Grain Systems PNEG-1851 - Manual (Page 67)

Chapter 8: The Staged Batch Drying Process
• Cooling timer of 18 minutes
• Unload timer of 10 minutes
• Plenum setpoints of 180°F (for ease of explanation, this example assumes that all plenums use the
same setpoint)
The drying phase starts when the load auger fill switch is activated. During this phase, all fans and heaters
are on so that the plenums can reach a temperature of 180°F. The heaters stop running when the grain
temperature reaches 90°F and 35 minutes have elapsed. Once the heaters are off, the fans continue run-
ning for another 18 minutes to cool the hot grain and then stop. Once the cooling phase ends, the unload
auger runs for 10 minutes to discharge the dry and cool grain into an external storage bin.
Figure 8-3 Sequence of operation for the time and temperature control scheme in staged batch
After You Finish
Now that the control scheme is set, complete the procedure on drying grain in staged batch mode (see
Drying Grain in Staged Batch, page 63 ).
Setting the Dual-Setpoint Time Scheme in Staged Batch
To expose the grain to two different drying temperatures, and switch from one temperature value to the
other once a predefined length of time elapses, you can use the dual-setpoint time control scheme when
running in staged batch.
Before You Begin
Make sure to select the Dual-Setpoint Time control scheme in the Moisture Control Mode window (see
Drying Grain in Staged Batch, page 63 for details).
To set the dual-setpoint time control scheme in staged batch:
1. If the dryer is running, press Stop on the control panel.
IMPORTANT: To stop the dryer when connected remotely, click Stop Dryer from the main menu.
However, once stopped, you cannot restart it remotely. The dryer can only be
restarted on-site.
2. From the menu pane, click Control→Moisture Control Settings.
3. Set the following parameters:
Drying Time 1 — The timer that must elapse to make the plenums use the second group of tempera-
ture setpoints.
Drying Time 2 — The timer that must elapse to end the drying phase.
Let’s assume that you enter the following values:
PNEG-1851 Vision N2 67