1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 555C Ceiling DampersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
2、OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Ceiling Dampers, UL 555C Fourth Edition, Dated December 16, 2014 Summary of Topics The Fourth Edition of the Standard for Safety for Ceiling Dampers, UL 555C, has been issued to reect the reaffirmation of the ANSI approval. No cha
3、nges in requirements have been made. 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 otherwise without prior permission of UL. UL provides this Standard as is
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7、hile purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, 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 af
8、fected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. DECEMBER 16, 2014 UL 555C tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
9、 WITHOUT PERMISSION FROM UL DECEMBER 16, 2014 UL 555C tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL December 16, 2014 1 UL 555C Standard for Ceiling Dampers Prior to the rst edition, the requirements for the product
10、s covered by this standard were included in the Third Edition of UL 555 titled Fire Dampers and Ceiling Dampers. First Edition December, 1992 Second Edition December, 1996 Third Edition October, 2006 Fourth Edition December 16, 2014 This ANSI/UL Standard for Safety consists of the Fourth Edition. Th
11、e most recent designation of ANSI/UL 555C as an American National Standard (ANSI) occurred on December 16, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard
12、 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 a Standard should be altered in any way. All
13、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. ANSI/UL 555C-2010 (R2014)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER
14、MISSION FROM UL DECEMBER 16, 2014 CEILING DAMPERS - UL 555C 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 5 2.1 Components .5 2.2 Units of measurement .5 2.3 Undated referenc
15、es .5 CONSTRUCTION 3 Components 5 4 Corrosion Protection .5 PERFORMANCE 5 General 6 6 Fire Endurance Test .7 6.1 Test assembly .7 6.2 Conditioning of test specimen 9 6.3 Time-temperature curve .9 6.4 Furnace pressure .12 6.5 Concealed space temperatures .13 6.6 Conduct of re test 13 6.7 Conditions o
16、f acceptance .14 7 Closing Reliability Test .14 8 Salt-Spray Exposure Test .14 9 Spring Closing Force Test 15 10 Dynamic Closure Test .15 10.1 General .15 10.2 Method .16 11 Reports of Results 17 MANUFACTURERS INSTRUCTIONS 12 Installation Instructions 18 MARKING 13 General 18 DECEMBER 16, 2014 CEILI
17、NG DAMPERS - UL 555C 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements and methods of tests apply to ceiling dampers and ceiling air diffusers intended for installation in hourly rated re resistive
18、oor-ceiling and roof-ceiling assemblies. Fire resistive assemblies are investigated in accordance with the Standard for Fire Tests of Building Construction and Materials, UL 263. 1.2 Ceiling dampers are intended for use in sheet metal air duct outlets which penetrate the ceilings of hourly-rated re
19、resistive assemblies. Ceiling air diffusers are intended for use with Class 0 and Class 1 air duct connectors, or for ductless installation in the ceilings of hourly rated re resistive assemblies. Ceiling dampers and ceiling air diffusers are designed for use as alternatives to previously tested hin
20、ged-door sheet metal type dampers installed at the bottom of sheet metal air ducts over each duct outlet. Ceiling dampers and ceiling air diffusers intended for installation in other types of re resistive assemblies, such as assemblies without penetrations, are investigated in accordance with the St
21、andard for Fire Tests of Building Construction and Materials, UL 263, in place of the Fire Endurance Test, Section 6, described in this standard. 1.3 The investigation of ceiling dampers and ceiling air diffusers for use in oor/ceiling assemblies previously rated with a hinged-door sheet metal dampe
22、r involves a comparison of the re resistance performance of the ceiling damper or ceiling air diffuser with that of a hinged-door sheet metal damper. This is done to conrm that the substitution of the ceiling damper or ceiling air diffuser does not reduce the hourly re endurance rating of an assembl
23、y previously rated with the hinged-door type damper. Ceiling dampers and ceiling air diffusers for use in oor/ceiling assemblies not previously rated with a hinged-door sheet metal damper shall be tested as a component of the proposed oor/ceiling assembly in accordance with the Standard for Fire Tes
24、ts of Building Construction and Materials, UL 263. Ceiling dampers and ceiling air diffusers are not assigned hourly ratings, but rather are assembly components designated for use in specic hourly rated re resistive assemblies incorporating air duct outlets penetrating protective ceilings. 1.4 The r
25、e performance measured by ANSI/UL 263 is based upon air movement being stopped at the start of a re. Ceiling dampers and ceiling air diffusers intended for use in HVAC systems where the airow is operational at the time of a re, such as in a smoke control system, or from other situations in which the
26、 fan system is operational at the time of a re are investigated for dynamic closure. Ceiling dampers and ceiling air diffusers intended for use where the air movement is effectively stopped at the start of a re are not required to be investigated for dynamic closure. 1.5 Tests conducted in accordanc
27、e with the test methods described herein are intended to develop data to enable regulatory authorities to determine the acceptability of ceiling dampers and ceiling air diffusers for use in oor-ceiling and roof-ceiling assemblies having hourly re endurance ratings of the specied or shorter duration.
28、 DECEMBER 16, 2014 CEILING DAMPERS - UL 555C 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components 2.1.1 A component of a product covered by these requirements shall comply with the requirements for that component and sha
29、ll be used in accordance with its recognized rating established for the intended conditions. 2.1.2 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
30、 exceeding specied limits, and shall be used only under those specic conditions. 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.3 Undated references 2.3.1 Any undated reference to a code or sta
31、ndard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 3 Components 3.1 The load on a heat responsive link used in a ceiling damper or ceiling air diffuser shall be within the design load limits of the heat
32、responsive link. 3.2 Component springs used in a ceiling damper or ceiling air diffuser shall be of a material having spring properties equivalent to stainless steel conforming to the Standard Specication for Stainless Steel Spring Wire, ASTM A313. 4 Corrosion Protection 4.1 A ferrous metal part use
33、d in the ceiling damper or ceiling air diffuser shall be one of the 300 Series of stainless steel or shall have one of the following corrosion-protection systems: a) A hot-dipped mill galvanized coating complying with the coating Designation G60 or A60 in the Weight (Mass) of Coating requirements ta
34、ble in the Standard Specication for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process, ASTM A653, with not less than 40% of the zinc on any side, based on the minimum single spot test requirement in this ASTM Designation. The weight of the zinc coa
35、ting is to be established in accordance with the Standard Test Method for Weight (Mass) of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings, ASTM A90. An A60 (alloyed) coating shall also comply with the requirements of 4.4. b) A zinc coating, other than that provided on hot-dipped
36、 mill galvanized sheet steel, uniformly applied to an average thickness of not less than 0.41 mils (10.41 microns) on each surface with a minimum thickness of 0.34 mils (8.64 microns). The thickness of the coating is to be established in accordance with the test method in the Standard Guide for Meas
37、urement of Electrodeposited Metallic Coating Thicknesses by the Dropping Test, ASTM B555. An annealed coating shall also comply with the requirements of 4.4. DECEMBER 16, 2014 CEILING DAMPERS - UL 555C 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
38、N FROM UL c) A cadmium coating not less than 0.5 mils (12.7 microns) thick on both surfaces. The thickness of coating is to be established in accordance with the test method in the Standard Guide for Measurement of Electrodeposited Metallic Coating Thicknesses by the Dropping Test, ASTM B555. d) Two
39、 coats of an organic nish of the epoxy or alkyd-resin type or other outdoor paint on each surface. The acceptability of the paint is to be determined by its composition or by corrosion tests, as specied in the Standard for Organic Coatings for Steel Enclosures for Outdoor Use Electrical Equipment, U
40、L 1332. 4.2 Coated or uncoated metals used in the assembly of ceiling dampers or ceiling air diffusers shall be galvanically compatible. 4.3 Component springs and bearings used in the assembly of ceiling dampers or ceiling air diffusers shall be of material having resistance to atmospheric corrosion
41、 equivalent to brass or bronze. 4.4 A hot-dipped mill galvanized A60 (alloyed) coating or an annealed zinc coating that is bent or similarly formed after annealing and that is not otherwise required to be painted shall be painted in the bent or formed area as specied in 4.1(d) when the bending or fo
42、rming process damages the zinc coating as described in 4.5. 4.5 When aking or cracking of the zinc coating at the outside radius of the bent or formed section is visible at 25 power magnication, the zinc coating is to be considered damaged. Simple sheared or cut edges and punched holes are not to be
43、 dened as formed. Extruded edges and rolled edges and holes shall comply with 4.4. PERFORMANCE 5 General 5.1 Representative samples of each size, style, and arrangement of ceiling dampers or ceiling air diffusers shall be subjected to the tests specied in Table 5.1. The representative sample sizes s
44、hall be determined on the basis of maximum ceiling damper or ceiling air diffuser size and most critical closing force condition. DECEMBER 16, 2014 CEILING DAMPERS - UL 555C 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 5.1 Tests fo
45、r ceiling dampers and ceiling air diffusers Test Sections Approved for: Static Systems Dynamic Systems Gravity-operated Spring-operated Gravity-operated Spring-operated 1. Fire Endurance Test a 6XXXX 2. Closing Reliability 7XXXX 3. Salt-Spray Exposure 8XXXX 4. Spring Closing Force 9XX 5. Dynamic Clo
46、sure 10 X X X Test applicable Test not applicable a The Fire Endurance Test described in this standard applies to ceiling dampers and ceiling air diffusers being evaluated for use in oor/ceiling assemblies previously tested with a hinged door sheet-metal damper. Ceiling dampers and ceiling air diffu
47、sers intended for use in oor/ceiling assemblies not previously tested with a hinged door sheet-metal damper shall be evaluated to the requirements of the Standard for Fire Tests of Building Construction and Materials, UL 263. 6 Fire Endurance Test 6.1 Test assembly 6.1.1 The ceiling damper or ceilin
48、g air diffuser shall be installed in a ceiling of a type previously tested in a rated re resistive oor-ceiling or roof-ceiling assembly. Each test assembly shall include a reference hinged-door type damper installed in a oor-ceiling test construction identical to that used with the ceiling damper or
49、 ceiling air diffuser installation. The ceiling compartments containing the reference hinged-door damper and the ceiling damper or ceiling air diffuser shall be separated by means of an insulated wall or barrier to prevent heat transfer from one ceiling compartment to the other during the re test. 6.1.2 The duct outlet provided with the reference hinged-door damper is to be representative of the smallest duct outlet size for which comparative performance data is desired. The compar
