How do I set and cancel the timer on the unit?

Press the Timer button when the unit is powered on or off, then tap the UP or DOWN arrow to adjust the delay time in 0.5-hour increments, up to 10 hours. The setting confirms automatically after 5 seconds. To cancel, press and hold the Timer button for 2 seconds or press the power on/off button to turn off the unit directly. (Page 2)