UL 733:2019 free download

UL 733:2019 free download Oil-Fired Air Heaters and Oil-Fired Direct-Fired Heaters
Scope
1.1 These requirements apply to oil-fired air heaters and oil fired direct-fired heaters.
1.2 Requirements for the installation and use of oil-burning equipment are included in the Standard forthe Installation of Oil-Burning Equipment,NFPA 31.
1.3 This standard is not intended for permanently installed heaters.General
2.1The term “appliance” refers to any equipment covered by this Standard.
2.2Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.
2.3 Except as indicated in 2.4, a component of a product covered by this standard shall comply with therequirements for that component.See Appendix A for a list of standards covering components generallyused in the products covered by this standard.
2.4A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this standard , or
b) ls superseded by a requirement in this standard.
2.5 A component shall be used in accordance with its rating established for the intended conditions ofuse.
2.6Specific components are incomplete in construction features or restricted in performancecapabilities.Such components are intended for use only under limited conditions，such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.
3 Units of Measurement
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.
4Undated References
4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.
5Glossary
5.1For the purpose of this Standard the following definitions apply.
5.2 AIR HEATER – An appliance, manufactured for assembly as a complete unit, intended to supply heated air for space heating and other purposes, equipped with one or more oil burners, safety controls, electrical equipment as needed, and related equipment and provided with a flue collar designed so that combustion products or flue gases are not mixed in the appliance with the medium to be heated. This definition does not include central furnaces, kerosene stoves, oil-burning stoves, or unit heaters..
5.3 AIR SHUTTER – An adjustable device for varying the size of the air inlet or inlets regulating primary and/or secondary air.
5.4 ANTIFLOODING DEVICE – A primary safety control which causes the fuel flow to be shut off upon a rise in fuel level or upon receiving excess fuel, and which operates before the hazardous discharge of fuel can occur.
5.5 APPLIANCE FLUE – The flue passages with in the appliance.
5.6 AUTOMATICALLY LIGHTED APPLIANCE – An appliance in which fuel to the main burner is normally turned on and ignited automatically.
5.7 BAFFLE – An object placed in an appliance to direct the flow of air or flue gases.
5.8 BURNER, MECHANICAL-ATOMIZING TYPE – A power-operated burner which prepares and delivers the oil and all or part of the air by mechanical process in controllable quantities for combustion. Some examples are air atomizing, high and low pressure atomizing, horizontal rotary, vertical rotary atomizing, and vertical rotary wall-flame burners.