AEC WD 350 through WD3000 Dehumidifying Dryers - Manual (Page 37)

5-3 Level 2 Switches and Meters
POWER ON
Press the
POWER ON rocker switch to energize or de-energize control power to the dryer.
SYSTEM START
Press the
SYSTEM START rocker switch to start the dryer. Move this switch to the STOP
position to shut down the dryer when it is operating.
TEMP. SET POINT NORMAL
Move the
TEMP. SET POINT NORMAL rocker switch to the NORMAL position for normal
operation. Move the switch to the SHIFT position to raise or lower temperature to the alternate
temperature on the ¼ DIN controller.
ALARM SILENCE
Optional
Press the ALARM SILENCE switch to silence the horn when a high temperature alarm activates.
The alarm repeats every five minutes until the problem causing the alarm condition is cleared.
Process Air Dew Point
The Process Air Dew Point meter indicates the current process air delivery moisture content.
5-4 Level 2 PLC Controller
Your optional Level 2 PLC controller uses an Allen-Bradley programmable logic controller
(PLC). This “brick”-type controller has 16 I/O points: ten (10) inputs and six (6) outputs, and all
ten (10) inputs and six (6) outputs are 115 VAC.
All programming and logic is factory-installed on an EEPROM chip, and cannot be modified. A
battery backup retains programming if power fails. Battery life is five (5) years at room
temperature.
If the alarm indicator blinks intermittently, replace the battery within one (1) week.
Page 36 WDMR and WDFR Series Dehumidifying Dryers