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10 CFM Compressed Air Dryer Chapter 4: Operation 19 of 30
Chapter 4: Operation
Before beginning dryer operation, make sure that there is a good compressed air connection
and that the main power is securely plugged in. Check the process hose and hopper exhaust
filter for tight connections. Check all companion equipment, such as the drying hopper; verify
that the loading system is ready for operation. The dryer will not run if a fault condition
exists. Investigate the cause of any faults.
DANGER! Always turn the dryer off before servicing. Do not attempt to check the
alarms on the controller located within the unit enclosure unless you are a
qualified electrician.
4-1 Auto-tuning the Dryer
Although the controller is calibrated at the factory, the unit should be auto-tuned prior to
dryer start-up.
Use the following procedure to auto-tune the dryer:
1. Press the Level button one time to enter the Adjustment level.
2. Press the Mode Key one time. The PV display will read “At.”
3. Press the Up Arrow button to change the value to “ON.”
4. Press the Level button to begin auto-tuning and return to the Operation level.
The unit will automatically auto-tune. While this process is taking place, the SV
display will blink the set point value. When the SV display stops blinking, the auto-
tune process is finished.
Note: It is recommended that the unit be auto-tuned when the pressure and airflow of
the compressed air have been adjusted, and the dryer is running close to
process temperature set point.
4-2 Setting the Alarm Value
The Alarm Value setting determines how many degrees the process temperature is allowed to
exceed the set point temperature before the high temperature alarm is triggered and the heater
turned off.
Use the following procedure to set the alarm value:
1. Press the Mode button two times to select the Alarm Value 1 parameter. (The PV
display will read “AL-1”).
2. Use the Up Arrow and Down Arrow buttons to change the value.
3. Press the Mode button to accept the value and begin operation.
Note: The factory default valve for this setting is 25.