1、 2004 STANDARD for 4100 N. FAIRFAX DR., SUITE 200 ARLINGTON, VIRGINIA 22203 PERFORMANCE RATING OF LIQUID-LINE DRIERS Standard 710 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IH
2、S-,-,-Price $12.50 (M) $25.00 (NM) Printed in U.S.A. Copyright 2004, by Air-Conditioning and Refrigeration Institute Registered United States Patent and Trademark Office IMPORTANT SAFETY DISCLAIMER ARI does not set safety standards and does not certify or guarantee the safety of any products, compon
3、ents or systems designed, tested, rated, installed 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
4、for products covered by this standard/guideline. ARI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. ARI does not certify or guarantee that any tests conducted under its standards/guidelines will be non-hazardous or free from risk. No
5、te: This standard supersedes ARI Standard 710-86. Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE OF CONTENTS SECTION PAGE Section 1. Purpose1 Section 2. Scope.1 Sect
6、ion 3. Definitions 1 Section 4. Tubing Connections2 Section 5. Test Requirements 2 Section 6. Rating Requirements.2 Section 7. Minimum Data Requirements for Published Ratings .4 Section 8. Marking and Nameplate Data .4 Section 9. Conformance Conditions 4 TABLES Table 1. Applicable Refrigerant System
7、s .1 Table 2. Published Ratings .2 Table 3. Flow Rate per Ton of Refrigeration4 FIGURES Figure 1. Example of Water Capacity Rating Calculation for Refrigerant 134a at 75F 24C .5 APPENDICES Appendix A. References - Normative .6 Appendix B. References - Informative6 Appendix C. Guide for Selecting a L
8、iquid-line Drier - Informative.7 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with A
9、RINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STANDARD 710-2004 1PERFORMANCE RATING OF LIQUID-LINE DRIERS Section 1. Purpose 1.1 Purpose. The purpose of this standard is to establish for Liquid-line Driers: definitions; tubing connections; test requirements
10、; rating requirements; minimum data requirements for Published Ratings; 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, contractors and users. 1.1.2 Review and Amendment.
11、 This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to Liquid-line Driers utilizing solid Desiccants designed for use in the liquid line of all types of refrigeration and air-conditioning systems. 2.2 Applicability. This standar
12、d applies to Liquid-line Driers for use in refrigerant systems employing the halocarbon refrigerants listed in Table 1, as described in ANSI/ASHRAE Standard 34: Table 1. Applicable Refrigerant Systems Refrigerant Number Chemical Name Chemical Formula R-12 dichlorodifluoromethane CC12F2R-22 monochlor
13、odifluoromethane CHC1F2R-134a 1,1,1,2-tetrafluoroethane CH2FCF3R-245fa 1,1,1,3,3-pentafluoropropane CHF2CH2CF3R-404A Refrigerants 125/143a/134a 44.0/52.0/4.0 wt. CHF2CF3/ CH3CF3/ CH2FCF3R-407C Refrigerants 32/125/134a 23.0/25.0/52.0 wt. CH2F2/ CHF2CF3/ CH2FCF3R-410A Refrigerants 32/125 50.0/50.0 wt.
14、 CH2F2/ CHF2CF3R-502 Refrigerants 22/115 48.8/51.2 wt. CHC1F2/ CC1F2CF3R-507A Refrigerants 125/143a 50.0/50.0 wt. CHF2CF3/ CH3CF32.3 Exclusions. This standard does not apply to liquid anti-freeze solution Desiccants or driers used in the suction line or low side of refrigeration and air-conditioning
15、 systems. 2.4 Limitations. This standard provides a means of determining Water Capacity and Refrigerant Flow Capacity of a Liquid-line Drier at specified conditions. This standard does not attempt to reflect the performance of a Liquid-line Drier over the entire range of possible applications, There
16、fore, acid and particulate removal are not considered here. 2.4.1 Acid Removal. It is known that acid in a refrigeration system causes harmful corrosion. Many Liquid-line Driers will remove acids. However, there is no knowledge at the present time as to what concentration of various acids is allowab
17、le, nor how to test a Liquid-line Driers ability to remove these acids. Therefore, while noting its importance, no consideration of acid removal is given in this standard at this time. 2.4.2 Particulate Removal. Although many commercial Liquid-line Driers have filtering media, the subject of filtrat
18、ion is separate and distinct from the considerations of this standard. Therefore, the rating of a Liquid-line Drier is on the premise of a clean Liquid-line Drier and clean refrigerant. Section 3. Definitions All terms in this document shall follow the standard industry definitions in the current ed
19、ition of ASHRAE Terminology of Heating, Ventilation, Air Conditioning and Refrigeration unless otherwise defined in this section. 3.1 “As Received” Condition. This specifies the Liquid-line Drier as removed from the manufacturers packaging, without further reactivation or preparation. (Note: If info
20、rmation is desired with respect to the reactivation of a Liquid-line Drier, the user should consult the manufacturer for recommended reactivation procedure.) 3.2 Desiccant. A material that will collect and hold water. 3.3 Equilibrium Point Dryness (EPD). The lowest possible water content of liquid r
21、efrigerant attainable by a specific Liquid-line Drier. This is achieved at a specific temperature after it has collected a specific quantity of water when the two have been in contact until an equilibrium between the water in the refrigerant and the water in the Liquid-line Drier has been reached. E
22、PD is expressed in parts per million (ppm) by weight. 3.4 Liquid-line Drier. A manufactured device for use in the liquid line of refrigeration and air-conditioning systems. The primary purpose is to collect and hold, at its location, water Copyright Air-Conditioning and Refrigeration Institute Provi
23、ded by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STANDARD 710-2004 2 which is in excess of the amount which can be tolerated in the system. 3.5 Pressure Drop. The pressure difference between the inlet and the outlet of a Liquid-l
24、ine Drier, including its connections. 3.6 Published Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a Liquid-line Drier may be chosen to fit its application. These values apply to all Liquid-line Driers of like nominal size an
25、d type produced by the same manufacturer. The term Published Rating includes the rating of all performance characteristics shown on the component or published in specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.6.1 Application Rating. A r
26、ating based on tests performed at application Rating Conditions (other than Standard Rating Conditions).3.6.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.7 Rating Conditions. Any set of operating conditions under which a single level of performance results and
27、 which cause only that level of performance to occur. 3.7.1 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. 3.8 Refrigerant Flow Capacity. The refrigerating capacity for a flow of liquid refrigerant at specified conditions, which the Liq
28、uid-line Drier will pass and not exceed the specified Pressure Drop. 3.9 “Shall“ or “Should“. “Shall“ or “should“ shall be interpreted as follows: 3.9.1 Shall. Where “shall“ or “shall not“ is used for a provision specified, that provision is mandatory if compliance with the standard is claimed. 3.9.
29、2 Should. “Should“ is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.10 Temperature. The temperature, in F C, of the liquid refrigerant passing through the Liquid-line Drier. 3.11 Water Capacity. The amount of water which a Liquid-line Drier will coll
30、ect and hold, at each Rating Condition, and still maintain at equilibrium, a water content at or below a given concentration (EPD) in any of the liquid refrigerants. It shall be expressed in drops or in grams on the basis of 20 drops per gram. For the purpose of this standard, one drop of water per
31、pound of refrigerant 2 drops of water per kilogram of refrigerant is assumed to be equal to 110 ppm. Section 4. Tubing Connections 4.1 Tubing Connections. Dimensional specifications for flare or sweat connections of Liquid-line Driers shall be in accordance with ANSI/SAE Standard J513 and ANSI/ASME
32、Standard B16.22. Section 5. Test Requirements 5.1 Testing Procedure. Liquid-line Drier ratings shall be based on tests conducted in accordance with the procedure outlined in ANSI/ASHRAE Standard 63.1. 5.1.1 If alternate test methods are used, the tester assumes the responsibility that results so obt
33、ained can be confirmed by ANSI/ASHRAE Standard 63.1. Section 6. Rating Requirements 6.1 Rating Requirements. Liquid-line Driers shall be rated by their Water Capacity and Refrigerant Flow Capacity, and shall include their ratings at the Standard Rating Conditions in Table 2. Table 2. Published Ratin
34、gs Standard Rating Conditions Ratings Standard Temperature Water in Refrigerant EPD Water Capacity Refrigerant Flow Capacity at 1.0 psi 6.9 kPa Pressure Drop Refrigerant No. F C ppm drops tons kW 75 24 15 R-12 125 51.7 15 75 24 60 R-22 125 51.7 60 75 24 50 R-134a 125 51.7 50 75 24 50 R-245fa 125 51.
35、7 50 75 24 50 R-404A 125 51.7 50 75 24 50 R-407C 125 51.7 50 75 24 50 R-410A 125 51.7 50 75 24 30 R-502 125 51.7 30 75 24 50 R-507A 125 51.7 50 6.2 Water Capacity ratings shall be determined in accordance with the rating procedure outlined in 6.2.1 and statistical method outlined in 6.3. 6.2.1 Ratin
36、g Procedure. Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ARI STANDARD 710-2004 6.2.1.1 Preliminary. The preliminary Water Capacity of a Liquid-line Drier should be dete
37、rmined by the test procedure outlined in ASHRAE Standard 63.1. Two Liquid-line Driers for each Standard Rating Condition should be sufficient for this determination. 6.2.1.2 Procedure. Three Liquid-line Driers are then preloaded at this predetermined capacity. Duplicate EPD determinations are made f
38、or each Liquid-line Drier. The average EPD for each Liquid-line Drier and the overall average for the six determinations are then calculated. Another set of three Liquid-line Driers is then evaluated at an adjusted capacity, so that the overall average EPDs of the two sets will bracket the Standard
39、EPD. (Figure 1) 6.2.1.2.1 In this procedure, duplicate EPD determinations per Liquid-line Drier are required. This procedure reduces the effect of variations inherent in the method. Most important, it provides a check on the precision of the method. The maximum range for duplicate EPD determinations
40、 shall not exceed the following: R-123 ppm R-226 ppm R-134a6 ppm R-245fa.6 ppm R-404A.6 ppm R-407C.6 ppm R-410A.6 ppm R-5026 ppm R-507A.6 ppm 6.2.1.2.2 If the above range is exceeded, the test data shall be discarded, and the test shall be repeated after the analytical procedure has been reviewed. 6
41、.3. Statistical Method for Establishing Water Capacity Ratings. ANSI/ASHRAE Standard 63.1 gives a procedure for determining the Water Capacity of any refrigerant Liquid-line Drier. This sub-section presents a statistical procedure applied to the results from testing sets of samples of production Liq
42、uid-line Driers to establish a rating which will be equaled or exceeded by 90% of those produced. 6.3.1 When several determinations of the EPD of a single Liquid-line Drier are made by the procedure of ANSI/ASHRAE Standard 63.1, a series of values will be obtained because of analysis procedure varia
43、tions. The average of these results is more reliable than any single result. This average also becomes more reliable as more values are used in calculating the average. 6.3.2 When the average EPD of a second Liquid-line Drier is calculated from several determinations, this value may differ from the
44、average of the first Liquid-line Drier because of manufacturing variations. The overall average of the two Liquid-line Driers is more representative of production Liquid-line Driers than is the average of a single Liquid-line Drier. The overall average of several Liquid-line Driers is still more rep
45、resentative. 6.3.3 In order to compensate for these testing and manufacturing variations, a statistical procedure is available for arriving at a rating that will guarantee any percent compliance desired. 6.3.4 This rating procedure is a statistical analysis of results obtained from tests on a group
46、of six Liquid-line Driers, and the rating obtained by this procedure will be such that the average Water Capacity of duplicate tests on any set of six Liquid-line Driers will equal or exceed the rating in 90% of all cases. 6.3.4.1 The two EPD set averages are plotted on a graph, plotting capacity on
47、 the vertical axis and EPD on the horizontal axis. A straight line is drawn between these two points. A vertical line is drawn from the Standard EPD to the straight line. A horizontal line is then drawn from the point of intersection to the vertical axis. This point of intersection with the vertical
48、 axis gives the “set average“ at Standard EPD. (Figure 1) 6.3.4.2 The six individual “duplicate averages“ are now plotted on the same graph. The vertical distance of each point from the straight line is determined in units of capacity. The maximum value above the line is added to the maximum value b
49、elow the line. The sum of these values is called the “range.“ 6.3.4.3 By using the “set average,“ the “range“, and a multiplication factor of 0.36 taken from statistical tables, the Water Capacity rating is calculated as follows: Water Capacity rating = A - 0.36r Where: A = set average r = range 6.3.4.4 When Liquid-line Driers are preloaded at the rated Wa
