UL 399
Standard for Drinking-Water Coolers

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2017-03-30DOD Approved: --
Price Code:DANSI Approved: 2018-08-29
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover self-contained drinking-water coolers employing hermetic refrigerant motor-compressors or thermoelectric water chilling systems and designed for connection to alternating-current circuits rated not greater than 600 volts in accordance with the National Electrical Code, NFPA 70. The following types of water coolers are included within the scope of this Standard:

    a)    Those supplying cold water or both cold and hot water;

    b)    Battery operated;

    c)    Those employing flammable refrigerant as defined in Supplement sb ; and

    d)    Those provided with ultraviolet (UV) radiation lamp systems in which the UV wavelengths are 200 nm or greater; however, the effectiveness of the water treatment by the UV radiation is not covered by these requirements.

    1.2 These requirements do not include additional requirements applicable to equipment designed for use in hazardous locations as defined in the National Electrical Code, NFPA 70.

    1.3 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to maintain the acceptable level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard cannot be judged to comply with this standard. Where considered appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Units of measurement
          • 3 Undated references
          • 4 Reserved for future use
          • 5 Glossary
          • 6 Installation And Operating Instructions
        • CONSTRUCTION
          • 7 General
          • 8 Nonmetallic Material
            • 8.1 Classification
            • 8.2 Ignition Sources
            • 8.3 Application and Location
          • 9 Assembly
            • 9.1 General
            • 9.2 Pressurized beverage product system
            • 9.3 Mechanical protection
            • 9.4 Electrical protection
          • 10 Barriers
          • 11 Accessories
          • 12 Enclosures
            • 12.1 General
            • 12.2 Doors and covers
            • 12.3 Enclosures exposed to weather
          • 13 Field Supply Connections for Permanently Connected Water Coolers
            • 13.1 General
            • 13.2 Terminals
            • 13.3 Leads
            • 13.4 Grounding
          • 14 Supply Connections – Cord Connected Equipment
          • 15 Internal Wiring And Wiring Methods
          • 16 Separation of Circuits
          • 17 Bonding for Grounding
          • 18 Button or Coin Cell Batteries
        • ELECTRICAL COMPONENTS
          • 19 Current-Carrying Parts
          • 20 Insulating Material
          • 21 Switches And Controllers
          • 22 Remotely Operated Water Coolers
          • 23 Motors
          • 24 Motor Overload Protection
            • 24.1 General
            • 24.2 Protection of single-phase nonhermetic motors
            • 24.3 Protection of single-phase hermetic refrigerant motor-compressors
            • 24.4 Protection of three-phase motors
            • 24.5 Protective electronic circuits
          • 25 Electric Water Heaters
            • 25.1 Heater elements
            • 25.2 Water heater thermal cutoffs
          • 26 Valves and Solenoids
          • 27 Capacitors
          • 28 Transformers
          • 29 Batteries and Battery Chargers
          • 30 Circuit Breakers, Fusing Resistors and Supplementary Protectors
          • 31 Connectors
          • 32 Electrical Cable, Conduit and Tubing
          • 33 Electrical Insulation Systems
          • 34 Electromagnetic Interference Filters
          • 35 Fuses and Fuseholders
          • 36 Lighting Systems
          • 37 Optical Isolators and Semiconductor Devices
          • 38 Outlet Boxes
          • 39 Power Supplies
          • 40 Receptacles
          • 41 Terminal Blocks
          • 42 Wireways, Auxiliary Gutters and Associated Fittings
          • 43 Ultraviolet (UV) Radiation Systems
          • 44 Across-The-Line Capacitors, Antenna-Coupling Components, Line-Bypass Components and Fixed Capacitors for Use in Electronic Equipment
          • 45 Information Technology Equipment
        • SPACINGS
          • 46 High-Voltage Circuits
          • 47 Extra Low-Voltage Circuits
          • 48 Alternate Spacings – Clearances and Creepage Distances
        • REFRIGERATION SYSTEM
          • 49 Refrigerant
          • 50 Pump-Down Capacity
          • 51 Refrigerant Tubing and Fittings
          • 52 Refrigerant-Containing Parts
          • 53 Pressure-Limiting Device
          • 54 Pressure Relief
            • 54.1 General
            • 54.2 Required discharge capacity
            • 54.3 Relief valves
        • THERMOELECTRIC SYSTEM
          • 55 General
        • WATER SYSTEM
          • 56 General
        • PERFORMANCE
          • 57 General
            • 57.1 Instrumentation
            • 57.2 Ambient temperature
          • 58 Tests on Nonmetallic Materials
            • 58.1 General
            • 58.2 Burnout test – Impedance protected motors
            • 58.3 Fastener strength test
          • 59 Test Voltage
          • 60 Leakage Current Test – Cord Connected Water Coolers
          • 61 Input Test
          • 62 Temperature and Pressure Test
          • 63 Dielectric Voltage-Withstand Test
          • 64 Condenser Fan Motor Failure Test
          • 65 Condenser Water Failure Test
          • 66 Overflow Test
          • 67 Spill Test
          • 68 Rain Test
          • 69 Stability Test
          • 70 Static Loading Test
          • 70A Cabinet/Enclosure Static Load Test
          • 70B Cabinet/Enclosure Impact Test
          • 71 Ozone Test
          • 72 Strain Relief Test
          • 73 Water Heating Protective Controls Tests
            • 73.1 Endurance test
            • 73.2 Calibration test
          • 74 Overload and Endurance Test for Operating Controls
          • 75 Burnout Test
            • 75.1 Water heater
            • 75.2 Thermoelectric water coolers
            • 75.3 Other components
          • 76 Overvoltage and Undervoltage Tests
          • 77 Current Overload Test – Bonding Conductors and Connections
          • 78 Insulation Resistance Test
            • 78.1 Water heaters
            • 78.2 Thermal and/or acoustical insulating material
          • 79 Limited Short-Circuit Test
            • 79.1 General
            • 79.2 Motor overload protective devices
            • 79.3 Bonding conductors and connections
            • 79.4 Motor circuit conductors and connections
          • 79A Switch Mode Power Supply Units – Overload Test
          • 80 Protective Devices – Maximum Continuous Current Test
          • 81 Strength Tests – Pressure Containing Components
            • 81.1 General
            • 81.2 High-side parts
            • 81.3 Low-side parts
            • 81.4 Leakage at gaskets or seals
            • 81.5 Water-heating tanks
            • 81.6 Pressurized beverage product system
            • 81.7 Water-containing parts for pressure-type water coolers
          • 82 Start-To-Discharge Test
          • 83 Protective Electronic Circuit Tests
            • 83.1 General
            • 83.2 Fault conditions abnormal test
            • 83.3 Electromagnetic compatibility (EMC) tests
            • 83.4 Programmable component reduced supply voltage test
            • 83.5 Fuse-link test
          • 84 Accelerated Aging Test – Electric Heaters
          • 85 Reliability Test – Heater Terminations
          • 86 Accelerated Aging Tests on Gaskets, Sealing Compounds, and Adhesives
          • 87 Ultraviolet Irradiance Test
          • 88 Metallic Coating Thickness Test
          • 89 Marking Label Adhesion Tests
            • 89.1 General
            • 89.2 Oven-aging test
            • 89.3 Immersion test
            • 89.4 Standard-atmosphere test
            • 89.5 Unusual-condition exposure test
          • 90 Refrigerant Identification Tests
            • 90.1 General
            • 90.2 Infrared analysis
            • 90.3 Gas chromatography analysis
        • MANUFACTURING AND PRODUCTION TESTS
          • 91 Pressure Tests
          • 92 Production Fatigue Test
          • 93 Production Line Dielectric Voltage-Withstand Tests
          • 94 Production Line Grounding Continuity Tests
          • 95 Annual Refrigerant Identification
          • 96 Protective Electronic Circuit Test
        • MARKING
          • 97 General
          • 98 Accessories
          • 99 Permanently Connected Water Coolers
          • 100 Cord Connected Water Coolers
    • REQUIREMENTS FOR DRINKING WATER COOLERS EMPLOYING A FLAMMABLE REFRIGERANT IN THE REFRIGERATING SYSTEM
    • APPENDIX A
    • APPENDIX B