UL 296A
Standard for Waste Oil-Burning Air-Heating Appliances

DETAILS
Edition Number:3SCC Approved:--
Edition Date:2018-08-02DOD Approved: --
Price Code:DANSI Approved: 2018-10-08
Type:ulstd

  • SCOPE

    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 having 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).

    1.2 These requirements cover automatically-lighted, mechanical-atomizing type burners that typically are used with these appliances. The burner is 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 flame failure.

    1.4 Requirements for the installation 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 by these requirements are investigated for use with a numerical grade of fuel oil, graded according to the Specification for Fuel Oils, ANSI/ASTM D396.

    1.6 The terms "combustible" and "noncombustible", as used in these requirements, are defined in the Glossary of Terms Relating to Chimneys, Vents, and Heat-Producing Appliances, ANSI/NFPA 97M.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • PART I – ALL WASTE OIL-BURNING AIR-HEATING APPLIANCES
          • INTRODUCTION
          • 1 Scope
          • 2 General
          • 3 Glossary
          • 4 Components
          • CONSTRUCTION
          • 5 Protection of Users and Service Personnel
          • 6 Enclosures
            • 6.1 General
            • 6.2 Doors and covers
            • 6.3 Field wiring system connections
          • 7 Field Wiring
            • 7.1 General
            • 7.2 Leads and terminals
          • 8 Internal Wiring
            • 8.1 General
            • 8.2 Methods
            • 8.3 Short circuit protection
          • 9 Separation of Circuits
          • 10 Grounding and Bonding
          • ELECTRICAL COMPONENTS
          • 11 General
          • 12 Mounting of Electrical Components
          • 13 Motors and Motor Overload Protection
          • 14 Overcurrent Protection of High-Voltage Control-Circuit Conductors
            • 14.1 General
            • 14.2 Direct-connected high-voltage control circuit
            • 14.3 Tapped high-voltage control circuits
            • 14.4 Overcurrent-protective devices
          • 15 Overcurrent Protection of Transformers
            • 15.1 High-voltage transformers
            • 15.2 Low-voltage transformers
            • 15.3 Overcurrent protective devices
          • 16 Switches and Controllers
          • 17 Capacitors
          • 18 Electrical Insulating Materials
          • SPACINGS
          • 19 High-Voltage Circuits
          • 20 Low-Voltage Circuits
          • PERFORMANCE
          • 21 General
          • 22 Test Fuels
          • 23 Instrumentation
            • 23.1 Draft
            • 23.2 Fuel input
            • 23.3 Power measurement
            • 23.4 Speed measurement
            • 23.5 Static pressure
            • 23.6 Temperature measurement
          • 24 Test Voltage
          • 25 Power Input Test
          • 26 Temperature Test
          • 27 Stalled Fan Motor Test
          • 28 Short-Circuit Test
          • 29 Overload Test, High-Voltage Transformers
          • 30 Burnout Test, High-Voltage Transformers
          • 31 Dielectric Voltage-Withstand Test – Appliance
          • MANUFACTURING AND PRODUCTION TESTS
          • 32 General
          • 33 Production Line Dielectric Voltage-Withstand Test
          • MARKINGS
          • 34 Nameplate
          • 35 Supplementary
          • INSTRUCTIONS
          • 36 General
        • PART II – BURNERS
          • CONSTRUCTION
          • 37 General
          • 38 Materials
          • 39 Assembly
          • 40 Accessibility for Servicing
          • 41 Fan Housings and Air Tubes
          • 42 Combustion Air Controls
          • 43 Fuel Strainers
          • 44 Fittings, Piping, and Tubing
          • 45 Valves
          • 46 Gauges
          • 47 Ignition Systems
          • 48 Electric High-Tension Ignition
            • 48.1 Assembly
            • 48.2 Electrode and bus bars
            • 48.3 Insulators
            • 48.4 Leads
            • 48.5 Transformers
          • 49 Gas Pilots
          • 50 Control Applications
          • 51 Primary Safety Controls
          • 52 Oil Atomization Control
          • 53 Interlocks
          • 54 Oil Heating Equipment
          • 55 Air Atomizing Equipment
          • 56 Combination Gas-Oil Burners
          • PERFORMANCE
          • 57 General
          • 58 Combustion Tests
            • 58.1 Mechanical-atomizing burners general
            • 58.2 Extended operation
          • 59 Combustion Air Failure Test
          • 60 Interruption of Atomization Test
          • 61 Undervoltage Operation Test
          • 62 Power Interruption Test
          • 63 Continuous Operation Temperature Test
          • 64 Ignition Tests, Multiple Igniters
          • 65 Ignition Tests, Electric High-Tension
            • 65.1 Reduced voltage – cold oil
            • 65.2 Combustion detectors
          • 66 Ignition Tests, Gas Pilot
            • 66.1 Reduced voltage
            • 66.2 Pilot supervision
            • 66.3 Flame failure response
            • 66.4 Stability
          • 67 Ignition Test, Gas-Electric System
          • 68 Ignition Tests, Gas-Electric High-Tension System
            • 68.1 Reduced voltage – cold oil
            • 68.2 Dielectric voltage-withstand – burner
            • 68.3 Dielectric voltage-withstand – electrode insulators
          • 69 Ignition Test, Multiple-Atomizer Burner
          • 70 Abnormal Operation Test – Oil Heating
        • PART III - BOILERS, FURNACES, AND HEATERS
          • CONSTRUCTION
          • 71 Assembly
          • 72 Accessibility for Servicing
          • 73 Disposal of Combustion Products
          • 74 Base
          • 75 Casing
          • 76 Radiation Shields or Liners
          • 77 Materials in Air Handling Compartments
          • 78 Air Filters
          • 79 Combustion Chamber
          • 80 Radiators
          • 81 Heating Surface Joints
          • 82 Baffles
          • 83 Flue Collars
          • 84 Dampers and Draft Regulators
          • 85 Controls
            • 85.1 Application
            • 85.2 Limit control
            • 85.3 Fan control
          • PERFORMANCE – CENTRAL FURNACES
          • 86 General
          • 87 Test Installation for Standard Clearances
            • 87.1 Downflow and upflow furnaces enclosure
            • 87.2 Chimney connector
            • 87.3 Air outlet and inlet – forced air furnace
            • 87.4 Horizontal furnace enclosure
            • 87.5 Chimney connector
            • 87.6 Air outlet and inlet
          • 88 Initial Test Conditions
          • 89 Combustion Test – Burner and Furnace
          • 90 Operation Tests
          • 91 Limit Control Cutout Test
          • 92 Continuity of Operation Test
          • 93 Airflow Test – Downflow and Horizontal Furnaces
          • 94 Temperature Tests – General
          • 95 Continuous Operation Test
          • 96 Restricted Inlet Test
          • 97 Fan Failure Test
          • 98 Blocked Outlet Test
          • PERFORMANCE – UNIT HEATERS
          • 99 General
          • 100 Test Installation
            • 100.1 Floor-mounted heaters
            • 100.2 Suspended type heaters
          • 101 Initial Test Conditions
          • 102 Combustion Test – Burner and Heater
          • 103 Operation Tests
          • 104 Limit Control Cutout Test
          • 105 Continuity of Operation Test
          • 106 Temperature Tests – General
          • 107 Continuous Operation Test
          • 108 Restricted Inlet Test
          • 109 Fan Failure Test
          • PERFORMANCE – BOILERS
          • 110 General
        • PART IV – OUTDOOR USE EQUIPMENT
          • CONSTRUCTION
          • 111 General
          • 112 Enclosure
            • 112.1 General
            • 112.2 Corrosion protection
          • 113 Field-Wiring Connections
          • 114 Internal Wiring
          • 115 Electrical Insulating Material
          • PERFORMANCE
          • 116 Rain Test
          • 117 Wind Test
            • 117.1 Wind velocity 40 miles per hour
            • 117.2 Wind velocity 10 miles per hour
          • 118 Accelerated Aging Test – Gaskets, Adhesives, and Sealing Compounds
          • 119 Metallic Coating Thickness Test
          • MARKING
          • 120 General
    • APPENDIX A