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4	FOREWORD FOREWORD Definitions Definitions Rating Requirements Rating Requirements 1. PURPOSE 1. PURPOSE 2. SCOPE 2. SCOPE 3. DEFINITIONS 3. DEFINITIONS
5	4. CLASSIFICATION 4. CLASSIFICATION 4.1 Normally, CDPR units within the scope of this standard can be classified as shown below. There are five basic types of unitary air conditioners: 4.1 Normally, CDPR units within the scope of this standard can be classified as shown below. There are five basic types of unitary air conditioners: 5. RATING REQUIREMENTS 5. RATING REQUIREMENTS 5.1 Cooling System Standard Ratings and Sensible Cooling Efficiency Rating (SCOP). Standard rating capacity shall be established… 5.1 Cooling System Standard Ratings and Sensible Cooling Efficiency Rating (SCOP). Standard rating capacity shall be established…
7	5.2 Adjusted Sensible Rating (ASCOP) Calculation 5.2 Adjusted Sensible Rating (ASCOP) Calculation 5.3 Part-Load Ratings. Part-load ratings may be included as application ratings at the manufacturer’s option. 5.3 Part-Load Ratings. Part-load ratings may be included as application ratings at the manufacturer’s option. 5.4 Reheating System Standard Ratings. Standard ratings shall be established at the rating conditions specified in Table 1. Rehe… 5.4 Reheating System Standard Ratings. Standard ratings shall be established at the rating conditions specified in Table 1. Rehe… 5.5 Humidification and Dehumidification System Standard Ratings. Standard Ratings shall be established at the rating conditions specified in Table 1. 5.5 Humidification and Dehumidification System Standard Ratings. Standard Ratings shall be established at the rating conditions specified in Table 1.
8	5.6 Air Filter Standard Ratings. Published air filter ratings shall be those defined in ASHRAE Standard 52.1-1992, Gravimetric a… 5.6 Air Filter Standard Ratings. Published air filter ratings shall be those defined in ASHRAE Standard 52.1-1992, Gravimetric a… 5.7 Application Ratings. Capacity ratings and ASCOP values at conditions of temperature, humidity, or altitude other than those … 5.7 Application Ratings. Capacity ratings and ASCOP values at conditions of temperature, humidity, or altitude other than those … 5.8 Publication of Ratings. Wherever application ratings are published or printed, they shall include or be accompanied by the s… 5.8 Publication of Ratings. Wherever application ratings are published or printed, they shall include or be accompanied by the s… 5.9 Method for the Measurement and Designation of Noise Emitted by Air Conditioners Used to Cool Computer Room and Data Processi… 5.9 Method for the Measurement and Designation of Noise Emitted by Air Conditioners Used to Cool Computer Room and Data Processi… 5.10 Capacity Designation. For air conditioners rated under this standard, the cooling system and dehumidification system capaci… 5.10 Capacity Designation. For air conditioners rated under this standard, the cooling system and dehumidification system capaci… 5.11 Tolerances. To comply with this standard, published cooling capacity ratings and power ratings shall be based on data obtai… 5.11 Tolerances. To comply with this standard, published cooling capacity ratings and power ratings shall be based on data obtai…
9	6. CONFORMANCE 6. CONFORMANCE 7. REFERENCES 7. REFERENCES
10	Normative Appendix A- Tests Required Normative Appendix A- Tests Required A1. Air-Cooled Units A1. Air-Cooled Units A1.1 Cooling capacity at condition Full Cooling A in Table 1. A1.1 Cooling capacity at condition Full Cooling A in Table 1. A1.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A1.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A1.3 Dehumidification capacity test. A1.3 Dehumidification capacity test. A1.4 Humidification capacity test. A1.4 Humidification capacity test. A2. Water-Cooled Units A2. Water-Cooled Units A2.1 Cooling capacity at condition Full Cooling A in Table 1. A2.1 Cooling capacity at condition Full Cooling A in Table 1. A2.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A2.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A2.3 Dehumidification capacity test. A2.3 Dehumidification capacity test. A2.4 Humidification capacity test. A2.4 Humidification capacity test. A3. Glycol-Cooled Units A3. Glycol-Cooled Units A3.1 Cooling capacity at condition Test A (Full Cooling) in Table 1. A3.1 Cooling capacity at condition Test A (Full Cooling) in Table 1. A3.2 Unit efficiency test at condition Test A (Full Cooling), B, C, and D in Table 1. A3.2 Unit efficiency test at condition Test A (Full Cooling), B, C, and D in Table 1. A3.3 Dehumidification capacity test. A3.3 Dehumidification capacity test. A3.4 Humidification capacity test. A3.4 Humidification capacity test. A4. Chilled-Water Units A4. Chilled-Water Units A4.1 Cooling capacity at condition Test A (Full Cooling) in Table 1. A4.1 Cooling capacity at condition Test A (Full Cooling) in Table 1. A4.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A4.2 Unit efficiency Full Cooling Test A, B, C, and D in Table 1. A4.3 Dehumidification capacity test. A4.3 Dehumidification capacity test. A4.4 Humidification capacity test. A4.4 Humidification capacity test.
11	Informative Appendix B- Dry-bulb Temperature Profiles for Selected Cities Informative Appendix B- Dry-bulb Temperature Profiles for Selected Cities
12	Normative Appendix C- Airflow and Static-Pressure Procedure for down-flow units Normative Appendix C- Airflow and Static-Pressure Procedure for down-flow units
13	Informative Appendix D- comparison of unit ratings using revised versus previous standard Informative Appendix D- comparison of unit ratings using revised versus previous standard

Published By	Publication Date	Number of Pages
ASHRAE	2007	15


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Standard Title	ASHRAE Standard 127-2007 Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners (ANSI Approved)
Published Code	ASHRAE
Publication Date	2007
Pages Count	15

ASHRAE 127 07:2007 Edition

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