UL 295
Standard for Commercial-Industrial Gas Burners

DETAILS
Edition Number:2SCC Approved:--
Edition Date:2017-02-08DOD Approved: --
Price Code:CANSI Approved: 2019-08-15
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover commercial-industrial gas burners with input ratings over 400,000 Btu per hour (117.23 kW) intended for installation in heating equipment such as, but not limited to, appliances, furnaces, heaters, ovens, water heaters, and incinerators. These gas burners are required to be equipped with integral automatic primary safety controls to restrict the abnormal flow of gaseous fuel in case of ignition failure and/or flame failure.

    1.2 Additional installation and operation requirements are available for commercial-industrial gas burners, as defined by the National Fuel Gas Code, NFPA 54 and by the Liquefied Petroleum Gas Code, NFPA 58, as applicable.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 General
          • 7 Corrosion Protection
          • 8 Protection of Users and Service Personnel
          • 9 Enclosures
            • 9.1 General
            • 9.2 Accessibility of uninsulated live parts and film-coated wire - general
            • 9.3 Doors and covers
            • 9.4 Field wiring system connection
          • 10 General Components and Devices
        • CONSTRUCTION – ELECTRICAL COMPONENTS
          • 11 Field Wiring
            • 11.1 General
            • 11.2 Leads and terminals
          • 12 Internal Wiring
            • 12.1 General
            • 12.2 Methods
            • 12.3 Short-circuit protection
          • 13 Separation of Circuits
          • 14 Bonding for Grounding
          • 15 Mounting of Electrical Components
          • 16 Motors
            • 16.1 General
            • 16.2 Motor overload protection
          • 17 Overcurrent Protection of High-Voltage Control-Circuit Conductors
            • 17.1 General
            • 17.2 Direct-connected high-voltage control circuit
            • 17.3 Tapped high-voltage control circuits
            • 17.4 Overcurrent-protective devices
          • 18 Overcurrent Protection of Transformers
            • 18.1 High-voltage transformers – General
            • 18.2 High-voltage transformers – Thermal protection
            • 18.3 High-voltage transformers – Overcurrent protection
            • 18.4 Low-voltage transformers – General
            • 18.5 Low-voltage transformers – Overcurrent protective devices
          • 19 Switches and Controllers
          • 20 Capacitors
          • 21 Electrical Insulating Materials
        • CONSTRUCTION – ELECTRICAL SPACINGS
          • 22 High-Voltage Circuits
          • 23 Low-Voltage Circuits
        • CONSTRUCTION – CONTROLS AND SAFETY DEVICES
          • 24 Assembly
          • 25 Accessibility for Servicing
          • 26 Fan Housings and Air Tubes
          • 27 Combustion Air Control
          • 28 Fittings, and Piping and Tubing
          • 29 Valves and Regulators
            • 29.1 Automatic safety shutoff valves – General
            • 29.2 Manually operated valves
            • 29.3 Gas pressure regulators
          • 30 Bleeds and Vents
          • 31 Gauges
          • 32 Ignition Systems – General
          • 33 Electric High-Tension Ignition
            • 33.1 Spark igniters
            • 33.2 Electrode and bus bars
            • 33.3 Insulators
            • 33.4 Leads
            • 33.5 Transformers
          • 34 Gas Pilots
          • 35 Control Applications
          • 36 Primary Safety Controls
          • 37 Purge and Combustion Air Monitoring Controls
          • 38 Gas Pressure Controls
          • 39 Interlocks
          • 40 Combination Gas-Oil Burners
        • PERFORMANCE
          • 41 Test Methods
            • 41.1 Firing conditions
            • 41.2 Temperature measurements
            • 41.3 Test installation
            • 41.4 Test voltage
          • 42 Power Input Test
          • 43 Combustion Test
          • 44 Endurance Test
          • 45 Combustion Air Failure Test
          • 46 Undervoltage Test
          • 47 Power Interruption Test
          • 48 Pilot Supervision Test
          • 49 Ignition Test, Gas-Electric High Tension
          • 50 Ignition Test, Multiple Burner
          • 51 Delayed Ignition Test
          • 52 Temperature Test
          • 53 Strain Relief Test
          • 54 Fuel Changeover Test – Combination Gas-Oil-Fired Burner Assemblies
          • 55 Short-Circuit Test
          • 56 Overload Test, High-Voltage Transformers
          • 57 Burnout Test, High-Voltage Transformers
          • 58 Dielectric Voltage-Withstand Test
            • 58.1 General
            • 58.2 Dielectric withstand – Ignition assembly
            • 58.3 Dielectric withstand – Electrode insulator
        • MANUFACTURING AND PRODUCTION TESTS
          • 59 General
          • 60 Production Line Dielectric Voltage-Withstand Test
        • MARKINGS
          • 61 General
          • 62 Nameplate
          • 63 Supplemental Marking
        • INSTRUCTIONS
          • 64 General