6. Dryer Start-Up
PNEG-552 100 Series Dryer 33
100 Series Continuous Flow Metering Roll Settings
Adjusting the Moisture Control
1. 5° on the moisture control will change the output moisture by about 1%. Example: With 100° set,
the result is 16% corn but 17% corn is desired. Reduce the moisture control setpoint temperature
by 5° to 95°. This should change the moisture out to about 17%. If you want the corn to come out
dryer, raise the temperature on the moisture control setpoint.
2. Four (4) sensors are averaged together for sensing moisture control temperature, one (1) on each
side of the dryer in the front, and one (1) on each side of the dryer in the back. They are located
about 1/3 of the way up the grain column from the bottom, and in from the side about 4''.
3. Grain temperatures can be monitored by pressing the mode select button.
4. The moisture control should stay on HIGH about 50% to 90% of the time. There is a broad range
that will work. It should switch from low to high and back again to maintain the desired moisture. A
control that does not switch will not maintain an evenly dried grain moisture when the incoming wet
grain moisture varies.
5. If the metering roll switches to LOW and stays there for long periods of time, both the High
and Low Speed Potentiometers should be slowed down 2% (20 points) and monitored for
further adjustment.
6. If the metering roll switches to HIGH and stays on HIGH more then 90% of the time, increase the
speed on both Potentiometers 2% (20 points) and monitor for further adjustment.
7. When adjusting the METER ROLL SPEEDS it is better not to change the speed more than 20 points
(2%) at a time.
8. Anytime a change is made, wait the approximate dry time for that moisture grain from the Chart
above before checking the grain moisture level and making another change if necessary.
Initial
Moisture (%) Moisture
Removed (pts.)
Full Heat
Approximate
Dry Time (min.) 1 Speed 2 Speed
Low 2 Speed
High
17 216 625 317 875
18 3 21 476 270 775
19 426 385 241 675
20 5 31.5 317 213 575
21 637 270 196 476
22 7 41.5 241 185 385
23 847 213 172 317
24 9 51 196 161 270
25 10 54 185 150 241
26 11 58 172 140 213
27 12 62 161 132 196
28 13 66.5 150 123 185
29 14 71.5 140 116 172
30 15 76 132 110 161
31 16 81 123 104 150
32 17 86 116 100 140
33 18 91 110 096 132
34 19 96 104 087 123
35 20 100 100 082 11 6
These are approximate starting points.