The plenum setpoint and burner differential settings establish the temperature range inside the plenum.
You can set this range before the initial run and adjust if the grain temperature rises or drops excessively.

To set the plenum temperature range:

1. From the menu pane, click Dry→Plenum Setpoints.

NOTE: The plenum setpoint window that opens is dependent on the chosen drying mode. For exam-

ple, the second group of plenum setpoints is only displayed when a dual-setpoint control
scheme is selected within the staged batch drying mode.

2. Set the following parameter:

Plenum Setpoints — The desired temperature inside the plenum. In a multi fan and heater configu-
ration, plenum 1 always refers to the one that is closest to ground level.

NOTE: To access and enter plenum setpoints from the main menu quickly, click the plenum’s respec-

tive setpoint shortcut that is located in the settings pane.

3. Close the active window.

4. From the taskbar, click System→Dry (Advanced)→Burner Differential.

5. Set the following parameter:

Burner Differential — The offset from the target temperature that establishes the minimum and max-
imum plenum setpoint limits. When these limits are attained, the burner’s reaction is dependent on
the chosen burner mode.

Let’s assume that you enter a plenum setpoint of 210°F, a burner differential value of +/- 1°F, and choose
either the high/low or on/off burner operating mode. When the plenum’s actual temperature reaches 211°F,
the burner switches to either low fire (high/low mode) or shuts off (on/off mode). In both modes, the burner
switches back to high fire when the plenum temperature drops to 209°F.
After You Finish

Select a burner mode to help you establish and maintain a uniform plenum temperature (see

The Burner

Modes, page 79

PNEG-1851 Vision N2