Sterlco SDAP 90-225 CFM Series Drying and Conveying Systems - Manual (Page 48)

Page 48 SDAP Series PD 2 to PD 4 Drying and Conveying Systems
5 Startup, Shutdown, and Operation
5-1 Pre-Startup Checks
1. Verify that the drying hopper is clean of rust-prohibitive oil or any foreign objects.
2. Verify that process and return hose connections are tight.
3. If your dryer has a water-cooled aftercooler, make sure that sufficient cooling water flows
properly through the coil and that you have bled any trapped air from the system. Make sure
that the aftercooler has the proper supply water temperature.
4. Check all companion equipment, such as the sight glass loader and drying hopper loader;
verify that all convey tubing is in place and the loading system is ready for operation.
5. Make sure quick disconnect cables are connected at the junction boxes on the sight glass
loader ( Machine Convey ) and the optional vacuum hopper ( Drying Hopper Convey ).
6. Verify that all electrical connection are tight and the unit is properly grounded.
7. With main power on, turn the dryer on until the process blower starts, verify blower rotation.
8. Turn on the machine loader and verify blower rotation; repeat for the drying hopper loader.
Important!
Clean the rust-preventing oil from inside the drying hopper.
Failure to clean the hopper fouls the desiccant and voids your warranty!
5-2 Startup
1. Turn on (energize) the disconnect switch in your power drop.
2. Turn the system ON/OFF switch to ON to energize the display panel.
3. Close the slidegate at the bottom of the drying hopper.
4. On three-phase models, make sure that the blowers turn in the right direction.
5. Fill the drying hopper with material. Use optional Drying Hopper Loader by turning on
the Drying Hopper Loader ON/OFF switch and setting the convey timer.
6. Turn the DRYER ON/SEQUENCE SHUTDOWN switch to ON to start the dryer.
7. The process blower will start.
8. Set the process set point on the temperature controller to the recommend drying
temperature provided by the resin manufacturer. Press and hold the Auto-Tune key on the
process temperature controller for two (2) seconds to initiate the auto-tune function.