UL 1453-2016 UL Standard for Safety Electric Booster and Commercial Storage Tank Water Heaters (Sixth Edition Reprint with Revisions Through and Including May 18 2018).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1453 Electric Booster and Commercial Storage Tank Water Heaters STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULU

2、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Booster and Commercial Storage Tank Water Heaters, UL 1453 Sixth Edition, Dated March 29, 2016 Summary of Topics This new edition to ANSI/UL 1453 is being iss

3、ued to clarify water heater control safety critical functions and editorial updates. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated November 20, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval sy

4、stem, 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, including but not limited to, the implied warranties of merchantabili

5、ty 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 inability to use this Standard, even if UL or an authorized U

6、L 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 Standards for Safety agree to defend, indemnify, and hold UL

7、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 computer system. MARCH 29, 2016 UL 1453 tr1UL COPYRIGHTED MATE

8、RIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 29, 2016 UL 1453 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL March 29, 2016 1 UL 1453 Standard for Electric Booster and

9、 Commercial Storage Tank Water Heaters First Edition April, 1979 Second Edition July, 1982 Third Edition February, 1988 Fourth Edition September, 1995 Fifth Edition June, 2004 Sixth Edition March 29, 2016 This ANSI/UL Standard for Safety consists of the Sixth edition. The most recent designation of

10、ANSI/UL 1453 as an American National Standard (ANSI) occurred on March 29, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be sub

11、mitted 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, ownerships, and rights

12、regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 1453-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 29, 2016 UL 1453 2 No Text on This PageUL COPY

13、RIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 Components 7 3 Units of Measurement .7 4 Undated References 7 5 Glossary .7 CONSTRUCTION 6 Frame and Enclosure 9 6.1 General .9 6.2 Enclosure materials .9 6.3 Emissi

14、on of burning particles or molten metal .13 6.4 Accessibility of live parts .15 6.5 Ventilation openings .17 7 Heating Element Accessories .17 8 Doors and Covers .18 9 Mechanical Assembly 20 10 Corrosion Resistance .21 11 Supply Connections Permanent Connection 21 11.1 General .21 11.2 Wiring compar

15、tments .22 11.3 Field wiring terminals and leads 23 12 Supply Connections Cord Connection .25 12.1 Supply cord .25 12.2 Bushings 26 12.3 Strain relief 26 12.4 Pin terminals .27 13 Current-Carrying Parts 28 14 Internal Wiring 28 14.1 General .28 14.2 Methods 29 15 Splices 30 16 Separation of Circuits

16、 .31 17 Barriers 32 18 Heating Elements .32 19 Electrical Insulation .32 20 Thermal Insulation 33 20.1 General .33 20.2 Synthetic foam .33 21 Overcurrent Protective Devices .34 22 Lampholders .35 23 Switches and Control Devices 35 24 Temperature-Limiting Controls 36 25 Temperature-Regulating Control

17、s .39 26 Terminals and Sensing Elements of Temperature-Regulating and Temperature-Limiting Controls .41 27 Materials in Contact with Water .41 27.1 General .41 MARCH 29, 2016 UL 1453 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 27.2 Dip

18、tubes 42 28 Spacings 42 29 Grounding .43 30 Motors .46 30.1 General .46 30.2 Motor overload protection .49 31 Low-voltage transformers General 52 REDUCTION OF RISK OF INJURY TO PERSONS 32 Reduction of Risk of Injury to Service Personnel 52 33 Enclosures and Guards 54 34 Switches and Controls .54 35

19、Surface Temperature 54 36 Pressure Vessels and Parts Subject to Pressure .54 37 Temperature and Pressure Relief Devices .54 PERFORMANCE 38 General 55 39 Test Installation for Alcove or Closet 55 40 Leakage Current Test .58 41 Grounding Continuity Test .62 42 Input Test 62 43 Temperature-Regulating a

20、nd Temperature-Limiting Control Operation Tests .62 43.1 Temperature-regulating controls 62 43.2 Temperature-limiting controls 63 44 Nonmetallic Dip Tube Tests 63 44.1 Deformation and weight loss .63 44.2 Resistance to crushing 64 44.3 Collapse 66 45 Temperature Tests 67 45.1 General .67 45.2 Contin

21、uous operation .69 45.3 Surface temperature 70 46 Hydrostatic Pressure Test .70 47 Enclosure Strength Test .70 48 Strain Relief Test .71 49 Push Back Relief Test .71 50 Knockout Test 71 51 Dielectric Voltage-Withstand Test .71 52 Heating Element Insulation Resistance Test .72 53 Electrical Disturban

22、ce Evaluation of Foam Thermal Insulation 73 MANUFACTURING AND PRODUCTION TESTS 54 Dielectric Voltage-Withstand Test .73 55 Grounding Continuity Test .75 RATINGS 56 Details .75 MARCH 29, 2016 UL 1453 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION F

23、ROM UL MARKINGS 57 General 76 58 Cautionary Markings 80 INSTRUCTIONS 59 Details .81 MARCH 29, 2016 UL 1453 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electric booster water heaters, ele

24、ctric commercial storage tank water heaters, and remote control assemblies for such heaters, rated 600 volts or less, to be employed in ordinary locations in accordance with the National Electrical Code, NFPA 70, and that meet at least one of the following conditions: a) Over 120 gallons (454 L) in

25、capacity; b) Rated over 12 kilowatts; or c) Equipped with one or more temperature-regulating controls that permit a water temperature of more than 85C (185F). 1.2 These heaters are intended for installation in accordance with model mechanical and plumbing codes. 1.3 An electric water heater not exce

26、eding 120 gallons (454 L) capacity, rated no more than 12 kilowatts, and equipped with a temperature-regulating thermostat having no marked dial setting more than 77C (171F) and provided with a stop to prevent adjustment to a higher setting, shall be judged in accordance with the requirements in the

27、 Standard for Household Electric Storage Tank Water Heaters, UL 174. 1.4 These requirements do not cover electric boilers, commercial cooking appliances, medical and dental equipment, or other electric heating equipment or appliances that are covered in or as part of individual requirements that are

28、 separate from this standard. Electrode type boilers are not covered by these requirements. 1.5 In the following text, a requirement that applies only to booster water heaters or to commercial storage-tank water heaters is so identied by a specic reference in that requirement to the equipment involv

29、ed. Absence of such a specic reference or use of the term water heater indicates that the requirement applies to all of the equipment covered in this standard unless the context indicates otherwise. MARCH 29, 2016 UL 1453 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI

30、ON WITHOUT PERMISSION FROM UL 2 Components 2.1 Except as indicated in this clause, a component of a product covered by this standard shall comply with the requirements for that component. See the individual sections of this standard for component requirements. 2.2 A component is not required to comp

31、ly with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the

32、intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those speci

33、c conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.2 Unless indicated otherwise, all voltage and current values mentioned in this standard are root mean square (rms). 4 Undated References

34、 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this standard the following denitions shall apply. 5.2 BOOSTER WATER HEATER A water heat

35、er furnishing hot water from initially heated water, which is usually 60C (140F), with the minimum output water temperature being 77C (171F). 5.3 ELECTRICAL CIRCUITS a) Line Voltage Circuit A circuit involving a potential of no more than 600 volts and having circuit characteristics in excess of thos

36、e of a low voltage circuit. b) Low Voltage Circuit A circuit involving a potential of no more than 30 volts rms (42.4 volts peak) supplied by a battery or by a standard Class 2 transformer or other transforming device, or by a combination of transformer and xed impedance having output characteristic

37、s in compliance with requirements established for a Class 2 transformer. A circuit obtained by connecting resistance in series with a line voltage supply circuit as a means of limiting the voltage and current is not considered to be a low voltage circuit. MARCH 29, 2016 UL 1453 7UL COPYRIGHTED MATER

38、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.4 ENCLOSURE The part of an electric water heater that surrounds insulated and uninsulated current-carrying live parts and that is intended to contain a re resulting from an electrical fault. 5.5 FRAME A structur

39、e of angle or channel or a folded rigid section of sheet metal that is rigidly attached to and has essentially the same outside dimensions as the enclosure surface and that has sufficient torsional rigidity to resist the bending moments which may be applied via the enclosure surface when it is deect

40、ed. 5.6 HEATING ELEMENT ACCESSORY An attachment to the water heater that will allow electrical rating modication. The heating element accessory consists of a heating element(s), a new rating label, and associated hardware to mount the element(s). 5.7 OPERATING CONTROL A control intended to start or

41、regulate the appliance during normal operation. An example would be a water temperature-regulating control. An operating control could provide Type 1 or Type 2 action. (See denitions 5.13 and 5.14.) 5.8 OUTER JACKET The part of the water heater that surrounds the storage tank and that is intended to

42、 provide mechanical protection for the tank and for thermal insulation when the insulation is provided. The outer jacket also serves as an enclosure of current-carrying parts and insulated conductors between heating elements in separate control or wiring compartments. 5.9 PROTECTIVE CONTROL A contro

43、l intended to prevent the risk of electric shock, re, or injury to persons during abnormal operation of the appliance. An example would be a water temperature limit control. A protective control always provides Type 2 action. (See denitions 5.13 and 5.14.) 5.10 QUALIFIED SERVICE PERSONNEL Persons ha

44、ving appropriate technical training and experience necessary to: a) Perform tasks in service access areas of the equipment; and b) Be aware of risks of injury to which they are exposed in performing a task, and of measures to minimize these risks to themselves or other persons. 5.11 SAFETY CONTROL A

45、 control that is relied upon to reduce the risk of re, electric shock, or injury to persons for example, an interlock. A safety control may include such devices as relays, switches, interlocks, and other auxiliary equipment used to form a safety control system. 5.12 TEMPERATURE-PRESSURE RELIEF VALVE

46、 An automatic resetting pressure relieving device actuated by water pressure or an integral thermal element that is in contact with and responsive to the heated water. 5.13 TYPE 1 ACTION Automatic action for which the manufacturing deviation and the drift of its operating value, operating time, or o

47、perating sequence have not been declared and tested to the Standard for Automatic Electrical Controls for Household and Similar Use, Part 1: General Requirements, UL 60730-1. MARCH 29, 2016 UL 1453 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FR

48、OM UL 5.14 TYPE 2 ACTION Automatic action for which the manufacturing deviation and the drift of its operating value, operating time, or operating sequence have been declared and tested to the Standard for Automatic Electrical Controls for Household and Similar Use, Part 1: General Requirements, UL

49、60730-1. CONSTRUCTION 6 Frame and Enclosure 6.1 General 6.1.1 A water heater shall be provided with an enclosure housing all parts that present a risk of re, electric shock, or injury to persons under any condition of use. 6.1.2 The frame, if provided enclosure, and outer jacket of a water heater shall have strength and rigidity to resist the abuses likely to be encountered during intended use. The degree of resistance inherent in the water heater shall preclude tota