Inserting Damper Into Wall/Floor Openings - Greenheck DFD Series Installation, Operation And Maintenance Manual

Inserting Damper into Wall/Floor Openings

Insert the sleeved damper assembly into the prepared opening. Refer to label on outside of sleeve for the
recommended location of the damper in the wall or floor (see Dimension A and Detail 1, Figure 8).
Special attention must be paid to ensure the following:
1) The (centerline) of the damper frame remains within the plane of the wall or floor
C L
2) Attachments made through the retaining angle do not penetrate the 'No Screw' area designated on the
damper sleeve.
3) 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 a factory supplied access door.
Most fire and combination fire smoke dampers come with factory supplied sleeves. For field supplied sleeves, see
the Field Supplied Sleeves supplement at www.greenheck.com. The following are recommended sleeve lengths for
various wall thicknesses:
6 Multi-Blade Fire and Combination Fire Smoke Dampers
Optional blade indicator
and/or electric link.
Airflow
Access door required on
jackshaft side of damper.
Refer to the latest edition
Jackshaft
of NFPA 90A.
Actuator
'A' Dim.
(Distance from
end of sleeve to
Damper
face of damper)
Sleeve
16 in. max.
Sleeve Length (L)
Figure 8: Properly Installed Combination fire smoke damper
Wall Thickness
Dimension (T W )
4 - 6 in.
(102mm - 152mm)
7 - 10 in.
(178mm - 254mm)
11 - 13 in.
(279mm - 330mm)
Clearance for expansion
(1/4 in. min., 1 1/2 in. max.)
Retaining Angles
(see Section 4)
LINE OF WALL
DO NOT INSTALL SCREW S
BETWEEN THESE LINES
AROUND ENTIRE DAMPER
C L
6 in. max.
T w
Recommended
Sleeve Length
Dimension (L)
16 in.
(406mm)
21 in.
(533mm)
24 in.
(610mm)
Line of Wall
DO NOT INSTALL SCREWS
BETWEEN THESE LINES
AROUND ENTIRE DAMPER
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Detail 1