Definitions - Central Boiler

41 February 2019 DefinitionsDEFINITIONSASTMA merican Society for Testing and Materials. Publishes standard specifications for terminology, labeling, testing and Thermal Unit (Btu)The British thermal unit is a unit of measure equal to the amount of heat necessary to raise the temperature of one pound of water one degree process of heat transfer whereby heat moves through a material or between two materials that are in direct contact with each transfer of heat by movement of a liquid or a gas. Natural Convection is a result of movement caused by changes in density as temperature changes within a fluid medium such as a liquid or a gas.

Differential Temperature (ΔT) The difference in temperature between two opposing masses used to describe the potential that exists for heat transfer. FIP ... Fan Relay Fan Switch or Snap Disc on Furnace Black Brown Fan Speed Tap Wires (Connect Prefered Speed Tap Wire) C G R W2 E/W1 Y1 (O/B)Y2 L 24-Volt Thermostat C is optional

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