Grain Systems PNEG-696 - Manual (Page 23)

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Series 2000 Autoflow Operation
Airswitch
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 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 airswitch by turning it clockwise. If the
display does not read airflow adjust the airswitch by
turning it counterclockwise. In two 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
airswitch by turning it clockwise. If the display does
not read airflow adjust the airswitch by turning it
counterclockwise.
Burner Test Fire
Place the heater switch on the Autoflow
control box in the “on” position. Start the main drying
PRE-SEASON CHECKS
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.
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 pipetrain. 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 setpoint. If the burner
remains in low fire and does not cycle, slightly de-
crease 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 Shutdown
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.