Grain Systems PNEG-591 - Manual (Page 23)

23
Series 2000 Downwind Heater
Programming Set Points
Multiple heaters may be done at any heater control console. The informa-
tion programmed is automatically transmitted to all other heaters when the
programming is complete.
Hi Limit Set Point--The upper left cursor is flashing indicating the
mode. If the plenum temperature increases above this point, the flame is
shut off--"OFF-CYCLE" is displayed on screen.
Cycle Set Point--The upper 2nd from left cursor is flashing indicating
the mode. If the dryer is not a hi-lo dryer, this function is skipped. If
the plenum temperature increases above this point, the flame reduces to
"LO-FLAME".
Humidity Set Point--The upper 2nd from right cursor is flashing indi-
cating the mode. If the humidity is above this point the dryer operates
Depressing the "PROGRAM"
switch (lower left) causes the dis-
play to enter the program mode.
Each item below is programmed by
using the up and down arrow
switches. Holding down these up
and down arrow switches for about
2 seconds will cause the numbers to
increase/decrease rapidly until the
switch is released. When finished
programming an item, depressing
the "PROGRAM" switch again will
cause the new setting to be entered
into memory, and the display will
advance to the next function to be
programmed.
Programming may be done at
anytime (unless an error condition
exists) even while the dryer is in
operation.
Programming a system with
The limits are continuously
checked during the drying operation.
A limit switch open or any other er-
ror condition will cause the dryer to
shutdown, and the fan will be shut-
down. If a limit opens, or an er-
ror condition occurs during dry-
ing, the control will lockup in the
error display mode. Power must
be shut off and back on to the con-
trol to clear the error condition--
even if the error or limit that
caused the shutdown has been
corrected. This is to keep the dis-
play locked up with the condition
that caused the error, allowing the
operator time to determine what
caused the shutdown.
normally--flame on and off at the high limit and cycle set points. If the
humidity is below this point the dryer goes into the "OFF-CYCLE" mode.
Temperature Differential--The upper right cursor is flashing indicating
the mode. If the flame shuts off because the temperature is greater than the
high limit set point, the temperature must fall below the (Set Point minus
Temperature Differential) for the flame to come back on.
Programming the high-limit set point.
OPERATING PROCEDURE