1-1/2 Hour - Dynamic Rated - Fire Damper
Installation Instructions
The FD4D-B fire damper employs out of the airstream curtain style blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD4D-B is qualified to 4,000 ft/min (20.3 m/s) and 4 in.wg. (1.0 kPa) and may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours.
Frame: 22 ga. (0.85) galvanized steel.
Blades: 24 ga. (0.7) galvanized steel - curtain style.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165oF (75oC)
Minimum Size: 6" x 4" (152 x 102)
Maximum Size: Single Section: Vertical: 36" x 44" (914 x 1118)
Horizontal: 36" x 33" (914 x 838)
Multiple Section: Vertical: 120" x 69" (3048 x 1753)
72" x 117" (1829 x 2972)
Horizontal: 36" x 34" (914 x 864)
72" x 16" (1829 x 4067)
Stainless Steel: Single Section: Vertical: 36" x 33" (914 x 838)
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