Copyright © 2017 Greenheck Corporation
FSD-212 Rev. 12 February 2017
When a combination fire smoke damper is being used in conjunction with round or oval ductwork, the FSD-212 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.
Ts = (2)(Sleeve Thickness)
D* + 2 in. (51mm) +Ts
D*
TYPE R
16 in.
(406mm)
Minimum
16 in.
(406mm)
Minimum
16 in.
(406mm)
Minimum
D* + 2 in. (51mm)+Ts
TYPE O
W*
H*
W*
+ 2 in. (51mm)+Ts
H* + 2 in. (51mm)+T
s
W*
H*
TYPE C
H* + 2 in. (51mm)+Ts
W* + 2 in. (51mm)+Ts
2 1/8 in.
(54mm)
2 1/8 in.
(54mm)
2 1/8 in.
(54mm)
Transitioned Damper Dimensions
FSD-212
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 II.
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 or pneumatic type for 25 psi minimum
(30 psi maximum) operation.
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 304SS 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.
The Damper Manufacturer's submittal data shall certify
all air performance 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 latest
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.
The basis of design is Greenheck Model FSD-212.
Specifications
