L.B. White GUARDIAN AB250 Owner's Manual And Instructions

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Contents

L.B. White GUARDIAN AB250 Owner's Manual And Instructions Manual pdf 15 page image

15Heater Component FunctionAir Proving SwitchSafety device used to insure that the proper air flow is beingachieved before the gas valve is opened.BurnerCast iron component used to channel gas and provide anarea at which the fuel may ignite.Burner OrificeBrass metering device used to feed gas to burner at aspecific rate.Fan HousingChamber used for compressing air for efficient airmovement.Fan WheelComponent used in conjunction with the motor and fanhousing to pull the hot air from heater and blow it into roomfor heating (also known as a “squirrel cage”).Gas HoseFlexible connector used to convey gas from supply line inbuilding to heater.Heat ChamberMetal fire box within the appliance that provides an areawhere burner flame mixes with combustion air therebyproviding heat.High Limit SwitchSafety device wired into the control system which is used tobreak an electrical circuit to the gas control valve in event ofoverheat situation.MotorElectric device used to force preheated air through theheater and to circulate heat within a certain area. Convertselectrical energy into mechanical energy.Pilot Light OrificeA metering device used to supply gas for the dual purpose ofigniting the main burner and heating the thermocouple.Pilot Safety Control ValveA gas control valve which is held open by electrical powersupplied by a pilot generator and which closes automaticallyto shut off the flow of gas to the main burner when the pilotflame is extinguished or becomes too small to light the mainburner.Pilot ShieldA formed sheet metal piece that fits around the pilotassembly to protect the the pilot flame against drafts.Pilot TubeFormed copper tube used to convey gas from the safetycontrol valve to the pilot light orifice. The tube is internally“tinned” when natural gas is used to resist the effects ofsulphur in the fuel.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 energy directlyinto electrical energy. Works in conjunction with theelectromagnet in the gas control valve thereby providing gassupply for the pilot light.ThermostatElectrical device used as an automatic on/off switch whichwill respond to changes in temperature in a certain area.Can be wired so contacts in the thermostat open or close ontemperature increase or decrease.Throttle ValveManually adjustable component used to increase ordecrease the flow of gas to the burner. The throttle valve islocated between the gas control valve and burner assembly.

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