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7351J Very Intelligent Early Warning (VIEW) Laser Smoke Detector Technical Bulletin
High Sensitivity Setting Test
The use of the 0.03% to 0.5% per ft sensitivity setting requires a 90-day
test period to ensure that the detector’s environment is suitable for this
setting. For each detector intended for 0.03% to 0.5% per ft alarm
application, follow the steps below to meet Johnson Controls and UL
requirements for this high sensitivity application.
1.
Set the initial alarm setting 0.5% per ft obscuration alarm level.
2.
Set the initial pre-alarm setting for the detector to the intended alarm
setting of the system.
3.
Set the pre-alarm for nonlatching operation.
Notes:
Detectors set at 0.03% to 0.5% per ft are intended for use in
smoke-free, environmentally controlled applications, such as computer
rooms and clean rooms. To determine if an environment is suitable for
installation, operate the detectors continuously for 90 days with all
environmental factors (such as temperature, humidity, air flow,
occupancy) similar to the intended application for these detectors. Use an
electronic history file or printer to record all events associated with the
detectors under testing.
At the end of 90 days, a Johnson Controls branch representative (or end
user trained by a Johnson Controls branch representative), should inspect
the results of the test by reviewing the data collected in the history file of
the system control panel or the record on the system’s printer. If no alarms
or pre-alarms are recorded for the detectors under testing, set the system to
the tested pre-alarm level in the 0.03% to 0.5% per ft range.
This section contains procedures for cleaning the devices.
IMPORTANT:
This detector must be tested and maintained regularly
following NFPA requirements. Clean the detector at least once a year and more
frequently in dirty environments.
Before cleaning a device:
1.
Notify the proper authorities that the system is undergoing
maintenance and is out of service temporarily.
2.
Disable the system to prevent unwanted alarms.
!
WARNING: Risk of Personal Injury.
Remove power before disassembling the unit.
Maintenance
Before Cleaning
