Table of Contents
I.INTRODUCTION
CHAPTERREVIEW
II.CONTROLSANDTHEIRFUNCTIONS
NeedforControls
ManualandAutomaticOperations
BasicElementsofAutomaticControls
EvolutionofAutomaticControls
CHAPTERREVIEW
III.MANUALCONTROLOFGASAPPLIANCES
ElectricSwitches
Orifices
ManualAdjustmentofControllers
CHAPTERREVIEW
IV.PHYSICALPRINCIPLESUSEDINCONTROLS
ThermalExpansionofGases,LiquidsandMetals
ElectricalHeatingofaResistiveElement
ChangeofElectricalResistancewithTemperature
ThermoelectricEffect
ElectromagnetismandSolenoids
ChangeinShapeofCoilsfromInternalPressureChanges
CHAPTERREVIEW
V.SENSINGDEVICES
TemperatureResponsiveDevices
Bimetals
UnevenlyHeatedShapes
RodandTubeSensors
HydraulicandPneumaticBulbs
ElectricalResistanceCoils,RTD'sandThermistors
FusibleLinks
PressureResponsiveDevices
MetallicBellowsandDiaphragmSensors
CoiledMetallicTubing
FlowSensingDevices
LiquidLevelSensors
FloatType
ElectricalContactType
RotationSensors
FlameSensors
Thermocouple
Bimetal
HydraulicorMercuryVaporizationType
OpticalSystems
FlameRectification
CHAPTERREVIEW
VI.ACTUATIONOFCONTROLS
Self-PoweredDevices
UseofMotionDuetoExpansionorWarping
UseofGeneratedPressure
UseofGeneratedElectricalCurrent
Externally-PoweredDevices
CHAPTERREVIEW
VII.AUTOMATICCONTROLS
Thermostats
HydraulicThermostats
RodandTubeThermostats
BimetalThermostats
Heating/CoolingThermostats
AutomaticOffsetThermostats
AutomaticGasValves
DiaphragmAutomaticValves
SolenoidValves
HeatMotorAutomaticValves
Hot-WireValves
MotorizedValves
LimitControls
ThermostaticLimitControls
LowLiquidLevelShutoffControls
GasPressureRegulators
ConventionalGasPressureRegulatorOperation
ServoPressureRegulators
Two-StageRegulators
TypesofGasPressureRegulators
CapacitiesofGasPressureRegulators
LocationandPosition
CombinationControls
Accessories
AutomaticVentDampers
Motors
FansorBlowers
Pumps
Transformers
PilotGasFilters
MiscellaneousControls
TimeSwitches
DraftControls
CHAPTERREVIEW
VIII.IGNITIONSYSTEMS
AutomaticPilots
PilotBurners
SafetyShutoffbyAutomaticPilots
MeansofIgnition
Two-StageAutomaticPilotSystems
OxygenDepletionSensing(ODS)Pilots
PilotRelightSystems
IntermittentIgnitionDevices
DirectSparkIgnition
HotSurfaceIgnition
CHAPTERREVIEW
IX.APPLICATIONTOAPPLIANCES
Ranges
Top-BurnerControls
OvenandBroilerBurnerControls
Self-CleaningOvenControls
RangesFeaturesandAccessories
AutomaticWaterHeaters
AutomaticStorageHeaters
AutomaticCirculatingTankTypeHeaters
InstantaneousWaterHeaters
SwimmingPoolHeaters
CentralHeatingSystems
SteamHeating
HotWater(Hydronic)Heating
WarmAirHeating
PotableWater-SourceSpaceHeatingSystems
RoomThermostats
HumidityControls
ConversionBurners
WiringConsiderations
In-SpaceHeatingAppliances
OutdoorHeating
ClothesDryers
IgnitionSystems
DrynessSensing
Timers
TemperatureLimitControls
Two-LevelDryerBurners
AirFlowControl
MotorControl
Refrigeration
RefrigeratorBurners
PressureRegulators
Thermostats
DefrostSystems
Incinerators
IgnitionofRefuse
Controls
AirConditioners
Ignition
CoolingThermostats
PilotandMainBurnerValves
Venting
SailSwitchforFlueGas
Limits
SpecialConsiderations
CHAPTERREVIEW
X.MAINTENANCEANDREPAIROFCONTROLS
PreventiveMaintenance
SummaryComments
CHAPTERREVIEW
REFERENCESSOURCES
GLOSSARY
ANSWERSTOCHAPTERSREVIEW Abstract
Includes description of gas appliance controls and their functions. Includes various physical principles and sensing devices used in controls. Also includes discussion of automatic controls, ignition systems and application of controls to appliances. Provides assistance to vocational-technical schools, appliance service and repairmen and utility employees.
