scope:

This standard applies to electric motor driven, single and variable capacity, single and two stage Positive Displacement Refrigerant Compressors and Compressor Units operating with carbon dioxide in both Subcritical and Transcritical applications for refrigeration. This standard also applies to the presentation of performance data for Positive Displacement Compressors and Compressor Units operating with carbon dioxide.

Refrigerant. The rating points in this standard are based on R-744 (carbon dioxide).

Purpose. The purpose of this standard is to establish for positive displacement carbon dioxide refrigerant compressors and compressor units: definitions; test requirements; rating requirements; minimum data requirements for Published Ratings; operating requirements; marking and nameplate data and conformance conditions.

Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users.

Review and Amendment. This standard is subject to review and amendment as technology advances.