Emerson AE4-1395 Air Compressor User Manual


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© 2012 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
AE4-1395
Application Engineering
BULLETIN
3 to 15 Ton Copeland Scroll Digital
™
Compressors for Air Conditioning
AE4-1395
August 2012
Application Engineering
BULLETIN
Safety
Safety Instructions .................................................2
Safety Icon Explanation ........................................2
Instructions Pertaining to Risk of
Electrical Shock, Fire, or Injury to Persons ...........3
Safety Statements .................................................3
Introduction
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Verication ..............................................7
Excessive Liquid Floodback Tests .........................7
Operating Envelope Tests .....................................7
Digital Compressor Retrot Applications
ReasonstoRetrot ................................................. 7
RetrotApplicationsToAvoid .................................. 8
Performance Modeling ............................................ 8
SystemModications .............................................. 8
Compressor Selection & Change-Out ................... 8
Refrigerant Flow Control ....................................... 9
Evaporator Air Flow ............................................... 9
Condenser Air Flow ............................................... 9
Modulation Control ................................................ 9
Assembly Line Procedures
3 To 7.5 Ton Modulation Valve Brazing Procedure ...9
Pressure Testing ......................................................9
Service Procedures
Modulation Troubleshooting ...................................10
3 to 7.5 Ton Modulation Valve Replacement
Procedure ...............................................................10
8 To 15 Ton Modulation Valve Replacement
Procedure ...............................................................10
Scroll Compressor Functional Check ..................... 11
Figures & Tables
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
3-7.5 Ton Operating Envelope ................................14
8-15 Ton Operating Envelope .................................14
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
TABLE OF CONTENTS
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