1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1812 Ducted Heat Recovery VentilatorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
2、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Ducted Heat Recovery Ventilators, UL 1812 Fourth Edition, Dated May 3, 2013 Summary of Topics This new edition of UL 1812, includes the following: 1. Relocation of the component requirements from Appendix A into t
3、he body of the standard 2. Updates to 14.1.7 and 14.1.8 to use thermoset-insulated conductors terminology 3. Revisions to remove “HACR type” from circuit breaker requirements as all circuit breakers meet the requirements of HACR type The new and/or revised requirements are substantially in accordanc
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7、d the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resul
8、ting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective da
9、tes as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. MAY 3, 2013 UL 1812 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED F
10、OR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 3, 2013 UL 1812 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 3, 2013 1 UL 1812 Standard for Ducted Heat Recovery Ventilators First Edition
11、April, 1990 Second Edition April, 1995 Third Edition October, 2009 Fourth Edition May 3, 2013 This UL Standard for Safety consists of the Fourth Edition. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal R
12、equest in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standar
13、ds shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 2 No Text on This PageUL COPYRIGHTED M
14、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 General 7 2.1 Units of measurement .7 2.2 Undated references .7 3 Glossary .8 4 Installation and Operating Instructions 10 CONSTRUCTION 5 Components 10 6 General .11 7 Attach
15、ment Plugs, Receptacles, Connectors, and Terminals 12 8 Protection of Service Personnel .13 9 Enclosures 14 9.1 General 14 9.2 Enclosure thickness .15 9.3 Doors and covers .18 9.4 Field wiring system connections .19 9.5 User servicing .20 9.6 Electrical components 21 9.7 Accessibility of uninsulated
16、 live parts, lm-coated wire, and moving parts 22 9.8 Bottom closure 27 9.9 Through-the-oor installation 30 10 Protection Against Corrosion .31 11 Materials in Air-Handling Compartments .31 12 Polymeric and Other Nonmetallic Materials 32 12.1 General .32 12.2 Polymeric materials and enclosures 33 12.
17、3 Material classication .33 12.4 Ignition sources 34 12.5 Material applications 36 13 Power Supply Connections 36 13.1 Permanently connected appliances .36 13.2 Leads and terminals 39 13.3 Cord-connected appliances 42 13.4 Power Supplies 44 14 Internal Wiring 44 14.1 General .44 14.2 Methods 47 15 S
18、eparation of Circuits .48 16 Bonding for Grounding 50 ELECTRICAL COMPONENTS 17 Mounting of Components 54 18 Printed Wiring Boards .55 19 Live Parts 55 20 Electrical Insulating Material 55 MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
19、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 21 Supplemental Insulation, Insulating Bushings, and Assembly Aids 56 22 Motors and Motor Protection .56 22.1 General .56 22.2 Overload protection .57 22.3 Short-circuit protection 60 23 Motors For Use In Unattended Areas .61 23.1 General .61 23.2 P
20、erformance .62 24 Capacitors .63 25 Circuit Breakers and Fuseholders .63 26 Overcurrent Protection, General 64 27 Overcurrent Protection, High-Voltage Control Circuit Conductors .64 27.1 General .64 27.2 Direct-connected high-voltage control circuits 65 27.3 Tapped high-voltage control circuits 65 2
21、7.4 Overcurrent protective devices .66 28 Transformer Protection 66 28.1 High-voltage transformer 66 28.2 Low-voltage transformers 68 28.3 Overcurrent protective device 69 29 Switches and Controllers 70 30 Controls .71 30.1 General .71 30.2 Electromechanical and electronic controls .72 30.3 Motor an
22、d speed controls .72 30.4 Temperature controls .73 31 Valves (Electrically Operated) and Solenoids .73 32 Light Sources and Associated Components 73 33 Safety Devices .74 SPACINGS 34 General 74 PERFORMANCE 35 Installation .76 35.1 General .76 35.2 Supply connections .78 35.3 Assembly, leveling, and
23、adjustable features .78 36 Test voltage 78 37 Input Test 79 38 Normal Temperature Test 79 39 Overow Tests .82 40 Motor Overload Tests .83 41 Switch Overload Test .84 42 Dielectric Voltage-Withstand Test .84 43 Insulation Resistance Test .85 44 Overvoltage and Undervoltage Tests 85 45 Tests for Polym
24、eric Materials .86 45.1 General .86 45.2 Flammability 5 inch ame 86 45.3 Heat deection test .87 MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 45.4 Water absorption test .87 45.5 Air-o
25、ven aging .87 45.6 Tensile-strength test 88 45.7 Flexural-strength test .88 45.8 Izod impact test 88 45.9 Tensile-impact test .89 45.10 Impact test .89 45.11 Volume resistivity tests .89 46 Short-Circuit Tests 90 47 Starting Test .91 48 Overload Test High-Voltage Transformer 92 49 Burnout Test High-
26、Voltage Transformer 92 50 Grounding Means Overload Test .93 51 Condensation Test 93 52 Leakage Current Test .95 53 Continuity of Grounding Circuit Test .98 54 Humidity Conditioning Test .98 55 Strain Relief Test .99 56 Push-Back Test .100 57 Controls End Product Test Parameters .100 57.1 General 100
27、 57.2 Auxiliary controls 100 57.3 Operating controls (regulating controls) 101 57.4 Protective Controls (limiting controls) 102 57.5 Controls using a temperature sensing device .104 MANUFACTURING AND PRODUCTION TESTS 58 Production Line Dielectric Voltage-Withstand Tests 104 59 Grounding Continuity T
28、est 105 MARKING 60 Nameplate 105 61 Supplementary 108 CONSTRUCTION OUTDOOR-USE EQUIPMENT 62 General 112 63 Enclosure .112 63.1 General 112 63.2 Corrosion protection .112 64 Field-Wiring Connections .115 65 Internal Wiring .115 66 Electrical Insulating Material 115 PERFORMANCE OUTDOOR-USE EQUIPMENT 6
29、7 Rain Test .116 67.1 General 116 67.2 Permanently connected appliance .116 67.3 Cord-connected appliances .120 67.4 Water resistivity .121 MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
30、UL 67.5 Test apparatus 122 68 Gasket Tests 122 69 Metallic Coating Thickness Test .124 MARKING OUTDOOR-USE EQUIPMENT 70 General 125 MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRO
31、DUCTION 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 sp
32、aces 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 als
33、o include means for air ltration. 1.3 These requirements apply to heat recovery ventilators employing gas-, oil-, or gas-oil-red or electric resistance heating means. The requirements for the construction and performance of gas, oil, and gas-oil burners, heat exchangers, electric resistance heaters,
34、 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
35、90A, and the Standard for the Installation of Warm Air Heating and Air Conditioning Systems, NFPA 90B. 2 General 2.1 Units of measurement 2.1.1 Unless otherwise indicated, all voltage and current values mentioned in this standard are rms. 2.1.2 Values stated without parentheses are the requirement.
36、Values in parentheses are explanatory or approximate information. 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. MAY 3, 2013 DUCTED HEAT RECOVERY
37、 VENTILATORS - UL 1812 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3.1 For the purpose of this standard, the following denitions apply. 3.2 BARRIER A partition for the insulation or isolation of electrical circuits or isolati
38、on of electrical arcs. 3.3 CONTROL, AUTOMATIC A control in which at least one aspect is non-manual. 3.4 CONTROL, AUXILIARY A device or assembly of devices that provides a functional utility, is not relied upon as an operational or protective control, and therefore is not relied upon for safety. For
39、example, an efficiency control not relied upon to reduce the risk of electric shock, re, or injury to persons during normal or abnormal operation of the end product is considered an auxiliary control. 3.5 CONTROL, MANUAL A device that requires direct human interaction to activate or rest the control
40、. 3.6 CONTROL, OPERATING A device or assembly of devices, the operation of which starts or regulates the end product during normal operation. For example, a thermostat, the failure of which a thermal cutout/limiter or another layer of protection would mitigate the potential hazard, is considered an
41、operating control. Operating controls are also referred to as “regulating controls”. 3.7 CONTROL, PROTECTIVE A device or assembly of devices, the operation of which is intended to reduce the risk of electric shock, re or injury to persons during normal and reasonably anticipated abnormal operation o
42、f the appliance. For example, a thermal cutout/limiter, or any other control/circuit relied upon for normal and abnormal conditions, is considered a protective control. Protective controls are also referred to as “limiting controls” and “safety controls”. 3.8 CONTROL, TYPE 1 The actuation of an auto
43、matic control for which the manufacturing deviation and the drift (tolerance before and after certain conditions) of its operating value, operating time, or operating sequence has not been declared and tested under this standard. 3.9 CONTROL, TYPE 2 The actuation of an automatic control for which th
44、e manufacturing deviation and the drift (tolerance before and after certain conditions) of its operating value, operating time, or operating sequence have been declared and tested under this standard. 3.10 CONTROL CIRCUIT the circuit that carries the electric signals directing the performance of a c
45、ontroller. A control circuit does not carry the main power current. 3.11 CONTROLLER A device or group of devices that governs power delivered to a motor or other load in the equipment. 3.12 DIRECT-CONNECTED HIGH-VOLTAGE CONTROL CIRCUIT A circuit that is supplied from a branch circuit separate from a
46、 branch circuit that supplies other loads within the equipment. It is not tapped from the load side of the overcurrent device(s) of the controlled circuit(s) within the equipment. 3.13 ENCLOSURE That part of a unit which by itself or in conjunction with barriers reduces the risk of contacting all or
47、 any parts of the unit that may otherwise present a risk of electric shock or injury to persons and/or prevents propagation of ame initiated by electrical disturbances occurring within. 3.14 FUNCTIONAL PART A part other than an enclosure or structural part that is necessary for the intended operatio
48、n of a unit. MAY 3, 2013 DUCTED HEAT RECOVERY VENTILATORS - UL 1812 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.15 HIGH-VOLTAGE CIRCUIT A circuit involving a potential of not more than 600 volts and having circuit characteristics in e
49、xcess of those of a low-voltage circuit. 3.16 LOW-VOLTAGE CIRCUIT A circuit involving a potential of not more than 30 volts alternating current (42.4 volts peak) or direct current, and supplied by: a) a primary battery, b) a Class 2 transformer, or c) a combination of transformer and xed impedance which, as a unit, complies with all the performance requirements for a Class 2 transformer. A circuit derived from a high-voltage circuit by connecting resistance in series with
