ACS TC 120, Operation And Instruction Manual, Page: 33 / 48

TC 120 682.98767.00 • 10/04/2018
33
5-3 Starting the Temperature Control Unit
You can also use these steps to AUTO-TUNE the Controller, and operate the Unit with
the Controller.
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 run.
1. Push the
ON/OFF rocker switch to the ON ( | ) to energize the unit and begin the temperature
control cycle. The switch will be illuminated whenever the unit is on.
2. The unit will automatically vent for approximately one minute.
3. If needed, press and hold the vent button to purge any additional air from the process loop.
4. Set process temperature ( PV ) by pressing the Enter key until SP1 appears in the upper
display. Then press the Up Arrow or Down Arrow keys to adjust the setpoint.
5. If the unit does not maintain its process value, allow your process to reach the set point
temperature. Then Auto-tune the control by pressing the Enter key until SP1 appears in the
upper display. Then press the Up Arrow or Down Arrow keys to activate the
tune.
1) Your Water Temperature Control system operates with hot water under
pressure. To reduce the risk of scalding:

Always wear work gloves and safety glasses when operating the unit.

Never operate the unit with panels or shields removed.

Pipe the relief valve to an open drain.

Never install a fitting or hose that is rated less than 150 psig and 250

F
(1,030 kPa/10.3 bar and 121ºC).
2) To reduce the risk of electrical shock:

All electrical installation and repairs should be done by a qualified
electrician.

Ground the unit in accordance with electrical codes.

Never attempt any repairs without first opening and locking out the main
disconnect.

Never deactivate or neutralize any safety device.