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APPLICATION
Model FSD-311V is a vertical blade class I leakage rated combi-
nation fire smoke damper. High strength airfoil blades ensure the
lowest resistance to airflow in HVAC systems with velocities to 4000
fpm (20.3m/s) and 4 in. wg (1.0 kPa).
RATINGS
UL 555 Fire Resistance Rating:
Fire Rating: 1½ hours
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity: up to 4000 fpm (20.3 m/s)
Max. Pressure: 4 in. wg (1 kPa)
UL555S Leakage Rating:
Leakage Class: I
Operational Rating: Actual ratings are size dependent
Max. Velocity: up to 4000 fpm (20.3m/s)
Max. Pressure: 4 in. wg (1 kPa)
Maximum Temperature: 350°F (177°C)- depending upon
the actuator
STANDARD CONSTRUCTION
Frame: 5 in. x 1 in. (127mm x 25mm)
galvanized steel hat channel with
reinforced corners. A low profile
head and sill are used on sizes less
than 17 in. (432mm) high to
maximize free area and
performance.
Blades: Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2 mm) equivalent thickness.
Seals: Extruded silicone rubber blade
seals. Flexible stainless steel jamb
seals.
Closure Device: RRL 165°F (74°C)
Linkage: Concealed in jamb.
Axles:
1
/2 in. (13mm) dia. plated steel.
Bearings: 304 stainless steel
SIZE LIMITATIONS:
Minimum Size:
6 in. W x 8 in. H
(152mm W x 203mm H)
Maximum Size-
Single Section: 50 in. W x 32 in. H
(1270mm W x 813mm H)
Multiple Section: 100 in. W x 32 in. H
(2540mm W x 813mm H)
OPTIONAL FEATURES
• OCI (Open closed indication switches)
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Transitions (R, C, O)
• POC retaining angles
• Momentary Switch
• Sealed transitions and sleeves
• RRL/OCI (Open closed indication switches)
• 165ºF (74°C), 212ºF (100°C), 250ºF (121°C), 350ºF (177°C) RRL's
available
• TOR (remote override closure allows damper to perform smoke
management functions during a fire emergency.)
• PRV (pneumatic relief valve)
• Security Bars
• Sealed transitions and sleeves
Model FSD-311V
Combination FIRE SMOKE DAMPERS
Steel Airfoil Blades
UL 555S Leakage Class I
UL555 1 1/2 Hour Fire Resistance Rating
*W&H dimensions furnished approximately
1
/4 in. (6mm) undersize.
W*
H*
Model FSD-311V meets the requirements for fire
dampers, smoke dampers and combination fire
smoke dampers established by:
National Fire Protection Association
NFPA Standards 80, 90A, 92A, 92B, 101 & 105
IBC International Building Codes
ICBO Uniform Building Codes
CSFM California State Fire Marshal
Fire Damper Listing (#3225-0981:103)
Leakage (Smoke) Damper Listing (#3230-0981:104)
New York City (MEA listing #260-91-M)
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
Installation instructions available at www.greenheck.com