6
1.2 General safety precautions.................................................................................................... 6
1.3 Safety precautions during installation................................................................................ 7
1.4 Safety precautions during operation.................................................................................... 8
1.5 Safety precautions during maintenance or repair.............................................................. 9
1.6 Dismantling and disposal........................................................................................................ 11
2 General description......................................................................................................12
2.1 Introduction............................................................................................................................. 12
2.2 Air flow..................................................................................................................................... 14
2.3 Oil system..................................................................................................................................15
2.4 Cooling system.........................................................................................................................15
2.5 Regulating system................................................................................................................... 16
2.6 Control panel ......................................................................................................................... 17
2.7 Electrical system.................................................................................................................... 17
2.8 Protection of the compressor............................................................................................. 19
3 Controller.......................................................................................................................21
3.1 Controller functions.............................................................................................................21
3.2 Control panel.......................................................................................................................... 24
3.3 Icons used................................................................................................................................. 25
3.4 Main screen...............................................................................................................................27
3.5 Warning..................................................................................................................................... 27
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3.6 Shutdown.................................................................................................................................. 28
3.7 Service warning....................................................................................................................... 31
3.8 Remote control....................................................................................................................... 31
3.9 Scrolling through screens...................................................................................................32
3.10 Calling up/ modifying pressure band settings................................................................. 32
3.11 Calling up running hours.......................................................................................................33
3.12 Calling up Software release.................................................................................................34
3.13 Calling up Bluetooth pairing/ discovery mode................................................................... 35
3.14 Advanced menu......................................................................................................................... 36
3.15 Service mode.............................................................................................................................36
3.16 Screen test...............................................................................................................................36
3.17 Calling up factory reset........................................................................................................37
3.18 Connectivity-Smartphone App............................................................................................... 37
4 Installation.....................................................................................................................41
4.1 Installation proposal............................................................................................................. 41
4.2 Dimension drawings................................................................................................................. 44
4.3 Electrical connections ......................................................................................................... 45
4.4 Pictographs.............................................................................................................................. 49
5 Operating instructions................................................................................................. 51
5.1 Initial start-up..........................................................................................................................51
5.2 Starting.....................................................................................................................................54
5.3 Stopping.....................................................................................................................................56
5.4 Taking out of operation..........................................................................................................57
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2920 7201 41 3
6 Maintenance..................................................................................................................58
6.1 Preventive maintenance schedule.........................................................................................58
6.2 Drive motor ..............................................................................................................................60
6.3 Oil specifications..................................................................................................................... 60
6.4 Oil, filter and separator change ......................................................................................... 60
6.5 C/G filter change.....................................................................................................................62
6.6 Storage after installation.................................................................................................... 64
6.7 Service kits............................................................................................................................... 64
7 Adjustments and servicing procedures..................................................................... 66
7.1 Air filter....................................................................................................................................66
7.2 Coolers..................................................................................................................................... 67
7.3 Safety valve .............................................................................................................................67
7.4 Belt set exchange and tensioning ........................................................................................69
8 Problem solving............................................................................................................72
9 Technical data............................................................................................................... 74
9.1 Electric cable size...................................................................................................................74
9.2 Settings for overload relay and fuses...............................................................................75
9.3 Reference conditions and limitations.................................................................................. 75
9.4 Compressor data..................................................................................................................... 76
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10 Instructions for use...................................................................................................... 78
11 Guidelines for inspection.............................................................................................79
12 Pressure equipment directives................................................................................... 80
13 Declaration of conformity............................................................................................ 81
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2920 7201 41 5
1 Safety precautions
1.1 Safety icons
Danger: Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
Warning: Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
Notice: Indicates a potential situation which, if not avoided, might result in property damage
or in an undesirable result or state.
Note: Indicates important information.
1.2 General safety precautions
• The operator must employ safe working practices and observe all related work safety
requirements and regulations.
• If any of the following statements does not comply with the applicable legislation, the stricter of
the two shall apply.
• Installation, operation, maintenance and repair work must only be performed by authorized,
trained, specialized personnel. The personnel should apply safe working practices by use of
personal protection equipment, appropriate tools and defined procedures.
• The compressor is not considered capable of producing air of breathing quality. For air of
breathing quality, the compressed air must be adequately purified according to the applicable
legislation and standards.
• Before any maintenance, repair work, adjustment or any other non-routine checks, switch the
controller in service mode (see section Service mode), stop the compressor, press the
emergency stop button, switch off the voltage and depressurize the compressor. In addition, the
power isolating switch must be opened and locked. The process of locking, tagging and trying
to turn on the equipment to confirm it cannot operate is called Lock Out, Tag Out (LOTO).
Danger: If the machine is equipped with an automatic restart after voltage failure
function and if this function is active, be aware that the machine will restart automatically
when the power is restored if it was running when the power was interrupted!
• Never play with compressed air. Do not apply the air to your skin or direct an air stream at
people. Never use the air to clean dirt from your clothes. When using the air to clean
equipment, do so with extreme caution and wear eye protection.
• The owner is responsible for maintaining the unit in safe operating condition. Parts and
accessories shall be replaced if unsuitable for safe operation.
• It is not allowed to walk or stand on the unit or on its components.
• If compressed air is used in the food industry and more specifically for direct food contact, it is
recommended, for optimal safety, to use certified Class 0 compressors in combination with
appropriate filtration depending on the application. Please contact your customer center for
advice on specific filtration.
• The service switch should only be operated by a trained service specialist from the
manufacturer.
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6 2920 7201 41
Safety precautions for the connectivity module
It is important to follow all regulations regarding the use of radio equipment, in particular regarding
the possibility of radio frequency (RF) interference. Please follow the safety advice given below
carefully.
• Respect restrictions on the use of radio equipment in fuel depots, chemical plants or other
explosive environments.
• Avoid operation close to inadequately protected personal medical devices such as hearing aids
and pacemakers. Consult the manufacturers of the medical device to determine if it is
adequately protected.
• Avoid operation close to other electronic equipment which may also cause interference if the
equipment is inadequately protected. Observe any warning signs and manufacturer
recommendations.
• Respect a distance from the human body of at least 20 cm (8 inch) during operation.
1.3 Safety precautions during installation
Warning: All responsibility for any damage or injury resulting from neglecting these
precautions, or non-observance of the normal caution and care required for installation,
operation, maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
• The machine must only be lifted using suitable equipment in accordance with the applicable
safety regulations. Loose or pivoting parts must be securely fastened before lifting. It is strictly
forbidden to dwell or stay in the risk zone under a lifted load. Lifting acceleration and
deceleration must be kept within safe limits. Wear a safety helmet when working in the area of
overhead or lifting equipment.
• The unit is designed for indoor use. If the unit is installed outdoors, special precautions must be
taken. Consult your supplier.
• Place the machine where the ambient air is as cool and clean as possible. If necessary, install a
suction duct. Never obstruct the air inlet. Care must be taken to minimize the entry of moisture
at the inlet air.
• Any blanking flanges, plugs, caps and desiccant bags must be removed before connecting the
pipes.
• Air hoses must be of correct size and suitable for the working pressure. Never use frayed,
damaged or worn hoses. Distribution pipes and connections must be of the correct size and
suitable for the working pressure.
• The aspirated air must be free of flammable fumes, vapors and particles, e.g. paint solvents,
that can lead to internal fire or explosion.
• Arrange the air intake so that loose clothing worn by people cannot be drawn in.
• Ensure that the discharge pipe from the compressor to the after-cooler or air net is free to
expand under heat and that it is not in contact with or close to flammable materials.
• No external force may be exerted on the air outlet valve; the connected pipe must be free of
strain.
• If remote control is installed, the machine must bear a clear sign stating: DANGER: This
machine is remotely controlled and may start without warning.
The operator has to make sure that the machine is stopped and depressurized and that the
electrical isolating switch is open, locked and labelled with a temporary warning before any
maintenance or repair. As a further safeguard, persons switching on or off remotely controlled
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2920 7201 41 7
machines shall take adequate precautions to ensure that there is no one checking or working
on the machine. To this end, a suitable notice shall be affixed to the start equipment.
• Air-cooled machines must be installed in such a way that an adequate flow of cooling air is
available and that the exhausted air does not recirculate to the compressor air inlet or cooling
air inlet.
• The electrical connections must correspond to the applicable codes. The machines must be
earthed and protected against short circuits by fuses in all phases. A lockable power isolating
switch must be installed near the compressor.
• On machines with automatic start/stop system or if the automatic restart function after voltage
failure is activated, a sign stating "This machine may start without warning" must be affixed
near the instrument panel.
• In multiple compressor systems, manual valves must be installed to isolate each compressor.
Non-return valves (check valves) must not be relied upon for isolating pressure systems.
• Never remove or tamper with the safety devices, guards or insulation fitted on the machine.
Every pressure vessel or auxiliary installed outside the machine to contain air above
atmospheric pressure must be protected by a pressure relieving device or devices as required.
• Piping or other parts with a temperature in excess of 70˚C (158˚F) and which may be
accidentally touched by personnel in normal operation must be guarded or insulated. Other
high temperature piping must be clearly marked.
• If the ground is not level or can be subject to variable inclination, consult the manufacturer.
• In an installation with multiple compressors, the outlet piping must be installed in such a way
that condensate cannot flow back into the compressor. See section Installation proposal.
Note: Also consult the following safety precautions: Safety precautions during operation and
Safety precautions during maintenance or repair.
These precautions apply to machinery processing or consuming air or inert gas. Processing
of any other gas requires additional safety precautions typical to the application which are not
included herein.
Some precautions are general and cover several machine types and equipment; hence some
statements may not apply to your machine.
1.4 Safety precautions during operation
Warning: All responsibility for any damage or injury resulting from neglecting these
precautions, or non-observance of the normal caution and care required for installation,
operation, maintenance and repair, even if not expressly stated, will be disclaimed by the
manufacturer.
• Never touch any piping or components of the machine during operation.
• Use only the correct type and size of hose end fittings and connections. When blowing through
a hose or air line, ensure that the open end is held securely. A free end will whip and may
cause injury. Make sure that a hose is fully depressurized before disconnecting it.
• Persons switching on remotely controlled machines shall take adequate precautions to ensure
that there is no one checking or working on the machine. To this end, a suitable notice shall be
affixed to the remote start equipment.
• Never operate the machine when there is a possibility of taking in flammable or toxic fumes,
vapors or particles.
• Never operate the machine below or in excess of its limit ratings.
• Keep all bodywork doors shut during operation. The doors may be opened for short periods
only, e.g. to carry out routine checks. Wear ear and eye protection when opening a door.
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