Sensor Cleaning - EDWARDS SYSTEMS TECHNOLOGY IRC-3 Maintenance And Troubleshooting Manual

Maintenance and Troubleshooting Manual
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4. By shorting the various zones with a jumper wire, the various visual
alarm indicators may be visually checked for operation; this test will
also electrically test the panel for proper operation.
Upon conclusion of routine and/or preventative maintenance actions,
verify system operation and inform all responsible parties of system
restoration.
Sensor Alert
A "SENSOR ALERT" message is displayed on the CM1N when the
sensitivity of an addressable analog detector has increased to a level
where unwarranted alarms may occur. Inspection and cleaning of the
detector is indicated.
Magnet Testing
Addressable analog sensors are equipped with a reed switch for testing
purposes. To test the sensor, place a magnet near the plastic base
directly across from the Test Socket. This activates the sensor and
generates an alarm response for the sensor's address.

Sensor Cleaning

NFPA 72 states ,"All smoke detectors shall be visually inspected in
place at least semi-annually to identify missing detectors, detectors
with impeded smoke entry, abnormally dirty detectors, and detectors
no longer suitably located because of occupancy or structural changes".
NFPA 72 also states that a test shall be performed annually "to assure
that each smoke detector is operative and produces the intended
response".
The following recommendations have been extracted from field
bulletins published by the manufacturer of 400 and 500 detectors.
400 and 500 Series Photoelectronic Smoke Detectors
Before cleaning, notify the proper authorities that the system is being
tested. Disable the zone or system to prevent undesirable, unwanted
alarms and proceed with testing and/or maintenance.
1. Remove detector cover by inserting a small blade screwdriver into
the slot provided 90° from the test jack receptacle and twisting the
cover clockwise.
2. Lift screen from photo chamber. Vacuum screen and cover before
using clean compressed air to dislodge and remove any remaining
debris. Replace screens if necessary; part number RS24 (photo) and
RS24T (thermal).
3. Vacuum photo chamber and then use compressed air to remove any
remaining debris and blow area clean.
4. Before re-assembly, be sure all parts are clean.
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