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1.1.1 HEAT/COOL MODE1.15 BATTERY CHARGING ALTERNATOR1.15.1Alternator OperationCAUTIONObserve proper polarity when installing battery,negative battery terminal must be grounded.Reverse polarity will destroy the rectifier diodesin alternator. As a precautionary measure,disconnect positive battery terminal whencharging battery in unit. Connecting charger inreverse will destroy the rectifier diodes inalternator.The alternator converts mechanical and magnetic energyto alternating current (A.C.) and voltage, by the rotationof an electromagnetic field (rotor) inside a three phasestator assembly. The alternating current and voltage ischanged to direct current and voltage, by passing A.C.energy through a three phase, full-wave rectifier system.Six silicon rectifier diodes are used.Yellow2Red4Yellow12Black31236341. Positive Output(B+)2. 12vdc Terminal (D+)3. Ground Terminal4. Excitation Input5. Suppression Capacitor6. Regulator, Brush Holder & BrushesFigure 1-24. Alternator and RegulatorP/N 30-00393-0051. D+ Emulation (Orange)2. #10-24 AC Terminal3. #10-24 Ground Screw4. 1/4-20 Positive Output CableFigure 1-25. Alternator and RegulatorP/N 30-00409-021.15.2Integral Voltage Regulator Operation(12 volts dc)The regulator is an all-electronic, transistorized device.No mechanical contacts or relays are used to perform thevoltage regulation of the alternator system. Theelectronic circuitry should never require adjustment andthesolidstateactiveelementsusedhaveprovedreliableenough to warrant a sealed unit. The system istemperature compensated to permit the ideal chargingrate at all temperatures.The regulator is an electronic switching device. It sensesthe system voltage level and switches the voltage appliedto the field in order to maintain proper system voltage.62-024611-34