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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.
*
These dimensions are furnished approximately
1
/4 in. (6mm) undersize, except round and oval dimensions which are approximately
1
/8 in. (3mm) undersize.
T
s
= (2)(Sleeve Thickness)
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.
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 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
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.
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.
The basis of design is Greenheck Model FSD-311V.
Specifications
D* +
2 in. (51mm) +T
s
D*
TYPE R
16 in. (406mm)
Min.
2
1
/
8
in.
D* + 2 in. (51mm)+T
s
TYPE O
W
*
H*
W*
+ 2 in. (51mm)+T
s
H* + 2 in. (51mm)+T
s
W*
H*
TYPE C
H* + 2 in. (51mm)+T
s
(54mm)
16 in. (406mm)
Min.
2
1
/
8
in.
(54mm)
16 in. (406mm)
Min.
W* + 2 in. (51mm)+T
s
(54mm)
2
1
/
8
in.
Copyright ©2007 Greenheck Fan Corporation
FSD-311V Rev. 3 June 2007