Thoreson-McCosh Industrial Dryer TD-600

Is there a large percentage of broken pellets or dust?

Is there contamination from foreign matter?

Are most of the pellets discolored?

Regenerate a sample of desiccant in an oven at 600°F / 316°C for about two hours.

Place the desiccant into an air tight jar and allow it to cool down to room temperature for a minimum of 12 hours.

Pour 30ml of water into a small glass and record the temperature using a mercury thermometer.

Read instructions completely before attempting to remove the beds.

Set key switch to 'Adjust Setpoints'

Follow the procedure in Section 8.2 'Forcing a Bed Index'

Remove the 4CR (bed shift relay) from its socket

Place a 1” block inside of the upper and lower air cylinders

Remove the compressed air from the unit

Ensure bed seals are far enough away from the beds to slide them out

Ensure the unit is powered off before starting the check.

Verify that the Blower Rotation Alarm is installed on the unit.

Is the Blower Rotation Alarm activated?

Is the alarm light on and displaying a message on the digital readout?

Manual Rotation Check (if no alarm)

Remove the side panel to access the process blower motor.

Is the process blower motor rotating clockwise?

Check that all components are in place

Enter the amp draw of blower motors

Refer to wiring diagram, insert, and individual motor nameplate for specifications

Ensure the unit is powered off before starting the procedure.

Verify that the Blower Rotation Alarm is present on the unit.

Blower Motor Rotation Verification

Is the Blower Rotation Alarm activated?

Is the alarm light on and message displayed on the digital readout?

Manual Rotation Check (if no alarm present)

Remove the side panel of the dryer.

Is the process blower motor rotating clockwise?