1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 753 Alarm Accessories for Automatic Water-Supply Control Valves for Fire Protection ServiceUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
2、FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Alarm Accessories for Automatic Water-Supply Control Valves for Fire Protection Service, UL 753 Eighth Edition, Dated October 25, 2013 Summary of Topics This n
3、ew edition of UL 753 has been published to reect the rst time ANSI approval of the Standard. The requirements are substantially in accordance with Proposal(s) on this subject dated August 9, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or tr
4、ansmitted 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 merchantability or tness
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8、ept 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 Standard, an
9、d are preceded by a SUPERSEDED REQUIREMENTS notice. OCTOBER 25, 2013 UL 753 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 25, 2013 UL 753 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
10、 DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 25, 2013 1 UL 753 Standard for Alarm Accessories for Automatic Water-Supply Control Valves for Fire-Protection Service First Edition November, 1967 Second Edition July, 1971 Third Edition March, 1976 Fourth Edition October, 1982 Fifth Edition August,
11、1989 Sixth Edition July, 1995 Seventh Edition May, 2004 Eighth Edition October 25, 2013 This ANSI/UL Standard for Safety consists of the Eighth Edition. The most recent designation of ANSI/UL 753 as an American National Standard (ANSI) occurred on October 25, 2013. ANSI approval for a standard does
12、not include the Cover Page, Transmittal Pages, Title Page, or effective date information. 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
13、 (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 regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT
14、 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 753-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 25, 2013 UL 753 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMIS
15、SION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .6 4 Undated References 6 5 Glossary .6 CONSTRUCTION 6 Adjustment and Stops .6 7 Calibration Means .7 8 Tampering Protection 7 9 Materials .8 10 Assembly .8 11 Threaded Openings 8 12 Operating Mechanisms .9 13 Water
16、Motors 9 14 Gong and Gong Protection 9 15 Strainers .10 16 Enclosures .10 17 Corrosion Protection 12 18 Mounting 12 19 Supply Connections .13 20 Field Wiring Connections 14 21 Leads .14 22 Terminals 14 23 Wiring Space .15 24 Interconnection of Units .15 25 Internal Wiring 16 26 Switches .17 27 Mercu
17、ry-Tube Switches 17 28 Insulating Material 17 29 Current Carrying Parts 18 30 Grounding and Bonding .18 31 Spacings 18 32 Servicing Protection .20 PERFORMANCE 33 General 20 34 Water Operated Accessories Test 21 34.1 Response .21 34.2 Endurance 21 34.3 Intensity of alarm .21 35 Pressure Actuated Acce
18、ssory Test 23 35.1 Sensitivity .23 35.2 Strength of parts .23 36 Elastomeric Parts Test 25 37 Overload Test 25 OCTOBER 25, 2013 UL 753 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 38 Endurance Test 26 39 Dielectric Voltage-Withstand Test
19、 .26 40 Short Circuit Test .27 41 Strain-Relief Tests 27 41.1 Flexible cords 27 41.2 Field supply or internal leads 27 42 Push-Back Relief Test .28 43 Corrosion Tests 28 43.1 General .28 43.2 Hydrogen sulde .28 43.3 Sulfur dioxide-carbon dioxide 28 MANUFACTURING AND PRODUCTION TESTS 44 General 29 MA
20、RKINGS 45 General 29 46 Cautionary And Warning .30 INSTRUCTIONS 47 General 30 APPENDIX A Standards for ComponentsA1 OCTOBER 25, 2013 UL 753 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover al
21、arm accessories for automatic water-supply control valves for use in automatic sprinkler equipment for re protection service. Accessories may include water motors and gongs, pressure-operated switches, and other electrical and nonelectrical attachments, components, or units commonly used with alarm,
22、 dry-pipe and pre-action valves. 1.2 Requirements for the installation and use of alarm accessories with automatic water-supply control valves are included in the Standard for Installation of Sprinkler Systems, NFPA 13. 1.3 The electrical alarm accessories for automatic water-supply control valves a
23、re intended for re-protective signaling use in ordinary locations in accordance with the National Electrical Code, ANSI/NFPA 70. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a
24、list of standards covering components generally used in the products covered by this standard. 2.2 A component is not required to comply 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, o
25、r b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for
26、use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. OCTOBER 25, 2013 UL 753 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measureme
27、nt 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 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
28、of that code or standard. 5 Glossary 5.1 For the purpose of this standard, the following denitions apply. 5.2 HIGH-VOLTAGE ELECTRIC CIRCUIT A circuit involving a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage (or Class 2) circuit (or power
29、 limited circuit). 5.3 LOW-VOLTAGE ELECTRIC CIRCUIT A circuit involving a potential of not more than 30 volts rms alternating current (ac) 42.4 volts peak or direct current (dc) and supplied by: a) A Class 2 transformer; or by a battery, by a battery and xed impedance, or by a transformer and xed im
30、pedance, each of which, as a unit, complies with all the performance requirements for a Class 2 transformer; or b) Is limited to a maximum of 100 volt-amperes (va). A circuit derived from a source of supply classied as high-voltage circuit, using resistance in series with the supply circuit as a mea
31、ns of limiting the voltage and current, is not considered to be a low-voltage or an isolated limited secondary circuit. 5.4 SET POINT A predetermined value to which a control or interlock is adjusted and at which it performs its intended function. CONSTRUCTION 6 Adjustment and Stops 6.1 The set poin
32、t of a pressure actuated control shall be indicated on the control in a recognizable and legible manner. 6.2 If a control is nonadjustable following factory calibration, it may be marked with a single set point. 6.3 If a control is adjustable in the eld, the set points over the range of allowable el
33、d adjustment shall be indicated on the control. OCTOBER 25, 2013 UL 753 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.4 An adjustable stop employed for limiting a set point shall not be used for other adjustments. It shall be rmly secur
34、ed by a means provided solely for that purpose and in a manner so that the maximum intended setting cannot be increased except by the use of tools or by deliberate bending or removal of some part. A nut, screw, or the like, used for this purpose shall be provided with an integral lock washer, or the
35、 equivalent. A part used for support of the adjustment means shall have strength sufficient to resist unintentional bending. 6.5 If it is evident that a set point will be altered by resetting or removing the stop, or if directions are included on the control for altering the set point, a statement s
36、hall appear on the dial, scale, or stop, or directly adjacent thereto, or on the outside (not inside) of the cover. This statement shall be to the effect that the setting is a safety stop and is not to be altered to permit a higher or less safe operating point, for example, SAFETY STOP DO NOT ALTER.
37、 7 Calibration Means 7.1 Means provided for factory calibration of pressure actuated controls shall be factory secured against disturbances. The means for calibration, if accessible or apparent, shall be modied, guarded, or sealed to effectively prevent manipulation by hand or by commonly available
38、tools subsequent to the factory calibration as specied in 8.2. 7.2 Sealing means used shall not permit evidence of tampering to be destroyed by replacement with commonly available material. 7.3 A calibration means considered to be not accessible or apparent is one not exposed to manipulation by comm
39、only available tools, as specied in 8.2, or one not readily displaced. The complete concealment of conventional tool engaging means in a screw, such as a slot or recessed head, by the use of solder or brazing material is acceptable for preventing manipulation if the calibration means cannot be chang
40、ed by gripping with commonly available tools, and if engagement or manipulation is prevented at all other locations. 8 Tampering Protection 8.1 A door, cover, panel, or mounting means of a pressure actuated device, that permits access to internal components that may be subject to tampering, shall be
41、 provided with means for supervision. 8.2 The cover of a pressure actuated device shall be provided with a tamper switch, unless the cover cannot be removed by using commonly available tools, such as hex-head wrenches, slotted or cross-recessed screwdrivers, or pliers. OCTOBER 25, 2013 UL 753 7UL CO
42、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Materials 9.1 A part requiring freedom of movement essential to the operation of the device or for metering water ow shall be made of bronze or other material having equivalent durability and resi
43、stance to corrosion. 9.2 Body castings and covers shall be made of cast iron or other material having equivalent strength and corrosion resistance. 10 Assembly 10.1 An alarm accessory assembly shall include all of the components necessary for its intended function and installation. The components sh
44、all be planned for assembly as a unit. 10.2 An alarm accessory shall be constructed so that it can be installed and connected without damage to the accessory, using tools normally employed by the trade. 10.3 Two or more subassemblies intended to be assembled in the eld as a unit shall be capable of
45、being joined together without misalignment and without requiring any of the subassemblies to be drilled, welded, or otherwise altered except for a part required to be cut to length or threaded. 10.4 For the purpose of these requirements, if two or more subassemblies are designed to be used together
46、as one unit, the entire assembly shall be considered and tested as one unit. 10.5 The assembly shall be capable of being dismantled, without removing the device from supporting structures or piping or disconnecting the eld wiring means to permit inspection, adjustment, or repairs. Any means for adju
47、stment that could adversely affect the operation of the device shall be enclosed or shielded to discourage tampering. 10.6 A water motor and gong assembly shall be constructed to prevent loosening of the gong from its support as a result of operation of the assembly or setting of the supporting stru
48、cture. 11 Threaded Openings 11.1 An opening threaded for pipe connection shall be threaded in accordance with the Standard for General Purpose Pipe Threads, ANSI/ASME B1.20.1. An assembly for attachment to pipe by threaded connection shall have a substantial section to serve as a wrench grip. 11.2 A
49、 ferrule, bushing, or other functional part of a device having a threaded connection for attachment to pipe shall not become loosened or dislodged as the result of the turning effect of assembling or dismantling pipe. OCTOBER 25, 2013 UL 753 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12 Operating Mechanisms 12.1 Shafts or bearings and materials in contact with bearings for movable parts shall be of corrosion resistant materials
