UL 539
Standard for Single and Multiple Station Heat Alarms

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2009-01-30DOD Approved: --
Price Code:CANSI Approved: 2017-02-17
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover heat-actuated, single and multiple station heat alarms intended for indoor installation in accordance with the National Fire Alarm Code, NFPA 72, Chapter 11.

    1.2 These requirements do not cover electrically operated single or multiple station smoke or heat alarms.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
          • 4 Installation and Operating Instructions
          • 5 Temperature Classification
          • 6 Electrically Operated Alarms
            • 6.1 Alarm reliability prediction
            • 6.2 Battery removal indicator
        • CONSTRUCTION
          • Mechanically Operated
          • 7 Mounting
          • 8 Calibration
          • 9 Materials
          • 10 Operating Mechanisms
          • 11 Mechanical Assembly
          • 12 Power Supervisory Feature
          • Electrically Operated
          • 13 Accessories
          • 14 Supplementary Signaling Features
          • 15 Servicing and Maintenance Protection
            • 15.1 General
            • 15.2 Sharp edges
          • 16 Enclosure
            • 16.1 General
            • 16.2 Cast metal enclosures
            • 16.3 Sheet metal enclosures
            • 16.4 Nonmetallic enclosures
            • 16.5 Ventilating openings
            • 16.6 Covers
            • 16.7 Glass panels
            • 16.8 Corrosion protection
          • 17 Power Supply
            • 17.1 Primary power supply
            • 17.2 Secondary power supply
            • 17.3 Batteries
            • 17.4 Supplementary signaling circuits
          • 18 Field Wiring
            • 18.1 Permanent connection
            • 18.2 Field-wiring compartment
            • 18.3 Field-wiring terminals
            • 18.4 Field-wiring leads
            • 18.5 Grounded supply terminals and leads
            • 18.6 Power supply cord
            • 18.7 Equipment grounding
            • 18.8 Remote power supply
          • 19 Internal Wiring
            • 19.1 General
            • 19.2 Bonding for grounding
          • 20 Electrical Components
            • 20.1 General
            • 20.2 Bushings
            • 20.3 Lampholders and lamps
            • 20.4 Protective devices
            • 20.5 Printed-wiring boards
            • 20.6 Switches
            • 20.7 Transformers and coils
            • 20.8 Dropping resistors
          • 21 Spacings
        • PERFORMANCE
          • ALL ALARMS
          • 22 General
          • 23 Determination of Spacings
          • 24 Oven Test
          • 25 Fire Test
          • 26 High Temperature Exposure Test
          • 27 Corrosion Tests
          • 28 Operating Temperature Test
          • 29 Vibration Test
          • 30 Humidity Test
          • 31 Low Temperature Exposure Test
          • 32 Audibility Test
            • 32.1 General
            • 32.2 Sound output measurement
            • 32.3 Alarm Duration Test
            • 32.4 Supplementary remote sounding appliances
          • 33 Marking Tag Secureness Test
          • 34 Normal Operation Test
            • 34.1 General
            • 34.2 Standardized alarm signal
          • 35 Jarring Test
          • 36 Effect of Shipping and Storage
          • 37 Dust Test
          • 38 Replacement Test, Head and Cover
          • MECHANICALLY OPERATED ALARMS
          • 39 Endurance Test
          • ELECTRICALLY OPERATED ALARMS
          • 40 Test Voltages
          • 41 Electrical Supervision Test
            • 41.1 General
            • 41.2 AC powered units
            • 41.3 Battery powered (primary or secondary) units
            • 41.4 Component failure
            • 41.5 External wiring
          • 42 Circuit Measurement Test
            • 42.1 Current input
            • 42.2 Battery trouble voltage determination
          • 43 Overvoltage and Undervoltage Tests
            • 43.1 Overvoltage test
            • 43.2 Undervoltage test
          • 44 Temperature Test
          • 45 Transient Tests
            • 45.1 General
            • 45.2 Supply line (high-voltage) transients
            • 45.3 Internally induced transients
            • 45.4 Extraneous transients
            • 45.5 Supply line (low-voltage) circuit transients
          • 46 Static Discharge Test
          • 47 Abnormal Operation Test
          • 48 Sensitivity Test Feature
          • 49 Leakage Current Test
          • 50 Dielectric Voltage-Withstand Test
          • 51 Tests of Thermoplastic Materials
            • 51.1 Accelerated air-oven aging test
            • 51.2 Flame test (3/4 inch)
            • 51.3 Flame test (5 inch)
          • 52 Overload Test
            • 52.1 Detector
            • 52.2 Separately energized circuits
          • 53 Endurance Test
            • 53.1 Heat alarm
            • 53.2 Separately energized circuits
            • 53.3 Audible signaling appliance
            • 53.4 Test means
          • 54 Polarity Reversal Test
          • 55 Electric Shock Current Test
          • 56 Strain Relief Test
            • 56.1 General
            • 56.2 Power-supply cord
            • 56.3 Field-wiring leads
          • 57 Battery Tests
          • 58 Power Supply Tests
            • 58.1 General
            • 58.2 Volt-amperes capacity
            • 58.3 Burnout test
          • 59 Conformal Coatings on Printed-Wiring Boards
            • 59.1 Low voltage printed-wiring boards
            • 59.2 High voltage printed-wiring boards
        • INSTRUCTIONS
          • 60 General
        • MARKING
          • 61 General
    • ELECTRONICALLY OPERATED HEAT ALARM RELIABILITY PREDICTION
    • APPENDIX A
    • APPENDIX B