8. Pre-Season Checks
PNEG-696
TopDry Series 2000 Autoflow
27
Fill System
Prepare the wet storage tank to deliver grain to the dryer. Make sure all personnel are away from any
machinery that is controlled by the Autoflow. Place the Load Auger switch in the “AUTO” position. The fill
system(s) should begin to load grain from the wet supply tank to the dryer. When the display on the
Autoflow control box reads “GRAIN LOW LEVEL YES” close the valve that supplies the fill system(s) with
wet grain from the wet supply tank. After the fill system(s) have cleaned out place the Load Auger switch
in the “OFF” position.
Air Switch
Place the fan and heater service switches on the main drying fan(s) in the “OFF” position. Place the Fan
switch on the Autoflow control box in the “ON” position. Place the aeration Fan switch on the Autoflow
control box in the “ON” position. Go to the master fan and heater unit. Place the fan service switch in the
“ON” position. The master fan should start. In two (2) fan units, the slave fan should start after the fan
delay. In single fan units, the display on the master fan will read airflow after the master fan reaches half
speed. If the display reads airflow before the fan reaches half speed adjust the Air switch by turning it
clockwise. If the display does not read airflow adjust the Air switch by turning it counterclockwise.
In two (2) fan units, the display on the master fan should read airflow after the slave fan reaches half
speed. If the display reads airflow before the fan reaches half speed adjust the Air switch by turning it
clockwise. If the display does not read airflow adjust the Air switch by turning it counterclockwise.
Burner Test Fire
Place the Heater switch on the Autoflow control box in the “ON” position. Start the main drying fan(s) if
they are not already running. Make sure the fuel supply is ON. The burner should ignite after a short purge
delay. Gas pressure should be shown on the gauge. Adjust the high-fire gas pressure by turning the
regulator in and out on LP units; or, by opening and closing the main ball valve on natural gas units. The
high-fire pressure should be approximately 6-15 lbs. For LP units and 6-10 lbs. For natural gas units. While
the heater is in low-fire adjust the low-fire gas pressure by opening or closing the ball valve located on top
of the pipe train. The low-fire gas pressure should be approximately 2-6 lbs. For LP units and 1-3 lbs. For
natural gas units. If the burner remains in high-fire and does not cycle, increase the gas pressure in order
to reach the plenum cycle set point. If the burner remains in low-fire and does not cycle, slightly decrease
the gas pressure at the low-fire gas valve. Any time the high-fire gas pressure is adjusted the low-fire gas
pressure needs to be checked. The basic rule-of thumb for setting gas pressure is as follows: Make sure
that the temperature in the bin is increasing at a rapid rate when in high-fire and the temperature in the bin
is falling at a rapid rate while in low-fire.
Dryer Shut Down
To shut down the dryer, first close the fuel supply valve at the tank or the valve along the fuel supply line.
If the burner is operating, let the dryer run out of fuel. It should shut down due to loss of flame. Press the
dryer stop button to clear the error and turn OFF the main power disconnect at the entrance panel.
Emergency
In case of an emergency push, the Emergency Stop switch located on the side of the Autoflow control box
and the fill system control box. This will shut everything that is controlled by the dryer OFF immediately.