Model OFSD-311
Out of Wall Combination Fire Smoke Dampers
Application
Steel Airfoil Blades
UL 555S Leakage Class I
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.
UL555 11⁄2 Hour Fire Resistance Rating
Horizontal or Vertical Mount
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
Ratings
iBC international Building Codes
iCBO uniform Building Codes
UL555 Fire Resistance Rating:
Fire Rating:
11⁄2 hours in walls
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)
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity:
Max. Pressure:
UL555S Leakage Rating:
Leakage Class:
up to 3000 fpm (15.2 m/s)
4 in. wg (1 kPa) - differential pressure
I
Operational Rating:
Max. Velocity:
Max. Pressure:
Max. Temperature:
Actual ratings are size dependent
up to 3000 fpm (15.2m/s)
4 in. wg (1 kPa)
“uL CLASSiFieD (see complete marking on
product)”
“uL CLASSiFieD to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
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.
Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2mm) equivalent thickness.
Extruded silicone rubber blade seals.
Flexible stainless steel jamb seals.
Concealed in jamb
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.
Blades:
Seals:
R
Linkage:
Closure Device:
Axles:
Bearings:
Sleeve:
RRL 165°F (74ºC)
1⁄2 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:
32 in. W x 30 in. H
(813mm W x 762mm H)
36 in.W x 36 in.H
(914mm x 914mm)
Multiple Section:
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
* 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
• PRV (pneumatic relief valve)
• Security bars
•Sealed transition and sleeves
AMCA 5.2 pressure Drop
OFSD-311
5D
*
36x36
12x48
48x12
12x12
24x24
* Sizes are in inches.
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
500
0.03
0.12
0.26
0.46
0.72
1.04
1.41
1.84
500
0.01
0.06
0.12
0.22
0.34
0.49
0.67
0.87
500
0.01
0.06
0.12
0.22
0.34
0.49
0.67
0.88
500
0.01
0.05
0.12
0.21
0.33
0.48
0.65
0.85
500
1000
1500
2000
2500
3000
3500
4000
0.02
0.08
0.18
0.33
0.51
0.74
1.00
1.31
1000
1500
2000
2500
3000
3500
4000
1000
1500
2000
2500
3000
3500
4000
1000
1500
2000
2500
3000
3500
4000
1000
1500
2000
2500
3000
3500
4000
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.
R
AMCA 5.3 pressure Drop
OFSD-311
5D
6D
*
24x24
12x12
36x36
48x12
12x48
* Sizes are in inches.
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
4000
0.01
0.06
0.13
0.23
0.37
0.53
0.73
0.95
500
0.01
0.02
0.06
0.10
0.16
0.23
0.32
0.42
500
1000
1500
2000
2500
3000
3500
4000
0.01
0.02
0.05
0.09
0.14
0.21
0.29
0.38
500
1000
1500
2000
2500
3000
3500
4000
0.01
0.02
0.06
0.10
0.16
0.24
0.33
0.43
500
0.01
0.04
0.10
0.18
0.29
0.42
0.57
0.74
1000
1500
2000
2500
3000
3500
4000
1000
1500
2000
2500
3000
3500
4000
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.
R
AMCA 5.5 pressure Drop
OFSD-311
*
36x36
48x12
12x12
12x48
24x24
* Sizes are in inches.
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(in. wg)
(in. wg)
500
1000
1500
2000
2500
3000
3500
4000
0.04
0.18
0.42
0.75
1.17
1.68
2.29
2.09
500
1000
1500
2000
2500
3000
3500
4000
0.03
0.13
0.29
0.52
0.81
1.17
1.60
2.14
500
1000
1500
2000
2500
3000
3500
4000
0.03
0.12
0.27
0.48
0.75
1.08
1.48
1.93
500
1000
1500
2000
2500
3000
3500
4000
0.03
0.12
0.27
0.49
0.77
1.11
1.51
1.97
500
1000
1500
2000
2500
3000
3500
4000
0.03
0.14
0.32
0.57
0.89
1.28
1.75
2.29
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.
R
AppLiCAtiOn DAtA
OFSD-311
Actuator Space envelopes
The drawing below and corresponding table show the minimum dimensions
required for internal actuator mounting on OFSD-311s. 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).
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Honeywell
Actuator Space
envelopes
9
ML-4XXX series
MS4XXX series
MS-4120 series
‘X’ Dimension
5.88 in.(149mm) 5.88 in. (149mm)
Minimum Width
Minimum Height 12 in. (305mm)
12 in. (305mm)
12 in. (305mm)
12 in. (305mm)
Sleeve information
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‘Sleeve Length’ = Depth of Grille (or Register)
+ X (Actuator: see table above)
+ 5 in. [127mm] (Damper Width)
+ 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, 508mm])
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‘Sleeve Gauge’ = 16 Ga. or 20 Ga. (1.5mm or 1mm)
Wall Opening Sizing
To accommodate for sleeve and thermal blanket thickness,
Fire Smoke Damper
With Sleeve And
Thermal Blanket
3
the wall opening must be oversized by ⁄8 in. (9.5mm) as
Wall
shown. For example, if the nominal damper size required
is 18 in. x 14 in. (457mm x 356mm), the wall opening size
3
3
needs to be 18 ⁄8 in. x 14 ⁄8 in. (467mm x 365mm). The
1
damper itself is undersized ⁄4 in. (6mm) on each dimension
3
3
for an actual damper size of 17 ⁄4 in. x 13 ⁄4 in. (451mm x
349mm). This is also the inside dimensions of the sleeve (for
grille considerations).
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.
Damper blades shall be of the double skin airfoil type and shall
have an equivalent thickness of 14 ga. (2mm) 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
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 UL qualified for mounting out of the plane of
the wall to allow ‘through the grille’ access to actuator and controls.
Each damper/actuator combination shall have a UL555S elevated
temperature rating of 250° F (121ºC) minimum and shall be opera-
tional 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 fol-
lowing) electric type for 120 (24 or 230) volt operation. Each damper
shall be UL555S rated for leakage and airflow in either direction
through the damper.
Each damper shall be supplied with a factory mounted sleeve; sleeve
shall be wrapped with UL approved thermal barrier material. Each
damper shall be supplied with a 165°F (74ºC) RRL.
The basis of design is Greenheck Model OFSD-311.
Copyright ©2006 Greenheck Fan Corporation
OFSD-311 Rev 3 June 2006
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