1、 AHRI Standard 621 (SI) 2014 Standard for Performance Rating of Self-contained Humidifiers for Residential Applications Price $10.00 (M) $20.00 (NM) Copyright 2014, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States Patent and Trademark Office IMPORT
2、ANT 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 or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, a
3、ssembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this standard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI do
4、es not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. Note: This is a new standard. For I-P ratings, see AHRI Standard 620 (I-P)-2014. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose .1 Section 2. Scope 1 Section 3. Definitions
5、1 Section 4. Classifications 2 Section 5. Test Requirements .2 Section 6. Rating Requirements 4 Section 7. Minimum Data Requirements for Published Ratings 4 Section 8. Operating Requirements 5 Section 9. Marking and Nameplate Data 5 Section 10. Conformance Conditions .5 APPENDICES Appendix A. Refere
6、nces Normative .6 Appendix B. References Informative .6 AHRI STANDARD 621 (SI)-2014 1 PERFORMANCE RATING OF SELF-CONTAINED HUMIDIFIERS FOR RESIDENTIAL APPLICATIONS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Self-contained Humidifiers: definitions; classification
7、s; test requirements; rating requirements; minimum data requirements for Published Ratings; operating requirements; 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, contra
8、ctors 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 factory-made Self-contained Humidifiers for Residential Applications, as defined in Section 3. 2.1.1 Energy Source. This standard
9、 applies to electrically operated Self-contained Humidifiers that are independent of the air stream of a central air system for moisture evaporation and distribution. 2.1.2 Installation. The Self-contained Humidifier is intended for installation through an interior wall. 2.2 Exclusions. This standar
10、d does not apply to the following: 2.2.1 Central system humidifiers as defined in AHRI Standard 611. 2.2.2 Portable humidifiers as defined in AHAM HU-1. 2.2.3 Humidifiers for commercial and industrial applications as defined in ANSI/AHRI Standard 640. Section 3. Definitions All terms in this documen
11、t will follow the standard industry definitions in the ASHRAE Wikipedia website (http:/wiki.ashrae.org/index.php/ASHRAEwiki) unless otherwise defined in this section. 3.1 Humidification Capacity. The capacity associated with a Humidifiers ability to add moisture to air expressed in L/day of continuo
12、us operation. 3.2 Humidifier. A device designed to add moisture to air. 3.2.1 Self-contained Humidifiers for Residential Applications (Self-contained Humidifier). A class of Humidifier intended for non-ducted installation, but may be employed in ductwork, to be installed with a water make-up line an
13、d/or drain, electrical service, and is independent of a central air system. It may or may not be installed within the humidified space. 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
14、its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the unit or published in specifications, advertising or other literature contro
15、lled by the manufacturer, at stated Rating Conditions. AHRI STANDARD 621 (SI)-2014 2 3.3.1 Application Rating. A rating based on tests performed at application Rating Conditions (other than Standard Rating Conditions). 3.3.2 Standard Rating. A rating based on tests performed at Standard Rating Condi
16、tions. 3.4 Rating Conditions. Any set of operating conditions under which a single level of performance results 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“ o
17、r “Should“. “Shall“ or “should“ 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. “Should“ is used to indicate provisions which are not mandatory but whic
18、h are desirable as good practice. 3.6 Supplementary Heat. Heat used to enhance evaporation by heating the water and/or air for direct evaporation when the Humidifier is used in a recirculating system. 3.7 Wet-bulb and Dry-bulb Temperatures. Temperatures tt, and ttare the average of the test temperat
19、ures entering the test section immediately before entering the Self-contained Humidifier under test. Temperatures trand trare the rated temperatures at the same point. Section 4. Classifications 4.1 Self-contained Humidifiers within the scope of this standard shall be classified according to the loc
20、ation of the evaporative process and the source of evaporative energy, as follows: 4.1.1 Within the unit without Supplementary Heat 4.1.2 External to unit without Supplementary Heat 4.1.3 Within the unit with Supplementary Heat 4.1.4 External to unit with Supplementary Heat Section 5. Test Requireme
21、nts 5.1 Test Requirements. Published Ratings shall be verified by tests conducted in accordance with the test method described in ANSI/ASHRAE 164.2-2012 and at the rating conditions in Section 6, except as listed below: 5.1.1 Humidification Capacity The humidification capacity shall be calculated us
22、ing the following equation (in lieu of ANSI/ASHRAE 164.2 Equation 1): ( )tH-sHF1K=mH1 tt-ttrt-rt=F 2 Where: F = Temperature correction factor Hm= Humidification Capacity, L/day Hs= Water supply rate, L/day Ht= Waste water rate,L/day AHRI STANDARD 621 (SI)-2014 3 K1= 0.264 tr= Return air Dry-bulb tem
23、perature at Rating Conditions, C tr= Return air Wet-bulb temperature at Rating Conditions, C tt= Return air Dry-bulb test temperature, C tt= Return air Wet-bulb test temperature, C 5.1.2 Observations and Conduct of Test. The method of testing shall be in accordance with ANSI/ASHRAE 164.2 Section 7 a
24、nd with the following test procedure outlined below: 5.1.2.1 Water Supply Source Adjustment. If the water quantity measuring apparatus prescribed in ANSI/ASHRAE 164.2 Section 7 does not permit supply water flow rate determination while the Self-contained Humidifier is connected to the water supply s
25、ource, the procedure described below shall be followed. The purpose for adjusting the water flow rate is to establish the water level that is to be maintained in a Self-contained Humidifier which has a float or balanced-pan valve, or the water flow rate for a Self-contained Humidifier equipped with
26、an electrical water control valve (solenoid valve). 5.1.2.1.1 Water Level Determination. A Self-contained Humidifier which contains a reservoir shall be installed in the test apparatus and adjusted in accordance with the manufacturers recommendations. It shall be operated in the test apparatus while
27、 connected to the water supply source described in ANSI/ASHRAE 164.2 Section 7. The water level in the reservoir shall be observed. After it has remained constant during an operating period of not less than 30 minutes, a water-level line shall be marked on the reservoir. This reservoir water level s
28、hall be maintained during the capacity test. 5.1.2.1.2 Water Flow Rate Determination. A Self-contained Humidifier which utilizes an electric water control valve shall be adjusted in accordance with the manufacturers recommendations. (An alternative procedure is to remove the water control valve from
29、 the Self-contained Humidifier and adjust the flow rate in accordance with the manufacturers recommendations.) The water control valve shall be opened electrically. The water to and the waste water from the Self-contained Humidifier shall be determined using ANSI/ASHRAE 164.2 Section 7. The period o
30、f the preliminary test shall not be less than 30 minutes. 5.1.2.1.3 Water or Steam Flow Rate Determination - Supplementary Heat Using a Recirculating Coil. The water or steam flow rate through the recirculating coil or Self-contained Humidifiers using such a coil for Supplementary Heat shall be adju
31、sted as necessary to maintain the required inlet water temperature and pressure or inlet steam pressure during the test. 5.1.2.1.4 Air Pressures. Air pressures or a differential pressure shall be observed and recorded at the following locations: 5.1.2.1.4.1 Static pressure drop across flow nozzle, P
32、a 5.1.2.1.4.2 Absolute pressure of air entering flow nozzle, kPa 5.1.2.1.4.3 Pressure entering humidifier test section, Pa below atmospheric pressure 5.1.2.1.5 Water Quantity. Weights or water flow rates shall be recorded (when converting Humidification Capacity from kg/hr to L/day, one liter of wat
33、er shall be assumed to weigh 1 kg): 5.1.2.1.5.1 Supply water to Self-contained Humidifier, kg or L 5.1.2.1.5.2 Waste water from the Self-contained Humidifier, kg or L 5.1.2.1.5.3 Recirculating water (where used), kg/h or L/h 5.1.2.1.5.4 Steam condensate (where used), kg/h 5.2 Equipment. Self-contain
34、ed Humidifiers shall be tested using all components as recommended by the manufacturer. AHRI STANDARD 621 (SI)-2014 4 5.3 Electrical Conditions. Nameplate voltages are shown in Table 1 of ANSI/AHRI Standard 110. Nameplate voltages for 50 Hz systems shall include one or more of the utilization voltag
35、es shown in Table 1 of International Standard IEC 60038. Tests shall be performed at the nameplate rated voltage and frequency unless otherwise specified in this Standard. For all dual nameplate voltage equipment covered by this standard, tests shall be performed at both voltages or at the lower vol
36、tage if only a single rating is to be published. 5.4 Outlet-side Air-flow Rate. Published Ratings shall be determined at an outlet-side air flow rate delivered when operating against zero external static pressure or at a lower air flow rate if so specified by the manufacturer. All power consumed by
37、the fan(s) shall be included in the power input to the unit. All air flow rates shall be expressed in m3/s. Section 6. Rating Requirements 6.1 Published Ratings. Published Ratings shall include Humidification Capacity, power input, and the energy input of Supplementary Heat. Humidification Capacity
38、shall be expressed in terms of L/day and stated to the nearest 0.5 L/day. Power input shall be expressed in W stated to the nearest 5 W. Energy input of Supplementary Heat shall be expressed in W stated to the nearest 30 W. Air flow rates shall be expressed in increments of 0.005 m3/s. 6.2 Standard
39、Ratings. Ratings based on data determined by the test requirements prescribed in Section 5 shall be published as Standard Ratings when conducted at the Standard Rating Conditions in Table 1. Table 1. Standard Rating Conditions Rating Name Rating Value Air temperature entering Self-contained Humidifi
40、er 24.0C Dry-bulb Temperature and 13.5C Wet-bulb Temperature Air velocity in humidifier test section (with Self-contained Humidifier not operating) 0.25 m/s Static pressure difference between inlet and outlet of Self-contained Humidifier 0 Pa Water pressure entering control valve 415 Pa Water temper
41、ature entering control valve 15.5C 6.2.1 Supplementary Heat (Water) Test Conditions. Water pressure entering control valve . 100 kPa gage Water temperature entering control valve 49.0C 6.2.2 Supplementary Heat (Steam) Test Conditions. Steam pressure entering control valve . 14 kPa gage 6.3 Applicati
42、on Ratings. Ratings based on data determined by test requirements prescribed in Section 5 and conducted using Rating Conditions other than those specified in 6.2 shall be published as Application Ratings. 6.4 Tolerances. To comply with this standard, measured test results shall not be less than 95%
43、of Published Ratings for Humidification Capacity and shall not exceed 110% of Published Ratings for power input or energy input of Supplementary Heat. Where Supplementary Heat (water) is used, the energy input from this source shall not be more than the rated power input. Section 7. Minimum Data Req
44、uirements for Published Ratings 7.1 Minimum Data Requirements for Published Ratings. As a minimum, Published Ratings shall consist of the following information: 7.1.1 Humidification Capacity, L/day 7.1.2 Power input, kW AHRI STANDARD 621 (SI)-2014 5 7.1.3 Energy input of Supplementary Heat, W (where
45、 Supplementary Heat is used) As a minimum, Published Ratings shall include all Standard Ratings. All claims to ratings within the scope of this standard shall include the statement “Rated in accordance with AHRI Standard 621 (SI)”. All claims to ratings outside the scope of this standard shall inclu
46、de the statement “Outside the scope of AHRI Standard 621 (SI)”. Wherever Application Ratings are published or printed, they shall include a statement of the conditions at which the ratings apply. Section 8. Operating Requirements 8.1 Operating Requirements. To comply with this standard, any producti
47、on unit shall meet the minimum operating requirements detailed in this section. 8.2 Water-trace Test. Self-contained Humidifiers shall pass a water-trace test for each class designation as specified in the manufacturers installation instructions when operated at Standard Rating Conditions specified
48、in Section 6.2. 8.2.1 Procedure. The Self-contained Humidifier shall operate for the duration of the Standard Rating test. 8.2.2 Requirements. 8.2.2.1 During the test, water shall not drip or run off the Self-contained Humidifier under test. 8.2.2.2 After the test, the surface under or surrounding t
49、he Self-contained Humidifier shall be dry, provided that the surface temperature exceeds 5.5C. 8.3 Water Flow Control Test. Self-contained Humidifiers shall pass the following water flow control test when operated at Standard Rating Conditions specified in Section 6.2 except for water pressure conditions. 8.3.1 Water Pressure Conditions. Water pressure conditions shall be maintained at 140 kPa. 8.3.2 Procedure. The Self-contained Humidifier shall operate continuously for 30 minutes. The wa
