ARI 880-2008 Performance Rating of Air Terminals.pdf
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1、 2008 Standard for Performance Rating of Air Terminals ARI Standard 880 Copyright Air-Conditioning, Heating and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Price $12.00 (M) $25.00 (NM) Printed in U.
2、S.A. Copyright 2008, by Air-Conditioning, Heating and Refrigeration Institute Registered United States Patent and Trademark Office IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, tested, rate
3、d, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/
4、 guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. ARI CERTIFICATION PROGRAM PROVISIONS
5、Scope of the Certification Program The certification program includes all Air Terminals as defined in Section 3. Exclusion: This certification program does not apply to the rating and testing of retrofit units. Certified Ratings The following certification program ratings are verified by test at the
6、 standard rating conditions (Section 7.2): Primary Airflow, cfm m3/s Induced or Fan Airflow, cfm m3/s Electrical Power Input, watts W Minimum Operating Pressure, in H2O kPa Radiated Sound Power Level, dB (125 to 4000 Hz octave band) Discharge Sound Power Level, dB (125 to 4000 Hz octave band) USE OF
7、 THE SOUND RATINGS Sound power level data generated by use of this standard with air terminals are directly applicable to ARI Standard 885, a procedure for using published sound ratings in the estimating of sound levels in occupied spaces. Note: This Standard supersedes ARI Standard 880-1998. Forewo
8、rd Units tested and rated in accordance with ARI Standard 880 are required to be tested in a reverberation room that meets the broadband requirements of ARI Standard 220. Units certified in accordance with the ARI Standard 880 Certification Program are required to be verified by a test in a reverber
9、ation room that meets both the broadband and pure tone qualification requirements of ARI Standard 220. Copyright Air-Conditioning, Heating and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE OF CO
10、NTENTS PAGE Section 1. Purpose 1 Section 2. Scope . 1 Section 3. Definitions . 1 Section 4. Symbols . 5 Section 5. Classifications . 6 Section 6. Test Requirements . 6 Section 7. Rating Requirements . 7 Section 8. Minimum Data Requirements for Published Ratings 10 Section 9. Marking . 11 Section 10.
11、 Voluntary Conformance . 11 TABLES Table 1. Octave Band Center Frequencies 3 Table 2. Symbols . 5 Table 3. Expression of Airflow Rates . 8 Table 4. Minimum Significant Sound Power Levels 8 Table 5. Recommended Inlet Airflow . 9 Table 6. Discharge/Radiated Sound Power Level Standard Rating Conditions
12、 9 Table 7. Sound Power Level Rating Tolerances . 10 FIGURES Figure 1. Air Terminal and Air Outlet Configuration 4 Figure 2. Acoustically Isolated Duct 7 Figure 3. Acoustically Isolated (Lagged) Duct . 7 Copyright Air-Conditioning, Heating and Refrigeration Institute Provided by IHS under license wi
13、th ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-APPENDICES Appendix A. References Normative 12 Appendix B. References Informative 12 Copyright Air-Conditioning, Heating and Refrigeration Institute Provided by IHS under license with ARI Not for ResaleNo repro
14、duction or networking permitted without license from IHS-,-,-ARI STANDARD 880-2008 1 PERFORMANCE RATING OF AIR TERMINALS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Air Terminals: definitions; classifications; test requirements; rating requirements; minimum data
15、requirements for Published Ratings; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment. This standard is subject to review
16、and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to air control devices used in air distribution systems. These devices provide control of air volume with or without temperature control by one or more of the following means and may or may not include a fan: a.
17、Fixed or adjustable directional vanes (i.e. Bypass Air Terminal) b. Pressure dependent volume dampers or valves (including air induction nozzles and Dampers) c. Pressure compensated volume dampers or valves (including air induction nozzles and Dampers) d. Integral heat exchange e. On/off fan control
18、 f. Variable speed fan control g. Integral Diffuser Air Terminals 2.2 Exclusions. This standard does not apply to registers, diffusers and grilles or to products specifically covered by ARI Standard 410 or ARI Standard 440. Section 3. Definitions All terms in this document follow the standard indust
19、ry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning, and Refrigeration unless otherwise defined in this section. 3.1 Acoustically Isolated. The specimen under test shall have a sound pressure level at least 10 dB higher than any extraneous sound sour
20、ces, such as sound generated from the air supply or duct walls, to insure that the test specimen is the sole contributor to the sound level being measured. 3.2 Air. 3.2.1 Primary Air. Air supplied to an air terminal inlet under positive static gage pressure, normally from an air handling unit. 3.2.2
21、 Secondary Air. Air drawn into an Air Terminal by means of induction and discharged through the air terminal outlet. 3.2.3 Standard Air. Air weighing 0.075 lb/ft3 1.2 kg/m3 which approximates dry air at 70F 21C and at a barometric pressure of 29.92 in Hg 101.3 kPa. 3.3 Airflow. Unit volume displacem
22、ent of standard air per unit time, cfm m3/s. The various types of airflow are defined as follows: 3.3.1 Induced Airflow. The flow of secondary air into an Air Terminal resulting from a pressure differential within the terminal. Copyright Air-Conditioning, Heating and Refrigeration Institute Provided
23、 by IHS under license with ARI Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STANDARD 880-2008 2 3.3.2 Rated Airflow. The flow of air through an Air Terminal at which test or performance data is generated. 3.3.3 Standard Airflow. Airflow corrected for standar
24、d air density. Qs = Qa (a/s) 3.4 Air Terminal (Terminal). A device that modulates the volume of air delivered to or removed from a defined space in response to an external demand (Figure 1). The various types of Air Terminals are: 3.4.1 Bypass Air Terminal. Air Terminal, typically having more than o
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