Application Engineering |
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B | U | L | L | E | T | I | N |
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| August 2012 | |
3 to 15 Ton Copeland Scroll Digital™ Compressors for Air Conditioning
TABLE OF CONTENTS
Section | Page | Section | Page |
Safety |
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Safety Instructions | 2 |
Safety Icon Explanation | 2 |
Instructions Pertaining to Risk of |
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Electrical Shock, Fire, or Injury to Persons | 3 |
Safety Statements | 3 |
Introduction |
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Nomenclature | 4 |
Digital Compressor Operation | 4 |
How It Works | 4 |
Application Considerations |
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Operating Envelope | 4 |
Solenoid Valve and Coil | 5 |
Pressure Fluctuations | 5 |
Piping | 5 |
Start Up and Shut Down | 5 |
Compressor Cycling | 5 |
Sound Characteristics | 5 |
Internal Pressure Relief (IPR) Valve | 5 |
High Pressure Control | 5 |
Low Pressure Control | 5 |
Scroll Temperature Protection | 6 |
Crankcase Heaters | 6 |
Oil Type and Oil Removal | 6 |
Power Factor | 6 |
Tandem Applications | 6 |
Modulation Control | 7 |
Application Tests |
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Oil Level Verification | 7 |
Excessive Liquid Floodback Tests | 7 |
Operating Envelope Tests | 7 |
Digital Compressor Retrofit Applications |
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Reasons to Retrofit | 7 |
Retrofit Applications To Avoid | 8 |
Performance Modeling | 8 |
System Modifications | 8 |
Compressor Selection & | 8 |
Refrigerant Flow Control | 9 |
Evaporator Air Flow | 9 |
Condenser Air Flow | 9 |
Modulation Control | 9 |
Assembly Line Procedures |
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3 To 7.5 Ton Modulation Valve Brazing Procedure.... | 9 |
Pressure Testing | 9 |
Service Procedures |
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Modulation Troubleshooting | 10 |
3 to 7.5 Ton Modulation Valve Replacement |
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Procedure | 10 |
8 To 15 Ton Modulation Valve Replacement |
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Procedure | 10 |
Scroll Compressor Functional Check | 11 |
Figures & Tables |
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Digital Cycle Example | 12 |
3 to 7.5 Ton Digital Scroll Cross Sectional View | 12 |
8 to 15 Ton Digital Scroll Cross Sectional View | 13 |
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Compressor Capacity Graph | 15 |
Discharge Thermistors | 15 |
3 to 7.5 Ton Modulation Valve Piping | 16 |
3 To 7.5 Ton Tandem | 16 |
Modulation Troubleshooting | 17 |
Copeland Scroll Digital Family Features | 18 |
Refrigerant Charge Limits | 18 |
Torque Values | 18 |
Compressor Accessories | 19 |
© 2012 Emerson Climate Technologies, Inc. | 1 |
Printed in the U.S.A. |
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