Sterling Power Products 30F to 65F Auto-TuningSMC Series Chillers, Down Key, Up Key

Important!

Do not change any of the control settings without consulting

the Sterling Service Department.

The AEC, Inc. warranty does not cover chiller failures from tampering with controller settings!

Down Key

Each press of the Down Arrow key decrements or reduces the values or settings on the SV display.

Up Key

Each press of the Up Arrow key increments or advances the values or settings on the SV display.

5-5 Auto-Tuning SMC Series Chillers

The Auto-Tune function lets you fine-tune the control PID to process requirements. Activate the Auto-Tune function whenever the process under control changes. Don't be alarmed by control response. It may take the process temperature above and below the set points as many as three (3) times. It will then level off and control to the process set point. Auto tuning can take up to 45 minutes, and is best done before any product is being run.

Important!

Factory default settings are: P = .3, I = 7, and D = 1

To auto-tune the controller:

„Press and hold down the AT AT key for several seconds until the AT indicator flashes.

„The AT LED flashes to indicate that the control is tuning itself.When the AT LED light stops flashing, the controller is tuned and ready for operation.

SMC Series Chillers Page 29