UL 1812
Standard for Ducted Heat Recovery Ventilators

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2013-05-03DOD Approved: --
Price Code:CANSI Approved: --
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover ducted heat recovery ventilators intended to remove air from buildings, replace it with outside air, and in the process transfer heat from the warmer to the colder air. These units are intended to be connected to duct systems that interconnect rooms or spaces within buildings for exhausting the indoor air and/or distributing the outdoor air.

    1.2 These requirements cover heat recovery ventilators rated at 600 volts or less, and intended to be installed in ordinary locations in accordance with the National Electrical Code, NFPA 70. These units may also include means for air filtration.

    1.3 These requirements apply to heat recovery ventilators employing gas-, oil-, or gas-oil-fired or electric resistance heating means. The requirements for the construction and performance of gas, oil, and gas-oil burners, heat exchangers, electric resistance heaters, and components for the direct control of the utilization of these heating means are to be those included in other applicable standards.

    1.4 Heat recovery ventilators are intended for installation in accordance with the Standard for the Installation of Air Conditioning and Ventilating Systems, NFPA 90A, and the Standard for the Installation of Warm Air Heating and Air Conditioning Systems, NFPA 90B.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Units of measurement
            • 2.2 Undated references
          • 3 Glossary
          • 4 Installation and Operating Instructions
        • CONSTRUCTION
          • 5 Components
          • 6 General
          • 7 Attachment Plugs, Receptacles, Connectors, and Terminals
          • 8 Protection of Service Personnel
          • 9 Enclosures
            • 9.1 General
            • 9.2 Enclosure thickness
            • 9.3 Doors and covers
            • 9.4 Field wiring system connections
            • 9.5 User servicing
            • 9.6 Electrical components
            • 9.7 Accessibility of uninsulated live parts, film-coated wire, and moving parts
            • 9.8 Bottom closure
            • 9.9 Through-the-floor installation
          • 10 Protection Against Corrosion
          • 11 Materials in Air-Handling Compartments
          • 12 Polymeric and Other Nonmetallic Materials
            • 12.1 General
            • 12.2 Polymeric materials and enclosures
            • 12.3 Material classification
            • 12.4 Ignition sources
            • 12.5 Material applications
          • 13 Power Supply Connections
            • 13.1 Permanently connected appliances
            • 13.2 Leads and terminals
            • 13.3 Cord-connected appliances
            • 13.4 Power Supplies
          • 14 Internal Wiring
            • 14.1 General
            • 14.2 Methods
          • 15 Separation of Circuits
          • 16 Bonding for Grounding
        • ELECTRICAL COMPONENTS
          • 17 Mounting of Components
          • 18 Printed Wiring Boards
          • 19 Live Parts
          • 20 Electrical Insulating Material
          • 21 Supplemental Insulation, Insulating Bushings, and Assembly Aids
          • 22 Motors and Motor Protection
            • 22.1 General
            • 22.2 Overload protection
            • 22.3 Short-circuit protection
          • 23 Motors For Use In Unattended Areas
            • 23.1 General
            • 23.2 Performance
          • 24 Capacitors
          • 25 Circuit Breakers and Fuseholders
          • 26 Overcurrent Protection, General
          • 27 Overcurrent Protection, High-Voltage Control Circuit Conductors
            • 27.1 General
            • 27.2 Direct-connected high-voltage control circuits
            • 27.3 Tapped high-voltage control circuits
            • 27.4 Overcurrent protective devices
          • 28 Transformer Protection
            • 28.1 High-voltage transformer
            • 28.2 Low-voltage transformers
            • 28.3 Overcurrent protective device
          • 29 Switches and Controllers
          • 30 Controls
            • 30.1 General
            • 30.2 Electromechanical and electronic controls
            • 30.3 Motor and speed controls
            • 30.4 Temperature controls
          • 31 Valves (Electrically Operated) and Solenoids
          • 32 Light Sources and Associated Components
          • 33 Safety Devices
        • SPACINGS
          • 34 General
          • 34A Clearance and Creepage Distances
        • PERFORMANCE
          • 35 Installation
            • 35.1 General
            • 35.2 Supply connections
            • 35.3 Assembly, leveling, and adjustable features
          • 36 Test voltage
          • 37 Input Test
          • 38 Normal Temperature Test
          • 39 Overflow Tests
          • 40 Motor Overload Tests
          • 41 Switch Overload Test
          • 42 Dielectric Voltage-Withstand Test
          • 43 Insulation Resistance Test
          • 44 Overvoltage and Undervoltage Tests
          • 45 Tests for Polymeric Materials
            • 45.1 General
            • 45.2 Flammability – 5 inch flame
            • 45.3 Heat deflection test
            • 45.4 Water absorption test
            • 45.5 Air-oven aging
            • 45.6 Tensile-strength test
            • 45.7 Flexural-strength test
            • 45.8 Izod impact test
            • 45.9 Tensile-impact test
            • 45.10 Impact test
            • 45.11 Volume resistivity tests
          • 46 Short-Circuit Tests
          • 47 Starting Test
          • 48 Overload Test – High-Voltage Transformer
          • 49 Burnout Test – High-Voltage Transformer
          • 50 Grounding Means Overload Test
          • 51 Condensation Test
          • 52 Leakage Current Test
          • 53 Continuity of Grounding Circuit Test
          • 54 Humidity Conditioning Test
          • 55 Strain Relief Test
          • 56 Push-Back Test
          • 57 Controls – End Product Test Parameters
            • 57.1 General
            • 57.2 Auxiliary controls
            • 57.3 Operating controls (regulating controls)
            • 57.4 Protective Controls (limiting controls)
            • 57.5 Controls using a temperature sensing device
        • MANUFACTURING AND PRODUCTION TESTS
          • 58 Production Line Dielectric Voltage-Withstand Tests
          • 59 Grounding Continuity Test
        • MARKING
          • 60 Nameplate
          • 61 Supplementary
        • CONSTRUCTION – OUTDOOR-USE EQUIPMENT
          • 62 General
          • 63 Enclosure
            • 63.1 General
            • 63.2 Corrosion protection
          • 64 Field-Wiring Connections
          • 65 Internal Wiring
          • 66 Electrical Insulating Material
        • PERFORMANCE – OUTDOOR-USE EQUIPMENT
          • 67 Rain Test
            • 67.1 General
            • 67.2 Permanently connected appliance
            • 67.3 Cord-connected appliances
            • 67.4 Water resistivity
            • 67.5 Test apparatus
          • 68 Gasket Tests
          • 69 Metallic Coating Thickness Test
        • MARKING – OUTDOOR-USE EQUIPMENT
          • 70 General
    • Appendix A Normative
    • Appendix B Example of Controls Performing as Operating or Protective Controls Informative