B&C Technologies EDG Dryer Control (DE, DP, DI Series) - Manual (Page 10)

List of phases carried out during
program execution
When the user has selected the desired program,
START must be pressed to begin the program. In
order for this to occur, the heat intake fan must
not be running (the EDG must detect the sail
switch transitioning from open to closed).
Once the program starts, a set of operations is
carried out periodically, regardless of the program
phase currently under way. These operations are
as follows :
When START is pressed, the first phase to be
carried out is the program starting phase.
This consists in cleaning the blower by piloting a
jet of compressed air for 3 seconds (optional
feature, not present on all machines).
In addition, gas control unit reset is carried out,
and the “Dryer Busy” signal turns on. This signal
will remain active until the program is completed
or interrupted, even during pauses due to
opening of the door or single stop.
When this phase ends, the flow of compressed air
is cut off and the gas control unit reset signal is
turned off. At this point the fan turns on and the
actual drying phase begins. Up until now the
display shows the name of the selected program.
Heat adjustment is carried out during this phase
so that the temperature inside the basket may be
kept at the set value, with a 3 °C hysteresis.
The display showing information about the
program under way, in other words actual
temperature and residual time, is updated every
6 seconds.
In addition, basket movement is started. This, if
the machine is equipped with reversing,
determines an alternate basket movement
according to the times set in the program. In case
the machine is not equipped with reversing, the
basket is connected to the fan motor which gives
it its motion.
The machine moves on to the next phase,
cooling down, when the residual time expires.
During the cooling down phase the display
shows the message “COOL DOWN”.
This phase differs from the drying phase mainly
because heat adjustment now ends. Cool down
is completed once the relevant temperature set
in low level programming is reached, or when
the relevant time expires (also set in low level
programming), depending on which of the two
conditions occurs first.
At the end of the cool down phase the dryer
stops, and the “Dryer Busy” signal turns off.
Depending on the setting of parameter
“ANTICREASE SN” in high level programming,
the end of cooling down determines :
If ANTICREASE SN was set to YES, the
machine moves on to the pause phase
which precedes the anti-crease cycle.
If ANTICREASE SN was set at NO, the
program ends.
In both cases the display indicates “END” and
the buzzer goes off for a time set in the
program.
The anti-crease phase is preceded by a 2-
minute pause interval, during which the
machine remains inactive.
At the end of this pause the anti-crease cycle
begins.
This cycle can last for a maximum of 99
minutes, and it stops every time the door is
opened. During this phase the basket moves
periodically (with alternate motion if reversal is
enabled). In addition, the buzzer goes off every
time motion starts.
Once the anti-crease cycle is finished the
program is done.
Every time a program is interrupted (door
opened or STOP push-button pressed), the
subsequent restart (by pressing ENTER) no
longer begins from the starting phase but rather
from the drying one.
Restart after a program interruption
Details
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