Round Fire and Combination Fire Smoke Dampers
5
Retainer Plate
Duct Connection
Area
2 in.
AIRFLOW
6 in. max.
TW
Sleeve Length
6 in. max.
Do not place retainer
plate in this groove
2 in.
Duct connection
area
Clearance for expansion
Retainer plate
Blade latch
Access door to be on
same side as blade latch
Figure 6: DFDR/FDR/SEDFDR/SSDFDR/SSFDR
3.375 IN.
FUSIBLE
LINK
LOCATION
CLEARANCE FOR
EXPANSION
TOP VIEW OF DAMPER
6 IN. MAX
SLEEVE LENGTH
TW
DUCT
CONNECTION
AREA
AIRFLOW
1.50 IN.
ACTUATOR
16.00 IN MAX
OPTIONAL BLADE POSITION
INDICATOR AND/OR ELECTRIC
LINK.
DUCT
CONNECTION
AREA
2.00 IN.
1.50 IN.
Optional
Second
Retaining
Plate
Do not place retainer
plate in this groove
Figure 5: FSDR/SEFSDR/SSFSDR
Inserting Damper into Wall/Floor Openings
Insert the damper assembly into the prepared opening, to appropriate depth (see
Figure 5 & 6
).
Special attention must be paid to ensure the following:
1) The
CL
(centerline) of the damper frame remains within the plane of
the wall or floor
2) The sleeve does not extend more than 16 in. (406mm) beyond the wall or floor on the actuator side of the
damper and 6 in. (152mm) on the side opposite the actuator. The sleeve may also extend up to 16 in. (406mm)
beyond the wall or floor if the damper has an access door.
