1、1999 STANDARD for AIR-CONDITIONING ; rn d. Wopyright 1999, by Air-Conditioning and Refrigeration Institute Registered United States Patent and Trademark Offce Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking perm
2、itted without license from IHS-,-,-SECTION Section 1 . Section 2 . Section 3 . Section 4 . Section 5 . Section 6 . Section 7 . Section 8 . Section 9 . Figure 1 . Figure 2 . Figure 3 . Figure 4 . Figure 5 . Figure 6 . Figure 7 . TABLE OF CONTENTS PAGE Purpose 1 Scope 1 Definitions 1 Clssifications .
3、3 Test Requirements . 3 Rating Requirements 7 Minimum Data Requirements for Published Ratings . 7 Marking and Nameplate Data 10 Voluntary Conformance 10 FIGURES Blow-Through Central Station Air-Handling Unit . 2 Draw-Through Central Station Air-Handling Unit . 2 Multiple Fan Outlet Test Configuratio
4、ns . 4 Dimensions for Inlet Vane Proportionality . 4 . 6 Fan and Unit Characteristics . Fan Rated and Unit Tested 8 Fan and Unit Characteristics . Fan Rated and Unit Calculated . 9 Draw-Through Unit With Air Flow Direction Change Copyright Air-Conditioning and Refrigeration Institute Provided by IHS
5、 under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-APPENDICES Appendix A . Appendix B . References . Normative . 11 References . Informative 11 Criteria for Proportionality . Informative . 12 Appendix C . FIGURES FOR APPENDICES Figure C 1 . Dime
6、nsions Used for Proportionality Equations 14 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSUARI STANDARD 430-1999 CENTRAL STATION AlR-HANDLING UNITS Section 1. Purpose
7、 1.1 Purpose. The purpose of this standard is to establish for central station air-handling units: definitions; classifications; requirements for testing and rating; minimum data requirements for published ratings; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This standard i
8、s 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 and amendment as technology - advances. Section 2. Scope 2.1 Scope. This standard applies to central station air- handli
9、ng units, as defined in Section 3. 2.2 Exclusions. 2.2.1 This standard does not apply to forced- circulation, free-delivery air-coolers for refrigeration, which are covered in AR1 Standard 420. 2.2.2 This standard does not apply to unit heaters intended for free delivery of heated air or to room fan
10、- coil air-conditioners as defined in AR1 Standard 440. 2.2.3 This standard does not apply to units having direct expansion coils which are incorporated by the manufacturer in a matched split system air-conditioner or as otherwise defined in the product scope definition of the AR1 Unitary Small Equi
11、pment and Unitary Large Equipment Sections and covered in AR1 Standard 2101240 or in AR1 Standard 3401360. 2.2.4 as defined in AR1 Standard 840. This standard does not apply to unit ventilators 2.2.5 This standard does not apply to ratings for plenum (plug) and axial fans. Section 3. Definitions 3.1
12、 Definitions. All terms in this document will follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defined in this section. 3.2 Central Station Air-Handling Unit. A factory-made encased asse
13、mbly consisting of a fan or fans and other necessary equipment to perform one or more of the functions of circulating, cleaning, heating, cooling, humidifying, dehumidifying and mixing of air; and shall not contain a source of cooling or heating other than gas or electric heat. This device is capabl
14、e of use with duct work having a total static resistance of at least 0.5 in. H,O 0.12 Ea. 3.2.1 Blow-Through Central Station Air-Handling Unit (see Figure 1). A unit containing a fan that does not have a ducted fan outlet. 3.2.2 Draw-Through Central Station Air-Handling Unit (see Figure 2). A unit t
15、hat has a ducted fan outlet. 3.2.3 Fan. An impeller and any other items, such as housings and inlet vanes that are an integral part of the impeller and/or housing that affect the basic performance characteristics of the fan. 3.2.4 Unit Appurtenances. Equipment added for purposes of control, isolatio
16、n, safety, static pressure regain, wear, etc. Such appurtenances include coils, filters, dampers, air-mixers, sprays, eliminators, etc. 3.3 Published Rating. A statement of the assigned values of those performance characteristics, under stated rating conditions, by which a unit may be chosen to fit
17、its application. These values apply to ali units of like nominal size and type (identification) produced by the same manufacturer. As used herein, the term “published rating“ includes the rating of all performance characteristics shown on the unit or published in specifications, advertising or other
18、 literature controlled by the manufacturer at stated rating conditions. Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSVARI STANDARD 430-1999 1 1- Figure 1. Blow-Throug
19、h Central Station Air-Handling Unit Figure 2. Draw-Through Central Station Air-Handling Unit 2 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSUARI STANDARD 430-1999 3.3
20、.1 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.3.2 Application Rating. A rating based on tests performed at ApplicationRating Conditions (other than Standard Rating Conditions). 3.4 Rating Conditions. Any set of operating conditions under which a single level
21、of performanceresults, and which causes only that level of performance to occur. 3.4.1 Standard Rating Conditions. - Rating conditions used as the basis of comparison for performance characteristics. 3.5 “Shall,“ “Should, “ “Recommended“ or “It Is Recommended. “ “Shall,“ “should,“ “recommended“ or “
22、it is recommended“ shall be interpreted as follows: 3.5.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.5.2 Should, Recommended or It is Recommended. “Should,“ “recommended“ or “it is recommended“ is u
23、sed to indicate provisions which are not mandatory but which are desirable as good practice. 3.6 Standard Air. Air weighing 0.075 lb/ft3 1.2 kg/m3 which approximates dry air at 70.O“F 21.1C and at a barometric pressure of 29.92 in. Hg 101.1 Wal. Section 4. Classifications 4.1 Methods of Classificati
24、on. Central station air- handling units may be classified according to the following: A. UnitType 1. Blow-through 2. Draw-through B. Application Type 1. Indoor 2. Outdoor Section 5. Test Requirements 5.1.1 Arrangements for, Testing. 5.1.1.1 Single Outlet Draw-Through Units. Single outlet draw-throug
25、h units shall be tested in accordance with ANSYASHRAE Standard 5 UAMCA Standard 210. 5.1.1.2 Multiple Outlet Draw-Through Units. Multiple outlet draw-through units shall be tested as in 5.1.1.1 with each fan outlet ducted as shown in Figure 3 to the air flow measuring device. Individual fan outlet d
26、uct friction losses shall not be included. 5.1.1.3 Blow-Through Units. Blow-through units shall be tested in accordance with ANSUASHRAE Standard 5 UAMCA Standard 210, except when an outlet chamber with multiple nozzles within the chamber is used. The test chamber cross-sectional area may be sized so
27、 that the maximum air velocity shall not exceed 400 fpm 2 m/s. The test chamber height and width shall be at least 5% greater than the respective height and width of the duct connection at the test chamber. Duct area at the test chamber connection plane cannot exceed the duct area at the unit connec
28、tion plane. 5.2 Description of Test Unit. This standard permits the omission of all appurtenances in the test unit except the coil section, where used. Units to be tested shall contain the largest cataloged face area coil for that size and arrangement (where applicable). The coil, fan sheave, and la
29、rgest internally mounted fan motor shall be mounted in their most restrictive cataloged location relative to the fan with the coil having a pressure drop of at least 0.075 in. H,O 0.019 Wal at 500 fpm 2.54 m/s coil face velocity with Standard Air. The coil shall be de-energized and the unit operatin
30、g without coil by-pass. In the case of a blow-through heating- cooling unit with multiple discharge path, all but the cooling coil position shall be blocked and the unit tested with horizontal air discharge. The pressure drop of the coils shall have been determined in accordance with AR1 Standard 41
31、0. 5.3 Extension of Test Data. Test data may be extended to other units in accordance with the provisions of 5.3.1, 5.3.2 and 5.3.3. 5.1 Testing Requirements. All Standard Ratings shall be verified by tests conducted in accordance with ANSYASHRAE Standard 5 l/AMCA Standard 210, except as modified by
32、 5.1.1.3. 3 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- ANSVARI STANDARD 430-1 999 I n A 44 i= 1 A = Combined area of individual fan outlets Ai = Area of individuai fa
33、n outlets n =numberofoutlets I Figure 3. Multiple Fan Outlet Test Configuration Figure 4. Dimensions for Inlet Vane Proportionality 4 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license fro
34、m IHS-,-,-ANWARI STANDARD 430-1 999 5.3.1 Application of Fan Laws to Units with Inlet Vanes. Units with inlet vanes may be rated one of three ways: 1) using the fan laws as described by 5.3.2 for proportional units with proportional fans and inlet vanes; 2) using the fan laws as described in 5.3.3 f
35、or proportional units with nonproportional fans and inlet vanes; or 3) using the fan laws by applying the appropriate inlet vane derate factors to units without inlet vanes rated per Sections 5.3.2 or 5.3.3 when the inlet vanes of the test unit are proportional to the inlet vanes of the rated units.
36、 (Since all requirements for proportionality of cabinets, fan impellers, and housing are satisfied by provisions in either 5.3.2 or 5.3.3 without inlet vanes, rated units with inlet vanes derived by inlet vane derate factors must only meet inlet vane proportionality criteria.) Inlet vanes are consid
37、ered to be proportional when the inlet vanes shall result in net air flow areas not less than 92.5% of those derived from exact proportionality (as defined in Section 5.3.2) when located within 0.5 impeller diameter from the fan inlet. The test unit must be tested with vanes in the wide open positio
38、n as specified by the manufacturer. Vane shaft angle, 8, (with respect to fan shaft centerline) and the number of vane blades for the rated unit must be the same as for the test unit (see Figure 4). When evaluating geometrical proportionality of inlet vanes, the distance between vane and impeller (d
39、efined as dimensions between impeller inlet plane and the closest point of vanes with the vanes at wide open position, as set by the manufacturer) and the distance between cabinet side and fan inlet shall be considered. The method of rating one unit with inlet vanes from the test of another is descr
40、ibed in Sections 5.3.3.1 through 5.3.3.7. 5.3.2 Application of Fan Laws to Proportional Units with Proportional Fans. Test data may be extended by use of the fan laws to units containing fans, geometrically proportional fan cabinets and impellers (see Appendix C). The fan impeller diameter of the un
41、it to be calculated shaI1 not be less than 65% of the fan impeller diameter of the test unit. Fans are considered to be proportional when: a. Impeller width, housing development radii, and housing width are proportional within f 1.5%. a. b. C. d. The clearance between the cabinet and the nearest fan
42、 housing are proportional or greater. The clearance between adjacent fan housings, as measured parallel to the fan shaft, are proportional or greater. The fan cabinet inlet and the fan cabinet outlet air flow cross sectional areas are not less than 92.5% of the respective geometrically proportionate
43、 values. Arrangement and location of internal bearings and their supports, inlet vanes, motors and drives, shall result in net air flow areas not less than 92.5% of those derived from exact proportionality when located within 0.5 impeller diameter of the fan iniet. The basis for proportionality in e
44、very case shall be the respective impeller diameters; linear dimensions shall be proportional to the diameter, and areas shall be proportional to the square of the diameter. Single fan units may be rated from the test of a multiple fan unit provided that the units are otherwise proportional and that
45、 the clearance between fans on the multiple fan unit is not more than twice the proportionate clearance between the cabinet and the fan housing on a single fan unit. In no case, shall the ratings of a multiple fan unit from tests of a single fan unit be accepted. Air flow and fan shaft power are con
46、sidered to be proportional to the number of fans. Draw-through units which have a change in air-flow direction between the coil and the fan (Figure 5) may be rated from tests of units which do not have this flow direction change (Figure 2) provided the plenum causing the air direction change be cons
47、idered an appurtenance and the effect of its application added to those of other appurtenances as provided in 6.1.1 There is no distinction in rating between a vertical discharge and a horizontal discharge blow-through unit. The effects of proportions of bolts, nuts, rivets, etc., shall be considere
48、d to be negligible. b. Fan housing outlet area is proportional within static pressure, in. H,O Wal; fan speed, rpm reds; and the power required at the fan shaft, brake horsepower, bhp W based on the procedures outlined in 5.2 and 5.3 of this standard. 7 Copyright Air-Conditioning and Refrigeration I
49、nstitute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,- ANSIIARI STANDARD 430-1 999 .- - J? * iti E I pi d Fi h O O I E u % 3 8 O u - e, e U Y 1 O s e 5 u 1 O 4 s L O Y s e a O .3 a I CI a u) ci 8 ci .- S 3 CI c (I CI a (I S (I u, V) o V) ci a I .- .I- .- E! =I ul U .- 9 Copyright Air-Conditioning and Refrigeration Institute
