model OFSd-211
Out Of Wall Combination FIRe SmOKe dAmPeRS
Steel 3V Blades
APPLICATION
UL 555S Leakage Class I
UL555 11⁄2 Hour Fire Resistance Rating
Horizontal or Vertical Mount
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.
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
Ratings
IBC International Building Codes
ICBO uniform Building Codes
UL555 Fire Resistance Rating:
Fire Rating:
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity:
Max. Pressure:
11⁄2 hours in walls
CSFm California State Fire marshal
Fire Damper Listing (#3225-0981:103)
Leakage (Smoke) Damper Listing (#3230-0981:104)
2000 fpm (10.2 m/s)
4 in. wg (1 kPa) - differential
pressure
UL555S Leakage Rating:
New York City (MEA listing #260-91-M)
Leakage Class:
Operational Rating:
Max. Velocity:
I
Actual ratings are size dependent
2000 fpm (10.2m/s)
“uL CLASSIFIed (see complete marking on
product)”
Max. Pressure:
4 in. wg (1 kPa)
350ºF (177ºC)- depending upon the
actuator
“uL CLASSIFIed to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
Max. Temperature:
STANdARd CONSTRuCTION
Frame:
5 in. x 1 in. (127mm x 25mm)
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.
galvanized steel hat channel with
reinforced corners. A low profile
head and sill are used on sizes less
than 17 in. (432mm) high.
R
Blades:
16 ga. (1.5mm) galvanized steel,
reinforced with 3 longitudinal
structurally designed vee's.
Extruded silicone rubber blade seals.
Flexible stainless steel jamb seals.
Concealed in jamb
Seals:
Linkage:
Closure device:
Axles:
Bearings:
Sleeve:
UL listed 165°F (74ºC) RRL
½ in. (13mm) dia. plated steel
Bronze sleeve type
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
* 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)
• Momentary switch
• Security bars
• Sealed transition and sleeves
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AmCA 5.2 Pressure drop
OFSd-211
5D
ꢀ
* This size is based on multi-section unit.
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
(in. wg)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
(in. wg)
(in. wg)
(in. wg)
(in. wg)
500
1000
1500
2000
2500
3000
3500
0.04
0.14
0.31
0.55
0.86
1.24
1.69
500
1000
1500
2000
2500
3000
3500
0.02
0.07
0.16
0.29
0.45
0.65
0.89
500
0.01
0.04
0.09
0.16
0.25
0.36
0.49
500
0.01
0.06
0.13
0.23
0.36
0.52
0.70
500
0.03
0.10
0.23
0.41
0.63
0.91
1.24
1000
1500
2000
2500
3000
3500
1000
1500
2000
2500
3000
3500
1000
1500
2000
2500
3000
3500
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.
R
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AmCA 5.3 Pressure drop
OFSd-211
5D
6D
* This size is based on multi-section unit.
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
500
1000
1500
2000
2500
3000
3500
0.02
0.09
0.20
0.36
0.56
0.81
1.10
500
1000
1500
2000
2500
3000
3500
0.01
0.04
0.09
0.16
0.25
0.35
0.48
500
1000
1500
2000
2500
3000
3500
0.01
0.03
0.06
0.11
0.17
0.24
0.33
500
1000
1500
2000
2500
3000
3500
0.01
0.04
0.10
0.17
0.27
0.39
0.53
500
1000
1500
2000
2500
3000
3500
0.02
0.07
0.16
0.29
0.45
0.64
0.88
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.
R
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AmCA 5.5 Pressure drop
OFSd-211
* This size is based on multi-section unit.
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
500
1000
1500
2000
2500
3000
3500
0.04
0.17
0.38
0.67
1.04
1.50
2.05
500
1000
1500
2000
2500
3000
3500
0.06
0.22
0.50
0.89
1.39
2.00
2.72
500
1000
1500
2000
2500
3000
3500
0.03
0.14
0.31
0.54
0.85
1.22
1.66
500
1000
1500
2000
2500
3000
3500
0.03
0.12
0.26
0.46
0.73
1.05
1.42
500
1000
1500
2000
2500
3000
3500
0.03
0.13
0.30
0.53
0.83
1.19
1.62
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.
R
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Application data
OFSd-211
Actuator Space envelopes
The drawing below and corresponding table show the minimum dimensions
required for internal actuator mounting on OFSD-211s. The standard mounting
locations provide enough space for the mounting of actuators and controls plus
allowing space for a grille and duct connection (see Sleeve Length below).
Factory supplied thermal
blanket around sleeve
Honeywell
Actuator Space
mL-4XXX series mS4120 series
mS4XXX series
envelopes
X
Grille
(Supplied by
others)
'X' dimension
5.88 in. (149mm)
12 in. (305mm)
12 in. (305mm)
5.88 in. (149mm)
12 in. (305mm)
12 in. (305mm)
minimum Width
minimum Height
Sleeve Information
‘Sleeve Length’ = depth of Grille (or Register)
+ X (Actuator: see table above)
Combination Fire
Smoke Damper
"
1
7
⁄
2
5 in.
+ 5 in. [127mm] (Damper Width)
Max.
Fire rated barrier
A
+ 1.25 in. [31.8mm] (for duct connection)
(round up to nearest length: 14 in., 16 in., 18 in.,
or 20 in. [356, 406, 457, or 508mm])
Sleeve Length
‘Sleeve Gauge’ = 16 Ga. or 20 Ga. (1.5mm or 1mm)
Wall Opening Sizing
Fire Smoke Damper
With Sleeve And
Thermal Blanket
To accommodate for sleeve and thermal blanket thickness,
the wall opening must be oversized by 3⁄8 in. (9.5mm) as
shown. For example, if the nominal damper size required
is 18 in. x 14 in. (457mm x 356mm), the wall opening size
needs to be 18 3⁄8 in. x 14 3⁄8 in. (467mm x 365mm). The
damper itself is undersized 1⁄4 in. (6mm) on each dimension
for an actual damper size of 17 3⁄4 in. x 13 3⁄4 in. (451mm x
349mm). This is also the inside dimensions of the sleeve (for
grille considerations).
Wall
Nominal
Damper
Height + 3/8 in.
Nominal Damper
Width + 3
8 in.
/
Specifications
Combination Fire Smoke Dampers meeting the following specifica-
tions shall be furnished and installed where shown on plans and/or
as described in schedules. Dampers shall meet the requirements of
NFPA 80, 90A, 92A, 92B, 101 & 105 and further shall be tested, rated
and labeled in accordance with the latest edition of UL Standards 555
and 555S. Dampers shall have a UL555 fire rating of 1½ hours and
be of low leakage design qualified to UL 555S Leakage Class I.
against leakage as pressure on either side of the damper increases.
Jamb seals shall be stainless steel compression type. Blades shall be
completely symmetrical relative to their axle pivot point, presenting
identical resistance to airflow in either direction or pressure on either
side of the damper. Each damper shall be supplied with a factory
mounted sleeve; sleeve shall be wrapped with UL approved thermal
barrier material.
Each damper/actuator combination shall have a UL555S elevated
temperature rating of 250°F (121°C) minimum and shall be operational
and dynamic rated to operate at maximum design air flow at its
installed location. Each damper shall be supplied with an appropriate
actuator installed by the damper manufacturer at the time of damper
fabrication. Damper actuator shall be (specifier select one of the
following) electric type for 120 (24 or 230) volt operation.
The Damper Manufacturer's submittal data shall certify all air perfor-
mance pressure drop data is licensed in accordance with the AMCA
Certified Ratings Program for Test Figures 5.2, 5.3, and 5.5. Damper
air performance data shall be developed in accordance with the lat-
est edition of AMCA Standard 500-D. Dampers shall be labeled with
the AMCA Air Performance Seal.
Damper must be rated for mounting vertically (with blades running
horizontal) or horizontally and be UL 555S rated for leakage and
airflow in either direction through the damper. Each damper shall be
supplied with a 165°F (74°C) RRL.
Damper blades shall be 16 ga. (1.5mm) galvanized steel 3V type with
three longitudinal grooves for reinforcement. Damper frame shall
be galvanized steel formed into a structural hat channel shape with
reinforced corners. Bearings shall be sintered bronze sleeve type
rotating in extruded holes in the damper frame. Blade edge seals
shall be silicone rubber designed to inflate and provide a tighter seal
The basis of design is Greenheck Model OFSD-211.
Copyright ©2006 Greenheck Fan Corporation
OFSD-211 Rev 3 June 2006
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