Air Conditioning and Refrigeration Repair

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• Introduction1 Basic Electricity for RefrigerationElectricityOhm’s Law2 Test MetersChecking Ac VoltageChecking Resistance with the OhmmeterChecking Current with Clamp-On AmmeterChecking Current with In-Line Dc AmmeterUnits and Prefixes for Electrical MeasurementEvaluation of Electrical Components3 CompressorsHermetic CompressorSemi-Hermetic CompressorElectrical Connecting TerminalsCompressor TestingRefrigeration Valves (Compressor Reed Valves)4 Capacitors and FusesTypes of Motor CapacitorsChecking a CapacitorHolding-A-Charge TestFusesTesting Fuses5 Relays and ContactorsCurrent RelayPotential RelayHot-Wire RelayBimetal ContactsRelays and Contactors6 TransformersWattage RatingDistance Between Transformer and ControlStep-up TransformersTesting Transformers7 Circuit BreakersNon-TripQuick-TripTime-Delay Breaker (Slow Trip)Testing8 Motor StartersAuxiliary Switches9 Safety ControlsElectrical Safety ControlsMechanical Protection Controls10 Evaporator SectionHeat Strips(Air Handler)11 ThermostatsWiringSub-Base Terminal IdentificationDifferentialLeveling Sub-Base for Mercury Switch ThermostatsPneumaticAccustats12 Optional Components in Condensing UnitCrankcase HeaterReceiverAccumulatorHot Gas MufflersDriers-DehydratorsReplaceable-Core, Shell-Type Filter DrierStrainersSight GlassesSolenoid Valves13 Wiring Schematics14 Properties of RefrigerantsRefrigerantsColor CodingTemperatures15 Basic Mechanical Refrigeration SystemCompressorCondenser (Air-Cooled)Condenser (Water-Cooled)Water SourceEvaporator-DXMetering Devices16 Humidity Control17 Basic Air Conditioning Operation18 Optional ControlsFire StatSmoke DetectorSail Switch or Pressure SwitchOil Pressure Failure Control.Solenoid Valve19 PipingCopperPVCGalvanized20 Soldering50-50 Solder95-5 SolderStay BriteSil-FosSilver Solder21 Flare and Compression Fittings22 Filter Driers and Air FiltrationAir Filtration23 Fan SystemsRules for Propeller Fan RotationIncreasing Cfm by Increasing Motor SpeedThrottling FansThrottling Water PumpsFan VibrationDirection of Discharge Air and Fan Rotation24 Pulleys and BeltsBelt ReplacementFan SpeedsSheave Alignment25 Leak TestingCondensing UnitEvaporator UnitIsolation TestVacuum Pump26 Charging the SystemAir Conditioning Charging TablesService Manifold and GaugesSight GlassesCharging CylinderService Valves27 Field Repairs of Semi-Hermetic Compressors28 Heat Pumps29 Window Units30 Preventive MaintenanceCondensing UnitCompressorEvaporatorThermostat31 TroubleshootingCondensing Unit and Evaporator Not OperatingEvaporator Section Blowing Warm AirCondenser Unit and Evaporator Section OperatingNot Cooling Enough, Ice on Suction LineCondensing Unit Operating, Evaporation Operating, Insufficient CoolingBlown Fuse or Tripped Circuit BreakerUnit Stops Operation, Operating When Technician ArrivesCleanup of Compressor Burn-Out.Noise ComplaintOdors32 Automotive Air Conditioning33 Heat Reclaim34 RefrigerationRemote SystemsReach-In CoolersDomestic Refrigerator35 ToolsMultimeterClamp-On AmmeterManifold and GaugesOxygen-Acetylene Soldering OutfitLeak DetectorElectric DrillElectric ScrewdriverSoldering (Iron-Gun)Adjustable WrenchesNut DriversStandard ScrewdriversPhillips ScrewdriversAllen WrenchesThermometersPliersHammerSocket WrenchesTubing CuttersFlaring ToolSwaging ToolInspection MirrorService-Valve WrenchCrimping Tool36 Geothermodynamics37 Solar EnergyCollectorCirculating PumpHot Water Sensing ThermostatThermo-BankHot Air Solar CollectorsIndex