1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 979 Water Treatment Appliances STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHOR
2、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Water Treatment Appliances, UL 979 Second Edition, Dated September 29, 2016 Summary of Topics This new edition of Standard for Water Treatment Appliances, UL 979 includes the following changes: Additi
3、on of specications for Safety Critical Functions Addition of requirements for electronic circuits Update ofrequirements for switches The new/revisedrequirements are substantially in accordance with Proposal(s) on this subject dated February 22, 2016 and April 18, 2016. All rights reserved. No part o
4、f this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, includi
5、ng but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the
6、 inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this standard, regardless of the form of the claim. Users of the electronic versions of ULs
7、 Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic standard on the purchasers
8、computer system. SEPTEMBER 29, 2016 UL 979 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 29, 2016 UL 979 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
9、N FROM UL SEPTEMBER 29, 2016 1 UL 979 Standard for Water Treatment Appliances First Edition May, 2005 Second Edition September 29, 2016 This UL Standard for Safety consists of the Second Edition. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Prop
10、osals 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 a Standard should be altered in any way. All of ULs Standards and all copyrights, owne
11、rships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL
12、979 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 Glossary .7 3 Safety Critical Functions .11 4 Units of Measurement 12 5 Undated References .12 CONSTRUCTION 6 Components 12 6.1 Gene
13、ral 12 6.2 Attachment plugs, receptacles, connectors, and terminals 14 6.3 Batteries and battery chargers 15 6.4 Boxes and raceways .16 6.5 Capacitors and lters 16 6.6 Controls 16 6.7 Cords, cables, and internal wiring .21 6.8 Cooling fan .21 6.9 Film-coated wire (magnet wire) 22 6.10 Gaskets and se
14、als .22 6.11 Ground-fault, arc-fault, and leakage current detectors/interrupters 22 6.12 Heaters and heating elements .23 6.13 Insulation systems 23 6.14 Light sources and associated components 23 6.15 Marking and labeling systems 24 6.16 Motors and motor overload protection .24 6.17 Overcurrent pro
15、tection 27 6.18 Polymeric materials .27 6.19 Power supplies .28 6.20 Printed wiring boards .28 6.21 Semiconductors and small electrical and electronic components .29 6.22 Supplemental insulation, insulating bushings, and assembly aids .30 6.23 Switches 30 6.24 Transformers 31 6.25 Valves (electrical
16、ly operated) and solenoids .31 6.26 Water pumps 32 6.27 Power-switching semiconductors (mounted to accessible metal parts) 32 6.28 Thermistors 32 7 General .32 8 Frame and Enclosure 33 9 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts 38 10 Protection Against Corrosion .4
17、4 11 Exposure to Water 46 12 Mechanical Assembly .47 13 Supply Connections Cord Connected Appliances .47 13.1 General .47 13.2 Strain relief 48 13.3 Bushings 49 14 Supply Connections Permanently-Connected Appliances 50 SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL 979 3UL COPYRIGHTED MATERIAL N
18、OT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 14.1 General .50 14.2 Terminal compartment 50 14.3 Wiring terminals and leads 51 14.4 Identied terminals and leads 52 15 Grounding .52 15.1 General .52 15.2 Identication .53 16 Live Parts 54 17 Electrical Insulation .5
19、5 18 Internal and External Wiring and Connections 56 19 Tabs Used in Electrical Quick-Connect Terminals .57 19.1 General .57 19.2 Material requirements .58 19.3 Dimensional requirements .58 20 Separation of Circuits .63 20.1 Separation between different internal wiring circuits (factory-installed co
20、nductors) 63 20.2 Separation between different eld wiring circuits (eld-installed conductors) .64 20.3 Separation between eld wiring circuits (eld-installed conductors) and internal wiring circuits (factory-installed conductors) 65 20.4 Segregation methods .67 20.5 Separation methods 67 21 Spacings
21、68 21.1 General .68 21.2 Low-voltage and isolated limited-energy circuits 71 21.3 High-voltage circuits 71 22 Spacings On Printed Wiring Boards 72 23 Capacitors .73 24 Lampholders .73 25 Parts Subject to Pressure 74 26 Pressure-Relief Devices .75 27 Switches and Controls .76 28 Controls End Product
22、Test Parameters 77 28.1 General .77 28.2 Auxiliary controls .77 28.3 Operating controls (regulating controls) .78 28.4 Protective controls (limiting controls) 79 29 Electronic Circuits Evaluated to UL 60335-1 Based Requirements .81 29.1 Identication of Safety Critical Circuit Functions 81 29.2 Prote
23、ctive electronic circuits .82 29.3 Operating circuits that mitigate a dangerous malfunction of the appliance .82 29.4 Evaluation of the different types of electronic circuits .82 29.5 Circuits that provide Safety Critical Functions 83 30 Transformers and Power Supplies 83 31 Switch Mode Power Suppli
24、es 84 31.1 Bridging components switch mode power supplies 84 31.2 Transformer insulation system .84 32 Seals, Gaskets, and Diaphragms .84 33 Motors .85 33.1 Construction .85 33.2 Brush wear out .85 33.3 Overload protection .85 34 Arc-Fault and Leakage Current Detectors / Interrupters 86 35 Adhesives
25、 Used to Secure Parts .86 SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL 979 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 36 Double Insulation .87 PERFORMANCE 37 General 87 38 Power Input Test .88 39 Leakage Current Test .88 40 Leaka
26、ge Current Following Humidity Conditioning Test 88 41 Resistance of Grounding Test 88 42 Temperature Test .89 43 Burnout Test .94 44 Dielectric Voltage-Withstand Test .94 44.1 General .94 44.2 Induced potential test .95 45 Abnormal Operation Tests .96 45.1 General .96 45.2 Component breakdown test .
27、97 45.3 No water test 97 45.4 Ventilation fan test .97 45.5 Switch mode power supplies .97 46 Tests for Circuits Evaluated to UL 60335-1 Based Requirements 98 46.1 General conditions for the tests 98 46.2 General conditions for the tests 98 46.3 Test results determined by overcurrent protection oper
28、ation .99 46.4 Low-Power Circuits .99 46.5 Abnormal operation and fault tests 101 46.6 Programmable component reduced supply voltage test 102 46.7 Electromagnetic Compatibility (EMC) requirements - immunity 103 47 Rain Test .104 48 Ozone Test .107 49 Reservoir Overow Test 107 50 Cleaning Test .108 5
29、1 Strain-Relief Test 108 52 Push-Back Relief Test 108 53 Output or Interconnecting Cable Strain-Relief Test .109 54 Hydrostatic Strength Test .109 55 Metallic Coating Thickness Test .109 56 Ultraviolet Irradiance Test .111 57 Switch and Control Overload Test .111 58 Operational Test .111 59 Radiatio
30、n Test .112 60 Electrolytic Capacitor Test 112 61 Printed-Wiring Board Shorted-Trace Test .112 62 Tempered Glass Impact Test .113 63 Leakage-Current Water Test 113 64 Submersion Test 114 MANUFACTURING AND PRODUCTION TESTS 65 Production Line Dielectric Voltage-Withstand Test .114 66 Production-Line G
31、rounding-Continuity Test .116 RATING SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL 979 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 67 Details .116 MARKING 68 Details .116 INSTALLATION INSTRUCTIONS 69 Details .119 SEPTEMBER 29, 2016
32、 WATER TREATMENT APPLIANCES - UL 979 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electrically operated water treatment appliances for household and commercial use. These appliances are i
33、ntended 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, lters, ultraviolet radiation, ozone gene
34、ration, 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 cover appliances for use in hazardou
35、s 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 2.1 For the purpose of this standard the following denitions apply. 2.2 APPLIANCE A collective term to designate all products c
36、overed by this Standard. 2.3 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). 2.4 APPLIANCE INLET (MOTOR ATTACHMENT PLUG) A male contact device mounted on
37、an end product appliance to provide an integral blade conguration for the connection of an appliance coupler or cord connector. 2.5 APPLIANCE, PERMANENTLY-CONNECTED An appliance intended to be permanently connected electrically. 2.6 APPLIANCE (FLATIRON) PLUG An appliance coupler type of device havin
38、g a cord guard and a slot conguration specied for use with heating or cooking appliances. 2.7 APPLIANCE, PORTABLE An appliance with the following characteristics: a) The appliance is cord- and plug-connected; b) The operating literature and installation instructions illustrate connecting the water l
39、ines to the output of a sink-type faucet. The connection to the sink-type faucet does not require tools, or the appliance is provided with its own water container; c) The operating literature and installation instructions do not portray placing the appliance under the cabinet or a dedicated space, a
40、nd 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. SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL 979 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
41、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.8 APPLIANCE, STATIONARY An appliance connected to plumbing and not expected to be moved except during servicing or storage. A stationary appliance may have wheels or casters. 2.9 BARRIER A partition for the insulation or isolation of
42、electric circuits, for the isolation of electric arcs, or for isolation of moving parts or hot surfaces. In this respect, a barrier may serve as a portion of an enclosure or as a functional part. 2.10 CAPACITOR, CLASS X Capacitor or RC unit of a type suitable for use in situations where failure of t
43、he 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 phase to phase or phase to neutral. Notes: 1) X1 capacitors are generally used in circuits of permanently connected appliances. However, if the appliance is provid
44、ed with a separate surge protective device that limits the impulse voltage to 2.5KV, an X2 capacitor is permitted. 2) X2 capacitors are generally used in circuits of cord-connected appliances. 2.11 CAPACITOR, CLASS Y Capacitor or RC unit of a type suitable for use in situations where failure of the
45、capacitor could lead to danger of electric shock. Examples would be capacitors connected across the primary 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 wh
46、ere the prevention of electric shock is afforded solely by the isolation provided by the capacitor. Two Y2 capacitors 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 com
47、bination of the capacitor and earth ground for circuits operating at voltages 150V and 300V. 3) Y4 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. 2.12 CIRCUIT, HIGH-VOLTAGE A circuit
48、 involving a potential of more than 600 V. 2.13 CIRCUIT, LINE-VOLTAGE A circuit involving a potential of not more than 600 V and having circuit characteristics in excess of those of a low-voltage circuit. 2.14 CIRCUIT, LOW-VOLTAGE A circuit involving a peak open-circuit potential of not more than 42
49、.4 V supplied by a primary battery, by a Class 2 transformer, or by a combination of a transformer and a xed impedance that as a unit, complies with all performance requirements for a Class 2 transformer. A circuit derived from a line-voltage circuit by connecting a resistance in series with the supply circuit as a means of limiting the voltage and current, is not considered to be a low-voltage circuit. SEPTEMBER 29, 2016 WATER TREATMENT APPLIANCES - UL 979 8UL COPYRIGHTED MATER
