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© 2015 Emerson Climate Technologies, Inc. All rights reserved.
AE4-1395 R5
3 to 15 Ton Copeland Scroll Digital
™
Compressors for Air Conditioning
AE4-1395 R5
April 2016
Safety
Safety Instructions .................................................. 2
Safety Icon Explanation ......................................... 2
Instructions Pertaining to Risk of
Electrical Shock, Fire, or Injury to Persons ............ 3
Safety Statements .................................................. 3
I
ntroduction
.............................................................. 4
Nomenclature ........................................................ 4
Digital Compressor Operation ............................... 4
How It Works ........................................................ 4
Application Considerations
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
Oil Level Verification
............................................... 7
Excessive Liquid Floodback Tests .......................... 7
Operating Envelope Tests ...................................... 7
Digital Compressor Retrofit Applications
Reasons to Retrofit
................................................ 7
Retrofit Applications To Avoid
................................. 8
Performance Modeling ........................................... 8
System Modifications
............................................. 8
Compressor Selection & Change-Out .................. 8
Refrigerant Flow Control ...................................... 9
Evaporator Air Flow .............................................. 9
Condenser Air Flow .............................................. 9
Modulation Control ............................................... 9
Assembly Line Procedures
Modulation Valve Brazing Procedure ...................... 9
Pressure Testing ..................................................... 9
Service Procedures
Modulation Troubleshooting ................................. 10
Modulation Valve Replacement
Procedure ............................................................. 10
Scroll Compressor Functional Check ................... 12
Figures & Tables
Digital Cycle Example .......................................... 13
Digital Scroll Cross Sectional View ...................... 13
Digital Scroll Cross Sectional View ...................... 14
Compressor Capacity Graph ................................ 15
Discharge Thermistors ......................................... 15
Modulation Valve Piping ....................................... 16
Tandem ................................................................ 16
Modulation Troubleshooting ................................. 17
Copeland Scroll Digital Family Features .............. 18
Refrigerant Charge Limits .................................... 18
Torque Values ....................................................... 18
Compressor Accessories ..................................... 19
TABLE OF CONTENTS
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