Performance certification and Standards

Diligent readers of Section 17.10.2 will have perceived a certain disappointment of the author that the CAME Scheme did not come to full fruition. Some colleagues in the industry were even more damning in their condemnation of all things governmen­tal. They felt that they had gone along with the requirement for quality assurance but had not been given Performance Certifi­cation in return. All the good work completed by the National Engineering Laboratory (NEL) in the production of the rules for the CAME Scheme had been a wasted effort.

The situation in the United States could not have been more dif­ferent. Unlike the scheme developed in the UK, they had a pri­vate programme produced by the manufacturers without gov­ernment support or interference. The trade body, AMCA (Air Movement & Control Association International) had developed its own approach and widely publicised it. Indeed the author’s company joined in 1976. We had been told in no uncertain terms by the customer in the USA that the order was ours pro­vided we achieved AMCA Certification for the relevant products. We did, and we got it!

In more recent times, the European Committee of Air Handling and Refrigeration Equipment Manufacturers (Eurovent/ Cecomaf), decided that the time was ripe for a similar scheme in Europe. Many of its manufacturers however, had in the meantime joined the AMCA Scheme and insisted that reciproc­ity between the two programs was essential. A memorandum of understanding between AMCA and Eurovent Certification Company (ECC) was signed by the author (then AMCA Presi­dent) and Alan Duttine (ECC Chairman) in late 2003.

It is hoped that there soon will be global performance certifica­tion scheme for fans to assure customers that what they are buying (airflow and pressure) is what they will get. In the mean­time customers should look for the AMCA Seal if they wish to have performance assured to close tolerances. Failing this they should consider a witnessed performance test.

The AMCA programme, in the absence of any other scheme at present, is considered so important that it is detailed fully in the following Section.

AMCA International Certified Ratings Programme

Purpose

• To provide the buyer, user and specifier assurance that the manufacturer’s published performance ratings of air mov­ing equipment are reliable and accurate, and further, to pro­vide these parties with information on how the product was tested, what appurtenances were included, and other perti­nent information so that they may be able to select a fan that will provide the performance required.

• To provide a procedure for verification of the manufacturer’s performance ratings on a regular schedule by check-testing of the certified product line in the AMCA Laboratory.

• To provide assurance that competitors’ ratings are based on standard test methods and ratings procedures.

Scope

Products that can be licensed by AMCA to bear the AMCA Cer­tified Ratings Seal are centrifugal fans, axial fans, power roof ventilators, air curtains, agricultural fans and other air moving devices within the product scope of AMCA.

The programme applies only to complete air moving devices, and is not applicable to component parts such as fan impellers or impellers and housings.

The programme applies to fans within the scope of AMCA for which performance rating catalogues are published and made available to the public. When only a portion of a catalogued se­ries of sizes are licensed, at least a majority of the sizes cata­logued may be licensed. It does not apply to special units for which performance ratings are not published. When perfor­mance ratings for both licensed and unlicensed products are contained in the same catalogue, there must be a clear distinc­tion made between licensed and unlicensed products.

When one or more licensed products are used as component parts of a larger unit, the AMCA Certified Ratings Seal may not be applied to the complete unit unless the complete unit has been itself licensed in accordance with this programme.

Administration

The administration of the Certified Ratings Programme is the responsibility of the Executive Director.

Responsibilities

The AMCA staff is responsible for administering the Certified Ratings Programme in accordance with the requirements set out. They will verify that the air performance ratings developed by the manufacturer were developed in accordance with the re­quirements of the programme, conduct pre-certification test(s) to confirm the licensee’s test results, and conduct check tests of the licensee’s products as required by this programme.

The AMCA staff is also responsible for verifying that the cata­logue published by the licensee conform to the requirements of the programme.

Definitions

1 ) AMCA is the Air Movement and Control Association Inter­national Inc., a non-profit corporation organized under the laws of the state of Michigan, USA, having its principal of­fice at 30 West University Drive, Arlington Heights, Illinois 60004, USA.

2) The AMCA Certified Ratings Programme Air Performance is a programme “for certifying a product’s aerodynamic performance rating”, as defined in AMCA Publication 211.

3) An AMCA Registered Laboratory is a laboratory that has been registered in accordance with AMCA Publication

111. A registered laboratory may be owned and operated by certified ratings licensees or by an independent individ­ual or organization.

4) The AMCA Laboratory is the Association’s laboratory in Arlington Heights, Illinois.

5) Other independent registered laboratories may be desig­nated as an AMCA Laboratory by the Board of Directors for the purposes of performing pre-certification tests, check tests and challenge tests.

6) A Certified Rating is a published performance rating of a product that the manufacturer or seller of the product certi­fies has been tested and rated in accordance with the re­quirements of the AMCA Publication 21 and that has been licensed by AMCA to bear the AMCA Certified Rating Seal.

7) The license is a legal contract between AMCA and a per­son, firm or corporation which authorizes participation in the AMCA Certified Ratings Programme and the affixing of the AMCA Certified Rating Seal to products listed in the appendices of the license. A separate Appendix to the li­cense will be issued for each certified product line.

8) A Licensee is a person, firm, or corporation that entered into a License Agreement to certify the ratings of a product

Or products with AMCA in accordance with the require­ments of this programme.

9) The AMCA Certified Ratings Seal (the Seal) is a regis­tered trademark of the Association which can be applied to products to indicate that the product is licensed by AMCA to bear this seal. The seals are the property of AMCA and may be used only on the particular product of the Licensee listed in the appendices of the License Agreement. Repro­ductions of the AMCA Certified Ratings Seal may be used in catalogues and other publications only as permitted by Section 10 of this Certified Ratings Programme.

10) A product line is a series of product sizes, or an individual product where only one size is offered for sale, with a com­mon design purpose and generally similar aerodynamic features, but not necessarily aerodynamically similar, that are catalogued under the same product description or name and/or identifying reference and that are within the scope of this programme.

11) The performance rating of a product is a statement of the airflow versus pressure performance of the product at a given speed and fan shaft power or motor input power at standard inlet air density for a printed catalogue, or at a specified density for an electronic catalogue. The rating may be published in tabular and/or graphical format. Spe­cific performance rating requirements are given in the Product Rating Requirement Subsections A through H of AMCA 211.

12) A catalogue for the purpose of this programme is defined as a printed document that contains the dimensional data and performance ratings of a product line, and that meets the other requirements of the Certified Ratings Programme. It is also defined as an electronic media (computer disk) that provides performance data for a li­censed product.

13) Catalogue data is the performance rating of each model of the product line in the specific format that is to be pub­lished.

14) Test data is a record of airflow, pressure, speed, density and power as measured for each test point of operation, as well as the data reduced to standard density and con­stant speed, where applicable.

15) A licensed product is a product that has met the require­ments of this programme and for which an appendix to the License Agreement listing the product identification has been issued.

16) The Directory of Licensed Products is AMCA Publication

261 which lists all products that are currently licensed by AMCA to bearthe Certified Ratings Seal date of issue. Ag­ricultural products are listed in AMCA Publication 262.

Procedure for participation

Eligible parties participate in the AMCA Certified Ratings Programme by first entering into a Certified Ratings Programme License Agreement with AMCA. Thereafter, any individual product line may be licensed to bear the AMCA Certi­fied Ratings Seal after the requirements of this programme are met, and an appendix to the License Agreement has been is­sued by AMCA for the product line.

In general, the steps shown in Table 17.2 will need to be com­pleted in order for a product line to become licensed to bear the AMCA Certified Ratings Seal.

Steps

Description

Responsibility

A

Test the product(s) to be licensed

Applicant

B

Apply for a product line license

Applicant

C

Submit the required data

Applicant

Steps

Description

Responsibility

D

Staff review of submitted data

AMCA

E

Conduct the pre certification check test

AMCA

F

Submit proposed catalogue data

Applicant

G

Staff review of proposed catalogue data

AMCA

H

Issue of notice of acceptability for license

AMCA

I

Submit proof copy of catalogue

Applicant

J

Staff review of catalogue proof copy

AMCA

K

Submit finished catalogue

Applicant

L

Staff review of catalogue and issuing of license

AMCA

Table 17.2 AMCA licence procedure

Licence procedure for similar products

Manufacturers of a product line or lines that are aerodynami­cally similar to a product already licensed by the manufacturer may apply for an AMCA Certified Ratings Seal by submitting two copies of form CRP-A and sufficient dimensional data to verify the products are in fact aerodynamically similar.

The AMCA staff will review the application and notify the appli­cant if any changes or further required information is required to comply with this programme. Once aerodynamic similarity has been verified by AMCA, the applicant should follow the proce­dure in Table 17.2.

Requirements for maintaining the certified rat­ings license

The licensee is responsible for maintaining conformance to the requirements of the Certified Ratings Programme by submit­ting new or revised catalogues to AMCA for review prior to pub­lication, and by control of manufacturing procedures to ensure that the product as manufactured will perform in accordance with its published ratings, within the tolerances allowed for the product as defined. Products should be submitted for check tests.

The purpose of a check test is to ensure that the air perfor­mance of the as manufactured unit remains consistent with the ratings originally certified.

Each licensed product line will be subject to a check test within 36 months of license issue and within 36 month periods thereaf­ter under a continuing license. In the event that the data submit­ted with the original application was obtained on a preproduction sample (prototype), the first check test is re­quired within 12 months of license issue, and within 36 month periods thereafter under a continuing license.

AMCA staff will be responsible for selecting a suitable product sample. The sample may be obtained from the Licensee or by purchase on the open market, when appropriate.

AMCA Certified Ratings Seal

The Seal is a registered trademark of AMCA which may be af­fixed to a licensed product or reproduced by the Licensee in cat­alogues and other publications, as permitted by the document.

The AMCA Certified Ratings Seal applies to the AMCA Certified Ratings for air performance only.

In order to certify the sound performance of any device, all the requirements of AMCA Publication 311 must be met. A sepa­rate Seal for air and sound is available for products that also meet the requirements of Publication 311.

Catalogues and publications

In order to comply with the programme, the Licensee should publish a catalogue which identifies the product and may in­clude descriptions, photographs or renderings of the product, and contains the AMCA Certified Ratings Seal, qualifying state­ment(s) and performance ratings. Performance ratings should be developed in accordance with the applicable product rating requirements.

Challenge test procedure

Any person, firm, or corporation, whether a member of AMCA or not, may challenge the performance of a licensed product by requesting that a check test be performed in the AMCA Labora­tory under the following conditions:

• The test unit to be provided by the challenging party at no cost to AMCA.

• Test data obtained in an AMCA Registered Laboratory or the AMCA Laboratory, showing that the test unit does not perform within the specified performance tolerances for the product being tested, to accompany the request for a chal­lenge test.

• The request to be made in writing to the AMCA Executive Director with a copy to the Licensee.

• The challenging party, by making a request for a challenge test, agrees to all applicable provisions of the Certified Rat­ings Programme.

Directory of licensed products

AMCA Publication 261 and AMCA Publication 262 are pub­lished each year or at such other times as the Executive Com­mittee authorizes. They will list all products that are licensed to use the AMCA Certified Ratings Seal at the date of publication and identify the latest approved catalogue containing the rat­ings of each licensed product.

Appeals and settlements of disputes

If the applicant or Licensee does not agree with the administra­tion or interpretation of the requirements of the scheme by the AMCA staff, or if they want to request additional time beyond what is allowed to correct a violation, they may appeal to the Ex­ecutive Committee of the AMCA Board by written request di­rected to the Executive Director.

In the event that agreement cannot be reached between the Executive Committee and the appealing party, the appeal will be put before the AMCA Board of Directors and the decision of the Board will be considered final.

Comments

These paragraphs are of necessity only a brief resumee of the AMCA Scheme. They contain those parts of the programme considered of importance to manufacturers and users.

The Scheme is industry based — but there are no more vigilant interrogators than one’s peers in the industry, i. e. one’s compet­itors!

Posted in Fans Ventilation A Practical Guide


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