Hoefer GD2000 - Manual (Page 24)

•
p16
Options for manual operations
To apply a vacuum without heat. Set the
Temperature to 0:FF, then set the timer. Ten
seconds after you set the time, the vacuum
starts without heat. The vacuum stops when the
Elapsed Time equals the Set Time.
To preheat the dryer. Set the Temperature and
set the Time. After ten seconds, the vacuum
starts. Press the Vacuum key to turn off the
vacuum and leave the heat on. To restart the
vacuum, press the Vacuum key again.
Note: When you manually preheat
the dryer, be sure the set time
includes the time needed to
prepare the gel stack as well as
the time needed to dry the gel.