© 2017 Emerson Climate Technologies, Inc.
1
TABLE OF CONTENTS
Safety Instructions ....................................................... 2
Safety Icon Explanation ........................................... 2
Safety Statements .................................................... 3
Introduction .................................................................. 4
For Low Temperature Applications Sub-Critical
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
Motor Protection ....................................................... 6
Operating Envelope .................................................. 7
Charging Procedure ................................................. 7
Deep Vacuum Operation .......................................... 7
Shell Temperature .................................................... 7
Pump Down Cycle and Parallel Rack Application .... 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
Compressor Replacement After a Motor Burn ......... 9
General Guidelines and More Information ............... 9
FIGURES
Figure 1 CO2 Low Temp. Subcritical DX System ...... 11
Figure 3 Oil Management Control OMC-CO2 ............ 12
Figure 5 Three Phase Power Circuit .......................... 14
Figure 6 ZO Compressor Operating Envelope ........... 14
Figure 7 Compressor Electrical Connection ............... 14
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
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.
Copeland Scroll™ Compressors for CO
2
Subcritical Refrigeration (R-744)
December 2017
AE4-1372 R4
