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FScurtis SE Series Operator's Manual

Belt driven rotary screw compressors
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OPERATOR'S MANUAL
SE Series
Belt Driven Rotary Screw Compressors
SE20
SE25
SE30
SE40
SE50
Personal injury and/or equipment damage will result by failing to pay attention
to the vital safety information and instructions in this manual.
Carefully read, understand, and retain all safety information and instructions
phone: 314/383-1300 fax: 314/381-1439
WARNING
WARNING
WARNING
WARNING
before operating this compressor.
Curtis-Toledo, Inc.
1905 Kienlen Ave. St. Louis, MO 63133
WWW.FSCURTIS.COM
Email:
info@curtistoledo.com
CAP-862
June, 2008
Rev A

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Summary of Contents for FScurtis SE Series

  • Page 1 CAP-862 June, 2008 Rev A OPERATOR’S MANUAL SE Series Belt Driven Rotary Screw Compressors SE20 SE25 SE30 SE40 SE50 WARNING WARNING WARNING WARNING Personal injury and/or equipment damage will result by failing to pay attention to the vital safety information and instructions in this manual.
  • Page 2 WARNING WARNING WARNING WARNING WHEN DISCONNECTING POWER FROM THE UNIT, POWER MUST BE OFF FOR A MINIMUM OF 15 SECONDS OR AN ERROR CODE MAY BE DISPLAYED ON THE CONTROLLER. TO CLEAR AN ERROR CODE, REFERENCE CONTROLLER MANUAL...

  • Page 3: Table Of Contents

    CAP862 Table of Contents Contents 1.0 Introduction - Preface ……………………………………………………………………………………..1-1 - Safety ………………………………………………………………………………………1-5 2.0 Receiving and Installation - Installation / Precaution ……………………………………………………………………2-1 -Electrical ……………………………………………………………………………………2-2 3.0 Principle of Screw air compressor - General …...………………………………………………………………………………..3-1 - Air/Oil… ………………………………………………………………………………..3-2 4.0 System Flow Chart and Components Function - System Flow Chart …………………………………………………………………………4-1 - Description …………………………………………………………………………………4-2 - SE20 &...

  • Page 4: Preface

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Preface Warning Read the manual before assembly and operation. Become familiar with this information, its safety instructions and its operation before beginning any work. Serious personal injury may result from safety or operational information is not understood or familiarized.
  • Page 5 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Illustration of symbols Symbols Description of symbols Prohibited Extreme caution ◎ Warning Labels are placed on the machines. If the labels are not clear or missing, please contact CURTIS directly. ◎ Explanations of safety symbols Operation manual Follow the instructions before use of this compressor.
  • Page 6 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Danger: Electric circuits Danger: Rotating parts Danger: Hot or noxious gases outlet: unbreathable Danger: Heat. Do not touch hot areas Rotation Chapter 1 Page 3...
  • Page 7 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Read instruction Hearing protection Turn off power supply before maintenance or operating around electric equipment, such as starter, and motor. Remove the 4 bolts that secure the air end/motor sub frame to the enclosure before test run or startup. DO NOT loosen the bolts that go though the isolators.

  • Page 8: Safety

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual ※ ※ ※ ※ Please do not tear off label stickers from the machine Safety 1. Become familiar with this manual and follow the instructions before operating the compressor. 2. If any malfunctions or trouble occurs, do not run compressor until problem is resolved. 前...
  • Page 9 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Additional Safety information for Air Compressors Like all power tools, there is danger associated with operating this equipment. Accidents are frequently caused by lack of familiarity or failure to pay attention. Use this machine with extreme caution.

  • Page 10: Receiving And Installation

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Chapter 2 Receiving and Installation A. Receiving 1. Please check if you received the correct shipment as you ordered. 2. Please check if the machine and any accessories received any damage during the shipment. B.

  • Page 11: Electrical

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 2. Foundation (1). Select a solid and level surface foundation to install the compressor. (2). There is no need to construct a base for screw air compressor since the vibration of it is relatively small.
  • Page 12 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Electrical (cont.) Failure to properly ground compressor package could result in controller malfunction. All internal wiring has been done at the factory. Wiring of the power supply to the compressor should be done by a qualified electrician to comply with the National Electric Code, state code, and any local codes in accordance with the wiring diagram specific to your compressor model shown in the included wire diagram.

  • Page 13: General

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Chapter 3 General Description COMPRESSOR The compressor assembly is an oil flooded positive displacement, single stage, helical screw type unit consisting of two rotors or screws supported axially by roller bearings and enclosed in a housing or stator as depicted in the sectional view Figure 3-1.

  • Page 14: Air/Oil

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual AIR/OIL FLOW Air enters the compressor through the air filter and air inlet valve where it is mixed with oil. After compression the air/oil mixture is discharged into the oil separator where its velocity is reduced causing most of the oil to drop to the bottom.

  • Page 15: System Flow Chart And Components Function

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Chapter 4 System flow chart and components function A. System flow chart and components function SE20-50 System Flow Chart Air intake filter Oil filter Motor Air outlet ball valve Intake valve Oil separator 2-way solenoid valve Oil level gauge Pulley air end side...

  • Page 16: Description

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual B. Description of system flow chart and component function 1. Air flow path (refer to the flow chart of each type) 1.1. After dust is removed by intake filter, clean air goes through the intake valve into the compression chamber and is mixed with oil.
  • Page 17 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual (8). After Cooler This is the cooler for air-cooled series compressors. The compressed air is being cooled by fan blowing air through the radiator. Generally discharge air temperature is 10-15°F above ambient temperature. Environment is a crucial factor for air-cooled type air compressors;...
  • Page 18 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 3. Cooling system Air-cooled Air is fed by a fan through the radiator fins and dissipates heat away from the compressed air and oil. The highest allowable unit temperature setting is 230°F (110℃). Any temperature above this will result in compressor shutdown.
  • Page 19 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual SE Series Screw Air Compressor Specification Model SE20 SE25 Item Operating Pressure psig 10.3 12.1 10.3 12.1 Capacity /min Discharge Temp. °F Ambient temperature+27° Pressure relief PSIG Setting pressure 200 psi valve setting Power 18.5...
  • Page 20 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Model SE30 SE40 Item Operating Pressure psig 10.3 10.3 Capacity /min Discharge Temp. °F Ambient temperature+27° Pressure relief PSIG Setting pressure 200 psi valve setting Power Type TEFC Main Motor Speed 3530 1770 Fan Motor Power 1 / 0.75...
  • Page 21 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Model SE50 Item Operating Pressure psig 10.3 Capacity /min Discharge Temp. °F Ambient temperature+27° Pressure relief PSIG Setting pressure 200 psi valve setting Power Type TEFC Main Motor Speed 1770 Fan Motor Power 1.5 / 1 Starter Y-△...

  • Page 22: Protection / Warning

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Protection and warning 1. Motor overload protection There are two motors in the compressor assembly. One is the main driving motor and the other is a cooling fan motor. Generally, when running current that exceeds the upper limit of the relay, the main power will shutdown automatically.
  • Page 23 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Control system and electric circuit 1. Control system （1）Motor startup During the startup period, the intake valve is closed; the relief valve is opened making the suction side in a vacuum. Oil circulates to lubricate the compression chamber and the bearing is protected by the pressure difference between the vacuum and atmosphere.
  • Page 24 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Chapter 5 Operating Procedure A Test run: startup and shutdown 1. Connect power and grounding cable, and check power supply. 2. Maintain oil level keeping it: - Visible in the sight class for the SE20-SE30. - Arrow in the green section of the gauge placed on the separator tank for the SE40-SE50.

  • Page 25: Storage

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 3. Inspect the oil level after 10 minutes of shutdown. The Oil level could read lower during operation. C During operation 1. Shutdown the compressor if abnormal noise or vibration is observed. 2.

  • Page 26: Maintenance

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.0 Maintenance 6.1 Maintenance Intervals Check the sump for the correct oil level. Drain condensate from air receiver. (If available) Daily or Every 8 Hours Check the pressure reading to insure proper operating point Check controls for proper operation.

  • Page 27: Air Filter / Oil Filter

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.2 Air Filter The air filter is the primary protection of the compressor from harmful dirt being ingested into the oil system. It needs to be looked at weekly for clogging or holes. The period for these inspections is dependent on the environment the machine is in (at least 2000 hours).

  • Page 28: Air/Oil Separator

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.4 Air/Oil Separator The air/oil separator should be changed every 4000 hours, once a year, or when there is excessive oil vapor in the discharge air, or as indicated by a maintenance indicator, which ever occurs first.

  • Page 29: Lubricant

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.6 Lubricant Your compressor has been filled and tested with a high quality synthetic compressor lubricant. It has the advantage of extended service life, high temperature operation, easy start-up when cold, reduced sludge and lacquer buildup, and is completely compatible with all seals, gaskets, and other compressor materials.

  • Page 30: Oil Analysis

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Oil Analysis Oil analysis is an excellent tool to add to your compressor maintenance program. At regular intervals you submit lubricant samples to a qualified laboratory. From this you receive a detailed report showing the lubricant condition, wear metals, and contaminants. The rate that these measurements change over time provides the basis for predictive compressor maintenance.
  • Page 31 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.7 Thermostatic Valve The thermostatic valve is a non-adjustable temperature control valve. On the compressor we use this valve to mix hot and cold oil. It will begin to open at 127 F and be full open at F.

  • Page 32: Belts

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 5. Remove piston and seat. 6. Inspect the valve body for scratches and deterioration of the seating surfaces. 7. Replace old parts with the renewal parts and re-assemble the valve. 8. If you loosened the fill plug to insure pressure relief, replace it and tighten. 9.

  • Page 33: Sheave

    Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual Sheave Alignment Any degree of sheave misalignment will result in a reduction of belt life. Misalignment whether parallel or angular should not exceed 1/16”. Parallel misalignment occurs when the shafts are parallel, but the face of the sheaves is not in alignment.
  • Page 34 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.10 Fan Check the fan for cracking, loose rivets, and bent or loose blades. Make sure that it is securely mounted and tighten the mounting screws if loose. Replace a damaged fan immediately.
  • Page 35 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual CAUTION CAUTION CAUTION CAUTION Over greasing is a major cause of bearing and motor failure. Make sure not to over grease or to introduce any contaminants during greasing. WARNING WARNING WARNING WARNING Rotating machinery can cause injury or death.
  • Page 36 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 6.12 AIR E D/MOTOR REMOVAL Air end/motor removal and installation (Note: It is important to have clear access to the air end/motor area) Lifting devices are necessary for the removal and installation of the air end/motor A) Turn off compressor.
  • Page 37 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual SE Product Recommended Maintenance Initial Start-Up Recommended Maintenance Required Operating Hours 2000 4000 6000 8000 10000 12000 Air Filter Oil Filter Oil Separator Oil, Food Grade (RS4000FG) Oil, Synthetic (RS8000) Minimum Pressure Valve Suction valve Thermo valve Motor bearing lubrication...
  • Page 38 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual 7.0 Troubleshooting a. No power Compressor will not start b. Fuses blown in the control circuit. c. Motor overload latch not reset. d. Heaters not installed in starter. e. Loose or missing wires or components in the control circuit.
  • Page 39 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual a. Pressure switch set too low Compressor will not load b. Inlet valve will not open. c. Faulty solenoid valve. Capacity (delivery) is below stated amount a. Restricted inlet air filter. b. Inlet valve partially closed. c.
  • Page 40 Curtis-Toledo Rotary Compressor CAP862 Operations and Maintenance Manual a. Elevated ambient temperature. High Temperature Shutdown b. Low sump oil level. c. Plugged oil filter. d. Restricted cooling airflow. e. Clogged heat exchanger. f. Thermal bypass is leaking g. Faulty high air temperature switch. h.

  • Page 41: Bearings

    CAP862 8.0 Maintenance Log Model: _____________________ Serial umber: _____________________ Changed Greased Checked Hourmeter Cleaned Motor Fitting Date Reading Cooler Separator Bearings Tightness Filter Filter Chapter 8 Page 1...
  • Page 42 CAP862 OTES Chapter 8 Page 2...

This manual is also suitable for:

Se20Se25Se30Se40Se50

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