Grain Systems PNEG-743 - Manual (Page 7)

8
Series 2000 Top Dry Heater Control
OPERATING PROCEDURE
from right cursor flashing).
When the grain temperature
gets to this point (or dry timer
times down), the heater control
advances to the cool cycle. If
Depressing the program dry and
cool times switch will cause the
lower left cursor to begin flash-
ing, indicating a new dry time
may be entered. This dry time is
the length of time the heater will
run in the dry mode (burners con-
trolling to the temperature set in
the above program mode). This
time can be set from 1.0 hours to
20.0 hours. Depressing the pro-
gram dry and cool times switch
again will cause the lower 2nd
from left cursor to begin flashing.
Programming Top Dry-
Dry And Cool Timers
Fan delay time is the amount of time in seconds between the fans
starting. Power up with the "Program Dry/Cool Timers" and " Pro-
gram Temperatures" switches depressed to adjust the programmable
Programming Top Dry Fan Delay For Slaves
to adjust the programmable delay for Top Dry fans.
The dry time and cool time "carrots" on the display both flash
indicating it is in the program delay time mode.
Note: This can only be done on the master.
continue to run cool. This cool time can be set from 0.0 hours to 20.0
hours. If set to 0.0 hours, there is no cool period. Depressing the
program dry and cool times switch again will cause the control to exit
the program mode.
Setting the dry time on the control box.
This is the cool period. When the burners get shut down due to the
dry timer timing out, or grain reaching temperature set point, the fan
w
i l l
no cool time is pro-
grammed in, the
dryer shuts down
when the grain gets
to that temperature.
Depressing the
program switch
again will cause the
display to advance
to setting the dif-
ferential tempera-
ture setting (upper
right cursor flash-
ing). This differen-
tial is basically
hysteresis. When
main or cycle solenoids shut off due to exceeding the temperature
set point, that burner will not come on again until the temperature
falls below the set point minus temperature differential. Depress-
ing the program switch again will cause the control to exit the pro-
gram mode.