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10 CFM Compressed Air Dryer Chapter 4: Operation 20 of 30
4-3 Start-up
Use the following procedure to start the dryer:
1. Turn on the disconnect switch in the power drop, close the slide gate at the bottom of
the drying hopper.
2. Close the slide gate at the bottom of the drying hopper.
3. Fill the drying hopper with material.
4. Turn the ON/OFF switch to “ON” to energize the display panel and turn on the
solenoid and the heater.
5. Use the Up Arrow and Down Arrow buttons to set the process set point on the
temperature controller.
Note: Consult the resin manufacturer for the recommended drying temperature.
6. Press the Mode button one time to make sure the controller’s Run/Stop parameter is
set to “RUN.”
7. Use the Up Arrow or Down Arrow button to change the value to “RUN.”
8. Press the Mode button to begin operation.
9. 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, maintain the
material level in the hopper at the midpoint of the air trap assembly.
4-4 Shut-down
Use the following procedure to shut down the dryer:
1. When processing is complete, close the hopper slide gate and shut down any in-line
companion equipment.
2. Lower the process temperature controller set point to a value of 100º Fahrenheit.
3. Allow at least one minute of run time so that the compressed air continues to flow
through the unit and cool down the heating components.
4. Turn the On/Off switch to “Off.”
5. If needed, empty the drying hopper.
6. For maintenance or a long-term shutdown, open the electrical disconnects at the dryer
and at the power drop.