Canon MF244dw User Manual page 313

Auto Shutdown Time
Set a timer to automatically shut down the machine after the specified period of idle time has elapsed since the
machine entered the sleep mode.
0 (Auto Shutdown is disabled.)
1 to 4 to 8 (hr.)
Setting Menu List
<Timer Settings>
Setting Auto Shutdown Time(P. 61)
<Auto Offline Time>
307
Set the time period