1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 296A Waste Oil-Burning Air-Heating AppliancesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED
2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Waste Oil-Burning Air-Heating Appliances, UL 296A Second Edition, Dated October 31, 1995 Summary of Topics These revisions to ANSI/UL 296A are being issued to incorporate changes in boiler assembly require
3、ments. Editorial revisions are also being issued 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
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5、th Proposal(s) on this subject dated June 7, 2013. In the revisions dated March 16, 2010, pages 45 and 46 have been intentionally deleted from the Standard due to the relocation of text. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted
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11、eded by a SUPERSEDED REQUIREMENTS notice. AUGUST 1, 2013 UL 296A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 1, 2013 UL 296A tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
12、N WITHOUT PERMISSION FROM UL OCTOBER 31, 1995 (Title Page Reprinted: August 1, 2013) 1 UL 296A Standard for Waste Oil-Burning Air-Heating Appliances Previous numbered and unnumbered editions of standards covering heating appliances have been published since 1987. First Edition November, 1990 Second
13、Edition October 31, 1995 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through August 1, 2013. The most recent designation of ANSI/UL 296A as an American National Standard (ANSI) occurred on August 1, 2013. ANSI approval for a standard does not include the Cover
14、 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 (CSDS) at http:/. UL
15、s 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 2013 UNDERWRITERS LA
16、BORATORIES INC. UL/ANSI 296A-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 1, 2013 WASTE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR
17、IBUTION WITHOUT PERMISSION FROM UL CONTENTS PART I ALL WASTE OIL-BURNING AIR-HEATING APPLIANCES INTRODUCTION 1 Scope .7 2 General 7 3 Glossary .8 4 Components 12 CONSTRUCTION 5 Protection of Users and Service Personnel 12 6 Enclosures 16 6.1 General 16 6.2 Doors and covers .23 6.3 Field wiring syste
18、m connections .24 7 Field Wiring .25 7.1 General 25 7.2 Leads and terminals .27 8 Internal Wiring .29 8.1 General 29 8.2 Methods 29 8.3 Short circuit protection .33 9 Separation of Circuits 33 10 Grounding and Bonding .34 ELECTRICAL COMPONENTS 11 General 38 12 Mounting of Electrical Components .38 1
19、3 Motors and Motor Overload Protection 39 14 Overcurrent Protection of High-Voltage Control-Circuit Conductors 42A 14.1 General 42A 14.2 Direct-connected high-voltage control circuit 42A 14.3 Tapped high-voltage control circuits .42A 14.4 Overcurrent-protective devices 42B 15 Overcurrent Protection
20、of Transformers 43 15.1 High-voltage transformers .43 15.2 Low-voltage transformers 46A 15.3 Overcurrent protective devices 46A 16 Switches and Controllers 47 17 Capacitors .48 18 Electrical Insulating Materials .48 SPACINGS 19 High-Voltage Circuits 48 20 Low-Voltage Circuits 50 AUGUST 1, 2013 WASTE
21、 OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 21 General 50 22 Test Fuels .50 23 Instrumentation .52 23.1 Draft 52 23.2 Fuel input .52 23.3 Power measurement 52 23.4 Speed measurem
22、ent .52 23.5 Static pressure .52 23.6 Temperature measurement 54 24 Test Voltage .56 25 Power Input Test .57 26 Temperature Test .57 27 Stalled Fan Motor Test 62 28 Short-Circuit Test .62 29 Overload Test, High-Voltage Transformers .65 30 Burnout Test, High-Voltage Transformers 65 31 Dielectric Volt
23、age-Withstand Test Appliance 66 MANUFACTURING AND PRODUCTION TESTS 32 General 67 33 Production Line Dielectric Voltage-Withstand Test 68 MARKINGS 34 Nameplate .68 35 Supplementary .71 INSTRUCTIONS 36 General 72 PART II BURNERS CONSTRUCTION 37 General 73 38 Materials .74 39 Assembly 74 40 Accessibili
24、ty for Servicing 75 41 Fan Housings and Air Tubes .76 42 Combustion Air Controls .76 43 Fuel Strainers 77 44 Fittings, Piping, and Tubing 80 45 Valves .82A 46 Gauges 83 47 Ignition Systems 83 48 Electric High-Tension Ignition 84 48.1 Assembly .84 48.2 Electrode and bus bars .84 MAY 14, 2004 WASTE OI
25、L-BURNING AIR-HEATING APPLIANCES - UL 296A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 48.3 Insulators .85 48.4 Leads .85 48.5 Transformers 86 49 Gas Pilots .86 50 Control Applications .86 51 Primary Safety Controls .87 52 Oil Atomizati
26、on Control 88 53 Interlocks 88 54 Oil Heating Equipment 89 55 Air Atomizing Equipment .89 56 Combination Gas-Oil Burners 89 PERFORMANCE 57 General 89 58 Combustion Tests 90 58.1 Mechanical-atomizing burners general 90 58.2 Extended operation .90 59 Combustion Air Failure Test 91 60 Interruption of A
27、tomization Test .92 61 Undervoltage Operation Test .92 62 Power Interruption Test 93 63 Continuous Operation Temperature Test 94 64 Ignition Tests, Multiple Igniters .94 65 Ignition Tests, Electric High-Tension 94 65.1 Reduced voltage cold oil 94 65.2 Combustion detectors .95 66 Ignition Tests, Gas
28、Pilot .95 66.1 Reduced voltage .95 66.2 Pilot supervision 96 66.3 Flame failure response 96 66.4 Stability .97 67 Ignition Test, Gas-Electric System 97 68 Ignition Tests, Gas-Electric High-Tension System .97 68.1 Reduced voltage cold oil 97 68.2 Dielectric voltage-withstand burner 98 68.3 Dielectric
29、 voltage-withstand electrode insulators 98 69 Ignition Test, Multiple-Atomizer Burner 98 70 Abnormal Operation Test Oil Heating 98A PART III - BOILERS, FURNACES, AND HEATERS CONSTRUCTION 71 Assembly .98B 72 Accessibility for Servicing .101 73 Disposal of Combustion Products 102 74 Base .102 75 Casin
30、g .104 76 Radiation Shields or Liners .105 77 Materials in Air Handling Compartments 105 78 Air Filters .107 AUGUST 1, 2013 WASTE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 4AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 79 Combustion Ch
31、amber 107 80 Radiators .108 81 Heating Surface Joints .108 82 Baffles 108A 83 Flue Collars .108A 84 Dampers and Draft Regulators .108A 85 Controls 109 85.1 Application .109 85.2 Limit control 109 85.3 Fan control .110 PERFORMANCE CENTRAL FURNACES 86 General 110 87 Test Installation for Standard Clea
32、rances .112 87.1 Downow and upow furnaces enclosure 112 87.2 Chimney connector 113 87.3 Air outlet and inlet forced air furnace .115 87.4 Horizontal furnace enclosure .118 87.5 Chimney connector 118A 87.6 Air outlet and inlet .119 88 Initial Test Conditions 121 89 Combustion Test Burner and Furnace
33、122 90 Operation Tests .122 91 Limit Control Cutout Test .123 92 Continuity of Operation Test 123 93 Airow Test Downow and Horizontal Furnaces .124 94 Temperature Tests General .125 95 Continuous Operation Test .125 96 Restricted Inlet Test 126 97 Fan Failure Test .126A 98 Blocked Outlet Test .126A
34、PERFORMANCE UNIT HEATERS 99 General 127 100 Test Installation 128 100.1 Floor-mounted heaters 128 100.2 Suspended type heaters 132 101 Initial Test Conditions .134 102 Combustion Test Burner and Heater 134 103 Operation Tests .134A 104 Limit Control Cutout Test .134A 105 Continuity of Operation Test
35、 134B 106 Temperature Tests General 135 107 Continuous Operation Test 135 108 Restricted Inlet Test 136 109 Fan Failure Test 136 MARCH 16, 2010 WASTE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 4BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
36、 UL PERFORMANCE BOILERS 109A General .136A PART IV OUTDOOR USE EQUIPMENT CONSTRUCTION 110 General 136A 111 Enclosure 136B 111.1 General .136B 111.2 Corrosion protection .136B 112 Field-Wiring Connections 139 113 Internal Wiring .140 114 Electrical Insulating Material .140 PERFORMANCE 115 Rain Test 1
37、40 116 Wind Test .143 116.1 Wind velocity 40 miles per hour 143 116.2 Wind velocity 10 miles per hour 143 117 Accelerated Aging Test Gaskets, Adhesives, and Sealing Compounds 144 118 Metallic Coating Thickness Test 146 MARKING 119 General .147 APPENDIX A Standards for ComponentsA1 AUGUST 1, 2013 WAS
38、TE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. MAY 14, 2004 WASTE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
39、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART I ALL WASTE OIL-BURNING AIR-HEATING APPLIANCES INTRODUCTION 1 Scope 1.1 These requirements cover air-heating appliances of the central furnace and unit heater types and boiler assemblies intended for burning waste oil fuels and hav
40、ing fuel inputs rated no more than 20 gallons/hour (75.7 liters/hour) or approximately 3,000,000 Btu/hour (3,160,000 kj/hour). 1.1 revised August 1, 2013 1.2 These requirements cover automatically-lighted, mechanical-atomizing type burners that typically are used with these appliances. The burner is
41、 to be factory-installed on or provided with each appliance. 1.3 The burners covered by these requirements are equipped with an automatic primary safety control to prevent the abnormal discharge of oil at the burner in the event of ignition failure or ame failure. 1.4 Requirements for the installati
42、on and use of waste oil-burning appliances are included in the Installation of Oil Burning Equipment, ANSI/NFPA 31. Waste oil-burning appliances are for use only in commercial and industrial applications. 1.5 In addition to being investigated for use with waste oils, the heating appliances covered b
43、y these requirements are investigated for use with a numerical grade of fuel oil, graded according to the Specication for Fuel Oils, ANSI/ASTM D396. 1.6 The terms combustible and noncombustible , as used in these requirements, are dened in the Glossary of Terms Relating to Chimneys, Vents, and Heat-
44、Producing Appliances, ANSI/NFPA 97M. 1.7 Deleted August 1, 2013 2 General 2.1 The term appliance refers to any equipment covered by this standard. The term furnace refers to a central furnace. The term heater refers to a unit heater. 2.2 Values stated without parentheses are the requirement. Values
45、in parentheses are explanatory or approximate information. 2.3 Unless indicated otherwise, all voltage and current values mentioned in this standard are root-mean-square (rms). AUGUST 1, 2013 WASTE OIL-BURNING AIR-HEATING APPLIANCES - UL 296A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
46、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3.1 For the purpose of this standard, the following denitions apply. 3.2 ACCESSIBLE, READILY Capable of being reached easily and quickly for operation, adjustment, and inspection. 3.3 AIR, PRIMARY The air introduced into a burner and that
47、 mixes with the fuel before it reaches the ignition zone. 3.4 AIR, SECONDARY The air externally supplied to the ame at or beyond the point of ignition. 3.5 AIR SHUTTER An adjustable device for varying the size of the air inlet or inlets regulating primary or secondary air. 3.6 APPLIANCE, DIRECT VENT
48、 SYSTEM A self-contained appliance that is inherently constructed so that: a) All air supplied for combustion; b) The combustion system of the appliance; and c) All products of combustion are completely isolated from the atmosphere of the space in which the appliance is installed. 3.7 APPLIANCE, VEN
49、TED An indirect-red appliance provided with a ue collar to accommodate a ue pipe for transporting ue gases to the outer air. 3.7.1 BOILER A closed vessel in which water or some other liquid is heated or in which steam is generated or superheated, under pressure or vacuum, by direct application of heat. 3.7.1 added August 1, 2013 3.7.2 BOILER, HIGH PRESSURE STEAM A boiler in which steam is generated at a pressure higher than 15 psig (103 kPa). 3.7
