AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 29)

4-4 Level 1 Process Air Temperature Controller
Standard AEC/Whitlock dryers use a microprocessor-based PID temperature controller for
maintaining process air temperature. The controller is a modular, self-contained unit you can
remove from the mounting housing. All parameters except for the process air set point are set
and adjusted at the factory; no field adjustment to the internal controls is normally necessary.
4-5 Level 1 PLC LED Indicators
Input LED Indicators
Process Blower On (Indicator 000)
The amber
Process Blower On LED lights when the blower contactor energizes.
Hi-Process Air Temp (Indicator 001)
The amber
Hi-Process Air Temp LED lights when the process air temperature is within an
acceptable operating range. The LED turns off during a high process air temperature condition.
Output LED Indicators
Left Bed In Regen (Indicator 100)
The amber
Left Bed In Regen LED lights when the left bed is in regeneration.
Right Bed In Regen (Indicator 101)
The amber
Right Bed In Regen LED lights when the right bed is in regeneration.
Left Bed Heater On (Indicator 102)
The amber
Left Bed Heater On LED lights when the left bed regenerates and is in the heat-up
portion of the regeneration cycle.
Right Bed Heater On (Indicator 103)
The amber
Right Bed Heater On LED lights when the right bed regenerates and is in the heat-
up portion of the regeneration cycle.
Status LED Indicators
Power Indicator
The green
Power LED lights when power is applied to the PLC (100-240 VAC, 50/60 Hz).
Page 28 WDMR and WDFR Series Dehumidifying Dryers