Atlas Copco GA90 Instruction Book
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Atlas Copco GA90 Instruction Book

Stationary air compressors
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No. 2920 1251 02
Registration code: APC G 90/'99 / 38 / 995
Replaces 2920 1251 01
2000-01
Important
1.
This book applies to the compressors from serial number
AIF-024 378 onwards.
2.
This book must be used together with the "User manual for Elektronikon
2920 1291 0x.
Copyright 2000, Atlas Copco Airpower n.v., Antwerp, Belgium.
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 meets the requirements for instructions specified by the machinery directive
98/37/EC and is valid for CE as well as non-CE labelled machines
®
regulator", printed matter no.

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Summary of Contents for Atlas Copco GA90

  • Page 1 2920 1291 0x. Copyright 2000, Atlas Copco Airpower n.v., Antwerp, Belgium. 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.

  • Page 2: Table Of Contents

    Follow all relevant safety precautions, including those mentioned on the cover of this book. Repairs must be carried out by trained personnel from Atlas Copco who can be contacted for any further information. In all correspondence mention the type and the serial number, shown on the data plate.

  • Page 3: Automatic Control Of Compressor Opreration

    In case the expected unloading period is too short, the compressor is kept running to prevent too- short standstill periods. GA90 up to GA315 and GA90 W up to GA315 W are single- stage, oil-injected screw compressors, driven by an electric Warning motor and enclosed in a sound-insulated bodywork.

  • Page 4: Parts List (Ga90 & Ga110 W)

    Minimum pressure valve Check valve FN2. Fan Oil stop valve DP1. Oil drain plug, air receiver Oil level indicator Loading solenoid valve DP4. Oil drain plug, oil cooler Drive motor Figs. 1. GA90 and GA110 W 2920 1251 02...
  • Page 5 (this time period is called the power recovery not start (indicated as <<Start failure>>). See "User manual time). for Elektronikon regulator", section "Programmable settings for GA90/315". 2920 1251 02...

  • Page 6: Electric Cabinet

    T1/T2. Transformers Q15/16 1X1. Terminal strip 1X3. Earthing rail One contactor/circuit breaker on GA90 and -110, two contactors/circuit breakers on GA132 up to -315, not provided on GA W. Fig. 2. Electric cabinet (typical example) K15/16 50309F K21 F21 50749F Fig.

  • Page 7: Example Of A Main Menu

    Instruction book Compressor outlet 7.0 bar Ref. Designation Automatically loaded Function keys Keys to control and program the Menu Show More Unload compressor. See below. Scroll keys Keys to scroll through the display. Fig. 3b. Example of the main display Tabulator key Key to go to the next field of the display.
  • Page 8 Key position Compressor control mode Compressor off. If it is desired to connect the compressor to an Atlas Copco ES system (e.g. to an ES100 sequence selector), an optional Local control mode (remote control mode communication module (COM1) needs to be installed.

  • Page 9: Oil System

    Instruction book COM1. Communication module MKIII. Electronic regulator SIOE. Expansion modules (upper module not always installed) Guide Slot Plate Cable Fig. 4. Installation of communication module (typical example) in compressor element (E). Compressed air and oil are All GA/GA W discharged to air receiver/oil separator (AR) via check valve Minimum pressure valve (Vp) prevents the receiver pressure (CV).

  • Page 10: Cooling System

    (E1 and E2) from flooding with oil when the compressor is stopped. On GA, the coolers are cooled by fans (FN2/3) (GA90 and - 110 are provided with one fan). GA W are provided with a Valves (BV) by-pass oil cooler(s) (Co) when starting the cooling water system.

  • Page 11: Regulating System

    Instruction book Fig. 5b GA90 up to -160 during loading (13 bar / 200 psi) Air filter(s) Compressor element UV1. Unloading valve Air receiver/oil separator Filler plug, oil UV2. Unloading valve Air outlet valve FN2/3. Fans Minimum pressure valve Thermostatic by-pass valve(s),...
  • Page 12 Instruction book Fig. 5c GA W 200 up to -315 during unloading (10-13 bar/125-150-200 psi) GA/GA W 90 up to -160 Control pressure is fed via flexible (2) and selector valve ® The system is controlled by Elektronikon regulator (CM) (Ss) through solenoid valve (Y1) to valves (V1 and V2).
  • Page 13 Instruction book Fig. 5d GA W 200 up to -315 during loading (7.5 bar/100 psi) outlet of compressor element (E) decreases, valve (V3) For 7.5 bar/100 psi compressors, receiver pressure is closes by spring force and stops blowing off air. released: Valve (V2) allows the small flow of air, which remains - through flexible (2) and valve (V2) to unloader (UA1)
  • Page 14 (Ss) and valve (V1) to chamber (1) of unloader (UA) to open unloading valve (UV). Valve (V2) stops blowing off the air which is drawn in. Air delivery is resumed (100 %), the compressor runs loaded. Fig. 6a. Dimension drawing GA90 and -110 2920 1251 02...
  • Page 15 Instruction book Fig. 6b. Dimension drawing GA W 90 and -110 Fig. 6c. Dimension drawing GA132 and -160 2920 1251 02...
  • Page 16 Instruction book Fig. 6d. Dimension drawing GA W 132 and -160 Fig. 6e. Dimension drawing GA200 up to -315 2920 1251 02...
  • Page 17 Instruction book Fig. 6f. Dimension drawing GA W 200 up to -315 dp = pressure drop (recommended maximum = 0.1 bar) length of outlet pipe in m Install the compressor on a level floor suitable for taking inner diameter of the outlet pipe in mm the weight of the compressor.
  • Page 18 Instruction book Fig. 7. Installation proposal 2920 1251 02...
  • Page 19 Location of air outlet valve Recommended air net volume (sum of receiver volume Cooling water inlet 1) and volume of pipe net) = 2900 l. Consult Atlas Copco Pictograph, cooling water inlet 1) if in any doubt. Pictograph, cooling water outlet 1)
  • Page 20 Instruction book Remarks The size is valid for cable PVC 70°C at ambient 40°C according to EN60204, except for 60 Hz compressors for Canada and USA: cable PVC 90°C at ambient 40°C according to CE code Part I Tables 2, 5A, 17 and rules 28-106, 28-108, 28-110.
  • Page 21 Instruction book Fig. 9a IEC/VDE 2920 1251 02...
  • Page 22 Instruction book Fig. 9b 60 Hz CSA/UL Figs. 9. Electrical connections (typical examples) 2920 1251 02...
  • Page 23 Instruction book Compressor type Mains + earth cable in mm 440/460 V 575 V 3xMCM250 + AWG0 3xAWG00 + AWG4 3xMCM300 + AWG0 3xAWG4/0 + AWG2 2x (3xAWG00 + AWG4) 3xMCM300 + AWG0 2x (3xAWG4/0 + AWG2) 2x (3xAWG00 + AWG4) 2x (3xMCM250 + AWG0) 2x (3xAWG3/0 + AWG2) 2x (3xMCM350 + AWG0)
  • Page 24 85,000. For recirculating systems with proper controls to prevent cooling water problems. If in any doubt, consult and treatment, the sum of the squares may be up to 520,000. Atlas Copco. Note that the sulphate value must include any sulphite present.
  • Page 25 Bush, to be removed Vibration damper Stud and nut, to be removed Vibration damper 1) GA90 and -110 have one fan motor and circuit breaker, GA132 up to -315 have two fan motors and circuit breakers. Figs. 11. Transport fixations 2920 1251 02...
  • Page 26 2) GA90 and -110 have one fan motor and circuit breaker, GA132 Press start button (8). The compressor starts running in up to -315 have two fan motors and circuit breakers.
  • Page 27 Instruction book Example: Ambient temperature ....... . 20°C Relative humidity ........100 % Working pressure .

  • Page 28: Cooling System

    Instruction book Warning Before carrying out any maintenance, repair or adjustment, Press stop button (9). LED (1) goes out. The message stop the compressor, press emergency stop button (S2- <<Programmed stop>> appears. The compressor runs Fig. 3a), switch off the voltage and depressurize the unloaded for 30 seconds and then stops.

  • Page 29: Maintenance Schedule

    Use only authorized parts. Any damage or malfunction caused by the use of unauthorized parts is not covered by Warranty or Product Liability. Whichever interval comes first. The local Atlas Copco Sales Company may overrule the maintenance schedule, especially the service intervals, depending on the environmental and working conditions of the compressor.
  • Page 30 Instruction book Notes In very dusty surroundings it may be necessary to check and replace the air filters more frequently. Consult Atlas Copco. Use Atlas Copco filters. The separator element must be replaced two-yearly or each 8000 running hours or when the pressure difference over the element exceeds 0.8 bar (12 psi).
  • Page 31 Instruction book Clean the filter seats on the manifold. Oil the gaskets of the new filters and screw them into place until the gaskets contact their seats, then tighten by hand. Tighten filler plug (FC1). Reset the oil filter service warning using key <<Reset>> in submenu <<Service>>.

  • Page 32: Service Kits

    Instruction book Service kits Service kits comprise all parts needed for servicing components and offer the benefits of genuine Atlas Copco parts while keeping the maintenance budget low. All service kits are mentioned in the relevant Parts Lists. Service kit for oil filters...

  • Page 33: Problem Solving

    Before carrying out any maintenance or repair, press stop e. Air cooler (Ca) clogged button (9-Fig. 3a), wait until the compressor has stopped e. Consult Atlas Copco. (approx. 30 seconds) and then press emergency stop button f. On GA W, restriction in cooling water system due to (S2).

  • Page 34: Overload Relay/Circuit Breakers/Fuses

    12 bar(e) for 7.5 bar, 10 bar, 100 psi, 125 psi and 150 psi versions 15 bar(e) for 13 bar and 200 psi versions Important Some compressors with a specific approval have valves with other settings. Always consult the data stamped on the valve or consult Atlas Copco. GA/GA W Motor type Supply voltage Max.
  • Page 35 Instruction book GA/GA W Motor Supply Max. setting Max. fuse ratings Compressor Type voltage overload IEC Class IEC Class CSA HRC UL Class K5 type MC2A relay gL(gG) gL(gG) F21 (A) Type 2 1) Type 1 1) 505MB-4 2x (3x224) 3x 500 505MB-4 440/460...

  • Page 36: Compressor Specifications

    Instruction book GA Compressor type Supply voltage (V) Maximum setting of circuit breaker Q15 and Q16 (A) 90/160 12.5 90/160 90/160 90/160 200/250 15.8 200/250 200/250 GA Compressor type Supply voltage (V) Maximum setting of circuit breaker Q15 and Q16 (A) 90/160 220/230 11.5...
  • Page 37 Instruction book Compressor type 90 W 110 W 132 W 160 W Maximum working pressure . . bar(e) Nominal working pressure . . . bar(e) Air temperature at outlet valve, approx....°C Motor shaft speed .
  • Page 38 Instruction book Compressor type 90 W 110 W 160 W Maximum working pressure ..bar(e) Nominal working pressure ... bar(e) Air temperature at outlet valve, approx. °C Motor shaft speed .
  • Page 39 Instruction book Compressor type 90 W 110 W 160 W Maximum working pressure ..bar(e) 13.8 13.8 13.8 13.8 13.8 13.8 Nominal working pressure ... bar(e) 13.3 13.3 13.3...
  • Page 40 Instruction book Compressor type 200 W 250 W 315 W Maximum working pressure ..bar(e) Nominal working pressure ... bar(e) Air temperature at outlet valve, approx. °C Motor shaft speed .

  • Page 41: Conversion List Of Si Units

    Instruction book Compressor type 250 W 315 W Maximum working pressure ..... . bar(e) 13.8 13.8 13.8 13.8 Nominal working pressure ..... . . bar(e) 13.3 13.3 13.3...

This manual is also suitable for:

Ga110Ga132Ga250Ga315Ga160Ga200 ... Show all

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