AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 43)

6 Startup, Shutdown, and Operation
6-1 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!
6-2 Startup
1. Close the slidegate at the bottom of the drying hopper.
2. On three-phase models, make sure that the blower turns in the right direction before you
fill the hopper.
3. Fill the drying hopper with material.
4. Turn on (energize) the disconnect switch in your power drop, then turn on the one on the
dryer.
5. Turn the on/off switch to ON .
The blower starts and the proper control panel indicators light.
6. If your dryer has a water-cooled aftercooler, make sure that sufficient cooling water
flows properly through the coil, and you have bled any trapped air from the system. Make
sure that the aftercooler has the proper supply water temperature.
7. Set the process set point on the temperature controller.
8. 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.
Page 42 WDMR and WDFR Series Dehumidifying Dryers