1、1 Price $10.00 (M) $20.00 (NM) Copyright 2009, by Air-Conditioning and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office 2015 Standard for Performance Rating of Unit Ventilators AHRI Standard 841 (SI Price $10.00 (M) $20.00 (NM) Copyright 2015, by Air-Con
2、ditioning, Heating, and Refrigeration Institute Printed in U.S.A. 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, rated, installed
3、 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/guideline. A
4、HRI 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. Note: This standard supersedes AHRI Standard 840-9
5、8. See AHRI Standard 840 for I-P ratings. AHRI CERTIFICATION PROGRAM PROVISIONS Scope of the Certification Program The certification program includes Unit Ventilators, as defined in Section 3, with outside air ventilation and return air dampers capable of providing ventilation air of at least 80% of
6、 rated standard airflow with the capability of providing any combination of these functions: humidity control, circulation, heating, cooling and filtering of air. Certified Ratings Refer to the Unit Ventilators Operations Manual for the certified ratings. TABLE OF CONTENTS SECTION PAGE Section 1. Pu
7、rpose . 1 Section 2. Scope 1 Section 3. Definitions 1 Section 4. Classifications 2 Section 5. Test Requirements 3 Section 6. Rating Requirements 3 Section 7. Minimum Data Requirements for Published Ratings . 4 Section 8. Operating Requirements . 5 Section 9. Marking and Nameplate Data . 6 Section 10
8、. Conformance Conditions 6 TABLES Table 1. Air Flow Testing Conditions 4 Table 2. Standard Rating Conditions for Unit Ventilators 5 FIGURES Figure 1. Standard Ventilation Rate Test Set-up . 3 APPENDICES Appendix A. References - Normative 7 Appendix B. References - Informative 8 AHRI STANDARD 841 (SI
9、)-2015 1 PERFORMANCE RATING OF UNIT VENTILATORS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish, for Unit Ventilators: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; operating requirements; marking a
10、nd 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 and amendment as technology advances. Sectio
11、n 2. Scope 2.1 Scope. This standard applies to Unit Ventilators, defined in Section 3.6. 2.2 Exclusions. This standard does not apply to equipment as defined in the following standards: 2.2.1 This standard does not apply to room air-conditioners, which are covered in AHAM Standard RAC-1 and/or ANSI
12、Standard Z234.1. 2.2.2 This standard does not apply to central-station air-handling units, which are covered in ANSI/AHRI Standard 431 (SI). 2.2.3 This standard does not apply to variable refrigerant flow multi-split air conditioners and multi-split heat pumps, which are covered in ANSI/AHRI Standar
13、d 1230. Section 3. Definitions All terms in this document will follow the standard industry definitions in the ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) and in ANSI/AHRI Standard 210/240, ANSI/AHRI Standard 440, ANSI/AHRI/CSA Standard
14、 310/380, ANSI/AHRI Standard 390, and ANSI/AHRI/ASHRAE/ISO Standard 13256-1. 3.1 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 its application. These values apply to all units of like no
15、minal 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 literature controlled by the manufacturer, at stated rating
16、conditions. 3.1.1 Application Rating. A rating based on tests performed at application rating conditions (other than Standard Rating Conditions.) 3.1.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.2 Rating Conditions. Any set of operating conditions under which
17、 a single level of performance results and which causes only that level of performance to occur. 3.2.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.2.2 Application Rating Conditions. Rating conditions that are not the standard ratin
18、g conditions. AHRI STANDARD 841 (SI)-2015 2 3.3 “Shall“ or “Should“. “Shall“ or “should“ shall be interpreted as follows: 3.3.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.3.2 Should. “Should“ is use
19、d to indicate provisions which are not mandatory but which are desirable as good practice. 3.4 Standard Air. Air weighing 1.204 kg/m3 which approximates dry air at 21.1C at a barometric pressure of 101.3 kPa. 3.5 Standard Ventilation Rate. The outdoor airflow to be provided in the breathing zone to
20、dilute contaminates generated by space occupants and contents of the building contaminates, m3/s. 3.6 Unit Ventilator. A factory-made assembly, equipped with outside air ventilation and return air dampers capable of introducing ventilation air of at least 80% of rated air flow of Standard Air, while
21、 also having the capability to provide any combination of the following functions: humidity control, heating, cooling, and filtering of air. The source of humidity control, heating or cooling supplementary to that from ventilation air, may be remote or an integral part of the unit itself. This equip
22、ment is designed for free delivery of air into a room, but may be applied with minimal ductwork having a static resistance not exceeding 125 Pa. This equipment can be either vertical floor standing or horizontally mounted, in or adjacent to the space it serves. This equipment is provided with air ca
23、pacities of 1415 m3/s or less. 3.6.1 DX Fan-coil Unit Ventilators. Any equipment as defined in ANSI/AHRI Standard 210/240 with ventilation capabilities as defined in Section 3.6. 3.6.2 Hydronic Fan-coil Unit Ventilators. Any equipment as defined in ANSI/AHRI Standard 440 with ventilation capabilitie
24、s as defined in Section 3.6. 3.6.3 Self-contained Unit Ventilators. Any equipment as defined in ANSI/AHRI/CSA Standard 310/380 with ventilation capabilities as defined in Section 3.6. 3.6.4 Single Package Vertical Unit Ventilators. Any equipment as defined in ANSI/AHRI Standard 390 with ventilation
25、capabilities as defined in Section 3.6. 3.6.5 Water-source Self-contained Unit Ventilators. Any equipment as defined in ANSI/AHRI/ASHRAE/ISO Standard 13256-1 with ventilation capabilities as defined in Section 3.6. Section 4. Classifications 4.1 Methods of Classification. Unit ventilators shall be c
26、lassified according to the following: 4.1.1 By Unit Type. 4.1.1 DX Fan-coil Unit Ventilators. 4.1.2 Hydronic Fan-coil Unit Ventilators. 4.1.3 Self-contained Unit Ventilators. 4.1.4 Single Package Vertical Unit Ventilators. 4.1.5 Water-source Self-contained Unit Ventilators. AHRI STANDARD 841 (SI)-20
27、15 3 Section 5. Test Requirements 5.1 Testing Requirements. All ratings shall be verified by tests conducted in accordance with ANSI/ASHRAE Standard 79. 5.1.1 Room Air Test. The room air test shall be conducted with the ventilation air inlet opening sealed so that no airflow enters the unit except f
28、rom the room side. The airflow rate shall be the value measured from flowmeter 1 as depicted in Figure 1 and as indicated in Table 1. 5.1.2 Ventilation Air Test. The ventilation air test shall be conducted with an airflow rate measuring apparatus connected to the ventilation air opening. The airflow
29、 rate shall be the value measured from flowmeter 2 as depicted in Figure 1. Flowmeter 1 and any associated ductwork shall be removed for this test. Units shall be tested without any outside air intakes, louvers, wall boxes, etc. in place. The unit shall be tested with an external static of negative
30、0.01 kPa measured at the ventilation air inlet to simulate the pressure drop of a typical device and as indicated in Table 1. Figure 1. Standard Ventilation Rate Test Set-up Section 6. Rating Requirements 6.1 Standard Ratings. 6.1.1 Standard Performance Ratings. All applicable cooling capacity, heat
31、ing capacity, power input, efficiency, standard airflow rate, fluid flow rate, and pressure drop ratings shall be verified by tests conducted at the Standard Rating Conditions, in accordance with the applicable standard(s) referenced in Sections 3.6.1, 3.6.2, 3.6.3, 3.6.4 and 3.6.5. 6.1.2 Standard V
32、entilation Rate. The Standard Ventilation Rate, expressed in percent, shall be determined in accordance with ANSI/ASHRAE Standard 79 by conducting two separate tests at the conditions specified in Table 1. References may also be made to ANSI/ASHRAE Standard 79 for a typical duct connection arrangeme
33、nt. AHRI STANDARD 841 (SI)-2015 4 6.2 Electrical Conditions. All Standard Rating tests shall be performed at the nameplate rated voltage and frequency. For units with dual nameplate voltage ratings, standard rating tests shall be performed at both voltages, or at the lower of the two voltages, if on
34、ly a single standard rating is to be published. 6.3 Equipment. Filters, any air-mixers, air-inlets, grilles, deflecting vanes, and any other regularly-furnished equipment shall be in place during all tests. Table 1. Air Flow Testing Conditions Room Air Test Ventilation Air Test Inlet Air Temperature
35、 21C to 27C dry bulb 21C to 27C dry bulb Heating or cooling means Not in operation Not in operation Static Pressure difference between room air inlet and outlet 0.0 kPa Free discharge Static Pressure at ventilation air inlet N/A Negative 0.01 kPa Fan Speed Setting Same as for standard cooling rating
36、 condition Same as for standard cooling rating condition Inside /Outside Damper Position Adjusted for full room air (no ventilation air) Adjusted for full ventilation air (no room air) Face/Bypass Damper Position (if equipped) Adjusted for full face, 0% bypass Adjusted for full face, 0% bypass ANSI/
37、ASHRAE Standard 41.2 Test Arrangements See Figure 14 of ANSI/ASHRAE Standard 41.2 See Figure 13 of ANSI/ASHRAE Standard 41.2 6.4 The Standard Ventilation Rate shall be the ratio of air flow rate measured in accordance with Section 5.4.2 divided by the air flow rate measured in accordance with Sectio
38、n 5.4.1 expressed as a percent. 6.5 Application Ratings. Ratings at conditions other than the Standard Rating Conditions may be published as application ratings, and shall be based on data determined by the methods of testing prescribed in the applicable standards referenced in Sections 3.6.1, 3.6.2
39、, 3.6.3, 3.6.4 and 3.6.5. 6.6 Tolerances. To comply with this standard, published or reported cooling capacity, heating capacity, power input, efficiency, standard air flow rate, fluid flow rate, and pressure drop shall be based on data obtained in accordance with the provisions of this section, and
40、 shall be such that any production unit selected at random and tested in accordance with the standard shall achieve 100% of rated or published value, less the allowable tolerance specified in the applicable standard(s) referenced in 3 Sections 3.6.1, 3.6.2, 3.6.3, 3.6.4 and 3.6.5. The tested Standar
41、d Ventilation Rate shall be no less than 95% of the rated value and no less than 80% of the airflow rate measured in Section 6.4. Section 7. Minimum Data Requirements for Published Ratings 7.1 Published Ratings. Wherever application ratings are published or printed, they shall include or be accompli
42、shed by the Standard Rating clearly designated as such, including a statement of the conditions at which the ratings apply. All Published Ratings shall include the Standard Ventilation Rate, as well as the information required per product type as shown in Table 2. AHRI STANDARD 841 (SI)-2015 5 Table
43、 2. Standard Rating Conditions for Unit Ventilators Published Ratings Self-Contained Unit Ventilators Single Package Vertical Unit Ventilator Hydronic Fan-coil Unit Ventilators DX Fan-coil Unit Ventilators Water-source Self-contained Unit Ventilators Cooling Capacity Full load at standard temperatur
44、e Full load at standard temperature Full load at standard temperature Full load at high temperature Full load at standard temperature and part load at low temperature Cooling Efficiency Part load IPLV Part load IPLV N/A N/A N/A Heating Capacity Full load at standard temperature Full load at standard
45、 temperature Full load at high temperature Full load at standard temperature and part load at low temperature Heating Efficiency Full load COP Full load COP Full load and part load HSPF Full load and part load COP Sensible Cooling Capacity N/A N/A Applicable N/A N/A Standard Ventilation Rate Applica
46、ble Applicable Applicable Applicable Applicable Power Input N/A N/A Applicable N/A N/A 7.1.1 Cooling Capacity, W 7.1.2 Heating Capacity, if applicable, W 7.1.3 Heating Coefficient of Performance (COP), if applicable 7.1.4 Part Load Rating (IPLV), kW 7.1.5 Region IV Heating Seasonal Performance Facto
47、r, HSPF, Minimum Design Heating Requirement, if applicable 7.1.6 Power Input, W 7.1.7 Standard Ventilation Rate, m3/s Section 8. Operating Requirements 8.1 Performance Requirements. To comply with this standard, unit ventilators shall be designed and produced so as to perform in accordance with the
48、provisions of this section, in such a manner that any production unit will meet the requirements detailed herein. 8.1.1 Self-contained Unit Ventilators. All performance tests for Self-contained Unit Ventilators shall be tested in accordance with the provisions of ANSI/AHRI/CSA Standard 310/380. 8.1.
49、2 Single Package Vertical Unit Ventilator. All performance tests for Single Package Vertical Unit Ventilator shall be tested in accordance with the provisions of ANSI/AHRI Standard 390. 8.1.3 Water-source Self-contained Unit Ventilators. All performance tests for Water-source Self-contained Unit Ventilators shall be tested in accordance with the provisions of ANSI/AHRI/ASHRAE/ISO Standard 13256-1. AHRI STANDARD 841 (SI)-2015
