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ANSI/ASHRAE Standard 127-2020, Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners

ASHRAE

The ASHRAE method-of-test standard for rating computer room air conditioners (CRAC); the 2020 edition is incorporated by reference in the US DOE CRAC test procedure.

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Overview

ANSI/ASHRAE 127-2020 is a method-of-test standard for rating computer and data processing room unitary air conditioners (CRAC). Because it is a paid standard, this record rests only on metadata from publisher pages and fact sheets; the standard has not been read. The record's link points to the IIR FRIDOC catalogue record, which may describe an earlier edition. The standard is listed with product code 86408 in the Datacom Series entries of the ASHRAE Annual 2024 Publications Catalog.

It is listed at $75 ($56 for ASHRAE members). The 2020 edition is incorporated by reference in the US Department of Energy (DOE) computer room air conditioner test procedure. This shows that the standard is not only an industry method but part of a regulatory test framework. Related documents include AHRI 1360 and 10 CFR 431.96.

Information on earlier editions is as follows: the 2012 edition superseded 127-2007 and set uniform requirements for rating computer room unitary air conditioners. According to the IIR FRIDOC record, the appendices of the 2012 edition include an airflow and static pressure test procedure for downflow units and climate-zone bin data with population weighting. The 2019 ASHRAE Handbook-HVAC Applications, Chapter 20, references the 127-2012 edition in its references.

The limit of the record is that it gives no detail on the content of the 2020 edition: test conditions, measurement tolerances and rating formulas are not here. The source should be used to show which test method CRAC units are rated against and which regulatory documents that method is tied to; for the test conditions behind efficiency and capacity values, the full text of the standard must be consulted.

Key points

  1. Standard 127-2020 is listed with product code 86408.
  2. Listed at $75 ($56 for ASHRAE members) in the ASHRAE Annual 2024 Publications Catalog.
  3. The 2012 edition superseded 127-2007 and set uniform requirements for rating computer room unitary air conditioners.
  4. 2012 edition appendices include an airflow/static pressure test procedure for downflow units and climate-zone bin data with population weighting.
  5. The 2019 Handbook-HVAC Applications, Ch. 20, references the 127-2012 edition.
  6. The 2020 edition is incorporated by reference in the US DOE CRAC test procedure.

Using it in design

  • In the CRAC catalogue, record rated capacity and efficiency (NSenCOP) on the basis of AHRI 1360 / ASHRAE 127 test conditions.
  • When comparing efficiencies from different manufacturers, verify that they rest on the same test conditions.
  • State in the record which edition is the basis.

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Who should read it

Designers and procurement teams selecting CRAC and computer room air conditioners and comparing rating data.

Related standards

  • AHRI 1360
  • 10 CFR 431.96

Publication details

Authors
ASHRAE
Publisher
ASHRAE
Year
2020
Document number
ANSI/ASHRAE 127-2020 (product 86408)
Document language
English
Source type
Standard
Access
Citation only
Licence
Copyright retained; citation only — the publisher’s terms apply to the original document
Original licence note

Copyrighted standard sold by the publisher. Not read; metadata from publisher pages/fact sheets only. Citation only.

Citation

ASHRAE (2020). ANSI/ASHRAE Standard 127-2020, Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners. ASHRAE. ANSI/ASHRAE 127-2020 (product 86408). https://iifiir.org/en/fridoc/method-of-testing-for-rating-computer-and-data-processing-room-unitary-4377

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All content and rights belong to the respective authors and publishers. SoSo CAD provides only the citation, its own summary and a link to the source, and is not responsible for the sources' content.