AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 34)

5 Additional Level 2 Controller Features
5-1 Level 2 Control Panel
Optional
The optional Level 2 controller option operates identically to the standard Level 1 controller
covered in the previous chapter. However, this controller adds front-mounted
SYSTEM
START/STOP and TEMP. SET POINT NORMAL/SHIFT switches and Blower On , High Regen
Air Temp. , and Dirty Filter indicators. The following page shows a typical Level 2 controller.
5-2 Level 2 Control Panel Indicator Lights
Process Heater On
The
Process Heater On indicator lights when the process air heater is energized.
Hi-Process Air Temp
The
Hi-Process Air Temp alarm indicator lights when the temperature at the process air
thermocouple is above the high alarm set value. This indicator lights when the alarm relay
energizes; all heaters turn off and the blower remains on.
The alarm mode and value are factory-set to track 25º above the process set point. The alarm
value is a deviation above the process set point. When the temperature at the process
thermocouple returns to within the acceptable range, the alarm output de-energizes and all
heaters turn on again automatically. You can adjust the alarm value; see Section 6-5 on Page 43
for more information.
WDMR and WDFR Series Dehumidifying Dryers Page 33