1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 998 Humidiers STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
2、REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Humidiers, UL 998 Fifth Edition, Dated April 25, 2011 Summary of Topics Revision to allow additional VW-1 rated insulating materials Conductor size of internal wire Revision to allow power input in amperes, watts, or
3、kilowatts for input test Addition of grounding symbol New supplement SA - smart enabled humidiers Updated references to UL Standards The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated October 9, 2015 and December 25, 2015 Text that has been changed in
4、 any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or othe
5、rwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including 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,
6、 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 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 f
7、or any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonab
8、le attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. APRIL 4, 2016 UL 998 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 4, 2016 UL
9、 998 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group CSA C22.2 No. 104-11 Fourth Edition Underwriters Laboratories Inc. UL 998 Fifth Edition Humidiers April 25, 2011 (Title Page Reprinted: April 4, 2016) ANS
10、I/UL 998-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Association (operating as “CSA Group”), and Underwriters Laboratories Inc. (UL). Comments or pro
11、posals for revisions on any part of the standard may be submitted to CSA Group or UL at anytime. Revisions to this standard will be made only after processing according to the standards development procedures of CSA Group and UL. CSA Group and UL will issue revisions to this standard by means of a n
12、ew edition or revised or additional pages bearing their date of issue. ISBN 978-1-55491-623-8 2016 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to review ve years from the d
13、ate of publication, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, t
14、able, and/or gure number; wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2016 Underwriters Laboratories Inc. ULs Standards
15、 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, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. This ANSI/UL Standard for Safety consists
16、 of the Fifth Edition including revisions through April 4, 2016. The most recent designation of ANSI/UL 998 as an American National Standard (ANSI) occurred on April 4, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface.
17、 Comments or proposals 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:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-fre
18、e 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PREFACE 6 INTRODUCTION 1 Scope .7 2 Denitions 7 3 General 9 3.1 Components .9 3.2 Reference publications .10 3.3 Units of measurement 10B 3.4 Terminology 11 CONSTRUCTI
19、ON 4 General .11 5 Enclosures 11 5.1 General 11 5.2 Nonmetallic materials 13 5.3 Enclosure integrity .14 6 Doors and Covers .15 7 Accessibility of Uninsulated Hazardous Voltage Live Parts and Film-Coated Wire 16 8 Protection Against Risk of Injury to Persons Mechanical Protection 17 9 Protection Aga
20、inst Risk of Injury to Persons Materials 18 10 Protection Against Risk of Injury to Persons Switches, Controls, and Interlocks .18 11 Protection Against Risk of Injury to Persons Surface Temperatures .20 12 Stability 20 13 Strength of Handles .20 14 Strength of Mounting 20 15 Mechanical Assembly .21
21、 16 Liquid-Containing Parts 21 17 Protection Against Corrosion .22 18 Cord-Connected Products .22 19 Permanently Connected Products .23 20 Leads and Terminals 24 21 Flexible Cords 26 22 Strain Relief 27 23 Bushings 28 24 Current-Carrying Parts .28A 25 Internal Wiring 28A 26 Protection of Wiring 28B
22、27 Wiring Connections 28B 28 Electrical Insulation .29 29 Separation of Circuits .31 30 Secondary Circuits 33 30.1 General .33 30.2 Extra-low-voltage circuits 33 31 Grounding .34 31.1 General .34 31.2 Permanently connected products .35 31.3 Cord-connected products 36 APRIL 4, 2016 CSA C22.2 NO. 104-
23、11 UL 998 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 31.4 Bonding of internal parts 36 32 Bonding Means .37 33 Capacitors .38 34 Coil Windings 38 35 Heating Elements .39 36 Motors .39 36.1 General .39 36.2 Motor overload protection .40
24、 36.3 Short circuit protection 42 37 Overcurrent Protection 42 38 Protection Against Overheating .43 39 Receptacles 45 40 Switches and Controllers 45 41 Electrically Operated Valves and Solenoids 46 42 Spacings 46 43 Thermal Insulation 47 44 Wetting Live Parts 48 45 Internal Plumbing .48 46 Filters
25、.48 47 Pressure Vessels and Parts Subjected to Pressure .48 48 Protection of Service Personnel 50 48.1 General .50 48.2 Construction .51 49 Duct- and Plenum-Mounted Products .53 50 Construction of Duct- and Plenum-Mounted Products .53 50.1 Installation .53 50.2 Polymeric material 53 50.3 Evaporation
26、 pad .54 50.4 Supply cord .54 PERFORMANCE 51 General Test Parameters 54 51.1 General .54 51.2 Voltage .55 51.3 Ambient temperatures 55 52 Leakage-Current Test .55 53 Humidity-Conditioning Test .56 54 Operation Test .57 55 Starting Test .57 56 Input Test 57 57 Normal-Temperature Test 58 57.1 All prod
27、ucts 58 57.2 Duct- or plenum-mounted products .61 58 Disassembly and Reassembly Test .61 59 Impact .61 60 Rotating Members 62 61 Dielectric Voltage-Withstand Test .62 62 Strain-Relief Test .63 62.1 General .63 62.2 Through-cord switch 63 63 Power-Supply Cord Push-Back Relief Test .63 64 Cable-Clamp
28、Test 63 APRIL 4, 2016 CSA C22.2 NO. 104-11 UL 998 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 65 Abnormal Operation Test 64 65.1 General .64 66 Thermal Cutoff Test .64 67 Gasket Test 64 68 Liquid-Container Test .65 69 Flooding of Live P
29、arts Test 65 70 Backow Test 66 71 Bonding-Conductor Test .67 72 Tests on Parts Subject to Pressure .67 73 Mold Stress-Relief Test 68 RATINGS 74 Electrical Ratings .69 MARKING AND INSTRUCTIONS 75 Identication and Ratings 69 76 Informational and Instructional Markings .73 77 Operating Instructions .73
30、 78 Field Wiring 74 TABLES AND FIGURES Tables 76 Figures .87 SUPPLEMENT SA - SMART ENABLED HUMIDIFIERS SA1 Scope .97 SA2 Construction 98 SA2.1 Controls .98 SA2.2 Separation of circuits 99 SA2.3 Communication and display devices 99 SA2.4 Communication conductors and cables .100 SA2.5 Communication co
31、nnectors .100 SA2.6 Smart enabled or remote operation 100 SA3 Functional Safety 101 SA4 Resistance to Electro Magnetic Phenomena (Immunity) 101 SA5 Markings and Instructions 102 Annex A Standards for components Annex B French translations and markings Annex C Manufacturing and Production Tests APRIL
32、 4, 2016 CSA C22.2 NO. 104-11 UL 998 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PREFACE This is the harmonized CSA Group and UL Standard for Humidiers. It is the fourth edition of CSA-C22.2 No. 104 and the fth edition of UL 998. This h
33、armonized standard has been jointly revised on April 4, 2016. For this purpose, CSA Group and UL are issuing revision pages dated April 4, 2016. This harmonized Standard was prepared by CSA Group and Underwriters Laboratories Inc. (UL). The efforts and support of the Air Conditioning and Refrigerati
34、on Institute (ARI) and the Heating, Refrigerating and Air Conditioning Institute of Canada (HRAI) are gratefully acknowledged. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was reviewed by the CSA Subcommittee on Humidie
35、rs, under the jurisdiction of the CSA Technical Committee on Consumer and Commercial Products and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the American National Standards
36、Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a specic number of samples to be tested, the specied number is considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important
37、 to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of Harmonization This standard uses the IEC format but is not based on, nor is it considered equivalent to, an IEC standard. This standard is published as an identica
38、l standard for CSA Group and UL. An identical standard is a standard that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Interpretations The interpretat
39、ion by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been
40、identied, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. APRIL 4, 2016 CSA C22.2 NO. 104-11 UL 998 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL HUM
41、IDIFIERS INTRODUCTION 1 Scope 1.1 These requirements cover humidiers rated 600 V or less, and intended to be used in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, and the Rules of the Canadian Electrical Code (CEC), Part I, C22.1. 1.2 These requirements cover humidiers intended f
42、or residential and commercial use. This includes humidiers of the centrifugal atomizing type, evaporative-media type, water-injection type, steam type, and the like. The humidiers may be for installation in a room, mounted on a wall or a ceiling, or for duct or plenum mounting. 1.3 These requirement
43、s apply to equipment that includes an electric heating element to heat air or water, or both. 1.4 These requirements do not apply to evaporative coolers that are also intended to be used for cooling. 1.5 These requirements do not apply to portable, electrode-type products, such as vaporizers, which
44、are covered by the Standard for Electric Heating Appliances, UL 499, and the CSA Standard for Household Cooking and Liquid-Heating Appliances, CAN/CSA-C22.2 No. 64. 2 Denitions 2.1 The following denitions apply in this Standard: Circuit, extra-low-voltage A circuit that has an ac potential of not mo
45、re than 30 V (42.4 peak), and power of 100 VA or less; or 30 V dc supplied by a primary battery; or supplied by a Class 2 transformer; or supplied by a combination of a transformer and xed impedance that, as a unit, complies with all the performance requirements for a Class 2 transformer. A circuit
46、that is derived from a circuit which exceeds 30 V by connecting resistance or impedance, or both, in series with the supply circuit to limit the voltage and current, is not considered to be an extra-low-voltage circuit. Circuit, hazardous voltage A circuit having characteristics in excess of those o
47、f an extra-low-voltage circuit. Combination temperature-regulating and temperature-limiting thermostat A thermostat whose function is to regulate the temperature under normal conditions of use, and that also serves to prevent a hazard that might result from conditions of abnormal operation of the he
48、ater. Enclosure The enclosure that houses the electrical components, live parts and/or moving parts. It may be an integral part of the component, a separate item, part of the ultimate enclosure, or the ultimate enclosure (e.g., the outer cabinet). Heater element A complete or partial assembly of a h
49、eating element, an electrical insulation (e.g., refractory, mica), a metal sheath, a glass or quartz envelope or panel, thermal insulation, and a frame or adaptor for holding the assembly together and fastening it in the heater; and leads or terminal connections, or both, which may or may not include bolts and nuts. APRIL 4, 2016 CSA C22.2 NO. 104-11 UL 998 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOU
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