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NOTE: If the Aftercooler is used as a plasticizer trap, the water temperature of 50°F or lower
is recommended.
3-5 Initial Start-up
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.
; Verify that the thermocouple is properly installed at the hopper inlet.
Starting Up the Dryer
1. Turn on (energize) the disconnect switch in your power drop, then turn on the
disconnect switch on the dryer.
2. Turn the system
ON/OFF switch to ON to energize the display panel.
3. Check the display for the proper temperature scale (ºF or ºC).
4. Close the slide gate at the bottom of the drying hopper.
Make sure that the blowers turn in the right direction.
5. Fill the drying hopper with material.
6. Press the
START button on the Touch Screen to start the dryer.
The process blower starts.
7. 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.
8. Set the process set point on the touch screen.
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.
Auto-Tuning the Dryer (Requires Supervisory Password)
From the “Dryer Status” screen, press “D-Menu” and select Auto Tune to gain access to this
screen.
Portable Drying/Conveying Systems Chapter 3: Installation 19 of 63