Emerson AE4-1395- Manual
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Table of Contents:
- Page 2 – Application Engineering; Copeland Scroll; DANGER; NOTICE; CAUTION
- Page 3 – ELECTRICAL SHOCK HAZARD; WARNING
- Page 5 – A high pressure control must be used in all
- Page 6 – POE must be handled carefully and the proper
- Page 7 – For OEMs that choose their own controls; Oil Level Verification
- Page 8 – Retrofit Applications To Avoid; equipment modifications.; Performance Modeling; System Modifications; being considered for the digital scroll retrofit,; Disconnect and lockout the power supply.
- Page 9 – The above procedures for changing the
- Page 12 – Figure 1
- Page 13 – Figure 3; Removable External; 0 Frame Digital Scroll
- Page 14 – Figure 5
- Page 15 – Figure 7; 5 Second Operating Cycle
- Page 16 – Figure 8; Arrow on valve
- Page 17 – Modulation Troubleshooting
1
© 2012 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
AE4-1395
Application Engineering
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3 to 15 Ton Copeland Scroll Digital
™
Compressors for Air Conditioning
AE4-1395
August 2012
Application Engineering
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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
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
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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Summary
2 © 2012 Emerson Climate Technologies, Inc. Printed in the U.S.A. AE4-1395 Application Engineering B U L L E T I N Safety Instructions Copeland Scroll ™ compressors are manufactured according to the latest U.S. and European Safety Standards. Particular emphasis has been placed on the user's safety. ...
3 © 2012 Emerson Climate Technologies, Inc. Printed in the U.S.A. AE4-1395 Application Engineering B U L L E T I N ELECTRICAL SHOCK HAZARD • Disconnect and lock out power before servicing. • Discharge all capacitors before servicing. • Use compressor with grounded system only. • Molded electrical pl...
5 © 2012 Emerson Climate Technologies, Inc. Printed in the U.S.A. AE4-1395 Application Engineering B U L L E T I N Compressor operation during the loaded state should always be inside of the envelope. The envelopes represent allowable operation of the compressor with 20F° suction superheat at rated ...
