1、 AHRI Standard 620 (I-P) 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 standard supersedes AHRI Standard 620-2004. For SI ratings, see AHRI Standard 621 (SI)-2014. TABLE OF CONTENTS SECTION PAGE Section 1. Purpose .1 Section 2. Scope 1
5、 Section 3. Definitions1 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 APPEND
6、ICES Appendix A. References Normative .6 Appendix B. References Informative .6 AHRI STANDARD 620 (I-P)-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: def
7、initions; classifications; 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, engin
8、eers, 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 factory-made Self-contained Humidifiers for Residential Applications, as defined in Section 3. 2.1.1 Ener
9、gy Source. This standard 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
10、Exclusions. This standard does not apply to the following: 2.2.1 Central system humidifiers as defined in AHRI Standard 610. 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 A
11、ll terms in this document 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 expres
12、sed in gal/day of continuous 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, that is to be inst
13、alled with a water make-up line and/or drain, electrical service, and that 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
14、, by which a unit may be chosen to fit 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,
15、 advertising or other literature controlled by the manufacturer, at stated Rating Conditions. AHRI STANDARD 620 (I-P)-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
16、tests performed at Standard Rating Conditions. 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 pe
17、rformance characteristics. 3.5 “Shall“ or “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 pro
18、visions which are not mandatory but which 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, an
19、d ttare the average of the test temperatures 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
20、shall be classified according to the location 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 Supp
21、lementary Heat Section 5. Test Requirements 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 humidi
22、fication capacity shall be calculated using 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, gal/day Hs= Water supply rate, gal/day Ht= Waste water rate, gal/day AHRI STANDARD 620 (I
23、-P)-2014 3 K1= 1.000 tr= Return air Dry-bulb temperature at Rating Conditions, F tr= Return air Wet-bulb temperature at Rating Conditions, F tt= Return air Dry-bulb test temperature, F tt= Return air Wet-bulb test temperature, F 5.1.2 Observations and Conduct of Test. The method of testing shall be
24、in accordance with ANSI/ASHRAE 164.2 Section 7 and 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-contain
25、ed Humidifier is connected to the water supply source, 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 rat
26、e for a Self-contained Humidifier equipped with 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.
27、It shall be operated in the test apparatus while 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 marke
28、d on the reservoir. This reservoir water level shall 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 pro
29、cedure is to remove the water control valve from 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
30、 using ANSI/ASHRAE 164.2 Section 7. The period of 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
31、such a coil for Supplementary Heat shall be adjusted 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 as follows: 5.1.2.1.4.1 Static
32、pressure drop across flow nozzle, in H2O 5.1.2.1.4.2 Absolute pressure of air entering flow nozzle, in Hg 5.1.2.1.4.3 Pressure entering humidifier test section, in H2O below atmospheric pressure 5.1.2.1.5 Water Quantity. The following weights or water flow rates shall be recorded (when converting Hu
33、midification Capacity from lb/hr to gal/day, one gallon of water shall be assumed to weigh 8.34 lb.): 5.1.2.1.5.1 Supply water to Self-contained Humidifier, lb or gal 5.1.2.1.5.2 Waste water from the Self-contained Humidifier, lb or gal 5.1.2.1.5.3 Recirculating water (where used), lb/h or gal/h 5.1
34、.2.1.5.4 Steam condensate (where used), lb/h 5.2 Equipment. Self-contained Humidifiers shall be tested using all components as recommended by the manufacturer. AHRI STANDARD 620 (I-P)-2014 4 5.3 Electrical Conditions. Nameplate voltages are shown in Table 1 of ANSI/AHRI Standard 110. Nameplate volta
35、ges for 50 Hz systems shall include one or more of the utilization voltages 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 thi
36、s standard, tests shall be performed at both voltages or at the lower voltage 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
37、air flow rate if so specified by the manufacturer. All power consumed by the fan(s) shall be included in the power input to the unit. All air flow rates shall be expressed in cfm. Section 6. Rating Requirements 6.1 Published Ratings. Published Ratings shall include Humidification Capacity, power inp
38、ut, and the energy input of Supplementary Heat. Humidification Capacity shall be expressed in terms of gal/day and stated to the nearest 0.1 gal/day. Power input shall be expressed in Btu/h stated to the nearest 20 Btu/h. Energy input of Supplementary Heat shall be expressed in Btu/h stated to the n
39、earest 100 Btu/h. Air flow rates shall be expressed in increments of 10 cfm. 6.2 Standard 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 R
40、ating Conditions Rating Name Rating Value Air temperature entering Self-contained Humidifier 75.0F Dry-bulb Temperature and 56.5F Wet-bulb Temperature Air velocity in humidifier test section (with Self-contained Humidifier not operating) 45 fpm Static pressure difference between inlet and outlet of
41、Self-contained Humidifier 0 in H2O Water pressure entering control valve 60.0 psig Water temperature entering control valve 60.0F 6.2.1 Supplementary Heat (Water) Test Conditions. Water pressure entering control valve . 15.0 psig Water temperature entering control valve 120F 6.2.2 Supplementary Heat
42、 (Steam) Test Conditions. Steam pressure entering control valve . 2.0 psig 6.3 Application Ratings. Ratings based on data determined by test requirements prescribed in Section 5 and conducted using Rating Conditions other than those specified in Section 6.2 shall be published as Application Ratings.
43、 6.4 Tolerances. To comply with this standard, measured test results shall not be less than 95% 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
44、input from this source shall not be more than the rated power input. Section 7. Minimum Data Requirements 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, gal/day 7.1.
45、2 Power input, Btu/h AHRI STANDARD 620 (I-P)-2014 5 7.1.3 Energy input of Supplementary Heat, Btu/h (where 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 acc
46、ordance with AHRI Standard 620 (I-P)”. All claims to ratings outside the scope of this standard shall include the statement “Outside the scope of AHRI Standard 620 (I-P)”. Wherever Application Ratings are published or printed, they shall include a statement of the conditions at which the ratings app
47、ly. Section 8. Operating Requirements 8.1 Operating Requirements. To comply with this standard, any production 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 spe
48、cified in the manufacturers installation instructions when operated at the Standard Rating Conditions specified 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
49、 or run off the Self-contained Humidifier under test. 8.2.2.2 After the test, the surface under or surrounding the Self-contained Humidifier shall be dry, provided that the surface temperature exceeds 42F. 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 shall be maintained at 20
