ZEKS Eclipse
TM
90-5,000ZPB Desiccant Dryers
www.zeks.com
7
6.0 PRINCIPLES OF OPERATION
6.9 DRYER CONTROLS
Operation of ZEKS ZPB Series dryers in standard NEMA 1
con
fi
guration is automatically controlled by a Solid State Timer
(SST) in conjunction with pneumatically actuated valves. Timing
functions are performed by the SST to control all steps of the
drying Operating Cycle.
Dryers that are equipped with the NEMA 4/Digital Controller
option are controlled by a Digital Controller that includes an
illuminated display and keypad, accessible on the dryer Main
Panel.
6.9.1 OPERATING THE OPTIONAL DIGITAL CONTROLLER
The illustration shown below summarizes the Controller keypad
functions included with the NEMA 4/Digital Controller option.
When power is
fi
rst applied to the dryer, this microprocessor
controller will illuminate and brie
fl
y display an INITIALIZATION
SCREEN before changing to the default HOME SCREEN. From
this screen the user can navigate to start, stop, monitor or alter
the dryer Operating Cycle and test dryer functions.
CONTROLLER BUTTONS AND KEYS
•
i INFORMATION BUTTON
Restricted Level access - for factory use only.
•
ON/RESUME BUTTON
Initiates Dryer Operating Cycle. Begins system
monitoring and valve switching functions.
•
OFF/PAUSE BUTTON
Stops Dryer Operating Cycle. Stops valve switching
functions. Initiates Shutdown Sequence. Dryer remains
pressurized. Hold for 5 seconds for OFF function.
When Remote START/STOP is enabled, OFF button
is disabled. Compressor Shutdown will terminate dryer
operation.
•
NUMERAL KEYS
Allow the operator to enter values for selectable
settings and assignments.
•
ESC BUTTON
Description.
•
+ / - BUTTON
Used to toggle or change multistate variables. Also
allows entering negative numbers in numeric input
variables.
•
ENTER BUTTON
Used to change and accept set point values.
•
NAVIGATION KEYS (ARROWS)
Enables navigation between screens and lines.
INFORMATION ACCESS
DRYER ON
DRYER OFF
NUMERIC ENTRY KEYS
EXIT CURRENT SCREEN
INCREASE/DECREASE VALUE
ENTER VALUE
ACCEPT SELECTION
NAVIGATION KEYS
ILLUMINATED
DISPLAY SCREEN
