• UL 795:8ED 2016-12

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Commercial-Industrial Gas Heating Equipment

    Available format(s):  Hardcopy

    Superseded date:  29-02-2024

    Language(s): 

    Published date:  02-12-2016

    Publisher:  Underwriters Laboratories

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 Glossary
    3 Units of measurement
    4 Components
    Construction - mechanical
    5 General
    Construction - electrical
    6 General
    7 Servicing and adjustment
    8 Electrical enclosures
    9 Field wiring connections
    10 Internal wiring
    11 Separation of circuits
    12 Mounting of components
    13 Motors and motor overcurrent or overload protection
    14 Overcurrent protection of high-voltage control-
        circuit conductors
    15 Overcurrent protection of transformers
    16 Switches and controllers
    17 Capacitors
    18 Electrical insulating material
    19 Spacings - high-voltage circuits
    20 Spacings - low-voltage circuits
    21 Accessibility of uninsulated live parts
    22 Bonding for grounding
    Construction - burner assemblies
    23 General
    24 Controls
    25 Combustion air controls
    26 Primary safety controls
    27 Ignition systems
    28 Fittings and piping
    29 Valves and regulators
    30 Combination gas-oil burner assemblies
    Construction - boilers, furnaces and heaters
    31 General
    32 Accessibility
    33 Baffles
    34 Burner equipment
    35 Operating controls
    36 Limit controls
    37 Installation of external controls and fittings on
        boilers
    38 Flue dampers, draft regulators, and draft hoods
    39 Bleeds and vents
    40 Bases
    41 Heating surfaces and combustion chambers
    42 Radiation shields
    43 Materials in air handling compartments
    44 Casings
    45 Fuel lines and components
    46 Flue collars
    47 Air filters
    Performance
    48 General
    49 Test installations
    50 Test methods
    51 Burner assembly tests
    52 Operation tests
    53 Temperature tests
    54 Low water cutoff of boilers - test no. 17A
    55 Short-circuit - test no. 18
    56 Overload test, high-voltage transformers - test no.
        18A
    57 Burnout test, high-voltage transformers - test no.
        18B
    58 Dielectric voltage-withstand test - test no. 19
    59 Draft hood equipped devices
    60 Flame test
    61 Strain relief test
    Outdoor-use equipment
    62 General
    63 Enclosures
    64 Field wiring connections
    65 Wiring
    66 Outdoor-use equipment tests
    67 Gaskets
    68 Chromic acid dropping test - no. 26
    Manufacturing and production tests
    69 General
    Marking and instructions
    70 Marking
    71 Instructions
    Appendix
    A Standards for components

    Abstract - (Show below) - (Hide below)

    This revision of UL 795 dated September 29, 2020 includes editorial corrections to an equation in paragraph 56.1.5 and a table reference in paragraph 43.2.

    Scope - (Show below) - (Hide below)

    These requirements apply to factory-built gas appliances having inputs of more than 400,000 Btu per hour, per individual combustion chamber which require flame failure and other precautions and which are intended primarily for commercial and industrial installation.

    General Product Information - (Show below) - (Hide below)

    Development Note NEW CHILD REV 1 2020 IS NOW ADDED
    New child REV 3 2022 is added
    Document Type Standard
    Product Note NEW CHILD REV 1 2020 IS NOW ADDED
    New child REV 3 2022 is added
    Publisher Underwriters Laboratories
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    ANSI FC 1 : 2012 STATIONARY FUEL CELL POWER SYSTEMS
    CSA HPIT 2-2017 Dispensing systems and components for fueling hydrogen powered industrial trucks
    ICC 2009 INT. RESI.CODE & COMM.-I1 : 2009 2009 INTERNATIONAL RESIDENTIAL CODE & COMMENTARY - VOLUME 2: CHAPTERS 12 TO 44
    ANSI/CSA AMERICA FC 3-2004 (R2017) PORTABLE FUEL CELL POWER SYSTEMS
    MIL-B-18897 Revision F:1990 BOILERS, STEAM AND HOT WATER, WATERTUBE (STRAIGHT BARE AND FINNED TUBE), CAST IRON AND FIREBOX, PACKAGED TYPE (40,000 TO 35,000 BTU/HR THERMAL OUTPUT CAPACITY)
    MIL-B-23170 Revision A:1978 BOILERS, STEAM, HIGH PRESSURE WATER TUBE, PACKAGED TYPE (5,000 TO 50,000 POUNDS PER HOUR, FIRED BY COAL, OIL, GAS OR COMBINATION OIL/GAS)
    MIL-B-18796 Revision F:1984 BURNERS, SINGLE: OIL, GAS, AND GAS-OIL COMBINATION FOR PACKAGED BOILERS (320,001 TO 125,000,000 BTU/HR THERMAL OUTPUT CAPACITY)
    MIL-B-28684 Base Document:1990 BOILERS, STEAM AND HOT WATER, VERTICAL FIRETUBE AND VERTICAL TUBELESS, PACKAGED TYPE (40,000 TO 10,000,000 BTU/HR THERMAL OUTPUT CAPACITY)
    CSA FC 3 : 2004 PORTABLE FUEL CELL POWER SYSTEMS
    F-B-2910 Base Document:1998 BURNERS, SINGLE: OIL, GAS, AND GAS-OIL COMBINATION FOR PACKAGED BOILERS (320,001 TO 125, 000,000 BTU/HR THERMAL OUTPUT CAPACITY)
    MIL-B-17228 Revision F:1990 BOILERS, STEAM AND HOT WATER, WATERTUBE (COIL AND SERPENTINE), PACKAGED TYPE (40,000 TO 10,000,000 BTU/HR THERMAL OUTPUT CAPACITY)
    ICC IFGC CODE AND COMMENTARY : 2015 IFGC® Code and Commentary
    ANSI/CSA NGV 5.1-2016 (R2020) Residential fueling appliances
    CSA NGV 5.1 : 2016 RESIDENTIAL FUELING APPLIANCES
    ASME CSD1 : 2012 CONTROLS AND SAFETY DEVICES FOR AUTOMATICALLY FIRED BOILERS
    WW-F-2743 Revision A:1998 FURNACES, WARM AIR & HEATERS, UNIT, FORCED AIR CIRCULATION, OIL & GAS FIRED
    CSA/ANSI NGV 5.2-2017 Vehicle fueling appliances (VFA)
    ICC 2012 INTERNATIONAL RESI. CODE : 2012 INTERNATIONAL RESIDENTIAL CODE FOR ONE- AND TWO-FAMILY DWELLINGS
    UL 2106:2ED 2006-04 Standard for Field Erected Boiler Assemblies
    ICC IRC CODE AND COMMENTARY VOLUME 2 : 2015 IRC® Code and Commentary, Volume 2
    NFPA 31 : 2016 INSTALLATION OF OIL-BURNING EQUIPMENT
    ANSI/CSA FC 1:2014 FUEL CELL TECHNOLOGIES - PART 3-100: STATIONARY FUEL CELL POWER SYSTEMS - SAFETY
    NFPA 87 : 2018 FLUID HEATERS
    ICC 2012 INTERNATIONAL FUEL GAS CODE : 2012 INTERNATIONAL FUEL GAS CODE
    CSA C22.2 No. 168 : 2016 COMMERCIAL DISHWASHERS
    UL 921 : 7 COMMERCIAL DISHWASHERS
    ASHRAE HDBK REFRIGERATION : 2014 ASHRAE HANDBOOK - REFRIGERATION
    ANSI Z83.21 : 2016 COMMERCIAL DISHWASHERS

    Standards Referencing This Book - (Show below) - (Hide below)

    UL 514A:11ED 2013-02 Metallic Outlet Boxes
    UL 5085-3:1ED 2006-04 Low Voltage Transformers - Part 3: Class 2 and Class 3 Transformers
    UL 506:14ED 2017-06 Specialty Transformers
    UL 83:16ED 2017-07 Standard for Thermoplastic-Insulated Wires and Cables
    UL 4248-9:1ED 2007-02 Fuseholders - Part 9: Class K
    UL 60730-2-9:4ED 2017-02 Automatic Electrical Controls - Part 2-9: Particular Requirements for Temperature Sensing Controls
    UL 6 : 2014 ELECTRICAL RIGID METAL CONDUIT - STEEL
    UL 296:11ED 2017-02 Oil Burners
    UL 514C:4ED 2014-04 Nonmetallic Outlet Boxes, Flush-Device Boxes, and Covers
    UL 248-1 : 3 LOW-VOLTAGE FUSES - PART 1: GENERAL REQUIREMENTS
    UL 60730-1:5ED 2016-08 Automatic Electrical Controls - Part 1: General Requirements
    UL 2250:3ED 2017-03 Instrumentation Tray Cable
    UL 248-5:2ED 2000-08 Standard for Low-Voltage Fuses - Part 5: Class G Fuses
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