D500-02-00
4
I56-309-03
© Notifier 1990/Rev. 5-96
2. Vacuum the screen carefully without removing it. If further cleaning is required continue with Step 3, otherwise skip to
Step 6.
3. Remove the screen by pulling it straight out. Vacuum the inside.
4. Clean the vaned chamber piece by vacuuming or blowing out dust and particles.
5. To replace the screen, orient it so that the arrow on top aligns with the field test slot on the base of the detector. Care-
fully push the screen onto the base making sure it fits tightly to the chamber.
6. Replace the cover by gently rotating it clockwise until it locks in place.
WARNING
Limitations of Smoke Detectors:
This smoke detector is designed to activate and initiate emergency action, but will do so only when it is used in
conjunction with an authorized fire alarm system. This detector must be installed in accordance with NFPA standard 72.
Smoke detectors will not work without power. AC or DC powered smoke detectors will not work if the power supply
is cut off.
Smoke detectors will not sense fires which start where smoke does not reach the detectors. Smoldering fires
typically do not generate a lot of heat which is needed to drive the smoke up to the ceiling where the smoke detector is
usually located. For this reason, there may be large delays in detecting a smoldering fire with either an ionization type
detector or a photoelectric type detector. Either one of them may alarm only after flaming has initiated which will
generate the heat needed to drive the smoke to the ceiling.
Smoke from fires in chimneys, in walls, on roofs or on the other side of a closed door(s) may not reach the smoke
detector and alarm it. A detector cannot detect a fire developing on another level of a building quickly or at all. For these
reasons, detectors shall be located on every level and in every bedroom within a building.
Smoke detectors have sensing limitations, too. Ionization detectors and photoelectric detectors are required to pass
fire tests of the flaming and smoldering type. This is to ensure that both can detect a wide range of types of fires.
Ionization detectors offer a broad range of fire sensing capability but they are somewhat better at detecting fast flaming
fires than slow smoldering fires. Photoelectric detectors sense smoldering fires better than flaming fires which have
little, if any, visible smoke. Because fires develop in different ways and are often unpredictable in their growth, neither
type of detector is always best, and a given detector may not always provide early warning of a specific type of fire.
In general, detectors cannot be expected to provide warnings for fires resulting from inadequate fire protection prac-
tices, violent explosions, escaping gases which ignite, improper storage of flammable liquids like cleaning solvents
which ignite, other similar safety hazards, arson, smoking in bed, children playing with matches or lighters, etc. Smoke
detectors used in high air velocity conditions may have a delay in alarm due to dilution of smoke densities created by
frequent and rapid air exchanges. Additionally, high air velocity environments may create increased dust contamination,
demanding more frequent maintenance.
Smoke detectors cannot last forever. Smoke detectors contain electronic parts. Even though smoke detectors are
made to last over 10 years, any part can fail at any time. Therefore, smoke detectors shall be replaced after being in
service for 10 years. The smoke detector system that this detector is used in must be tested regularly per NFPA 72.
This smoke detector should be cleaned regularly per NFPA 72 or at least once a year.
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