Greenheck Fan OFSD-311 Ventilation Hood User Manual


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Application
Model OFSD-311 is an ‘out of the wall’ high performance combination
fire smoke damper with class I leakage. OFSD-311 is approved for
use in walls, partitions, and floors with fire resistance ratings less
than 3 hours. Removal of wall grille allows access to actuator and
other components. High strength airfoil blades insure the lowest
resistance to airflow in HVAC systems with velocities to 3000 fpm
(15.2 m/s) and pressures to 4 in. wg (1 kPa). Model OFSD-311 shall
be installed vertically (with blades running horizontal) or horizontally
and is rated for airflow and leakage in either direction.
Ratings
UL555 Fire Resistance Rating:
Fire Rating: 1
1
⁄2 hours in walls
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity: up to 3000 fpm (15.2 m/s)
Max. Pressure: 4 in. wg (1 kPa) - differential pressure
UL555S Leakage Rating:
Leakage Class: I
Operational Rating: Actual ratings are size dependent
Max. Velocity: up to 3000 fpm (15.2m/s)
Max. Pressure: 4 in. wg (1 kPa)
Max. Temperature: 350ºF (177ºC)- 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.
Blades: Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2mm) equivalent thickness.
Seals: Extruded silicone rubber blade seals.
Flexible stainless steel jamb seals.
Linkage: Concealed in jamb
Closure Device: RRL 165°F (74ºC)
Axles:
1
⁄2 in. (13mm) dia. plated steel
Bearings: Bronze sleeve type
Sleeve: Galvanized; wrapped with thermal
blanket
Size Limitations:
Minimum Size: 12 in.W x 12 in. H
(305mm x 305mm)
Maximum Size:
Single section: 32 in. W x 30 in. H
(813mm W x 762mm H)
Multiple Section: 36 in.W x 36 in. H
(914mm x 914mm)
OPTIONAL FEATURES:
• POCretainingAngles
• RRL/OCI(openclosedindicationswitches)
• 165ºF(74ºC),212ºF(100ºC),250ºF(121ºC),350ºF(177ºC)RRL’s
available
•TOR(remoteoverrideallowsdampertoperformsmoke
management functions during fire emergency.)
• Electricorpneumaticactuatorstoaccomplishsmoke
management and system functions.
•Smokedetectors
•Momentaryswitch
•PRV(pneumaticreliefvalve)
•Securitybars
•Sealedtransitionandsleeves
Model OFSD-311
Out of Wall Combination Fire Smoke Dampers
Steel Airfoil Blades
UL 555S Leakage Class I
UL555 1
1
⁄2 Hour Fire Resistance Rating
Horizontal or Vertical Mount
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
* W & H dimensions furnished approximately
1
⁄4 in. (6mm) undersize.
(Add blanket thickness (
1
⁄8 in.[3mm]) and sleeve thickness for
overall sleeved damper dimension)
Oversize wall opening as follows:
Nominal damper size plus
3
⁄8 in.(9.5mm) (see Page 6)
R
Greenheck Fan Corporation certifies that the
model OFSD-311 shown herein is licensed to
beartheAMCASeal.Theratingsshownare
based on tests and procedures performed in
accordance with AMCA Publication 511 and
comply with the requirements of the AMCA
CertifiedRatingsPrograms.TheAMCACertified
Ratings Seal applies to air performance ratings
only.
Model OFSD-311 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
SBCCI Standard 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)
Installation instructions available at www.greenheck.com
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