Grain Systems PNEG-1458 - Manual (Page 41)

8. Dryer Operation
PNEG-1458 T-Series Tower Dryer 41
Continuous Flow Drying Mode Using Advanced Moisture Control
Full Heat Continuous Flow Operation
This section begins with Step 7 and it is assumed that Step 1 through Step 6 in the start-up procedure
described on Page 40 have been completed.
7. Touch the Setup button at the bottom of the Dryer Operation screen. Once the Hardware Parameter
screen is displayed, touch the Drying Mode button. NOTE: Tower Dryers are always operated in the
continuous flow mode. Press the Accept button and return to the Hardware Parameter screen.
8. Touch the M/C Setup button. When the Moisture Control Selection window appears select the
MOISTURE then VARIABLE moisture control option. Then set the maximum grain temperature
under the Safety Parameters group. Now touch the Setup button then the Unload Parameters button.
When the Unload Parameters window appears, set the % (percent) MAXIMUM Unloading Rate to a
value slightly lower than the maximum unload rate of the unloading equipment. (NOTE: This
percentage will need to be experimentally found by manually operating the dryer unload at various
unload rates to determine the maximum unload rate which the equipment can handle.) Set the
MINIMUM unloading rate at 10%. Once these values have been determined, touch the Accept/Exit
button. In this screen, you also have the option of automatically adjusting the drying temperature
downward if the automatic moisture control continuously calls for an unload rate which is higher than
the maximum unload rate. To select this option, turn the Plenum Temperature Manager to the “ON”
position. (
See Page 28 under the Setup screen.) You have the option of controlling the frequency at
which the plenum temperature will be adjusted (time between possible steps) and the size of each
temperature change for each step (size of temperature steps). These settings will be a trial and error
adjustment that will be made based on the site of the unload equipment. Initially, the step time should
be “15 MINUTE” and the size of the temperature step should be “AUTO”. If drying conditions change
after the plenum temperature manager has lowered the drying temperature, the plenum temperature
will also re-increase the drying temperature.
Figure 8D
Moisture button
Maximum grain
temperature button
Variable button