My new sauna came with a special wall receptacle to plug it into. is there anything else I need to do besides replace one of my wall outlets with this receptacle?
Yes. The ASE-3 and CSE-3 require a 20-amp line. Besides using the 20-amp receptacle provided, you must make sure that the circuit breaker for this line is rated at least 20-amps, and that the wiring from the breaker box to this outlet is rated for 20-amps (12-guage or heavier).