Thoreson-McCosh Industrial Dryer TD-480

Check that all components are in place

Enter the amp draw of blower motors

Refer to wiring diagram, insert, and individual motor nameplate for amp draw details

Ensure the oven is set to 600°F / 316°C.

Prepare an air tight jar for cooling the desiccant.

Regenerate the desiccant in the oven for 2 hours.

Place the desiccant into an air tight jar.

Allow the desiccant to cool down to room temperature for a minimum of 12 hours.

Pour 30ml of water into a small glass.

Ensure the unit is powered off before starting the procedure.

Is the Blower Rotation Alarm included in the dryer?

Check if the Blower Rotation Alarm activates the alarm light and displays a message on the digital readout.

Remove the side panel to access the process blower motor.

Is the process blower motor rotating clockwise?

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 dryer.

Is the Blower Rotation Alarm activated?

Is the alarm light on and displaying a message indicating incorrect phasing?

Manual Rotation Check (if no alarm)

Remove the side panel to access the process blower motor.

Is the process blower motor rotating clockwise?