Greenheck DFD Series Installation, Operation And Maintenance Manual page 8

Damper Sleeve
#10 sheet metal screws, 2
1/2 inches long, spaced 6
in. on center and a
maximum of 2 in. from the
corners (minimum of 2
screws per side). Screw
into studs so as to avoid
space conflicts with the
grille.
Angle Fastener
Retaining Angle
Grille (supplied by others)
Figure 12: Wood Stud - Grille
1/4 in. minimum
total clearance
Wall or Floor
Maximum
Maximum
6 in.
6 in.
Duct
Damper
Retaining Angles
Type A
Factory or Field installed Sleeve
Wall or Floor
Duct
Type B
On types R, CO & CR factory
furnished duct collar
qualifies as breakaway
Wall or Floor
connection.
Wall or floor
Type B2
Factory Sleeve
Duct
Type C, CO, CR, & R
8 Curtain Fire Dampers
2 1/2 in. minimum
Stud or Runner
Two layers of 1/2 in. UL
Classified Gypsum
Wallboard for 2 hour
rated walls. One layer for
1 hour rated walls (see
UL Rated Wall Design for
Additional Details).
1/4 in. minimum
total clearance
(See Section 1)
Max. 6 in.
Maximum
6 in.
Max. 6 in. Damper
Duct
Retaining Angles
Factory Sleeve
(See Section 4)
Damper
Damper
Retaining angle leg
shall not exceed 7 in.
(178mm)
Sleeve
Field Installed Sleeve
Figure 14: Damper/Sleeves with Transition
On types R & CR factory
furnished duct collar
qualifies as breakaway
Damper
connection (See Connecting
Ducts to Fire Damper Sleeve)
Damper
Sleeve
#10 sheet metal screws
spaced 6 in. on center
and a maximum of 2 in.
from the corners
(minimum of 2 screws per
side). Screw into studs so
as to avoid space
conflicts with the grille
Angle Fastener
Grille (supplied
by others)
Figure 13: Metal Stud - Grille
Retaining Angles
Wall or floor
Maximum
6 in.
"K" side
Wall or
Floor
Damper
Sleeve
Duct
Type B
Sleeve
(See Sleeve Requirements)
Type A
Wall or floor
Damper
Sleeve
Damper
Type B2
Sleeve
Duct
Type B
Wall or floor
Damper
Duct
Damper
Retaining Angles
Type A
1/4 in. minimum
total clearance
Wall or Floor
(See Section 1)
Stud or Runner
Two layers of 1/2 in.
UL Classified Gypsum
Wallboard for 2 hour
rated walls. One layer
for 1 hour rated walls
(see UL Rated Wall
Design for Additional
Maximum
Details).
6 in.
Retaining Angle/Flange
Duct
Type B
On types R, CO & CR factory
Duct
furnished duct collar
qualifies as breakaway
Retaining Angles
Wall or Floor
connection.
(See Section 4)
Type A
Retaining angle leg
1 in. min.
shall not exceed 7 in.
overlap
(178mm)
Four sides
Mounting Angles
(See Para. 4)
1/4 in. minimum
total clearance
Duct
(See Para. 1)
Type C, CO, CR, & R
Factory Sleeve
Type B
On types R & CR factory
furnished duct collar
qualifies as breakaway
connection (See Connecting
Ducts to Fire Damper Sleeve)
Wall or floor
Duct
Type C, CO, CR & R
Field installed Sleeve
Damper
Wall or floor
Maximum
6 in.
Damper
Sleeve
(See Sleeve Requirements)
Wall or floor
Sleeve
Damper
Damper
Duct
Wall or floor
Damper
Sleeve
®