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Large Dehumidifying Dryers Operation 52
Chapter 5: Operation
5-1 Start-up
There are two possible methods of starting the dryer system: manually, by pressing the Start
button on the Dryer Status screens, and automatically through use of the Auto Start Timer
built into the dryer control system.
Before operating the dryer, make sure all electrical connections are tight and that the
blowers rotate in the right direction.
Use the following procedure to start the dryer manually:
1. Close the slide gate at the bottom of the drying hopper.
2. Turn on the disconnect switch in your power drop, then turn on the one on the dryer.
3. Turn the system ON/OFF switch to ON to energize the display panel.
4. On the Dryer Status screen, press the START button to start the dryer. The process
blower starts.
5. If the dryer has an aftercooler, make sure there is proper flow of cooling water
through the coil and bleed any trapped air from the system.
6. On the Dryer Status screen, press the SETPOINT button, and use the keypad to enter
the process set point value. Press the ENTER button to save the value.
7. After the proper pre-drying time for the initial hopper fill has elapsed, fully open the
drying hopper slide gate.
Note: To allow proper residence time during continuous processing, the material level in
the hopper should be maintained at a full level.