Greenheck Fan OFSD-211 User Manual
Out Of Wall Combination FIRE SMOKE DAMPERS
R
APPLICATION
Model OFSD-211 is approved for use in walls, partitions, and floors
with fire resistance ratings less than 3 hours. OFSD-211 is an ‘out of
the wall’ high performance combination fire smoke damper with 3V
style blades. Removal of wall grille allows access to actuator and
other components. This model's operational ratings of 2000 fpm (10.2
m/s) and pressures to 4 in. wg (1 kPa). Model OFSD-211 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
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity: 2000 fpm (10.2 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: 2000 fpm (10.2m/s)
Max. Pressure: 4 in. wg (1 kPa)
Max. Temperature: 350ºF (177ºC)- depending upon the
actuator
STANDARD CONSTRUCTION
1
⁄2 hours in walls
Model OFSD-211
Steel 3V Blades
UL 555S Leakage Class I
UL555 11⁄2 Hour Fire Resistance Rating
Horizontal or Vertical Mount
Model OFSD-211 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)
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: 16 ga. (1.5mm) galvanized steel,
reinforced with 3 longitudinal
structurally designed vee's.
Seals: Extruded silicone rubber blade seals.
Flexible stainless steel jamb seals.
Linkage: Concealed in jamb
Closure Device: UL listed 165°F (74ºC) RRL
Axles: ½ 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: 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 actuators
• Momentary switch
• Security bars
• Sealed transition and sleeves
Installation instructions available at www.greenheck.com
Greenheck Fan Corporation certifies that the
model OFSD-211 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.
* W & H dimensions furnished approximately 1⁄4 in. (6mm) undersize.
(Add blanket thickness (
sleeved damper dimension)
Oversize wall opening as follows:
Nominal damper size plus
1
⁄8 in.[3mm]) and sleeve thickness for overall
3
⁄8 in.(9.5mm) (see Page 6)
Pressure Drop Data OFSD-211
5D 6D
5D 6D
5D
D
4 (W) (H)
3.14
5D 6D
5D
D
4 (W) (H
)
3.14
This pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three configurations shown. All
data has been corrected to represent standard air at a density of .075 lb/ft3 (1.201 kg/m3).
Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an
analysis of other system influences should be used to estimate actual pressure losses for a damper installed in a given HVAC
system.
AMCA Test Figures
Figure 5.3 Illustrates a fully ducted damper. This configuration has the lowest pressure drop of the three test configurations
because entrance and exit losses are minimized by straight duct runs upstream and downstream of the damper.
Figure 5.2 Illustrates a ducted damper exhausting air into an open area. This configuration has a lower pressure drop than
Figure 5.5 because entrance losses are minimized by a straight duct run upstream of the damper.
Figure 5.5 Illustrates a plenum mounted damper. This configuration has the highest pressure drop because of extremely high
entrance and exit losses due to the sudden changes of area in the system.
Figure 5.3
Figure 5.2
Figure 5.5
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