5 drying hopper setup – AEC AP Series Large Dehumidifying Dryer User Manual

Page 41

Large Dehumidifying Dryers

Controls

4-5 Drying Hopper Setup

Use the drying hopper setup display to change the following drying hopper specific
parameters.

•

Start or stop the drying hoppers Process supply air temperature control loop auto-
tune.

•

Select whether a drying hopper low level alarm will

o Never alarm (Disabled)
o Only arm when the dryer is running (Dryer)

•

Select whether the drying hopper is running at

o FULL capacity – low level probe 1 is used for low level alarm.
o ½ capacity – low level probe 2 is used for low level alarm.

•

Set an offset value to the dryers supply and return air temperature readings.

•

Set the high and low Process supply air temperature deviation alarm values.

•

Change the name of the drying hopper.

•

Access the Material Miser and air balance setup screen.

Use the “Material Miser and Air Balance Setup Screen” display to control the various
available combinations of Material Miser action and optional air damper control.

Material Miser

o Temperature Activated

Material Miser mode is active when the difference between the supply and return

temperature has been less than the “Set Back Temperature” value for the “Set
back Delay” time.

• Set Back Only

o When activated, Material Miser will automatically change the

drying hoppers Process supply air temperature set point to the
value set in “Set Back Setpoint.”

• Air damper only

o When activated, Material Miser will automatically close the

optional air damper valve.

• Set Back with Air Damper

o In addition to temperature setback, close the optional air damper

valve.

o Convey activated

Material Miser mode is active when the drying hopper senses that it has not

received new material within the “Demand Watchdog” time.