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717.3.3 Damper Actuation
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717.3.3.1 Fire Damper Actuation
Primary heat responsive devices used to actuate fire dampers shall meet one of the following requirements:
- The operating temperature shall be approximately 50°F (10°C) above the normal temperature within the duct system, but not less than 160°F (71°C).
- The operating temperature shall be not more than 350°F (177°C) where located in a smoke control system complying with Section 909.
717.3.3.2 Smoke Damper Actuation
The smoke damper shall close upon actuation of a listed smoke detector or detectors installed in accordance with Section 907.3 and one of the following methods, as applicable:
- Where a smoke damper is installed within a duct, a smoke detector shall be installed inside the duct or outside the duct with sampling tubes protruding into the duct. The detector or tubes within the duct shall be within 5 feet (1524 mm) of the damper. Air outlets and inlets shall not be located between the detector or tubes and the damper. The detector shall be listed for the air velocity, temperature and humidity anticipated at the point where it is installed. Other than in mechanical smoke control systems, dampers shall be closed upon fan shutdown where local smoke detectors require a minimum velocity to operate.
- Where a smoke damper is installed above smoke barrier doors in a smoke barrier, a spot-type detector shall be installed on either side of the smoke barrier door opening. The detector shall be listed for releasing service if used for direct interface with the damper.
- Where a smoke damper is installed within an air transfer opening in a wall, a spot-type detector shall be installed within 5 feet (1524 mm) horizontally of the damper. The detector shall be listed for releasing service if used for direct interface with the damper.
- Where a smoke damper is installed in a corridor wall or ceiling, the damper shall be permitted to be controlled by a smoke detection system installed in the corridor.
- Where a smoke detection system is installed in all areas served by the duct in which the damper will be located, the smoke dampers shall be permitted to be controlled by the smoke detection system.
717.3.3.3 Combination Fire/Smoke Damper Actuation
Combination fire/smoke damper actuation shall be in accordance with Sections 717.3.3.1 and 717.3.3.2. Combination fire/smoke dampers installed in smoke control system shaft penetrations shall not be activated by local area smoke detection unless it is secondary to the smoke management system controls.
717.3.3.4 Ceiling Radiation Damper Actuation
The operating temperature of a ceiling radiation damper actuation device shall be 50°F (27.8°C) above the normal temperature within the duct system, but not less than 160°F (71°C).
717.3.3.5 Corridor Damper Actuation
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Related Code Sections
607.3.3 Duct Systems, Damper Actuation
Damper actuation shall be in accordance with Sections 607.3.3.1 through 607.3.3.5 as applicable ...
717.3.3 Fire and Smoke Protection Features, Damper Actuation
Damper actuation shall be in accordance with Sections 717.3.3.1 through 717.3.3.5 as applicable ...
717.3.3 Fire and Smoke Protection Features, Damper Actuation
Damper actuation shall be in accordance with Sections 717.3.3.1 through 717.3.3.5 as applicable ...
717.3.3.2 Fire and Smoke Protection Features, Smoke Damper Actuation
The smoke damper shall close upon actuation of a listed smoke detector or detectors installed in accordance with Section 907.3 and one ...
717.3.3.5 Fire and Smoke Protection Features, Corridor Damper Actuation
Corridor damper actuation shall be in accordance with Sections 717.3.3.1 and 717.3.3.2 ...