15Heater Component FunctionBarrel (Case)Upright sheet metal case component. Acts as a chimney todistribute heat to surrounding area.BaseSheet metal case platform used to support and stabilizeburner and barrel assemblies.BurnerComponent at which combustion of fuel gases takes place.Burner OrificeBrass metering device used to feed gas to burner at aspecific rate, with the appropriate pressure.Gas HoseFlexible connector used to convey gas from supply line orcylinder to heater.Main Burner ValveThis valve is located between the pilot safety, gas controlvalve and burner. It is manually operated and is used toopen or close the main fuel supply to the burner.Pilot Light OrificeSmall metering device used to supply gas for the dualpurpose of igniting the main burner and heating thethermocouple. Works directly in conjunction with thethermocouple.Pilot Safety Gas Control ValveA gas control valve which is held open by electrical powersupplied by a pilot thermocouple and which closesautomatically to shut off the flow of gas to the main burnerwhen pilot flame is extinguished or becomes too small tolight the main burner.Pilot LineTubing used to convey gas from gas control valve to pilotlight orifice.RegulatorThe heart of any gas supply installation. Used to deliver aworking pressure to the appliance under varying conditionsin tank pressure.ThermocoupleA thermoelectric device that converts heat directly intoelectrical energy. Works in conjunction with electromagnetin gas control valve thereby assisting in maintaining gassupply for the pilot light.Top (Case)Formed sheet metal case component assembled onto barreltop used to deflect heat out to surrounding area.