AMCA Publication

Transcription

1 AMCA Publication Certified Ratings Program - Product Rating Manual for Airflow Measurement Stations AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL, INC. The International Authority on Air System Components

2 AMCA Publication Certified Ratings Program Product Rating Manual for Airflow Measurement Stations Air Movement and Control Association International 30 W. University Drive Arlington Heights, Illinois 60004

3 AMCA Publications Authority AMCA International Publication 611 was approved by the membership of the Air Movement and Control Association International, Inc. on May 2, Copyright 2010 by Air Movement and Control Association International, Inc. All rights reserved. Reproduction or translation of any part of this work beyond that permitted by Sections 107 and 108 of the United States Copyright Act without the permission of the copyright owner is unlawful. Requests for permission or further information should be addressed to the Executive Director, Air Movement and Control Association International, Inc. at 30 West University Drive, Arlington Heights, IL U.S.A. Objections Air Movement and Control Association International, Inc. will consider and decide all written complaints regarding its standards, certification programs, or interpretations thereof. For information on procedures for submitting and handling complaints, write to: Air Movement and Control Association International 30 West University Drive Arlington Heights, IL U.S.A. AMCA International, Incorporated c/o Federation of Environmental Trade Associations 2 Waltham Court, Milley Lane, Hare Hatch Reading, Berkshire, United Kingdom RG10 9TH Disclaimer AMCA uses its best efforts to produce standards for the benefit of the industry and the public in light of available information and accepted industry practices. However, AMCA does not guarantee, certify or assure the safety or performance of any products, components or systems tested, designed, installed or operated in accordance with AMCA standards or that any tests conducted under its standards will be non-hazardous or free from risk.

4 Review Committee Dean DeBaun Committee Chair Marty Gissel Michael Khoury Jim Maciupa Bob Van Becelaere Tim Orris Air Monitor Corporation Greenheck Fan Corporation Paragon Controls, Inc. Ultratech Industries, Inc. Ruskin Company AMCA International Staff

5 Related AMCA Documents Related Publications AMCA Publication 11 AMCA Publication 600 Damper Application Manual for Heating/ Ventilating, and Air Conditioning Application Manual for Airflow Measurement Stations Related Standards ANSI/AMCA Standard 610 Laboratory Methods of Testing Airflow Measurement Stations for Performance Rating

6 Contents 1. Introduction Purpose and Scope Definitions and Symbols Guidelines for Developing Airflow Measurement Station Ratings Testing requirements Calculated performance Published performance ratings Required statement(s) Check Test General requirements Check test tolerance Annex A Update Requirements for Approved and New Catalogs (Normative)

7

8 Certified Ratings Program Product Rating Manual for Airflow Measurement Stations 1. Introduction This publication is an extension of the AMCA Certified Rating Program. Information on the operation of the Program is given in AMCA Publication 11 Certified Ratings Program Operating Manual. 2. Purpose and Scope The purpose of this document is to prescribe and establish procedures to be used in the development and publication of certified performance ratings for airflow measurement stations. Certified ratings provide assurance to the buyer, user, and specifier that the manufacturer s published performance ratings for airflow measurement stations are repeatable; information on how the product was tested; what appurtenances (accessories or optional equipment) were accounted for in the ratings; and other pertinent information. This standard provides a procedure for verification of the manufacturer s performance ratings on a regular schedule through check-testing of products in the AMCA International Laboratory. This standard provides assurance that competitive ratings are comparable at the point where the output data is acquired, and that they are based on standard test methods on ratings procedures. This program applies to products or systems that output either analog electronic (E) or non-electronic (NE) signals. A non-electronic output is considered analog differential pressure, which requires additional hardware to convert differential pressure to an electronic signal. 3. Definitions and Symbols 3.1 Airflow Measurement Station (AMS) A multiple-point sensing device used to measure the airflow in a duct and which consists of a single or multiple arrays of sensors in permanent position across a duct system. For the purposes of this Certified Ratings Program, an AMS shall be classified as one of the two following Installation Types: AMS In casing 3.2 AMS Differential (velocity) pressure output type Converts air velocity into a differential (velocity) pressure signal that correlates to the velocity or volume of air flowing through a duct. 3.3 AMS Electronic output type Converts air velocity into an electronic signal that correlates directly and proportionately to the air volume flowing through a duct. 3.4 Test reference airflow rate The calculated airflow rate at measurement plane. 3.5 AMS Performance variables AMS Airflow rate The airflow rate, based upon the output (pressure, current or voltage of the AMS under test), calculated according to the manufacturer s instructions AMS Differential pressure The observed differential pressure between the high-pressure output and the low-pressure output of a differential pressure type AMS AMS Electronic output The observed voltage or current output of an electronic output type AMS that correlates directly and proportionately to the velocity of airflow in a duct Face area of AMS The unobstructed area at the inlet (or outlet) of the AMS. 3.6 Shall and should The word shall is to be understood as mandatory and the word should as advisory. 3.7 Point of operation The point of operation is the relative position on the AMS input versus output curve corresponding to a particular airflow rate. It is controlled during a test by adjusting the position of the throttling device, by changing the nozzles or auxiliary fan characteristics, or by any combination of these. 3.8 Determination A test determination is a complete set of measurements at the AMS under test and of the reference airflow system, for one operational airflow test rate. AMS Insertion type AMCA

9 4. Guidelines for Developing Airflow Measurement Station Ratings 4.1 Testing requirements The performance rating of an airflow measurement station (AMS) shall be developed from a test or tests conducted in accordance with ANSI/AMCA 610 or other test standard recognized in AMCA Publication 111. The manufacturer is responsible for determining the product size to be tested and the test figures that must be utilized to provide the data necessary for the development of certified ratings for each AMS size. 4.2 Calculated performance Catalog performance rating A catalog performance rating is a statement of the reference airflow rate, the percent total relative accuracy of the AMS with respect to the reference airflow rate observed at the AMCA Laboratory, and airflow resistance for each of the six points in the range of the test per ANSI/AMCA Standard 610. The performance rating is applicable only to the product configuration tested, including any appurtenances included with the AMS as tested, up to the input terminals of the data processing equipment Similarity The AMCA-verified ratings of one size of AMS may be used to certify the ratings of other aerodynamically similar AMS units within the range of 50% to 200% of the nominal area of the test size. 2 AMCA

10 4.3 Published performance ratings Basic information The following information shall be included: Model Installation type (station or insertion probe) Operational type (differential pressure, electronic output, etc.) Manufacturer s conversion formula, as applicable Size and shape tested, and applicable sizes rated ANSI / AMCA 610 test setup figure(s) Performance data The following performance data, in tabular form, for each of the six test points, and for each test setup figure: Reference airflow Percent accuracy of AMS to reference airflow 4.4 Required statement(s) Licensed product statement In catalogs containing ratings or licensed products, the following statement shall be printed prominently and immediately adjacent to the reproduction of the AMCA Certified Ratings Seal: [Licensee name] certifies that the [product designation] shown hereon [or herein] is licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 611 and comply with the requirements of the AMCA Certified Ratings Program Appurtenances statement When the effect of one or more appurtenances is included in the AMS performance, the following statement shall be shown: Performance ratings include the effect of [list appurtenance here] in the airstream. Airflow resistance AMCA

11 5. Check Test 5.1 General requirements Licensed products are subject to periodic check tests as defined in AMCA International Publication 11. When products are check-tested, the check test accuracy performance shall be within the tolerance, as defined in Section 5.2, when compared with the catalog data published by the manufacturer. The check test tolerance allowed on AMS performance is based on the typical uncertainties and variations due to manufacturing dimensional tolerances that can be experienced in an AMS performance test conducted under laboratory conditions. Since both the original test used to develop the cataloged data and the check test have similar uncertainties, the AMCA tolerance allows for the combined uncertainties of the two tests. 5.2 Check test tolerance Airflow measurement For airflow measurement, the check test results for an AMS of less than m 2 (2 ft 2 ) face area shall not deviate by more than ±3.0% from the cataloged accuracy for the operating range. The check test results for an AMS of m 2 (2 ft 2 ) or greater shall not deviate more than ±2.0% from the cataloged accuracy for the operating range Airflow resistance For airflow resistance, the airflow at any rated pressure differential shall not be less than 90.0% of the rated airflow. 4 AMCA

12 Annex A Update Requirements for Approved and New Catalogs (Normative) New catalogs shall adhere to the requirements of this program starting on this publication s effective date. Approved catalogs shall be revised to adhere to the requirements of this program within three years of this publication s effective date. AMCA

13 AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL, INC. 30 West University Drive Arlington Heights, IL U.S.A. Tel: (847) Fax: (847) info@amca.org Web: The Air Movement and control Association International, Inc. is a not-for-profit international association of the world s manufacturers of related air system equipment primarily, but limited to: fans, louvers, dampers, air curtains, airflow measurement stations, acoustic attenuators, and other air system components for the industrial, commercial and residential markets.