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Coaire CHSA-7.5M Maintenance Manual And Parts List

M-series rotary screw air compressors
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COAIRE M-Series
ROTARY SCREW AIR COMPRESSORS
MAINTENANCE MANUAL AND PARTS LIST
MODEL
CHSA-15CHSA-20M
COAIRE TECHNOLOGIES, CORPORATION
For proper and safe use of the compressor, please follow all instructions and safety precautions as identified in
All rights reserved
MODEL
CHSA-7.5M
CHSA-15M
SERIAL NO. :
MODEL NO. :
this manual, along with general safety regulations and practices.
EXTROLLER Control System
CHSA-10M
CHSA-20M
Printed in USA

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  • Page 1 SERIAL NO. : MODEL NO. : MODEL CHSA-15CHSA-20M COAIRE TECHNOLOGIES, CORPORATION For proper and safe use of the compressor, please follow all instructions and safety precautions as identified in this manual, along with general safety regulations and practices. All rights reserved...
  • Page 2 SAFETY AND PRECAUTIONS Before you install the air compressor you should take the time to carefully read all the instructions contained in this manual. Electricity and compressed air have the potential to cause severe personal injury or property damage. Before installing, wiring, starting, operating or making any adjustments, identify the components of the air compressor using this manual as a guide.
  • Page 3 STATEMENT OF WARRANTY TERMS & CONDITIONS COAIRE’s screw air compressors are warranted to be free of defects in materials and workmanship under proper use, installation, and application. This warranty shall be for a period of 15 months from date of shipment from our factory or other stocking facilities or 12 months from date of installation.
  • Page 4 TABLE OF CONTENTS Chapter Ⅰ. General information 1-1. Instruction ..............................1-2. Screw compression process ........................1-3. Compressed air flow ..........................1-4. Cooling air flow ............................1-5. Oil separation ............................1-6. Oil flow ..............................1-7. Oil scavenge flow ............................. 1-8. Standard Specifications ..........................1-9.

  • Page 5: Screw Compression Process

    CHAPTER I GENERAL INFORMATION 1-1. INSTRUCTION. COAIRE screw air compressor unit is a complete package type driven by an electric motor. It is single stage, oil injected, rotary screw type with all components full piped, wired and mounted on a common base;...

  • Page 6: Compressed Air Flow

    1-3. COMPRESSED AIR FLOW. The panel has an intake duct through which air is drawn into the enclosure. Airflows through an air intake filter, intake silencer and suction control valve to the air-end suction port. Air then is compressed by the rotation of the male rotor, and oil is injected into the air-end during compression process.

  • Page 7: Standard Specifications

    Thermostat PT : Pressure Transmitter Valve TS : Temperature Sensor PI : Pressure Indicator M : Motor Oil Cooler Fig 1-5. Operating flow diagram 1-8. STANDARD SPECIFICATIONS MODEL CHSA-7.5M CHSA-10M CHSA-15M ITEM Motor output Kw(HP) 5.5(7.5) 7.5(10) 11(15) Discharge pressure...

  • Page 8: Installation And Wiring

    MODEL CHSA-20M CHSA-25M CHSA-30M ITEM Motor output Kw(HP) 15(20) 19(20) 22(30) Discharge pressure psi(g) Air delivery 73.4 68.0 64.0 125.3 115.0 108.0 Compressor speed 8280 7900 7500 5700 5380 5160 Oil flow rate 11.9 11.9 Ambient temperature 32 115 ℉ ∼...
  • Page 9 CHSA-7.5M CHSA-10M CHSA-15M CHSA-20M CHSA-25M CHSA-30M (Unit : Inch) Fig 1-8. The space clearance example CAUTION - Install the unit in a dust-free room of low humidity and on a level concrete floor. - Never install the unit on timbers or block. High humidity may result in electrical shorts and corrosion.
  • Page 10 Fig 1-9. Parallel installation Fig 1-10. Installation with reciprocating compressor This extensive line of Coaire screw air compressors has been designed to provided all 1-9-4. ELECTRICITY. the conveniences of air supply system, especially for the stats of the art manufacturing industries. These units are composed of compressor, motor, protection devices and control equipment.
  • Page 11 OUTPUT INPUT POWER[V] F.L.A. FRAME TRIP TRIP FACTOR [㎟] [㎟] [kW/Hp] [kW] 3ø60Hz DIRECT Y-DELTA [AF] 19.0 70.8 22.8 1.25 CHSA-7.5M 5.59/7.5 6.39 17.0 64.0 20.4 1.25 32.0 10.2 1.25 25.6 74.1 30.72 CHSA-10M 7.46/10 8.43 23.2 67.0 27.84 11.6 38.5...

  • Page 12: Initial Start-Up

    CHAPTER II OPERATING INSTRUCTIONS 2-1. INITIAL START-UP. Before starting the unit for the first time, all operators must become familiar with all parts and assemblies. Only qualified personnel are to start the machine(Contact your distributor). 2-1-1. BEFORE OPERATION Make sure that : All installation piping and electrical work has been properly installed and completed.

  • Page 13: Daily Operation

    ⒢ gradually close the isolation stop valve until the discharge pressure gauge indicates the same pressure as the oil sump pressure. WARNING Do not loosen the oil-filling plug before the internal pressure is vented completely. Make sure that the oil-filling plug is tightly fastened after oil has been added. Restart the unit. Check the oil piping for any oil leak, and correct as required.
  • Page 14 Oil filter diff. switch Discharge temperature switch ℉ 2-4 Factory Set Values Items Factory set point Adjustable Range Compressor discharge shut down temperature 220 ℉ 176 ~ 230 ℉ Start idling time 5 Sec. 5 ~ 10 Sec. Unloading control time 5 Min.

  • Page 15: Drive Motor

    CHAPTER III FUNCTIONAL DESCRIPTIONS Oil injected, single stage, rotary screw type that primarily consists of rotors, 3-1. COMPRESSOR AIREND. housing, and shaft seal along with other component parts. Features Precision grind rotors provide close inter -lobe clearance. This minimizes leakage and increases efficiency. ■...

  • Page 16: V-Belt Drive

    3-12. INSTRUMENT PANEL. Consists of start button, stop button, indicating lamps, synoptic display, control panel and pressure gauge. Consists of pre-wired direct starter for model CHSA-7.5M through 3-13 STARTER AND CONTROL BOX. CHSA-30M and star-delta starter useable for model CHSA-30M optionally.
  • Page 17 3-14. SAFETY DEVICE Shutdown switch for discharge high air temperatures ⒜ Differential shutdown switch for oil filter ⒝ Differential shutdown switch for oil separator element ⒞ ⒟ Overload for motor ⒠ Overload for cooling fan motor Safety valve ⒡...

  • Page 18: Min. Pressure Valve

    CHAPTER IV SCHEDULED MAINTENANCE 4-1. STANDARD MAINTENANCE SCHEDULE. Maintenance schedule is instructed as below. The intervals are a guide based on normal operating conditions. If operated in a severe environment, necessary maintenance service should be performed on a more frequent basis. User should carry out the maintenance work, based on either the running hours or the calendar time whichever comes first.
  • Page 19 CONSULT YOUR DISTRIBUTOR FOR MAINTENANCE SERVICE AND COLUBE 68 COMPRESSOR OIL. 4-2-1. FUNCTIONS OF OIL. Oil is an essential factor in the oil flooded rotary screw compressor. Use COAIRE COLUBE 68 only, which is developed for pressurized circulation system, containing rust, foam, oxidation and wear inhibitors along with effective water release characteristics.
  • Page 20 After securely tightening the plug at the oil filling port, run the unit to make sure there are no oil leaks. ⒢ 4-2-3 DRAINING CONDENSATION. Moisture contained in intake air can be condensed into water during long unloading time or when the unit is stopped, and this moisture is accumulates in the separator sump, Since the water in a compressor system can cause deterioration of oil and internal rusting, do not neglect draining the condensation at least on a daily basis.

  • Page 21: Trouble Shooting

    CHAPTER V TROUBLE SHOOTING As a guide, the most likely problems are listed in the table below. Before doing any work on this unit, be sure the electrical supply has been shut off and the entire compressor system has been vented of all pressure. In case of the automatic safety shutdown, the operating panel will indicate the shutdown mode.
  • Page 22 discharge air contains oil b. Oil leak : mist b-1. From mechanical seal(Too much leak) b-1. Consult the distributor b-2. From joint b-2. Retighten c. Failed or clogged oil separator element c. Replace d. Faulty installation of separator element d. Correct e.

  • Page 23: Operation Record Form

    5-2. OPERATION RECORD FORM...
  • Page 24 CHAPTER VI CORRECTIVE MAINTENANCE If the differential pressure between inlet and outlet of the oil filter reaches 18.5 psig, it 6-1. OIL FILTER. means that an oil filter is in a severe clogging state and you must clean the oil filter immediately. The replacement of oil filter element under normal operating conditions should be performed every 1,000 hours or once a monthly whichever comes first.

  • Page 25: Suction Filter

    Whenever the operating time is over 500 hours or as required in service operating 6-2. SUCTION FILTER. conditions, clean the suction filter. To clean the suction filter, please follow the steps as described below : After stopping the unit, remove the cover. Unscrew the nu t off, ⒜...

  • Page 26: Oil Seal

    Fig 6-3. Separator Element Mechanical seal is located on the suction side of male rotor shaft. The 6-4. AIREND MECHANICAL SEAL. contact surfaces are lubricated by oil, which is fed through a port in the oil seal housing. The drain tube for this oil is routed back to the air intake via a check valve.

  • Page 27: Suction Control Valve

    WARNING The correct minimum pressure is vital for the function of the compressor. Tampering with the adjustment may cause a compressor breakdown. Valves should be adjusted by authorized personnel. Contact your distributor. Service the suction control valve every 6,000 hours of operation or yearly 6-6.

  • Page 28: Oil Temperature Regulating Valve

    6-8. OIL TEMPERATURE REGULATING VALVE. Service the oil temperature regulating valve every 6,000 hours of operation or at once a year whichever comes first. Please proceed as follows : Stop the unit and disconnect the electrical mains. Make sure that the unit is completely depressurized. ⒜...

  • Page 29: V-Belt

    V-belts and pulley grooves, abnormal heat generation, loss of pressure, etc. ⓑ Too tightly tensioned V-belts may develop the problems such as; shaft damage, short service life of bearings, etc. NOTE Consult with distributor in your area for V-belts replacement, if any of the followings has occurred before the normal replacement interval (12,000 hours) : ⓐ...

  • Page 30: Pressure Transmitter

    Appendix-A COMPRESSOR PART LIST NK40) 1. Part List for Model CHSA-7.5/10M( Item Part Number Description QTY. CHSA-7.5/10M-3-1 Air-end CHSA-7.5/10M-3-2 Intake Control Valve w/Air Filter CHSA-7.5/10M-3-3 Separator Cartridge CHSA-7.5/10M-3-4 Oil Filter CHSA-7.5/10M-3-5 Temperature Prove Connection CHSA-7.5/10M-3-6 Oil Circuit / Out CHSA-7.5/10M-3-7 Oil Reservoir CHSA-7.5/10M-3-8 Oil Circuit / In...
  • Page 31 AIR-END, NK40...
  • Page 32 NK60) . Part List for Model CHSA-15/20M( Item Part Number Description QTY. CHSA-15/20M-3-1 Air-end CHSA-15/20M-3-2 Intake Control Valve w/Air Filter CHSA-15/20M-3-3 Separator Cartridge CHSA-15/20M-3-4 Oil Filter CHSA-15/20M-3-5 Temperature Prove Connection CHSA-15/20M-3-6 Oil Circuit / Out CHSA-15/20M-3-7 Oil Reservoir CHSA-15/20M-3-8 Oil Circuit / In CHSA-15/20M-3-9 Safety Valve CHSA-15/20M-3-10...
  • Page 33 AIR-END, NK60...
  • Page 34 Appendix-B CHSA-7.5M(1/2) 1. PART LIST FOR MODEL...
  • Page 35 CHSA-7.5M(2/2) 1. PART LIST FOR MODEL...
  • Page 36 CHSA-10M(1/2) 2. PART LIST FOR MODEL...
  • Page 37 CHSA-10M(2/2) 2. PART LIST FOR MODEL CHSA-15M(1/2) 3. PART LIST FOR MODEL...
  • Page 38 CHSA-15M(2/2) 3. PART LIST FOR MODEL...
  • Page 39 CHSA-20M(1/2) 4. PART LIST FOR MODEL...
  • Page 41 CHSA-20M(2/2) 4. PART LIST FOR MODEL...

  • Page 42: C. Wiring Diagram

    C. Wiring Diagram for Model CHSA-7.5/10/15/20M...
  • Page 43 Appendix-D for Model CHSA-7.5/10M 1. Outline Drawing...
  • Page 44 for Model CHSA-15/20M Outline Drawing...

  • Page 45: Warranty Claim Report

    Warranty Claim Report Please complete the following claim form, your claim will be confirmed by our sales representative. To : Coaire Technologies, Corporation 8740 Pioneer Blvd., Santa Fe Springs, CA 90670 Tel(562)463-3935.Fax(562)463-4928 Company Date Distributor Model Address Serial No. Company Run Hours Hrs.
  • Page 46 TECHNOLOGIES CORP. 12226 COAST DRIVE, WHITTIER, CA 90601 TEL.(562)463-3935 ㆍ FAX(562)463-4928 STARTUP REPORT FOR ROTARY SCREW AIR COMPRESSOR Please fill out completely and return to the factory to validate warranty. CUSTOMER AND MACHINE INFORMATION CUSTOMER FACTORY SHIP DATE ADDRESS DATE STARTED UP CITY/STATE MODEL NUMBER CHSA-...
  • Page 47 QUALITY AND RELIABILITY WITHOUT COMPROMISE TECHNOLOGIES CORP. 8740 Pioneer Blvd., Santa Fe Springs, CA 90670 TEL.(562)463-3935 ㆍ FAX(562)463-4928 COAIRE reserves the right to make changes, at any time without notice as a result of our commitment to continuous improvement. COAIRE-CHSA-M07...

This manual is also suitable for:

Chsa-10mChsa-20mChsa-15m

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