1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 462 Heat Reclaimers for Gas-, Oil-, or Solid Fuel-Fired AppliancesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT
2、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Heat Reclaimers for Gas-, Oil-, or Solid Fuel-Fired Appliances, UL 462 Third Edition, Dated December 13, 2010 Summary of Topics This revision to UL 462 is being issued to remove the re
3、ference to the withdrawal date of UL 873 and to address universal upkeep of UL Standards for Safety. These revisions are considered to be non-substantive and not subject to ULs STP process. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vert
4、ical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. All rights reserved. No part of this publication may be reprodu
5、ced, 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, including but not limited to, the implie
6、d 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 inability to use this Standard,
7、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 Standards for Safety agree to de
8、fend, 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 computer system. The requirements
9、 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 affected item. The prior text for requirements that have been revised and that have a future effective
10、 date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. SEPTEMBER 26, 2013 UL 462 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 26, 2013 UL 462 tr2 No Text on This PageUL COPYRIGHTED MATERIA
11、L NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2010 (Title Page Reprinted: September 26, 2013) 1 UL 462 Standard for Heat Reclaimers for Gas-, Oil-, or Solid Fuel-Fired Appliances First Edition September, 1991 Second Edition September, 1993 Third Ed
12、ition December 13, 2010 This UL Standard for Safety consists of the Third Edition including revisions through September 26, 2013. 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 Co
13、llaborative 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 regarding those Standards shall remain the sole
14、 and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 13, 2010 UL 462 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS
15、TRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .6 4 Undated References 6 5 Glossary .6 CONSTRUCTION 6 Components 7 7 Assembly 7 8 Materials .8 9 Electrical Enclosures 9 9.1 General .9 9.2 Doors and covers .11 9.3 Openings .12 10 Supply Con
16、nections .19 10.1 General .19 10.2 Leads .19 10.3 Terminals .20 10.4 Wiring space .21 10.5 Power supply cords .21 11 Current-Carrying Parts 22 12 Switches and Controllers 22 13 Mounting of Electrical Components .22 14 Internal Wiring 23 14.1 General .23 14.2 Wiring methods 23 15 Separation of Circui
17、ts .24 16 Bonding for Grounding 25 17 Motors and Motor Overcurrent (Overload) Protection 27 18 Capacitors .30 19 Insulating Material 30 20 Electrical Spacings 30 20.1 General .30 20.2 High-voltage circuits 31 20.3 Low-voltage circuits .32 PERFORMANCE 21 General 33 22 Mounting Positions 33 23 Test Vo
18、ltages 34 24 Input Test 34 25 Heating Test .34 25.1 Test installation 34 25.2 Temperature measurements on other than electrical parts .38 25.3 Temperature measurement on electrical components .41 25.4 Test method I (with air or water circulation) 42 DECEMBER 13, 2010 UL 462 3UL COPYRIGHTED MATERIAL
19、NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 25.5 Test method II (without air or water circulation) 45 26 Abnormal Heating Test 46 26.2 Method I (with air or water circulation) 46 26.3 Method II (without air or water circulation) .46 27 Operation Test .46 27.1 M
20、ethod I (minimum ue gas temperature) .46 27.2 Method II (maximum water temperature) 47 28 Draft Loss Test .48 29 Hydrostatic Strength Test 48 30 Dielectric Voltage-Withstand Test .49 31 Leakage Current Test Cord-Connected Products .49 32 Stalled Blower Motor Test .52 MANUFACTURING AND PRODUCTION TES
21、TS 33 Production-Line Dielectric Voltage-Withstand Test 52 MARKING 34 General 53 INSTRUCTIONS 35 Installation Instructions 55 APPENDIX A Standards for ComponentsA1 DECEMBER 13, 2010 UL 462 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INT
22、RODUCTION 1 Scope 1.1 These requirements cover heat reclaimers which are intended to recover a portion of heat from the ue gases of gas-, oil-, or solid fuel-red appliances for the purpose of heating space or water. They are for installation on the vent or chimney connectors of the appliances which
23、are for attachment to a Type B or Type L vent or a metal or masonary chimney. The heat reclaimers are covered for the maximum ue gas temperature marked on the heat reclaimer, which does not exceed 1000F (538C). 1.2 The heat reclaimers are intended for installation by a qualied agency in accordance w
24、ith the manufacturers instructions and the Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances, NFPA 211 or with the National Fuel Gas Code, NFPA 54/ANSI Z223.1. 1.3 These heat reclaimers intended for connection to an electrical supply are to be rated 240 volts or less, and a
25、re for installation in accordance with the requirements for ordinary locations in the National Electrical Code, NFPA 70. 1.4 Heat reclaimers which include plumbing connections are to be installed in accordance with the applicable plumbing codes. 2 Components 2.1 Except as indicated in 2.2, a compone
26、nt of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.2 A component need not comply with a specic requirement that: a) Involves a feature or
27、 characteristic not needed 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 recognized rating established for the intended conditions of use. 2.4 Specic components
28、are recognized as being 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 specic conditions for which they hav
29、e been recognized. DECEMBER 13, 2010 UL 462 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information.
30、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 of that code or standard. 5 Glossary 5.1 For the purpose of this standard, the following denitions apply. 5.2 CHIMNEY CONNECTOR
31、The pipe which connects a fuel-burning appliance to a chimney. 5.3 COMBUSTIBLE MATERIAL, COMBUSTIBLE PRODUCTS, NONCOMBUSTIBLE MATERIALS These terms, as used in this standard, are dened in the Standard Glossary of Terms Relating to Chimneys, Vents, and Heat-Producing Appliances, NFPA 97M. 5.4 DRAFT D
32、IVERTER (Also referred to as a Draft Hood.) A device built into a gas burning appliance or made a part of the vent connector from an appliance, which is intended to: a) Provide for the ready escape of the ue gases from the appliance in the event of no draft, back draft, or stoppage beyond the draft
33、diverter, b) Prevent back draft from entering the heating appliance, and c) Neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance. 5.5 DRAFT REGULATOR, BAROMETRIC A device which functions to maintain a desired draft in the oil-red appliance by automatic
34、ally reducing the chimney draft to the desired value. 5.6 ELECTRICAL CIRCUITS: a) High-Voltage Circuit For the purpose of this standard, a circuit involving a potential of not more than 240 volts and having circuit characteristics in excess of those of a low-voltage or an isolated limited secondary
35、circuit. b) Low-Voltage Circuit A circuit involving a potential of not more than 30 volts alternating current (ac) 42.4 volts peak or direct current (dc) and supplied by a primary battery or by a standard Class 2 transformer, or by a combination of transformer and xed impedance which, as a unit, com
36、plies with all the performance requirements for a Class 2 transformer. (A circuit derived from a source of supply classied as a high-voltage circuit, using resistance in series with the supply circuit as a means of limiting the voltage and current, is not considered to be a low-voltage nor an isolat
37、ed limited secondary circuit.) c) Safety-Control Circuit A circuit involving one or more safety controls. DECEMBER 13, 2010 UL 462 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.7 SOLID FUEL-FIRED APPLIANCE A heating appliance which has
38、a freestanding re chamber assembly of the circulating or direct radiation type. Solid fuel units are for attachment to a residential type chimney available for use with low-heat appliances and may be used to burn solid fuels commonly used in replaces. These units may be thermostatically controlled.
39、5.8 VENT CONNECTOR The pipe which connects a gas-burning appliance to a vent. CONSTRUCTION 6 Components 6.1 See 2.1 2.4 for requirements covering the construction and use of components on the heat reclaimers covered by this standard. 7 Assembly 7.1 All components necessary for the intended function
40、of the heat reclaimer shall be included with the product. 7.2 A joint in the metal surface of a heat reclaimer which forms a passageway for the ue gases shall be tight, as attained by being welded, lock-seamed, riveted, bolted, or equivalent means. A joint shall not depend primarily on cement for ti
41、ghtness. 7.3 A heat reclaimer shall be provided with means other than vent or chimney connection for support of the assembly when it is installed. 7.4 A heat reclaimer for oil- and solid fuel-red appliances shall include means for cleaning the passageways for ue gases without having to disassemble t
42、he heat reclaimer. 7.5 With respect to 7.4, an independently removable access panel that can be removed and replaced by use of conventional tools without moving the heat reclaimer from its installed position is not considered disassembly. When closed, this access panel shall form a tight seal to pre
43、vent leakage of ue gases. 7.6 A heat reclaimer shall be constructed so there is no reduction in the total free venting area as compared to the cross-sectional area of a chimney or vent connector pipe on which the heat reclaimer is to be installed. Also, it shall not signicantly impede the ow of vent
44、 gases. This is to be determined by tests in accordance with Draft Loss Test, Section 28. 7.7 Unless a heat reclaimer that is intended to heat water is limited for installation on a water heating appliance and connected to the appliance such that the temperature of the water is regulated and limited
45、 by the controls on the appliance, it shall be provided with means to limit the temperature of the water owing through the heat reclaimer to 210F (99C). See 27.2.1 27.2.2. 7.8 If a heat reclaimer is provided with a temperature-operated control for operation of the blower or a pump motor and the cont
46、rol is required to achieve conformance with 6.1.7, the temperature operated control shall comply with the Standard for Limit Controls, UL 353. DECEMBER 13, 2010 UL 462 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.9 The heat exchanger o
47、f a heat reclaimer intended to heat water shall be of sufficient strength to withstand the Hydrostatic Strength Test as described in Section 29. 8 Materials 8.1 The outer casing or jacket of a heat reclaimer shall be made of steel or equivalent material, reinforced or formed if necessary, so that it
48、 is not likely to be damaged through handling in shipment, installation, and use. Sheet metal casings shall be made of steel having a minimum thickness of 0.020 inch (0.51 mm) if uncoated, or 0.023 inch (0.58 mm) if galvanized, or of nonferrous sheet metal having an average thickness of not less tha
49、n 0.029 inch (0.74 mm), and all surfaces shall be protected against corrosion. The nish on the outer casing or jacket of the heat reclaimer shall not be damaged by heat during any of the tests. 8.2 A ueway of a heat reclaimer shall be constructed of cast iron or galvanized sheet steel having thickness of at least 0.032 inch (0.8 mm) for a heat reclaimer up to 16 inches (406 mm) in diameter, whereby the ue collar size determines the size of the heat reclaimer. For a heat rec
