K-76-1000
-22-
July 2016
Stratification and Spacing Compensation
Stratification occurs when the upward movement of smoke and gases ceases due to the loss of buoyancy
of heated smoke. Stratified air within a room may impede smoke reaching the detector. To improve
detection system response in situations where stratification exists, install additional detectors at elevations
below ceiling level as shown in Figure 14. For additional information, refer to NFPA 72, Annex B.
Figure 14. Smoke Detector Compensation for Stratification
1. Ceiling section
2. Smoke detector, at ceiling
3. Smoke detector, below ceiling
4. Side view
5. Plan view
36 in. (910 mm) min.
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2
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4
5
Summary of Contents for DS Series
Page 1: ...K 73 200 Rev AB July 2015 DS Series Addressable Detector Application Guide K 76 1000 ...
Page 2: ......
Page 3: ...July 2016 1 K 76 1000 FOREWORD ...
Page 6: ...K 76 1000 4 July 2016 NOTES ...
Page 7: ...July 2016 5 K 76 1000 OVERVIEW ...
Page 10: ...K 76 1000 8 July 2016 NOTES ...
Page 11: ...July 2016 9 K 76 1000 HEAT DETECTOR SPACING ...
Page 19: ...July 2016 17 K 76 1000 SMOKE DETECTOR SPACING ...
Page 26: ...K 76 1000 24 July 2016 NOTES ...
Page 27: ...July 2016 25 K 76 1000 HEAT DETECTOR APPLICATIONS ...
Page 29: ...July 2016 27 K 76 1000 SMOKE DETECTOR APPLICATIONS ...
Page 31: ...July 2016 29 K 76 1000 AIR DUCT SMOKE DETECTOR APPLICATIONS ...
Page 35: ...July 2016 33 K 76 1000 TESTING AND MAINTENANCE ...
Page 40: ...K 76 1000 38 July 2016 NOTES ...
Page 41: ......
