I am taking a course and have an assignment. I am lost. I have to make a ladder diagram of a heat pump package air conditioning system. I have to include compressor running capacitor, compressor, safety thermostat, thermostat terminal board, transformer, thermostat, reversing valve, solenoid, outdoor, fan motor capacitor, outdoor fan motor, high pressure switch, low pressure switch, indoor fan motor, defrost thermostat, compressor, crankcase heater, circuit breaker, contactor, and indoor fan relay. How do I know which components are low/high voltage. Can anyone help me? Any websites with sample diagrams of this? Much appreciated!!!!!!!!!!!!!