Manual was complete and available promptly, since I had lost my original manual. Very good response.
Text excerpt from page 12 (click to view)
AUTOMATIC TIMER CONTROL
The automatic timer can be used with the main oven only.
TO SWITCH THE MAIN OVEN ON AND OFF AUTOMATICALLY
1. Ensure the clock is showing the correct time of day. 2. Place food in the main oven.
3. Set the length of time you want the food to cook for by pressing and releasing the button and then pressing the button until the correct cooking time is displayed. This must be completed within 5 seconds of pressing the button. The maximum cooking time is 23 hours 59 minutes. The Cookpot and Auto symbols will show in the display. Our diagram shows the cooking time set for 2 hours 30 minutes. After a few seconds the time of day shows in the display.
4. To set the time you want the food to be cooked by, press and release the button. This will show you the earliest possible stop time. If this is different to the time you want the food to be cooked by, press the button within 5 seconds until the correct stop time shows in the display. Our diagram shows the food is to be cooked by 18.00 (6pm). After a few seconds the time of day shows in the display and the Cookpot symbol goes out. The 'Stop' time must not be more than 23 hours 59 minutes from the time of day. For example, if the time of day is 09.00 hours (9.00am) the latest 'Stop' time will be 08.59 (8.59am) the next day.