Emerson Copeland Discus 4D X Series Application Engineering Bulletin
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Emerson Copeland Discus 4D X Series Application Engineering Bulletin

Emerson Copeland Discus 4D X Series Application Engineering Bulletin

Compressors with demand cooling system
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AE4-1287 R9
Copeland Discus
Section
Safety
Safety Instructions .................................................... 2
Safety Icon Explanation ............................................ 2
Shock, Fire, or Injury to Persons ............................ 3
Safety Statements ................................................... 3
Introduction .............................................................. 4
Operating Range ..................................................... 4
Demand Cooling System ......................................... 4
Demand Cooling System Design ............................. 5
Demand Cooling Compressors ................................ 5
Condenser Sizing .................................................... 5
Demand Cooling System Components .................... 5
System Information ................................................... 6
Unloading .............................................................. 6
Demand Cooling ................................................... 7
Performance Adjustment Factors ............................... 7
Demand Cooling Specifications .................................7
R9
Added R407H refrigerant on multiple sections
© 2021 Emerson Climate Technologies, Inc.
™
Compressors with Demand Cooling

TABLE OF CONTENTS

Page
™
Protection ..........6
™
™
Section
Figures and Tables
Demand Cooling System ......................................... 7
Low Temperature Operating Envelopes with and
Without Demand Cooling ..................................... 8
Temperature Probe ............................................... 9
65°F Return Gas (with Head Fan) .................... 9
Demand Cooling System Diagram ......................... 10
Demand Cooling Wiring Schematics .................. 11-13
Control Actions ....................................................... 14
Demand Cooling Kit Part Numbers ........................ 14
1
September 2021
™
System
Page

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Summary of Contents for Emerson Copeland Discus 4D X Series

  • Page 1: Table Of Contents

    4D and 6D Unloading with Demand Cooling .... 7 ™ 3D Copeland Discus Digital compressors with Demand Cooling ........... 7 Performance Adjustment Factors ....... 7 Demand Cooling Specifications .........7 Added R407H refrigerant on multiple sections © 2021 Emerson Climate Technologies, Inc.

  • Page 2: Safety Instructions

    NOTICE NOTICE is used to address practices not related to personal injury. CAUTION, without the safety alert symbol, is used to address practices CAUTION not related to personal injury. © 2021 Emerson Climate Technologies, Inc.

  • Page 3: Instructions Pertaining To Risk Of Electrical Shock, Fire, Or Injury To Persons

    • Refrigerant compressors must be employed only for their intended use. • install, commission, and maintain this equipment. • • All valid standards and codes for installing, servicing, and maintaining electrical and refrigeration equipment must be observed. © 2021 Emerson Climate Technologies, Inc.

  • Page 4: Introduction

    CoreSense™ technology compressors began to experience internal discharge temperatures that exceed the safe operational limits for Due to these factors, Emerson is pleased to offer long term stability of refrigerant oil. In response to this, updated operating envelopes and guidelines for...

  • Page 5: Demand Cooling System Design

    One side of No new compressor models have been introduced the electronic switch is connected internally to for Demand Cooling. Instead, existing low 'L1' and the other side to output terminal 'S' (see Figure 6). © 2021 Emerson Climate Technologies, Inc.

  • Page 6: Demand Cooling With Coresense Protection

    Cooling has NOT been approved for 3D Moduload. Demand Cooling. However, the discharge temperature protection is provided by the Demand Cooling Note: For Discus compressors with CoreSense module. Discharge temperature information will not be Diagnostics with the build of material (BOM) © 2021 Emerson Climate Technologies, Inc.

  • Page 7: 4D And 6D Unloading With Demand Cooling

    This allows the Demand Cooling module to protect 90-130 for 2D/3D Compressors against high discharge temperatures and inject liquid 90-131 for 4D Compressors when needed. 90-133 for 6D Compressors Figure 1 - Demand Cooling System © 2021 Emerson Climate Technologies, Inc.

  • Page 8: Without Demand Cooling

    Figure 5 for CoreSense temperature probe installation location. For more information on CoreSense, See AE8-1367. If Demand Cooling is applied, head fan and CoreSense are not needed. Figure 4 - CoreSense Discharge Temperature Protection (See AE8-1367 for additional instructions) © 2021 Emerson Climate Technologies, Inc.

  • Page 9: Standard Location Of Coresense Temperature Probe

    *If Liquid Injec on Is Not Installed, Recommend 265°F MAX Discharge Line Temp. Limit Evaporat i n g Temperature (°F) Figure 6 - Low Temperature Operating Envelope for R-22 at 65°F Return Gas (with Head Fan) © 2021 Emerson Climate Technologies, Inc.

  • Page 10: Demand Cooling System Diagram

    DEMAND COOLING INJECTION MANUAL SHUTOFF SENSOR AND CONDENSER VALVE LINE FILTER SENSOR LINES RECEIVER LIQUID LINE FILTER DRIER COMPRESSOR SIGHT GLASS INJECTION SOLENOID VALVE EVAPORATOR SUCTION LINE FILTER ACCUMULATOR Figure 7 Demand Cooling System Diagram © 2021 Emerson Climate Technologies, Inc.

  • Page 11: Demand Cooling Wiring Schematics

    Controls Demand Cooling Module Temp. and the Sentronic are Sensor deenergized when the Injection compressor is not running! Electronic Solenoid Switch L1 L2 Figure 8B Demand Cooling Wiring Schematic less Sentronic Oil Pressure Control © 2021 Emerson Climate Technologies, Inc.
  • Page 12 Demand Cooling Module Demand Sentronic and the Sentronic are Cooling Oil Pressure deenergized when the Module Control compressor is not running! Figure 8D Demand Cooling Wiring Schematic with Isolated Control Contacts © 2021 Emerson Climate Technologies, Inc.
  • Page 13 120v or 240v CoreSense Module Terminal Strip 120v Current Sensor Connector 240v Demand Cooling Module Current Sensor Control Temp. Sensor Injector Control Injection Switch Solenoid Contactor Figure 8E Coresense Protection with Copeland Demand Cooling © 2021 Emerson Climate Technologies, Inc.

  • Page 14: Demand Cooling Operating Setpoints And Control Actions

    Emerson Climate Technologies, Inc. and/or its affiliates (collectively "Emerson"), as applicable, reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any product.

  • Page 15: Appendix - Demand Cooling Diagnostics

    Demand Cooling sensor probe together with electrical tape or hook and loop fasteners (Velcro ). The end of the probe and the ® end of the thermometer must touch. © 2021 Emerson Climate Technologies, Inc.
  • Page 16 This proves solenoid operation. deenergized. This voltage is much less than the Retighten the magnet housing cover screw after this control voltage which is measured when the switch check. © 2021 Emerson Climate Technologies, Inc.
  • Page 17 Figure 1 then go to Step 5. operation. If the suction pressure rises, then go If they are much higher the system should be to Step 6. corrected to lower the temperatures or there may © 2021 Emerson Climate Technologies, Inc.
  • Page 18 Emerson Climate Technologies, Inc. and/or its affiliates (collectively "Emerson"), as applicable, reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any product.

  • Page 19: Important Safety Information

    However, neither the terminal cover nor the molded plug can completely eliminate the risk of venting, ignition, or electric shock. www.Climate.Emerson.com/terminal for more details about terminal venting. Additionally, a compressor’s refrigerant lines keep refrigerant and oil under pressure. When removing or recharging refrigerant from this component during service, this can pose a pressurized fluid hazard.
  • Page 20 Electrical Hazards Until a system is de-energized, and capacitors have been discharged, the system presents a risk of electric shock. Hot Surface and Fire Hazards While the system is energized, and for some time after it is deenergized, the compressor may be hot. Touching the compressor before it has cooled can result in severe burns.
  • Page 21 • Remove refrigerant from both the high and low side of the compressor. Use a recovery machine and cylinder designed for flammable refrigerants. Do not use standard recovery machines because they contain sources of ignition such as switches, high- and low-pressure controls, and relays. Only vent the refrigerant into the atmosphere if the system is in a well-ventilated area.

This manual is also suitable for:

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