* The compressor is protected against high/low pressure and temperatures by a factory-installed high/ low pressure switch and a temperature sensor which protects the compressor if undesirable operating conditions occur. * * The factory-installed discharge muffler helps insure quiet and stable operation. * * The low-pressure service valve provides easy access for service and installation * * The factory-installed accumulator protects the compressor against liquid slugging. * * Crankcase heater that can protect the compressor from low ambient temperatures or refrigerant migration.