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Rev. 11-5 12/15/2020
Copyright © 2020 by Cool Air Incorporated. All rights reserved.
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The detector can be set to one of two modes: normal operating
mode or service mode. The detector is in normal operating mode
when the service jumper is in the “OFF” position. When the service
jumper is in the “ON” position, the detector continues to function as
usual, however the alarm, pre-alarm, and auxiliary relays are
disabled as well as the 4 to 20mA signal is set to 4ma (0PPM). This
allows the detector to be serviced, tested, and calibrated without
tripping the alarm relays and setting off nuisance alarms.
When the detector is in the service mode, the display will alternate
between the sensor reading in PPM and “SEr” (service jumper
“on”). This is done as a reminder to set the jumper back to “off”
when service is done. If the service jumper is not returned to off, it
will automatically return to an as off state after a selected amount of
time. The factory default is 15 minutes.
See “Setting the Service Mode Timeout”
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The “UP” and “DOWN” buttons are used for setting the digital
display to the desired value, and the “ENTER” button is used for
programming a value previously set on the digital display. These
buttons are used when programming: the set points, the external
temperature sensor installation status, they are also used during
calibration of the detector.
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The rotary selector switch (labeled “MENU SELECT” on the front
panel-mounted circuit board) is used for performing functions such
as:
•
Setting the information displayed on the front panel
•
Programming set points
•
Displaying system information
•
Calibrating the detector