| 2019-09-09 13:24:17 | THE FOLLOWING IS SUBMITTED AS RECOMMENDATION FOR DUCT |
| | DETECTOR TO GO THE SUPERVISORY. |
| | |
| | PER NFPA 90A, 2015 ED. |
| | |
| | 6.4.3* FUNCTION. |
| | 6.4.3.1 SMOKE DETECTORS PROVIDED AS REQUIRED BY 6.4.2 |
| | SHALL AUTOMATICALLY STOP THEIR RESPECTIVE FAN(S) ON |
| | DETECTING THE PRESENCE OF SMOKE. |
| | |
| | 6.4.4.2 IN ADDITION TO THE REQUIREMENTS OF 6.4.3, WHERE |
| | AN APPROVED FIRE ALARM SYSTEM IS INSTALLED IN A |
| | BUILDING, THE SMOKE DETECTORS REQUIRED BY THE |
| | PROVISIONS OF SECTION 6.4 SHALL BE CONNECTED TO THE |
| | FIRE ALARM SYSTEM IN ACCORDANCE WITH THE REQUIREMENTS |
| | OF NFPA 72, NATIONAL FIRE ALARM AND SIGNALING |
| | CODE. |
| | |
| | 6.4.4.2.1 SMOKE DETECTORS USED SOLELY FOR CLOSING |
| | DAMPERS OR FOR HEATING, VENTILATING, AND |
| | AIR-CONDITIONING SYSTEM SHUTDOWN SHALL NOT BE REQUIRED |
| | TO ACTIVATE THE BUILDING EVACUATION ALARM. |
| | |
| | 6.4.4.3 WHERE SMOKE DETECTORS REQUIRED BY SECTION 6.4 |
| | ARE INSTALLED IN A BUILDING NOT EQUIPPED WITH AN |
| | APPROVED FIRE ALARM SYSTEM AS SPECIFIED BY 6.4.4.2, THE |
| | FOLLOWING SHALL OCCUR: |
| | (1) SMOKE DETECTOR ACTIVATION REQUIRED BY SECTION 6.4 |
| | SHALL CAUSE A VISUAL SIGNAL AND AN AUDIBLE SIGNAL IN A |
| | NORMALLY OCCUPIED AREA. |
| | (2) SMOKE DETECTOR TROUBLE CONDITIONS SHALL BE |
| | INDICATED VISUALLY OR AUDIBLY IN A NORMALLY OCCUPIED |
| | AREA AND SHALL BE IDENTIFIED AS AIR DUCT DETECTOR |
| | TROUBLE. |
| | |
| | PER NFPA 72, 2013 ED |
| | 23.8.5.4.6 SIGNAL INITIATION ? DUCT SMOKE DETECTORS. |
| | 23.8.5.4.6.1 WHERE DUCT SMOKE DETECTORS ARE REQUIRED TO |
| | BE MONITORED AND A BUILDING FIRE ALARM SYSTEM IS |
| | INSTALLED, A DUCT DETECTOR ACTIVATION SIGNAL SHALL MEET |
| | THE REQUIREMENTS OF 21.7.4. |
| | 21.7.4 SMOKE DETECTORS MOUNTED IN THE AIR DUCTS OF HVAC |
| | SYSTEMS SHALL INITIATE A SUPERVISORY SIGNAL. |
| | 21.7.4.1 SMOKE DETECTORS MOUNTED IN THE AIR DUCTS OF |
| | HVAC SYSTEMS IN A FIRE ALARM SYSTEM WITHOUT A |
| | CONSTANTLY ATTENDED LOCATION OR SUPERVISING STATION |
| | SHALL BE PERMITTED TO INITIATE AN ALARM SIGNAL. |
| | 21.7.4.2 SMOKE DETECTORS MOUNTED IN THE AIR DUCTS OF |
| | HVAC SYSTEMS SHALL BE PERMITTED TO INITIATE AN ALARM |
| | SIGNAL WHERE REQUIRED BY OTHER GOVERNING LAWS, CODES, |
| | OR STANDARDS. |
| | |
| | PLEASE REVIEW FOR CONSIDERATIONS IN AN EFFORT TO REDUCE |
| | FALSE ALARM RESPONSES. |
| | |
| | |
| | PETER LEDUC |
| | FIRE MARSHAL |
| | 561-804-4709 |
| | [email protected] |
| | |
