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7.0 HAZARDOUS AREA OPERATION
7.1 The DE-2500 system is CSA certified for CLASS I, DIVISION 2, GROUPS C and D areas when
mounted in a suitable enclosure.
In addition, the following requirements must be met (see NFPA standard no. 493):
1. The low voltage sensor switch wires within the panel enclosure must be kept at least two
(2) inches away from other wiring. Run the sensor switch wires leaving the panel in a
separate conduit from all other wiring and keep them separate throughout the installation.
2. Wiring to the sensors must have a grade of insulation capable of withstanding an AC
voltage of 500 volts RMS.
3. Sensor wires must be run in separate conduits and junction boxes from high voltage wires
such as ignition, fuel valve, and other high voltage wiring.
WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY AND/OR
SUITABILITY FOR CLASS I, DIV. 2, GROUPS C and D.
DO NOT DISCONNECT EQUIPMENT IN DIV. 2 ENVIRONMENT UNLESS POWER IS
SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.
8.0 KEYPAD DESCRIPTION
8.1 The DE-2500 controller Display Module contains a sixteen-key sealed membrane keypad which
is used to stop, reset and test the system. The user can also view process information
screens, view channel specifics, cancel timers, and view and edit pertinent operating
parameters.
8.2 STOP - The STOP key is used for a manual stop condition. By pressing the STOP key, the
controller activates the configured output modules in the power supply.
8.3 RESET - The RESET key clears all past faulted points and resets all input and output timers
to their preset values.
8.4 TEST - The TEST key disables the output modules and allows the user to fault or test the input
sensors. Every time the test button is pressed, the test timer resets to its preset value.
8.5 CANCEL TIMERS - The CANCEL TIMERS key cancels all timers.
8.6 VIEW CHAN - The VIEW CHANNELS key allows the user to view the status of any input
channel and its user defined label.
8.7 NEXT - The NEXT key allows the user to view the CAPACITY CONTROL & RPM SETPOINT
CONTROL screens from the home screen. From the VIEW screen, allows the user to view the
next process information screen. From the MENU screens, the next value to be edited.
8.8 VIEW - The VIEW key allows the user to view the process information screens.
8.9 ENTER - The ENTER key is used to accept a selection and to save a new value in memory.
8.10 ESC - The ESCAPE key enables the user to exit any view channels, information or menu
screens at any time and return to the previous screen without changing programmed values.
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