1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 979 Water Treatment AppliancesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
2、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Water Treatment Appliances, UL 979 First Edition, Dated May 11, 2005 Summary of Topics This revision to UL 979 is being issued to include the following requirements: Update to Capacitor Requirements Update to address swi
3、tch mode power supplies Editorial updates Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating
4、 the date of publication or the date on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated November 26, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system
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9、ct, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Stand
10、ard, and are preceded by a SUPERSEDED REQUIREMENTS notice. FEBRUARY 4, 2014 UL 979 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 4, 2014 UL 979 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
11、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL May 11, 2005 (Title Page Reprinted: February 4, 2014) 1 UL 979 Standard for Water Treatment Appliances First Edition May 11, 2005 This UL Standard for Safety consists of the First Edition including revisions through February 4, 2014. Comments or propos
12、als for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of
13、a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
14、IBUTION WITHOUT PERMISSION FROM UL FEBRUARY 4, 2014 WATER TREATMENT APPLIANCES - UL 979 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .5 3 Components 7 4 Units of Measuremen
15、t .7 5 Undated References 7 CONSTRUCTION 5A Components 7 5A.1 General 7 5A.2 Attachment plugs, receptacles, connectors, and terminals 8A 5A.3 Batteries and battery chargers .8B 5A.4 Boxes and raceways .8E 5A.5 Capacitors and lters .8E 5A.6 Controls 8F 5A.7 Cords, cables, and internal wiring .8I 5A.8
16、 Cooling Fan .8J 5A.9 Film-coated wire (magnet wire) 8J 5A.10 Gaskets and seals 8J 5A.11 Ground-fault, arc-fault, and leakage current detectors/interrupters .8J 5A.12 Heaters and heating elements 8K 5A.13 Insulation systems 8K 5A.14 Light sources and associated components .8K 5A.15 Marking and label
17、ing systems 8L 5A.16 Motors and motor overload protection .8L 5A.16.4 Motor overload protection 8N 5A.17 Overcurrent protection 8O 5A.18 Polymeric materials .8O 5A.19 Power supplies .8P 5A.20 Printed wiring boards 8P 5A.21 Semiconductors and small electrical and electronic components .8Q 5A.22 Suppl
18、emental insulation, insulating bushings, and assembly aids .8R 5A.23 Switches 8R 5A.24 Transformers .8S 5A.25 Valves (electrically operated) and solenoids 8T 5A.26 Water Pumps .8T 5A.27 Power-switching semiconductors (mounted to accessible metal parts) .8T 5A.28 Thermistors 8T 6 General 8U 7 Frame a
19、nd Enclosure 8U 8 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts 14 9 Protection Against Corrosion 20 10 Exposure to Water 22 11 Mechanical Assembly .23 12 Supply Connections Cord Connected Appliances .23 12.1 General .23 12.2 Strain relief 24 12.3 Bushings 25 FEBRUARY 4
20、, 2014 WATER TREATMENT APPLIANCES - UL 979 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 13 Supply Connections Permanently-Connected Appliances 26 13.1 General .26 13.2 Terminal compartment 26 13.3 Wiring terminals and leads 27 13.4 Ident
21、ied terminals and leads 28 14 Grounding .28 14.1 General .28 14.2 Identication .29 15 Live Parts 30 16 Electrical Insulation .31 17 Internal and External Wiring and Connections 32 17A Tabs Used in Electrical Quick-Connect Terminals 32A 17A.1 General 32A 17A.2 Material requirements 32B 17A.3 Dimensio
22、nal requirements 32B 18 Separation of Circuits .33 18.1 Separation between different internal wiring circuits (factory-installed conductors) 33 18.2 Separation between different eld wiring circuits (eld-installed conductors) .34 18.3 Separation between eld wiring circuits (eld-installed conductors)
23、and internal wiring circuits (factory-installed conductors) 35 18.4 Segregation methods .37 18.5 Separation methods 37 19 Spacings 38 19.1 General .38 19.2 Low-voltage and isolated limited-energy circuits 41 19.3 High-voltage circuits 41 19A Spacings On Printed Wiring Boards .42 20 Capacitors 42A 21
24、 Lampholders .43 22 Parts Subject to Pressure 43 23 Pressure-Relief Devices .44 24 Switches and Controls .44A 24A Controls End Product Test Parameters .44B 24A.1 General 44B 24A.2 Auxiliary controls 44B 24A.3 Operating Controls (regulating controls) 44B 24A.4 Protective controls (limiting controls)
25、.44D 24A.4.5 Controls using a temperature sensing device 44F 25 Transformers and Power Supplies .44F 25A Switch Mode Power Supplies 44F 25A.1 Bridging components switch mode power supplies .44F 25A.2 Transformer insulation system 45 26 Seals, Gaskets, and Diaphragms .45 27 Motors .45 27.1 Constructi
26、on .45 27.2 Brush wear out .46 27.3 Overload protection .46 27A Arc-Fault and Leakage Current Detectors / Interrupters .46A 28 Adhesives Used to Secure Parts 46A 29 Double Insulation .47 FEBRUARY 4, 2014 WATER TREATMENT APPLIANCES - UL 979 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC
27、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 30 General 47 31 Power Input Test .49 32 Leakage Current Test .50 33 Leakage Current Following Humidity Conditioning Test 50 34 Resistance of Grounding Test 50 35 Temperature Test .51 36 Burnout Test .56 37 Dielectric Voltage-Withstand Test
28、 .56 37.1 General .56 37.2 Induced potential test .57 38 Abnormal Operation Tests .58 38.1 General .58 38.2 Component breakdown test 58A 38.3 No water test .58A 38.4 Ventilation fan test 58A 38.5 Switch mode power supplies .58A 39 Rain Test .58B 40 Ozone Test .62A 41 Reservoir Overow Test 62B 42 Cle
29、aning Test .62B 43 Strain-Relief Test .63 44 Push-Back Relief Test .64A 45 Output or Interconnecting Cable Strain-Relief Test 65 46 Hydrostatic Strength Test 65 47 Metallic Coating Thickness Test 65 48 Ultraviolet Irradiance Test 67 49 Switch and Control Overload Test 67 50 Operational Test 68 51 Ra
30、diation Test 68 52 Electrolytic Capacitor Test .68 53 Printed-Wiring Board Shorted-Trace Test 68 54 Tempered Glass Impact Test .69 55 Leakage-Current Water Test .69 56 Submersion Test .70 MANUFACTURING AND PRODUCTION TESTS 57 Production Line Dielectric Voltage-Withstand Test 70 58 Production-Line Gr
31、ounding-Continuity Test .72 RATING 59 Details .72 MARKING 60 Details .72 INSTALLATION INSTRUCTIONS 61 Details .75 FEBRUARY 4, 2014 WATER TREATMENT APPLIANCES - UL 979 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX A FEBRUARY 4, 2
32、014 WATER TREATMENT APPLIANCES - UL 979 4BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope Section 1 effective May 12, 2008 1.1 These requirements cover electrically operated water treatment appliances for household and c
33、ommercial use. These appliances are intended for installation and use in accordance with the National Electrical Code, NFPA 70, and are rated 600 V or less. 1.2 These requirements cover appliances utilizing features that treat water through the use of cation exchange water softeners, ionization, lte
34、rs, ultraviolet radiation, ozone generation, and reverse osmosis. 1.3 These requirements do not cover water treatment appliances for use with pools or spas, water distillers, aquariums, or other equipment connected to plumbing that is covered by individual requirements. 1.4 These requirements do not
35、 cover appliances for use in hazardous locations as dened in the National Electrical Code, NFPA 70. 1.5 These requirements do not cover the aesthetic effects or the effectiveness of water treatment. 2 Glossary Section 2 effective May 12, 2008 2.1 For the purpose of this standard the following deniti
36、ons apply. 2.2 APPLIANCE A collective term to designate all products covered by this Standard. 2.2.1 APPLIANCE COUPLER A single-outlet, female contact device for attachment to a exible cord as part of a detachable power-supply cord to be connected to an appliance inlet (motor attachment plug). 2.2.1
37、 added October 22, 2012 2.2.2 APPLIANCE INLET (MOTOR ATTACHMENT PLUG) A male contact device mounted on an end product appliance to provide an integral blade conguration for the connection of an appliance coupler or cord connector. 2.2.2 added October 22, 2012 2.3 APPLIANCE, PERMANENTLY-CONNECTED An
38、appliance intended to be permanently connected electrically. 2.3.1 APPLIANCE (FLATIRON) PLUG An appliance coupler type of device having a cord guard and a slot conguration specied for use with heating or cooking appliances. 2.3.1 added October 22, 2012 2.4 APPLIANCE, PORTABLE An appliance with the f
39、ollowing characteristics: a) The appliance is cord- and plug-connected; b) The operating literature and installation instructions illustrate connecting the water lines to the output of a sink-type faucet. The connection to the sink-type faucet does not require tools, or the appliance is provided wit
40、h its own water container; FEBRUARY 4, 2014 WATER TREATMENT APPLIANCES - UL 979 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL c) The operating literature and installation instructions do not portray placing the appliance under the cabinet
41、 or a dedicated space, and they only illustrate placing the appliance on a counter top near the sink; and d) The appliance has feet or keyhole slots and does not have non-keyhole slots or other more permanent mounting means. 2.5 APPLIANCE, STATIONARY An appliance connected to plumbing and not expect
42、ed to be moved except during servicing or storage. A stationary appliance may have wheels or casters. 2.6 BARRIER A partition for the insulation or isolation of electric circuits, for the isolation of electric arcs, or for isolation of moving parts or hot surfaces. In this respect, a barrier may ser
43、ve as a portion of an enclosure or as a functional part. 2.6.1 CAPACITOR, CLASS X Capacitor or RC unit of a type suitable for use in situations where failure of the capacitor or RC unit would not lead to danger of electrical shock but could result in a risk of re. Examples would be units connected p
44、hase to phase or phase to neutral. Notes: 1) X1 capacitors are generally used in circuits of permanently connected appliances. However, if the appliance is provided with a separate surge protective device that limits the impulse voltage to 2.5KV, an X2 capacitor is permitted. 2) X2 capacitors are ge
45、nerally used in circuits of cord-connected appliances. 2.6.1 added February 4, 2014 2.6.2 CAPACITOR, CLASS Y Capacitor or RC unit of a type suitable for use in situations where failure of the capacitor could lead to danger of electric shock. Examples would be capacitors connected across the primary
46、and secondary circuits where electrical isolation is required to prevent an electric shock or between hazardous live parts and accessible parts. Notes: 1) Y1 capacitors are used in circuits where the prevention of electric shock is afforded solely by the isolation provided by the capacitor. Two Y2 c
47、apacitors connected in series is considered to provide the same level of protection as one Y1 capacitor. 2) Y2 capacitors are used where the prevention of electric shock is provided by the combination of the capacitor and earth ground for circuits operating at voltages 150V and 300V. 3) Y4 capacitor
48、s are used where the prevention of electric shock is provided by the combination of the capacitor and earth ground for circuits operating at voltages 150V. 2.6.2 added February 4, 2014 2.7 CIRCUIT, HIGH-VOLTAGE A circuit involving a potential of more than 600 V. 2.8 CIRCUIT, LINE-VOLTAGE A circuit i
49、nvolving a potential of not more than 600 V and having circuit characteristics in excess of those of a low-voltage circuit. FEBRUARY 4, 2014 WATER TREATMENT APPLIANCES - UL 979 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.9 CIRCUIT, LOW-VOLTAGE A circuit involving a peak open-circuit potential of not more than 42.4 V supplied by a primary battery, by a Class 2 transformer, or by a combination of a transformer and
