How do I set the timer to turn the unit on or off automatically?

Press the TIMER button to initiate either ON or OFF sequence. Use the Temp up/down buttons to set the desired time (time increases by 30-minute increments up to 10 hours, then by 1-hour increments up to 24 hours). Point the remote at the unit and wait 1 second for activation. Cancel by setting the timer to 0.0 hours.