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
1
⁄
2
hours in walls
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
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
model OFSd-211
Out Of Wall Combination
FIRe SmOKe dAmPeRS
Steel 3V 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
)
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)
R
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 Pro-
grams. The AMCA Certified Ratings Seal applies to
air performance ratings only.
Installation instructions available at www.greenheck.com
