Bosch | 6/04 | 49323C
4
D285DH
| Installation Instructions |
5.0
Maintenance
Notify all concerned parties before any fire
alarm system maintenance or testing and
again after test completion.
At least once a year clean the detector and base using a
vacuum or clean/dry compressed air paying particular
attention to the screens. In dusty areas or areas of heavy
insect concentration, cleaning might be required more
often.
To clean the detectors:
1.
Remove the duct housing cover.
2. Remove the detector from its base.
3. Clean both the base and cover with a clean cloth
and common window cleaner.
4. Remove the detector’s cover.
Use a thin, flathead screwdriver to pry the chassis
from the cover. Then insert the screwdriver into the
cover slots and pry up (refer to Item 1 in Figure 2).
5. Gently pry the cover tab away from the chamber
cover. Then pull the chamber cover up and away
from the chamber (refer to Item 2 in Figure 3).
6. Remove dust and debris from the chassis area using
clean, dry compressed air or a vacuum.
7.
Replace the chamber to ensure the hole for the LED
is properly aligned over the LED.
Align by placing the chamber parallel to the chassis
and gently snapping the locking tabs into place.
8. Replace the detector’s cover carefully lining up the
holes for the LED and thermistor.
9. Return the detector to its base.
10. Place duct housing cover on the detector.
After cleaning, test the detector for proper
calibration using one of the tests described
in Section 6.0 Periodic Tests on page 5.
Do not paint the detector. Paint or other
foreign matter covering the screen can
prohibit or retard smoke from entering the
detector.
Figure 2:
Removing the Detector’s Cover
1 - Cover slots (3)
2 - Detector chassis
3 - Cover
#1
1
1
1
3
2
5.0
Maintenance
Figure 3:
Removing the Detector Chamber Cover
#2
