3 Hour - Static Fire Damper
Installation Instructions
The FD4-3B fire damper employs tcurtain style blades for point-of-origin control of fire in static HVAC systems. The FD4-3B may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 4 hours.
Frame: 22 ga. (0.85) galvanized steel.
Blades: 24 ga. (0.7) galvanized steel - curtain.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165oF (75oC)
Minimum Size: Vertical Mount: 4" x 2" (102 x 51)
Horizontal Mount: 6" x 8" (152 x 203)
Maximum Size: Single Section: Vertical: 36" x 33" (915 x 838)
Horizontal: 38" x 33" (965 x 838)
Multiple Section: Vertical: 108" x 21" (2743 x 533)
Horizontal: 76" x 93" (1931 x 2362)
Stainless Steel: Single Section: Vertical: 36" x 21" (914 x 553)
Multiple Section: 108" x 21" (2743 x 533)
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