Grain Systems PNEG-728 - Manual (Page 37)

37
Autoflow Operation
Cycle Setpoint-The cycle setpoint is the plenum
temperature that the fan and heater unit(s) will try
to maintain in the bin. The cycle setpoint is the
plenum temperature that the burner will cycle from
high-fire to low-fire. The cycle setpoint is set on
the hi-lo thermostat.
Cool Cycle-The cool cycle is the cycle that the
dryer enters into after the dry cycle is completed
on Autobatch units. The dryer will not enter into
the cool cycle until both the dryer timer has
reached zero and the grain temperature has reached
the grain temperature setpoint set on the moisture
control thermostat. If the moisture control thermo-
stat switch is placed in the “off” position the dryer
will ignore the grain temperature setpoint. During
the cool cycle the burner(s) are off an the main
drying fan(s) are running. When the cool timer
reaches zero the dryer enters the dump cycle.
There is not cool cycle on Autoflow units.
Cool Timer-The cool timer is located on the dryer
control panel below the display screen. On
Autobatch units it is a digital timer and controls
how long to cool the grain in the drying chamber
before dumping it into the storage chamber. There
is no cool timer on Autoflow units.
Dry Cycle-The dry cycle is the cycle that the dryer
is in when time is remaining on the dry timer or
when the dryer is in temperature hold. The dry
cycle start as soon as grain is above the drying
chamber low level rotary switch and the fan and
heater units are running.
Dry Timer-The dry timer is located on the dryer
control panel below the display screen. On
Autoflow units it is a digital timer and controls
how long to dry the grain in the drying chamber
before dumping it into the storage chamber. On
Autobatch units it controls how long to dry the
grain before cooling it in the cool cycle.
Dryer Control Panel-The dryer control panel is
located on the Autoflow Control Box. It con-
tains the start and stop switches and the selector
switches for the dryer. The dryer control panel
also contains the screen where the dyer status
and error messages are displayed.
Drying Chamber-The drying chamber is the
section of the dryer where the drying of grain
takes place. It is located in the upper chamber of
the dryer and is separated from the storage
chamber by a perforated drying floor. The fan
and heater unit(s) are located below the drying
floor and force air through the perforated floor to
dry the grain. Leveling bands in the drying
chamber keep the grain depth at 16”.
Drying Chamber High Level Rotary Switch-
The drying chamber high level rotary switch is
one of three rotary switches located in the drying
chamber. The drying chamber high level rotary
switch has a shaft of medium length when
compared to the other two drying chamber rotary
switches. The drying chamber high level rotary
switch tells the computer when the drying
chamber is full so the fill system(s) can be
stopped, and also tells the computer when grain
is needed in the drying chamber so the fill
system(s) can be started.
Drying Chamber Low Level Rotary Switch-
The drying chamber low level rotary switch is
one of three rotary switches located in the drying
chamber. The drying chamber low level rotary
switch has the longest shaft of the three drying
chamber rotary switches. The drying chamber
low level rotary switch tells the computer when
grain has covered the peak in the drying chamber
so the drying fan(s) can start, and warns the
computer if the drying chamber were to empty
unexpectedly.
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