AEC TCU Series Open Reservoir Water Temperature Control Units - Manual (Page 31)

Page 32 Open Resevoir Water Temperature Control Units
4-2 The Microprocessor Controller
The controller is an easy-to-operate microprocessor-based PID control device. When the
process reaches the set point, the PID control cycles the cooling valve and/or immersion
heater to maintain the proper leaving water temperature.
The controller has been fully factory tested. Set the desired process temperature set point and
the control does the rest.
Built-in range of operation on the controller is 0°F to 180°F (-17ºC to 82ºC).
If your unit is equipped with the Advanced Controller or M2B+
please refer to the enclosed manual for additional information.
4-3 Controller Display
See Figure 7
Measured Temperature Value Numeric LED
During normal operation, the large green PV Process Value LED on the controller
displays the actual process temperature at the To Process thermocouple. It also lists
parameter symbols during setup and error messages if an error occurs.
Required Temperature Numeric LED
During normal operation, the smaller green SP Set Value LED on the controller
displays the process set point you want the chiller to maintain. It also displays
parameter and pre-set function values during setup.
Figure 7
Typical 3216 Microprocessor Controller