3. Dryer Control Panel
Unload Switch
The UNLOAD switch turns the metering rolls and discharge auger ON or OFF, and selects the operation of the metering rolls.
•In the 2 Speed position, if the MOISTURE CONTROL switch is ON, and the drying mode switch is turned to continuous flow, the metering roll speed will alternate between the high speed metering roll potentiometer setting and the low speed metering roll potentiometer setting, depending on the control signal from the moisture control thermostat. The discharge auger will operate continuously.
•In the 1 Speed position, if the MOISTURE CONTROL switch is ON, and the drying mode switch is turned to continuous flow, the metering roll speed will operate at the high speed metering roll potentiometer setting or turn off depending on the control signal from the moisture control thermostat. The discharge auger will operate whenever the metering rolls are operating.
•In both the 1 Speed and the 2 Speed position, if the MOISTURE CONTROL switch is OFF, and the drying mode switch is turned to continuous flow, the metering roll speed can be manually controlled by adjusting the high speed metering roll potentiometer. The discharge auger will operate continuously.
•If the drying mode switch is turned to staged batch, the UNLOAD switch should be set to the 1 Speed position. The discharge auger and metering rolls will only operate during the unload cycle of the staged batch operation, and the speed of the metering rolls is adjusted using the high speed metering roll potentiometer.
NOTE: If the unload auxiliary motor overload relay is being utilized in the dryer control panel, the same switch will also control the operation of the auxiliary equipment.
Low Speed Metering Roll Potentiometer
Use this to adjust the low speed of the metering roll when the 2 Speed automatic moisture control feature of the dryer is in use.
High Speed Metering Roll Potentiometer
Use this to:
•Set the high speed of the metering roll when the 2 Speed automatic moisture control feature of the dryer is utilized.
•Set the speed of the metering rolls when the 1 Speed automatic moisture control feature of the dryer is utilized.
•Set the speed of the metering rolls during continuous flow operation when the moisture control is not used.
•Set the rate of grain discharge from the dryer during the unload cycle of staged batch dryer operation.
Dryer Power Start Switch
This switch starts and operates the dryer based on switch settings. If other switch settings are in the OFF position, individual dryer components can be operated by turning the drying mode switch to continuous flow, pressing the dryer power start button and then turning on the desired dryer component.
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