F - 2
Appendix F
If a detector with Envirolink (IEC)
reports an alarm condition before the
detectors alarm threshold is adjusted,
the alarm delays until the alarm thresh-
old is adjusted. If the device continues
to report an alarm condition once its
alarm threshold is adjusted, the alarm
reports.
If the CSG-M and the device ID do not
agree, the IEC for that device does not
activate until the trouble condition is
removed from the system and the
panel is reset.
MXL Power On
When a system is brought on-line, or
when there is a complete loss of
power in an MXL-R enclosure contain-
ing detectors with IEC applied, the
operator must perform a reset se-
quence for the IEC devices in that
MXL-R and also reset the MXL.
When an MXL-R is powered the first
time, and there is no data for IEC
devices, MXL leaves these devices at
the default alarm threshold. However,
if former IEC data is available, MXL
adjusts the device alarm threshold
accordingly.
Ongoing Adjustments of the
Alarm Threshold
Environmental conditions usually cause
a small change in the analog voltage
over a long period of time. At regular
intervals MXL collects analog data for
each detector with IEC and adjusts the
alarm threshold accordingly. MXL
adjusts for both up and down changes
in the analog voltage. In addition, if
system power is lost, MXL adjusts the
alarm thresholds as needed by using
stored data.
Indicating IEC Trouble Conditions
A trouble condition involving the IEC
may be annunciated by the MXL as:
PRE-DIRTY ANALOG VOLT. REACHED
OR
IEC LIMIT REACHED. SERVICE REQ
The trouble conditions shown above
are annunciated on a detector-by-
detector basis as each detector is
checked.
MXL annunciates a trouble condition
for a detector when its alarm threshold
reaches a predetermined limit. The
operator should acknowledge the
trouble, clean the detector if possible,
and reset the control panel. If the
detector is not cleaned, the control
panel annunciates this trouble condi-
tion after every panel reset until the
detector is cleaned. When it is
cleaned, that is detected by the Auto
Clean Detection feature.
Automatic Cleanliness Detection
MXL automatically detects when an
IEC detector was cleaned and checks
whether the detector is considered
clean by MXLs standards. If the
detector is clean, IEC data for that
device is reset to clean levels, and the
following message prints:
Detector Cleaned
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Содержание Cerberus PYROTRONICS MXL
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Страница 309: ...A 2 Appendix A Technical Manuals Online http www tech man com firealarmresources com ...
Страница 311: ...B 2 Appendix B Technical Manuals Online http www tech man com firealarmresources com ...
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