Grain Systems PNEG-1851 - Manual (Page 60)

Chapter 7: The Continuous Flow Drying Process
NOTE: The units of measure selection (bushels or metric tons per hour) that is displayed in this field
is dependent on the chosen system of measurement (System→Preferences→Units of
Measure).
Grain setpoint — The grain’s target temperature value. This setpoint is the reference parameter that
is used to determine your dryer’s unload rate.
High Speed — The high setpoint for the metering roll speed. If the grain temperature rises 1°F (0.56°
C) above its setpoint, the metering rolls turn at this speed setting.
Low Speed — The low setpoint for the metering roll speed. If the grain temperature drops 1°F (0.56°
C) below the setpoint, the metering rolls turn at this speed setting.
Let’s assume that you enter a grain temperature setpoint of 105°F, a high speed setting of 550 Bph, and a
low speed setting of 300 Bph. If the grain temperature rises to 106°F, the metering rolls turn at 550 Bph. If
the grain temperature drops to 104°F, the metering roll speed decreases to 300 Bph.
After You Finish
Now that the control scheme is set, complete the procedure on drying grain in continuous flow mode (see
Drying Grain in Continuous Flow, page 57 ).
Setting the 5-Speed Temperature Scheme in Continuous Flow
To regulate the grain temperature within the dryer by automatically switching between five different meter-
ing roll speeds, you can select the 5-speed temperature scheme when the wet grain’s moisture varies
considerably across the grain spread.
Before You Begin
Make sure to select the 5-Speed Temperature control scheme in the Moisture Control Mode window (see
Drying Grain in Continuous Flow, page 57 for details).
What You Should Know
Considering that grain temperature is constantly monitored inside the drying chamber, the metering roll
speed quickly adjusts to sudden fluctuations in the grain’s temperature level. As a result, the 5-speed tem-
perature control scheme is suitable to use when operating in either full-heat or dry and cool.
To set the 5-speed temperature scheme in continuous flow:
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:
Unload Speeds Entered in — The units of measure (bushels or metric tons per hour, or metering
roll speed %) that the unload speed values are entered in.
NOTE: The units of measure selection (bushels or metric tons per hour) that is displayed in this field
is dependent on the chosen system of measurement (System→Preferences→Units of
Measure).
Reference Temperature — The grain’s target temperature value. This setpoint is the reference
parameter that is used to determine your dryer’s unload rate.
60 PNEG-1851 Vision N2