AD Series Dehumidifying Dryers Page 51
Startup, Shutdown, and Operation 7
7-1 Pre-Startup Checks
; Check the process and return hoses for tight connections.
; Check all companion equipment, such as the drying hopper;
verify that the loading system is ready for operation.
; Verify that all dryer electrical connections are tight.
Important!
Clean the rust-preventing oil from inside the drying hopper.
Failure to clean the hopper fouls the desiccant and voids your
warranty!
7-2 Starting Up the Dryer
Turn on (energize) the disconnect switch in your power drop, then
turn on the one on the dryer.
Turn the system ON/OFF switch to ON to energize the display
panel.
Close the slidegate at the bottom of the drying hopper.
Make sure that the blowers turn in the right direction.
Fill the drying hopper with material.
Turn the dryer ON switch to START to start the dryer.
The process blower starts.
If your dryer has a water-cooled aftercooler, make sure that
sufficient cooling water (3gpm at 85°F or lower) flows properly
through the coil and that you have bled any trapped air from the
system. Make sure the aftercooler has the proper supply water
temperature.
Set the process set point on the temperature controller.
After the proper pre-drying time for the initial hopper fill has
elapsed, fully open the drying hopper slide gate.
Turn on the machine convey ON/OFF switch to ON, and set the
convey timer for the proper conveying time.
Note: To allow proper residence time during
continuous processing, maintain the material
level in the hopper at the midpoint of the air
trap assembly.
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