1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 791 Residential IncineratorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
2、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Residential Incinerators, UL 791 Fifth Edition, Dated November 10, 2006 Summary of Topics This revision to UL 791 is being issued to remove the reference to NFPA No. 8221. NFPA No. 8221 is no longer an active NFPA code. Te
3、xt that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical 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 whic
4、h the changed requirement becomes effective. 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 Standa
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8、oduced while 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 followin
9、g the affected 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. NOVEMBER 7, 2014 UL 791 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRI
10、BUTION WITHOUT PERMISSION FROM UL NOVEMBER 7, 2014 UL 791 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 10, 2006 (Title Page Reprinted: November 7, 2014) 1 UL 791 Standard for Residential Incinerators First
11、 Edition June, 1956 Second Edition February, 1963 Third Edition May, 1973 Fourth Edition June, 1993 Fifth Edition November 10, 2006 This UL Standard for Safety consists of the Fifth Edition including revisions through November 7, 2014. 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 o
13、f 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.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 10
14、, 2006 RESIDENTIAL INCINERATORS - UL 791 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .5 4 Glossary .6 5 Installation and Operating Instructions
15、.8 CONSTRUCTION 6 Assembly 9 7 Enclosure .10 8 Internal Wiring .11 9 Wiring Methods 11 10 Field-Wiring Connections 15 11 Ash Compartment 16 12 Body 16 13 Capacity .16 14 Casing 16 15 Charging Door 16 16 Combustion Chamber .17 17 Combustion Regulation 17 18 Damper 18 19 Disposal of Combustion Product
16、s .18 20 Draft Hood .18 21 Flue Collar .18 22 Grates .18 23 Insulation, Thermal 18 24 Radiation Shields .19 ELECTRICAL COMPONENTS 25 General 19 26 Electrical Enclosures 19 27 Heating Elements .20 SPACINGS 28 General 20 GAS EQUIPMENT 29 Burners 21 30 Primary Air Control 21 31 Orices and Orice Fitting
17、s 22 32 Pilots 22 33 Automatic Pilot Devices .23 34 Pilot Filters .23 35 Gas Valves 23 36 Gas Supply Lines .24 NOVEMBER 10, 2006 RESIDENTIAL INCINERATORS - UL 791 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 37 Gas-Pressure Regulators 24
18、 PERFORMANCE 38 General 25 39 Test Installation Enclosure, Flue Pipe, and Chimney 27 40 Instrumentation .28 40.1 Draft measurement .28 40.2 Power measurement 28 40.3 Temperature measurement 28 41 Initial Test Conditions .33 42 Capacity Charge Maximum Air Supply Test 34 43 Capacity Charge Normal Air
19、Supply Test 35 44 Continuous Charge Test .35 45 Power Input Test .35 46 Dielectric Withstand Test 36 47 Insulation Resistance Test .36 48 Gas Burner Test 36 49 Strength Test .37 MANUFACTURING AND PRODUCTION TESTS 50 General 38 MARKING 51 General 38 NOVEMBER 10, 2006 RESIDENTIAL INCINERATORS - UL 791
20、 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements apply to direct-fed incinerators, including those of the gas and electric ignition types, designed primarily for use in one-and two-family dwelling
21、s for the burning of ordinary combustible waste materials and garbage incidental to domestic occupancy and having a rebox or charging compartment of not over 5 cubic feet capacity. 1.2 Incinerators of this type may also be employed in other occupancies including commercial establishments and institu
22、tions where the refuse is of a character for which the incinerator is designed and is not excessive in amount. They are not intended for use in spaces in which ammable vapor or gases may be present. 1.3 Incinerators covered by these requirements are the factory-made type not requiring eld constructi
23、on, and are designed for inside use. These requirements do not cover an incinerator that requires the use of a brick or masonry wall, etc., which forms a part of the building structure, or requires masonry work at the site to complete the incineration chamber. 1.4 Deleted November 7, 2014 1.5 A prod
24、uct that contains features, characteristics, components, materials, or systems new or different from those in use when the standard was developed, and that involves a risk of re, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requi
25、rements as determined necessary to maintain the level of safety for the user of the product as originally anticipated by the intent of this standard. 2 Components 2.1 A component of a domestic-type incinerator shall comply with the requirements for that component, except that such requirements may b
26、e modied if appropriate for the particular application. 3 Units of Measurement 3.1 If a value for measurement is followed by a value in other units in parentheses, the second value may be only approximate. The rst stated value is the requirement. NOVEMBER 7, 2014 RESIDENTIAL INCINERATORS - UL 791 5U
27、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Glossary 4.1 AIR SHUTTER An adjustable device for varying the size of the air inlet or inlets. 4.2 APPLIANCE FLUE The ue passages within the appliance. 4.3 ASH The solid residue remaining afte
28、r combustion or incineration has been completed. 4.4 ASH PIT DOOR A door below the grate level used for removing ash or other noncombustibles from the appliance. 4.5 BAFFLE An object placed in an appliance to direct or retard the ow of air or ue gases. 4.6 BASE The main supporting frame or structure
29、 of an assembly. 4.7 BODY The principal structure of the appliance including the supporting frame, and which gives strength and rigidity to the assembly. 4.8 BURNER A device for the nal conveyance of a fuel or a mixture of fuel and air to the combustion zone. 4.9 BUSHEL Dry bushel, 1.24 cubic feet.
30、4.10 CHIMNEY, FACTORY-BUILT Those chimneys of the factory-made type intended for use with gas, liquid, and solid-fuel red low-heat appliances and domestic-type incinerators. These chimneys may be used also where Type B gas vents are permitted. 4.11 CHIMNEY, MASONRY A vertical masonry or reinforced c
31、oncrete shaft containing one or more ues or vents. 4.12 COMBUSTIBLE CONSTRUCTION As pertaining to materials adjacent to or in contact with the incinerator and its ue pipe, shall mean materials made of or surfaced with wood, compressed paper, plant bers, or other material that will ignite and burn. S
32、uch material shall be considered as combustible even though ame-proofed, re-retardant treated, or plastered. Gypsum or other wallboards that are surfaced with combustible material are classied as combustible. 4.13 CASING An enclosure forming the outside of the appliance, no parts of which are likely
33、 to be subjected to intense heat. 4.14 COMBUSTION As used herein, the rapid oxidation of combustibles (fuel and waste material) accompanied by the production of heat, or heat and light. Complete combustion is possible only in the presence of an adequate supply of oxygen. 4.15 COMBUSTION CHAMBER The
34、portion of an incinerator within which incineration occurs. 4.16 CONTROL A device designed to regulate the fuel, air, or electrical supply to the controlled equipment. It may be automatic, semiautomatic, or manual. 4.17 DAMPER A valve or plate for regulating draft or ow of ue gases. A damper is gene
35、rally considered as being located on the downstream side of the combustion chamber, usually in a ue passage of the appliance or in the ue pipe. NOVEMBER 10, 2006 RESIDENTIAL INCINERATORS - UL 791 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
36、 UL 4.18 DRAFT REGULATOR A device which functions to maintain a desired draft in the appliance by automatically reducing the chimney draft to the desired value. 4.19 ELECTRICAL CIRCUITS a) HIGH-VOLTAGE CIRCUIT A circuit involving a potential of not more than 600 volts and having circuit characterist
37、ics in excess of those of a low-voltage circuit. b) LOW-VOLTAGE CIRCUIT A circuit involving a potential of not more than 30 volts and supplied by a primary battery or by a standard Class 2 transformer or other suitable transforming device, or by a suitable combination of transformer and xed impedanc
38、e having output characteristics in compliance with what is required for a Class 2 transformer. A circuit derived from a source of supply classied as a high-voltage circuit, by connecting resistance in series with the supply circuit as a means of limiting the voltage and current, is not considered to
39、 be a low-voltage circuit as described in item b of this paragraph. c) SAFETY CONTROL CIRCUIT A circuit involving one or more safety controls, in which failure due to grounding, opening, or shorting of any part of the circuit can cause unsafe operation of the controlled equipment or can introduce a
40、direct re or life hazard. 4.20 FLUE A conduit or passageway, vertical or nearly so, for conveying ue gases to the outer air. 4.21 FLUE COLLAR That portion of an appliance designed for attachment of the ue pipe. 4.22 FLUE GASES Combustion products and excess air. 4.23 FLUE PIPE The conduit connecting
41、 the incinerator with the chimney. 4.24 INCINERATOR An appliance used to reduce refuse material to ash and which is of the factory- made sold and installed as a package. 4.25 LINING Those interior surfaces of an incinerator which are exposed to waste material during use of the appliance. 4.26 MANIFO
42、LD The conduit of an appliance which supplies gas to the individual burners. 4.27 MIXER The combination of mixer head, mixer throat, and mixer tube for a gas burner. 4.28 ORIFICE The opening in a cap, spud, or other device whereby the ow of gas is limited and through which the gas is discharged to a
43、 burner. 4.29 ORIFICE CAP (HOOD) A movable tting having an orice which permits adjustment of the ow of gas by the changing of its position with respect to a xed needle or other device. 4.30 ORIFICE SPUD A removable plug or cap containing an orice and which permits adjustment of the ow of gas either
44、by substitution of a spud with a different sized orice or by the motion of a needle with respect to it. 4.31 PILOT A small ame which is utilized to ignite the fuel at the main burner or burners. 4.32 PILOT, AUTOMATIC Consists of an automatic pilot device and pilot burner securely assembled in xed fu
45、nctional relationship. NOVEMBER 10, 2006 RESIDENTIAL INCINERATORS - UL 791 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.33 PILOT DEVICE, AUTOMATIC A device employed with gas-burning equipment which will either automatically shut off th
46、e gas supply to the burner being served, or automatically actuate electrically or otherwise a gas-shutoff device when the pilot ame is extinguished. The pilot burner may or may not be constructed integrally with the device. 4.34 PORT Any opening in a burner head through which fuel or an air-fuel mix
47、ture is discharged for ignition. 4.35 PRIMARY AIR The air introduced into a burner and which mixes with the fuel before it reaches the ignition zone. 4.36 READILY ACCESSIBLE Capable of being reached easily and quickly for operation, adjustment, and inspection. 4.37 REGULATOR, GAS-PRESSURE A device f
48、or controlling and maintaining a uniform gas-supply pressure. 4.38 SECONDARY AIR The air externally supplied to the ame at or beyond the point of ignition. 4.39 SMOKE PIPE See 4.23, Flue Pipe. 4.40 VALVE CONTROL An automatically or manually operated device consisting essentially of a valve for contr
49、olling the fuel supply to a burner. a) METERING (REGULATING) VALVE A control valve for regulating burner input. b) SAFETY SHUTOFF VALVE An automatic control valve of the on and off type, without any bypass to the burner, that is actuated by a safety control or by an emergency device. 4.41 VALVE MANUAL MAIN SHUTOFF A manually operated valve for the purpose of completely turning on or shutting off
