model Fsd-311V
Combination FIRe smOKe dAmPeRs
Steel Airfoil Blades
UL 555S Leakage Class I
UL555 1 1/2 Hour Fire Resistance Rating
APPLICATION
Model FSD-311V is a vertical blade class I leakage rated combi-
nation fire smoke damper. High strength airfoil blades ensure the
lowest resistance to airflow in HVAC systems with velocities to 4000
fpm (20.3m/s) and 4 in. wg (1.0 kPa).
Model FSD-311V meets the requirements for fire
dampers, smoke dampers and combination fire
smoke dampers established by:
RATINgs
National Fire Protection Association
NFPA Standards 80, 90A, 92A, 92B, 101 & 105
IBC International Building Codes
ICBO uniform Building Codes
UL 555 Fire Resistance Rating:
Fire Rating:
1½ hours
Dynamic Closure Rating: Actual ratings are size dependent
Max. Velocity:
Max. Pressure:
up to 4000 fpm (20.3 m/s)
4 in. wg (1 kPa)
CsFm California state Fire marshal
Fire Damper Listing (#3225-0981:103)
Leakage (Smoke) Damper Listing (#3230-0981:104)
UL555S Leakage Rating:
Leakage Class:
I
New York City (MEA listing #260-91-M)
Operational Rating:
Max. Velocity:
Max. Pressure:
Actual ratings are size dependent
up to 4000 fpm (20.3m/s)
4 in. wg (1 kPa)
Maximum Temperature: 350°F (177°C)- depending upon
“uL CLAssIFIed (see complete marking on
product)”
“uL CLAssIFIed to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
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 to
maximize free area and
performance.
Blades:
seals:
Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2 mm) equivalent thickness.
Extruded silicone rubber blade
seals. Flexible stainless steel jamb
seals.
W*
Closure device:
Linkage:
Axles:
Bearings:
RRL 165°F (74°C)
Concealed in jamb.
1/2 in. (13mm) dia. plated steel.
304 stainless steel
sIze LImITATIONs:
minimum size:
6 in. W x 8 in. H
(152mm W x 203mm H)
maximum size-
Single Section:
H*
50 in. W x 32 in.H
(1270mm W x 813mm H)
100 in. W x 32 in. H
(2540mm W x 813mm H)
Multiple Section:
OPTIONAL FeATuRes
• OCI (Open closed indication switches)
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Transitions (R, C, O)
• POC retaining angles
• Momentary Switch
• Sealed transitions and sleeves
*W&H dimensions furnished approximately 1/4 in. (6mm) undersize.
• RRL/OCI (Open closed indication switches)
• 165ºF (74°C), 212ºF (100°C), 250ºF (121°C), 350ºF (177°C) RRL's
available
• TOR (remote override closure allows damper to perform smoke
management functions during a fire emergency.)
• PRV (pneumatic relief valve)
• Security Bars
• Sealed transitions and sleeves
Installation instructions available at www.greenheck.com
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AmCA 5.2 Pressure drop
Fsd-311V
5D
12x12
24x24
* Sizes are in inches.
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
1000
1500
2000
2500
3000
3500
4000
1000
1500
2000
2500
3000
3500
4000
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AmCA 5.3 Pressure drop
Fsd-311V
5D
6D
24x24
12x12
* Sizes are in inches.
Pressure Drop
Pressure Drop
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
1000
1500
2000
2500
3000
3500
4000
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AmCA 5.5 Pressure drop
Fsd-311V
4
24x2
12x12
* Sizes are in inches.
Velocity
(fpm)
Pressure Drop
(in. wg)
Velocity
(fpm)
Pressure Drop
(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
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Transitioned damper dimensions
When a combination fire smoke damper is being used in conjunction with round or oval ductwork, the FSD-311V can be
supplied in a factory sleeve with round or oval transitions on both ends of the sleeve. Dampers should be ordered to the duct
dimensions. Drawings below show overall damper size.
D*+
2 in. (51mm) +T
s
W*+ 2 in. (51mm)+T
s
W*+ 2 in. (51mm)+T
s
D*+ 2 in. (51mm)+T
s
H*+ 2 in. (51mm)+T
H*+ 2 in. (51mm)+T
s
s
H*
H*
21/8in.
21/8in.
(54mm)
21/8in.
(54mm)
(54mm)
*
W
W*
D*
16 in. (406mm)
Min.
16 in. (406mm)
Min.
16 in. (406mm)
Min.
TYPE R
TYPE O
TYPE C
These dimensions are furnished approximately 1/4 in. (6mm) undersize, except round and oval dimensions which are approximately 1/8 in. (3mm) undersize.
*
T
= (2)(Sleeve Thickness)
s
specifications
Combination Fire Smoke Dampers meeting the following
specifications 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.
reinforced corners. Bearings shall be 304 stainless steel 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/actuator combination shall have a UL555S elevated
temperature rating of 250°F (121º C) minimum and shall be 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 (or 24) Volt operation or pneumatic type for 25 psi minimum
(30 psi maximum) operation.
Damper must be rated for mounting vertically (with blades running
vertical) and be UL 555S rated for leakage and airflow in either
direction through the damper. Each damper shall be supplied with
165°F (74°C) RRL.
The Damper manufacturer's submittal data shall certify all air
performance pressure drop data is tested 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 latest edition of AMCA Standard 500-D.
Damper blades shall be of the double skin airfoil type and shall have
an equivalent metal thickness of 14 ga. (2mm). Damper frame shall
be galvanized steel formed into a structural hat channel shape with
The basis of design is Greenheck Model FSD-311V.
Copyright ©2007 Greenheck Fan Corporation
FSD-311V Rev. 3 June 2007
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