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Inserting Dampers Into Wall/Floor Openings
Figures 5 and 6 shows two approved installations for out of wall/floor dampers:
1) Through the grille access and
2) Installation in continuing duct
In both installation methods the damper shall not be mounted more than 3
the wall/floor. The actuator and damper can be accessed and serviced by removing the grille and the actuator
compartment panel. To provide access to the damper actuator for continuing ductwork, refer to the requirements of
NFPA 90A.
Factory Supplied
Thermal Blanket
Combination fire
smoke damper
Figure 6: Continuing Duct -
Horizontal or Vertical Mount
®
Combination Fire
Smoke Damper
Thermal Blanket
3 1/2 in.
Max.
Figure 5: Through the Grille - Duct Terminates
3 1/2 in.
Max.
Masonry
floor
⁄
in. (89 mm) outside the plane of
1
2
3/4 in. 14 ga.
Flange
#10 2 in. long sheet metal
screws spaced 6 in. on
center and maximum of 2 in.
from the corners, (minimum
of 2 screws per side),
through the sleeve into the
header, sill and jamb framing
members. Screw into rear
portion of the studs so as to
avoid space conflicts with
grille assembly.
Grille
(supplied
by others)
Actuator
Compartment
Figure 7: GFSD front view
Electrical Access
Panel
GFSD Series
5
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