Emerson Copeland Scroll ZO21K5E Application Engineering Bulletin
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Emerson Copeland Scroll ZO21K5E Application Engineering Bulletin

Compressors for co2 subcritical refrigeration (r-744)
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AE4-1372 R4
Copeland Scroll™ Compressors for CO
Safety Instructions ....................................................... 2
Safety Icon Explanation ........................................... 2
Fire, or Injury to Persons .......................................... 3
Safety Statements .................................................... 3
Introduction .................................................................. 4
2
DX System ................................................................... 4
Nomenclature ........................................................... 4
Approved Oils & Refrigerants .................................. 4
Mounting Parts ......................................................... 4
Safety Relief Valves ................................................. 5
High-Pressure Safety Controls ................................ 5
Active Oil Management ............................................ 5
Accumulators ........................................................... 6
Screens .................................................................... 6
Mufflers .................................................................... 6
Electrical Connection ............................................... 6
Crankcase Heaters .................................................. 6
527-0157-00 ............................................................... 12
Requirements ............................................................. 13
Revision Tracking R4
Pg. 2 New Pressure Safety Icon added
Pg. 4 Caution tag added to superheat requirement.
Pg. 4 Notes about oil recharging values added.
Pg. 5 Model numbers chart moved to pag. 10 and
ZOD34K3E and ZOD104KCE added.
Pg. 5 Regulatory Compliance reference updated.
Pg. 5 ZO104KCE data updated.
Pg. 5 High-pressure relief valve settings changed.
Pg. 6 Modified low pressure cut.
Pg. 7 Charging Procedures changed
Pg. 9 Maintenance and Repair section added
© 2017 Emerson Climate Technologies, Inc.
Subcritical Refrigeration (R-744)
2

TABLE OF CONTENTS

Motor Protection ....................................................... 6
Operating Envelope .................................................. 7
Charging Procedure ................................................. 7
Deep Vacuum Operation .......................................... 7
Shell Temperature .................................................... 7
Low Pressure Safety Control .................................... 7
Minimum Run Time .................................................. 7
ASSEMBLY LINE PROCEDURES ............................... 8
Installing the Compressor ......................................... 8
Assembly Line Brazing Procedure ........................... 8
New Installations ...................................................... 8
'Hipot' (AC High Potential) Testing ........................... 8
MAINTENANCE AND REPAIR .................................... 9
Service Procedures .................................................. 9
FIGURES
Figure 5 Three Phase Power Circuit .......................... 14
Pg. 10 Table of AE-Bulletins and documentation
related with this Bulletin.
Pg. 10 Nomenclature details added.
Pg. 10 Oil and Refrigerant table added
Pg. 10 Crankcase kit table added
Pg. 11 OMC CO2 Specification Chart added
Pg. 11 Drawing of Subcritical DX System changed.
Pg. 11 and Pg. 12 Mounting parts drawings added.
Pg. 11 Oil Management drawing added
Pg. 13 Pressure Relief Valve drawing changed.
Pg. 14 Operating Envelop changed.
1
December 2017

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Summary of Contents for Emerson Copeland Scroll ZO21K5E

  • Page 1: Table Of Contents

    Pg. 6 Modified low pressure cut. Pg. 11 Oil Management drawing added Pg. 7 Charging Procedures changed Pg. 13 Pressure Relief Valve drawing changed. Pg. 9 Maintenance and Repair section added Pg. 14 Operating Envelop changed. © 2017 Emerson Climate Technologies, Inc.

  • Page 2: Safety Instructions

    NOTICE is used to address practices not related to personal injury. CAUTION, without the safety alert symbol, is used to address practices not related CAUTION to personal injury. FLAMMABLE PRESSURE indicates a dangerous proximity to high pressure section of the system. © 2017 Emerson Climate Technologies, Inc.

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

    Only qualified and authorized HVAC or refrigeration personnel are permitted to install commission and maintain this equipment. • Electrical connections must be made by qualified electrical personnel. • All valid standards and codes for installing, servicing, and maintaining electrical and refrigeration equipment must be observed. © 2017 Emerson Climate Technologies, Inc.

  • Page 4: Introduction

    (R-744) for a subcritical 34K = Nominal Capacity (KBTU/HR) operation. For additional information, please refer to the Model variation online product information accessible from the Emerson Oil type: POE oil website at Emerson.com/OPI. TFD = Electrical Description: T= Three Phases...

  • Page 5: Safety Relief Valves

    Active Oil Management 2. This flow path cannot be shut off in any way by a valve. An OMC CO2 electronic oil level management system should be used that is suitable for both high and low- © 2017 Emerson Climate Technologies, Inc.

  • Page 6: Accumulators

    The compressor terminal box has a wiring diagram on Motor Protection the inside of its cover. Before connecting the For the ZO range of compressors, conventional inherent compressor, ensure the supply voltage, the phases and internal line break motor protection is provided. © 2017 Emerson Climate Technologies, Inc.

  • Page 7: Operating Envelope

    The scroll compressor can be used to pump down refrigerant Emerson recommends a maximum of 10 starts per hour. in a unit as long as the pressures remain within the There is no minimum off time because scroll operating envelope.

  • Page 8: Assembly Line Procedures

    AE4-1372 R4 • tube (available from Emerson) and install it in a system Be sure suction tube fitting I.D. and suction tube with the longest connecting lines that are approved for O.D. are clean prior to assembly. If oil film is the system.

  • Page 9: Maintenance And Repair

    Online Product Information at rise to normal levels, reverse any two of the Emerson.com/OPI, refer to the Application Engineering compressor power leads and reapply power to bulletins listed below, or contact your Application make sure the compressor was not wired to run in Engineer.
  • Page 10 480V, 70W, 48” Lead Length 918-0043-01 ZO88KCE 018-0095-06 575V, 70W, 48" Lead Length 918-0043-02 ZO104KCE 018-0095-07 120V, 70W, 48" Lead Length 918-0043-07 ZOD104KCE 018-0095-08 400V, 70W, 48" Lead Length 018-0095-09 277V, 70W, 21" Lead Length © 2017 Emerson Climate Technologies, Inc.

  • Page 11: Figure 1 Co2 Low Temp. Subcritical Dx System

    -40° to 120°F (-40°C to 48.9°C) Maximum Ambient Temperature - Storage -40° to 120°F (-40°C to 48.9°C) Maximum Ambient Temperature - Intermittent Duty 1/4" Male SAE Oil Supply Fitting (Brass) Figure 1 CO2 Low Temp. Subcritical DX System © 2017 Emerson Climate Technologies, Inc.

  • Page 12: Figure 2 Specially Designed Rubber Grommets Kit # 527-0157-00

    AE4-1372 R4 Figure 2 Specially designed rubber grommets Kit # 527-0157-00 Figure 3 Oil Management Control OMC-CO2 © 2017 Emerson Climate Technologies, Inc.

  • Page 13: Figure 4 Suction Side Pressure Relief Valve

    AE4-1372 R4 Figure 4 Suction Side Pressure Relief Valve Requirements © 2017 Emerson Climate Technologies, Inc.

  • Page 14: Figure 5 Three Phase Power Circuit

    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.

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