Text on the drawing
A. REFER TO MECHANICAL AND ELECTRICAL FLOOR PLANS AND DETAILS FOR FIRE/SMOKE DAMPER AND DUCT SMOKE DETECTOR QUANTITIES AND LOCATIONS. CONNECT DAMPERS TO 120V 20A BRANCH CIRCUITS AS INDICATED ON ELECTRICAL DRAWINGS. B. COORDINATE DUCT SMOKE DETECTOR INSTALLATION AT EACH FSD LOCATION AND MAIN RETURN AIR DUCT LOCATION PRIOR TO COMMENCING WORK. PROVIDE ALL WORK TO SUIT INSTALLATION REQUIREMENTS AND ALL APPLICABLE CODES. GENERAL NOTES: NORMAL SYSTEM OPERATION: 1. FIRE ALARM SYSTEM CLOSES COMBINATION FIRE/SMOKE DAMPERS WHEN CORRESPONDING FAN SYSTEM IS OFF. 2. DDC SYSTEM PROVIDES REQUIRED FAN SYSTEM STATUS SIGNALS TO FIRE ALARM SYSTEM TO ACHIEVE THIS OPERATION. UPON THE DETECTION OF SMOKE BY ANY DUCT SMOKE DETECTOR: 1. THE FIRE ALARM SYSTEM SIGNALS THE AIR HANDLING UNIT IN ALARM TO SHUTDOWN VIA ADDRESSABLE CONTROL RELAY LOCATED AT EACH AIR HANDLING UNIT. 2. THE FIRE ALARM SYSTEM PROVIDES A SIGNAL TO THE DDC SYSTEM VIA SINGLE ADDRESSABLE CONTROL RELAY TO INITIATE THE DDC SYSTEM SHUTDOWN MODE. 3. UPON CONFIRMATION THAT AIR HANDLING UNITS HAVE SHUTDOWN, THE DDC SYSTEM PROVIDES FAN SHUTDOWN STATUS SIGNAL TO THE FIRE ALARM SYSTEM. 4. THE FIRE ALARM SYSTEM CLOSES COMBINATION FIRE/SMOKE DAMPERS VIA ADDRESSABLE CONTROL RELAY(S) 20-SECONDS (ADJUSTABLE) AFTER FAN SHUTDOWN SIGNAL OCCURRED. UPON FIRE ALARM RESET AFTER THE DETECTION OF SMOKE HAS OCCURRED: 1. THE FIRE ALARM SYSTEM OPENS COMBINATION FIRE/SMOKE DAMPERS VIA ADDRESSABLE CONTROL RELAY(S). 2. THE FIRE ALARM SYSTEM DISABLES FAN SHUTDOWN SIGNAL TO THE DDC SYSTEM VIA SINGLE ADDRESSABLE CONTROL RELAY. 3. THE FIRE ALARM SYSTEM DISABLES SHUTDOWN SIGNAL TO EACH AIR HANDLING UNIT VIA ADDRESSABLE CONTROL RELAY. SEQUENCE OF OPERATIONS: C 10 12 2 5 WIRING BY DIVISION 26 NONE 1 HVAC AND FIRE ALARM INTERFACE WITH FSD STATUS INDICATOR
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