Grain Systems PNEG-526 - Manual (Page 17)

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Tower Dryer Operations & Service
Viewing Temperature/Moisture
History
Press the left and right arrows above the Tempera-
ture/Moisture History Chart to move backward and
forward through the graph.
Modifying the Bushel Per Hour Factor
The bushel per hour reading given by the PLC is a
calculated value based on metering device speed.
Due to variations in grain test weight and unload
system settings, the correction factor may need to
be calibrated so that the calculated and actual grain
flow rates agree. The bushel per hour factor is
normally set at 1.0. If, for example, the actual grain
flow rate is 5 percent higher than displayed, change
the bushel per hour factor to 1.05. To adjust the
correction factor, press the DRYER SETUP button,
then the BUSHEL COUNTER button. Press the
CORRECTION FACTOR box to adjust the value.
DRYER SHUTDOWN
Viewing Burner/Fuel Train Status
Press the Burner region in the Dryer View portion of
the LCD display to switch to the Fuel Train Status
screen. This screen displays the open/closed state of
all valves as well as the modulating valve control
value.
Viewing Grain Flow Status
Press the Unload region in the Dryer View portion
of the LCD display to switch to the Grain Flow
Status screen. This screen displays therunning status
of all controlled/interlocked equipment in the grain
flow path.
8. Inspect the inside of the dryer after opera-
tion to insure against the possibility of hot spots
or fires.
18. Shutdown dryer. The dryer will likely have to be
shutdown from time to time. The steps used to
shut it down will depend upon the duration of the
shutdown. If the dryer will be shutdown for 4
hours or less, follow the Short Shutdown proce-
dure. For longer shutdowns, such as overnight,
follow the Extended Shutdown procedure
Short Shutdowns - Less than 4 hours
For short shutdown periods, the dryer can be
shutdown by pushing the DRYER POWER
STOP button. To restart the dryer, push the
DRYER POWER START button. The PLC will
restart the dryer automatically based on selec-
tor switch settings.
Extended Shutdowns - 4 hours or more
1. Shut off the burner. Turn the BURNER se-
lector switch to the "OFF" position. All gas
valves will immediately close and the burner
will extinguish.
2. Cool down grain. PLC will continue to oper-
ate blowers to cool grain. To avoid overdried
grain upon restarting the dryer, continue to
move grain through the dryer during the cool-
ing off period.
3. Shut off unload equipment. Turn METER-
ING DEVICE and UNLOAD CONVEYOR
selector switches to "OFF" position.
4. Shut off blowers. Turn BLOWER selector
switch to "OFF" position.
5. Shut off control panel. Turn the CONTROL
POWER selector switch to the "OFF" posi-
tion.
6. Turn off main circuit breaker located on
the power panel.
7. Close main gas valve to the dryer.
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