Atlas Copco GA18 User manual

Atlas Copco
Oil-injected rotary screw compressors
GA 15, GA 18, GA 22, GA 26
Instruction book

Atlas Copco
Oil-injected rotary screw compressors
GA 15, GA 18, GA 22, GA 26
From following serial No. onwards: CAI 782 294
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 as well as non-CE labelled machines. It meets the
requirements for instructions specified by the applicable European directives as
identified in the Declaration of Conformity.
2014 - 11
No. 2920 7140 90
www.atlascopco.com

Table of contents
1 Safety precautions..........................................................................................................7
1.1 SAFETY ICONS................................................................................................................................... 7
1.2 GENERAL SAFETY PRECAUTIONS............................................................................................................7
1.3 SAFETY PRECAUTIONS DURING INSTALLATION...........................................................................................8
1.4 SAFETY PRECAUTIONS DURING OPERATION.............................................................................................. 9
1.5 SAFETY PRECAUTIONS DURING MAINTENANCE OR REPAIR......................................................................... 10
2 Introduction...................................................................................................................12
3 Operation.......................................................................................................................16
4 Electrical system.......................................................................................................... 21
5 Electrical diagrams.......................................................................................................22
6 Air dryer.........................................................................................................................23
7 Elektronikon® controller..............................................................................................24
7.1 ELEKTRONIKON® REGULATOR............................................................................................................. 24
7.2 CONTROL PANEL.............................................................................................................................. 25
7.3 ICONS USED ON THE DISPLAY..............................................................................................................26
7.4 MAIN SCREEN..................................................................................................................................28
7.5 SHUTDOWN WARNING........................................................................................................................29
7.6 SHUTDOWN.....................................................................................................................................29
7.7 SERVICE WARNING............................................................................................................................31
7.8 SCROLLING THROUGH ALL SCREENS.....................................................................................................32
7.9 CALLING UP OUTLET AND DEWPOINT TEMPERATURES...............................................................................36
7.10 DIGITAL INPUTS................................................................................................................................37
7.11 CALLING UP RUNNING HOURS..............................................................................................................38
7.12 CALLING UP MOTOR STARTS............................................................................................................... 39
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7.13 CALLING UP MODULE HOURS...............................................................................................................39
7.14 CALLING UP LOADING HOURS.............................................................................................................. 40
7.15 CALLING UP LOAD RELAY................................................................................................................... 40
7.16 CALLING UP/RESETTING THE SERVICE TIMER ......................................................................................... 41
7.17 SELECTION BETWEEN LOCAL, REMOTE OR LAN CONTROL........................................................................42
7.18 CALLING UP/MODIFYING CAN ADDRESS CONTROL.................................................................................. 42
7.19 CALLING UP/MODIFYING IP, GATEWAY AND SUBNETMASK........................................................................44
7.20 CALLING UP/MODIFYING PRESSURE BAND SETTINGS.................................................................................45
7.21 MODIFYING THE PRESSURE BAND SELECTION......................................................................................... 47
7.22 CALLING UP/MODIFYING SERVICE TIMER SETTINGS...................................................................................47
7.23 CALLING UP/MODIFYING THE UNIT OF TEMPERATURE................................................................................48
7.24 CALLING UP/MODIFYING UNIT OF PRESSURE...........................................................................................48
7.25 ACTIVATING AUTOMATIC RESTART AFTER VOLTAGE FAILURE...................................................................... 48
7.26 SELECTION BETWEEN Y-D OR DOL STARTING......................................................................................49
7.27 CALLING UP MODIFYING LOAD DELAY TIME............................................................................................. 49
7.28 CALLING UP MODIFYING MINIMUM STOP TIME.......................................................................................... 50
7.29 ACTIVATING PASSWORD PROTECTION................................................................................................... 50
7.30 ACTIVATE LOAD/UNLOAD REMOTE PRESSURE SENSING............................................................................. 51
7.31 CALLING UP/MODIFYING PROTECTION SETTINGS...................................................................................... 52
7.32 TEST SCREENS................................................................................................................................ 53
7.33 WEB SERVER.................................................................................................................................. 54
7.34 PROGRAMMABLE SETTINGS.................................................................................................................61
8 Elektronikon® Graphic controller............................................................................... 65
8.1 ELEKTRONIKON® GRAPHIC CONTROLLER...............................................................................................65
8.2 CONTROL PANEL.............................................................................................................................. 67
8.3 ICONS USED.................................................................................................................................... 68
8.4 MAIN SCREEN..................................................................................................................................71
8.5 SHUTDOWN WARNING........................................................................................................................75
8.6 SHUTDOWN.....................................................................................................................................76
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8.7 OTHER WARNINGS............................................................................................................................ 79
8.8 CALLING UP MENUS.......................................................................................................................... 81
8.9 INPUTS MENU...................................................................................................................................82
8.10 OUTPUTS MENU............................................................................................................................... 85
8.11 COUNTERS......................................................................................................................................86
8.12 CONTROL MODE SELECTION................................................................................................................87
8.13 SERVICE MENU................................................................................................................................ 88
8.14 SETPOINT MENU...............................................................................................................................92
8.15 EVENT HISTORY MENU.......................................................................................................................94
8.16 MODIFYING GENERAL SETTINGS...........................................................................................................95
8.17 INFO MENU......................................................................................................................................96
8.18 WEEK TIMER MENU...........................................................................................................................97
8.19 TEST MENU................................................................................................................................... 106
8.20 USER PASSWORD MENU...................................................................................................................107
8.21 WEB SERVER................................................................................................................................ 108
8.22 PROGRAMMABLE SETTINGS...............................................................................................................116
9 Installation...................................................................................................................120
9.1 DIMENSION DRAWINGS.....................................................................................................................120
9.2 INSTALLATION PROPOSAL................................................................................................................. 121
9.3 ELECTRICAL CONNECTIONS...............................................................................................................123
9.4 PICTOGRAPHS............................................................................................................................... 125
10 Operating instructions............................................................................................... 127
10.1 INITIAL START UP............................................................................................................................127
10.2 STARTING .................................................................................................................................... 127
10.3 DURING OPERATION........................................................................................................................128
10.4 STOPPING ....................................................................................................................................131
10.5 TAKING OUT OF OPERATION..............................................................................................................132
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11 Maintenance................................................................................................................133
11.1 PREVENTIVE MAINTENANCE SCHEDULE................................................................................................133
11.2 OIL SPECIFICATIONS........................................................................................................................136
11.3 STORAGE AFTER INSTALLATION......................................................................................................... 137
11.4 SERVICE KITS................................................................................................................................ 137
11.5 DISPOSAL OF USED MATERIAL........................................................................................................... 137
12 Adjustments and servicing procedures................................................................... 139
12.1 DRIVE MOTOR ...............................................................................................................................139
12.2 AIR FILTER....................................................................................................................................139
12.3 OIL AND OIL FILTER CHANGE.............................................................................................................140
12.4 OIL SEPARATOR CHANGE................................................................................................................. 141
12.5 COOLERS..................................................................................................................................... 141
12.6 SAFETY VALVES............................................................................................................................. 142
12.7 DRYER MAINTENANCE INSTRUCTIONS..................................................................................................143
13 Problem solving..........................................................................................................144
14 Technical data.............................................................................................................147
14.1 READINGS ON DISPLAY.................................................................................................................... 147
14.2 ELECTRIC CABLE SIZE AND MAIN FUSES.............................................................................................. 148
14.3 MOTOR OVERLOAD RELAY SETTINGS.................................................................................................. 151
14.4 DRYER SWITCHES...........................................................................................................................152
14.5 REFERENCE CONDITIONS AND LIMITATIONS.......................................................................................... 153
14.6 COMPRESSOR DATA........................................................................................................................153
14.7 TECHNICAL DATA ELEKTRONIKON® CONTROLLER..................................................................................159
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15 Instructions for use.................................................................................................... 161
16 Guidelines for inspection...........................................................................................162
17 Pressure equipment directives................................................................................. 163
18 Declaration of conformity.......................................................................................... 164
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1 Safety precautions
1.1 Safety icons
Explanation
Danger for life
Warning
Important note
1.2 General safety precautions
1. The operator must employ safe working practices and observe all related work safety requirements
and regulations.
2. If any of the following statements does not comply with the applicable legislation, the stricter of the
two shall apply.
3. 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.
4. 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.
5. Before any maintenance, repair work, adjustment or any other non-routine checks:
• Stop the compressor
• Press the emergency stop button
• Switch off the voltage
• Depressurize the compressor
• Lock Out - Tag Out (LOTO):
• Open the power isolating switch and lock it with a personal lock
• Tag the power isolating switch with the name of the service technician.
• On units powered by a frequency converter, wait 10 minutes before starting any electrical repair.
• Never rely on indicator lamps or electrical door locks before maintenance work, always
disconnect and check with measuring device.
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!
6. 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.
7. The owner is responsible for maintaining the unit in safe operating condition. Parts and accessories
shall be replaced if unsuitable for safe operation.
8. It is prohibited to walk or stand on the unit or on its components.
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1.3 Safety precautions during installation
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.
Precautions during installation
1. 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.
2. The unit is designed for indoor use. If the unit is installed outdoors, special precautions must be taken;
consult your supplier.
3. In case the device is a compressor, 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.
4. Any blanking flanges, plugs, caps and desiccant bags must be removed before connecting the pipes.
5. 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.
6. In case the device is a compressor, the aspirated air must be free of flammable fumes, vapors and
particles, e.g. paint solvents, that can lead to internal fire or explosion.
7. In case the device is a compressor, arrange the air intake so that loose clothing worn by people cannot
be drawn in.
8. Ensure that the discharge pipe from the compressor to the aftercooler or air net is free to expand under
heat and that it is not in contact with or close to flammable materials.
9. No external force may be exerted on the air outlet valve; the connected pipe must be free of strain.
10. 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 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. 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.
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16. 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.
17. For water-cooled machines, the cooling water system installed outside the machine has to be
protected by a safety device with set pressure according to the maximum cooling water inlet pressure.
18. If the ground is not level or can be subject to variable inclination, consult the manufacturer.
19. If the device is a dryer and no free extinguishing system is present in the air net close to the dryer,
safety valves must be installed in the vessels of the dryer.
Also consult following safety precautions: Safety precautions during operation and
Safety precautions during maintenance.
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
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.
Precautions during operation
1. Never touch any piping or components of the machine during operation.
2. 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.
3. 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.
4. Never operate the machine when there is a possibility of taking in flammable or toxic fumes, vapors
or particles.
5. Never operate the machine below or in excess of its limit ratings.
6. 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 protectors when opening a door.
On machines without bodywork, wear ear protection in the vicinity of the machine.
7. People staying in environments or rooms where the sound pressure level reaches or exceeds 80 dB(A)
shall wear ear protectors.
8. Periodically check that:
• All guards are in place and securely fastened
• All hoses and/or pipes inside the machine are in good condition, secure and not rubbing
• No leaks occur
• All fasteners are tight
• All electrical leads are secure and in good order
• Safety valves and other pressure relief devices are not obstructed by dirt or paint
• Air outlet valve and air net, i.e. pipes, couplings, manifolds, valves, hoses, etc. are in good
repair, free of wear or abuse
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• Air cooling filters of the electrical cabinet are not clogged
9. If warm cooling air from compressors is used in air heating systems, e.g. to warm up a workroom,
take precautions against air pollution and possible contamination of the breathing air.
10. On water-cooled compressors using open circuit cooling towers, protective measures must be taken to
avoid the growth of harmful bacteria such as Legionella pneumophila bacteria.
11. Do not remove any of, or tamper with, the sound-damping material.
12. Never remove or tamper with the safety devices, guards or insulations fitted on the machine. Every
pressure vessel or auxiliary installed outside the machine to contain air above atmospheric pressure
shall be protected by a pressure relieving device or devices as required.
13. Yearly inspect the air receiver. Minimum wall thickness as specified in the instruction book must be
respected. Local regulations remain applicable if they are more strict.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during maintenance.
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.
1.5 Safety precautions during maintenance or repair
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.
Precautions during maintenance or repair
1. Always use the correct safety equipment (such as safety glasses, gloves, safety shoes, etc.).
2. Use only the correct tools for maintenance and repair work.
3. Use only genuine spare parts for maintenance or repair. The manufacturer will disclaim all damage or
injuries caused by the use of non-genuine spare parts.
4. All maintenance work shall only be undertaken when the machine has cooled down.
5. A warning sign bearing a legend such as "Work in progress; do not start" shall be attached to the
starting equipment.
6. 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.
7. Close the compressor air outlet valve and depressurize the compressor before connecting or
disconnecting a pipe.
8. Before removing any pressurized component, effectively isolate the machine from all sources of
pressure and relieve the entire system of pressure.
9. Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety precautions
against toxic vapors of cleaning liquids.
10. Scrupulously observe cleanliness during maintenance and repair. Keep dirt away by covering the
parts and exposed openings with a clean cloth, paper or tape.
11. Never weld or perform any operation involving heat near the oil system. Oil tanks must be completely
purged, e.g. by steam cleaning, before carrying out such operations. Never weld on, or in any way
modify, pressure vessels.
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12. Whenever there is an indication or any suspicion that an internal part of a machine is overheated, the
machine shall be stopped but no inspection covers shall be opened before sufficient cooling time has
elapsed; this to avoid the risk of spontaneous ignition of the oil vapor when air is admitted.
13. Never use a light source with open flame for inspecting the interior of a machine, pressure vessel, etc.
14. Make sure that no tools, loose parts or rags are left in or on the machine.
15. All regulating and safety devices shall be maintained with due care to ensure that they function
properly. They may not be put out of action.
16. Before clearing the machine for use after maintenance or overhaul, check that operating pressures,
temperatures and time settings are correct. Check that all control and shut-down devices are fitted and
that they function correctly. If removed, check that the coupling guard of the compressor drive shaft
has been reinstalled.
17. Every time the separator element is renewed, examine the discharge pipe and the inside of the oil
separator vessel for carbon deposits; if excessive, the deposits should be removed.
18. Protect the motor, air filter, electrical and regulating components, etc. to prevent moisture from
entering them, e.g. when steam cleaning.
19. Make sure that all sound-damping material and vibration dampers, e.g. damping material on the
bodywork and in the air inlet and outlet systems of the compressor, is in good condition. If damaged,
replace it by genuine material from the manufacturer to prevent the sound pressure level from
increasing.
20. Never use caustic solvents which can damage materials of the air net, e.g. polycarbonate bowls.
21. Only if applicable, the following safety precautions are stressed when handling refrigerant:
• Never inhale refrigerant vapors. Check that the working area is adequately ventilated; if
required, use breathing protection.
• Always wear special gloves. In case of refrigerant contact with the skin, rinse the skin with
water. If liquid refrigerant contacts the skin through clothing, never tear off or remove the latter;
flush abundantly with fresh water over the clothing until all refrigerant is flushed away; then
seek medical first aid.
Also consult following safety precautions: Safety precautions during installation and
Safety precautions during operation.
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.
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2920 7140 90 11

2 Introduction
GA 15, GA 18, GA 22 and GA 26 are single- stage, oil injected screw compressors driven by an electric
motor. The compressors are air-cooled. The compressors are enclosed in a sound insulating bodywork.
The compressors are controlled by an Elektronikon® controller, fitted to the door on the front side. The
cabinet with electric equipment is located behind the door panel.
The compressors are available in two versions: the floor mounted version and the receiver mounted
version. Each of these versions can be supplied without integrated air dryer (the Pack version) or with
integrated air dryer (the Full Feature version).
GA Pack
Front view GA 15 P, floor mounted
ER Elektronikon®controller OT Oil separator tank
S3 Emergency stop button AF Air filter
E Compressor element
On the receiver mounted version, the compressor is mounted on a large air receiver (AR) of 500 l (125 gal,
4.5 cu.ft):
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12 2920 7140 90

Front view GA 15 P, receiver mounted
ER Elektronikon® controller AR Air receiver
S3 Emergency stop button AV Air outlet valve
Dm Manual drain, air receiver
GA Full-Feature
GA Full-Feature (FF) compressors are provided with an air dryer, integrated in the canopy. The dryer
removes condensate from the compressed air by cooling the air to near freezing point and automatically
draining the condensate.
Floor mounted compressors are directly installed on the floor:
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2920 7140 90 13

Front view GA 15 FF, floor mounted
ER Elektronikon® controller OT Oil separator tank
S3 Emergency stop button AF Air filter
DR Dryer AV Air outlet valve
On the receiver mounted version, the compressor is mounted on a large air receiver (AR) of 500 l (125 gal,
4.5 cu.ft):
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14 2920 7140 90

Front view GA 15 FF, receiver mounted
ER Elektronikon® controller AR Air receiver
S3 Emergency stop button AV Air outlet valve
Dm Manual drain, air receiver DR Dryer
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2920 7140 90 15

3 Operation
Flow diagrams
Flow diagram, GA Pack
AIntake air COil
BAir/oil mixture DWet compressed air
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Flow diagram, GA Full-Feature
AIntake air DWet compressed air
BAir/oil mixture ECondensate
COil FDried compressed air
Air flow
Air drawn through air filter (AF) and open inlet valve (IV) is compressed by compressor element (E). A
mixture of compressed air and oil (see also paragraph Oil flow hereafter) flows into the oil tank (OT),
where the air is separated from the oil. The compressed air is discharged via minimum pressure valve (Vp)
and air cooler (Ca).
On compressors without integrated dryer, the air flows directly to the outlet valve (AV).
On compressors with integrated dryer, the air flows through air dryer (DR) before it is discharged through
outlet valve (AV). See section Air dryer for details on the operation of the dryer.
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During operation, minimum pressure valve (Vp) keeps the pressure in the separator tank (OT) above a
minimum value, required for lubrication. An integrated check valve prevents the compressed air
downstream the valve from being vented to atmosphere during unloaded operation.
When the compressor is stopped, inlet valve (IV) closes, preventing compressed air and oil to flow to the
air filter.
Regulation
Unloading valve (loaded condition)
• When the net pressure is below the loading pressure, solenoid valve (Y1) is energised.
• The space above unloading valve/blow-off valve (UV) is connected with the oil separator tank
pressure (1) via the solenoid valve.
• Unloading valve/blow-off valve (UV) moves downwards, closing off the connection to channels
(2) and (3).
• Underpressure from the compressor element causes loading plunger (LP) to move downwards
and inlet valve (IV) to open fully.
Result: air delivery is 100%, the compressor runs loaded.
• If the air consumption is less than the air output of the compressor, the net pressure increases. When
the net pressure reaches the unloading pressure, solenoid valve (Y1) is de-energized.
• The pressure above unloading valve/blow-off valve (UV) is released to atmosphere and the
space above valve (UV) is no longer in connection with the oil separator tank pressure (1).
• Unloading valve/blow-off valve (UV) moves upwards, connecting the oil separator tank
pressure (1) with channels (2) and (3).
• The pressure in channel (2) causes the loading plunger (LP) to move upwards, causing inlet
valve (IV) to close, while the pressure is gradually released to atmosphere.
• The pressure in the separator tank stabilizes at low value. A small amount of air is kept drawn in
to guarantee a minimal pressure, required for lubrication during unloaded operation.
Result: air output is stopped, the compressor runs unloaded.
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