Part Number 462721
DFDR-XXX, ssDFDR-XXX,
FDR-XXX, and ssFDR-XXX MoDels
11⁄2 Hour Round Fire Dampers
Vertical and Horizontal Mount
Installation, Operation and Maintenance Instructions
DFDR-XXX, SSDFDR-XXX, FDR-XXX, and SSFDR-XXX
Model Dampers are intended for installation in accordance
with fire damper requirements established by:
National Fire Protection association
NFPA Standards 80, 90A, & 101
BoCa National Building Codes
ICBo Uniform Building Codes
IBC International Building Codes
sBCCI standard Building Codes
New york City (MEA listing #260-91-M)
“Ul ClassIFIeD (see complete marking on product)”
“Ul ClassIFIeD to Canadian safety standards (see
complete marking on product)”
UL Standard 555 (Classification #R13317)
saFety WaRNING:
ReCeIVING aND HaNDlING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death. Read the installation,
operating, and maintenance instructions thoroughly
before installing or servicing this equipment.
Upon receiving dampers, check for both obvious
and hidden damage. If damage is found, record all
necessary information on the bill of lading and file
a claim with the final carrier. Check to be sure that
all parts of the shipment, including accessories, are
accounted for.
Dampers must be kept dry and clean. Indoor storage
and protection from dirt, dust and the weather is highly
recommended. Do not store at temperatures in excess
of 100°F (37°C).
WaRRaNty
Greenheck warrants this equipment to be free from
defects in material and workmanship for a period of one
year from the purchase date. Any units or parts which
prove to be defective during the warranty period will
be repaired or replaced at our option. Greenheck shall
not be liable for damages resulting from misapplication
or misuse of its products. Greenheck will not be
responsible for any installation or removal costs.
Greenheck will not be responsible for any service work
or backcharges without prior written authorization.
INstallatIoN sUPPleMeNts
Refer to the appropriate Greenheck installation
supplements for special rquirements:
• Steel Deck Supplement
Due to continuing research, Greenheck reserves the right to change specifications without notice.
This manual is the property of the owner, and is required for future maintenance. Please leave it with the owner when
the job is complete.
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Installation - Continued
• Place the damper and attached retainer plate into the
wall/floor opening.
2.sleeVe leNGtH aND Wall/FlooR
tHICKNess
• If a second retaining plate is being used, secure it on
the opposite side of the wall/floor
Insert the damper assembly into the prepared opening,
to appropriate depth (see page 2, Fig. 1).
Do Not PosItIoN RetaINeR Plate(s) IN
FRaMe GRooVe
Recommended maximum and minimum insertion depth
C
can be exceeded as long as the
of the damper
L
blade remains within the plane of the wall/floor.
•
Verify position, blade orientation, and actuator
clearance then tighten the retainer plate clamping
screws. The retainer plate(s) must overlap the wall/
floor opening a minimum of 1 inch (25mm). Secure
the retainer plate(s) to the wall using appropriate
fasteners (minimum #8 sheet metal screws) at the
four corners of each retainer plate when two retainer
plates are used and also within 3 in. (19mm) of the
center of each plate when one retainer plate is used.
IMPoRtaNt saFety DaNGeR! To avoid causing
death or serious bodily harm to building occupants, do
not insert screws into the damper frame unless used
for duct connection within 2 in. (51mm) of the frame
end.
The sleeve may extend a maximum of 6 in. (152mm)
beyond both sides of the wall or floor. Recommended
standard sleeve lengths for various wall/floor
thicknesses are:
Opening + 2 in. Min.
Fig. 2
Wall/Floor Thickness
Dimension (Tw)
Inches (mm)
Sleeve Length
Dimension (L)
Inches (mm)
Up to 61 2-65)
61 2 81 2-65 2 5-6)
81 2 -01 25-6 2 567)
-3 5/8 2346)
-5 5/8 2397)
-7 5/8 2448)
Wall/Floor Opening
= Nominal Size + 7/8 in. Min.
Clamping
Screw
Nut
1.00 in. Typ.
Fasteners
3.DUCt to sleeVe CoNNeCtIoNs
Dampers are supplied with sleeves from the factory
and can be installed without the need for additional
field installed sleeves.
Retaining
Gauge of factory furnished sleeve determines the
Plate Assembly
type of duct to sleeve connections required (see table
below). Any duct connection other than the breakaway
connections are considered rigid.
Clamping Screw
Sleeve Gauge
(mm)
Duct Dimension
Maximum
Inches (mm)
Type of Duct to
Sleeve Connection
Permitted
5.Recommended Preparation of openings in
Wood and Metal stud Walls
• Frame wall openings as shown below. (see Fig. 3)
• Double vertical studs are not required for openings
36 in. x 36 in. (914mm x 914mm) or smaller.
• Gypsum wall board must be fastened 12 in. (305mm)
on center to all stud and runner flanges surrounding
opening. (see Fig. 4)
-0 ga. 23.5)
-4 ga. 25)
54 26-0)
Rigid or Breakaway
-6 ga. 2-.5)
50 ga. 2-mm)
54 26-0)
Breakaway only
Sleeve thickness must not be less than the gauge of the
connecting duct.
• All construction and fasteners must meet the
requirements of the appropriate wall design (See UL
UL Standard 555 requires all ducts to terminate at fire damper
sleeves.
Fire Resistance Directory) and/or local codes.
DAMPER FRAME
Fig. 3
4.seCURING tHe DaMPeR/sleeVe asseMBly
to Wall aND FlooR oPeNINGs
METAL
STUD
1.00
MIN
Damper assemblies must be installed in wall/floor
openings using a single retaining plate on either side
of the wall/floor or by using a retaining plate on both
sides of the wall/floor. The use of a second retaining
plate is allowed, but is not necessary. A single retaining
plate is provided with the dampers. A second retaining
plate can be ordered as an option.
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
DAMPER FRAME
• The retaining plate(s) will open up for easy installation
when the clamping screw is loosened. If necessary,
remove the clamping screw and nut (see Fig. 2).
WOOD
STUD
1.00
MIN
(IMPORTANT: The clamping mechanism should
face away from the wall/floor). Retainer plate(s) are
designed to mount flush to the wall/floor and hold the
damper in the wall/floor opening.
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
3
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6.Round Duct Connections
Round duct connections shall be attached
with #8 sheet metal screws as follows:
• Ducts 22 in. (559mm) dia. and smaller shall have three
screws.
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• Ducts larger than 22 in. (559mm) dia. and up to
including 24 in. dia. shall have five screws.
Note: All breakaway connections described may
have duct sealant, PA2084T Duct Sealant Adhesive
manufactured by Precision or DP1010 Water Base Duct
Sealant manufactured by Design Polymetrics, applied
in accordance with SMACNA recommendations.
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Fig. 4
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DFDR-XXX Blade orientation
30°
Axle
Axle
30°
Axle
30° Off Horizontal
(Maximum)
30° Off Horizontal
(Maximum)
Normal
Damper Maintenance
Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary, use mild
detergents or solvents. If lubrication is desired for components such as axle bearings, do not use oil-based lubricants
or any other lubricants that attract contaminants such as dust.
Dampers must be maintained, cycled, and tested at intervals not less than every six months and in accordance with the
latest editions of NFPA 90A & 92A, UL864 and local codes.
Damper troubleshooting
The following is a possible cause and correction list for common concerns with the dampers.
Symptom
Possible Cause
Corrective Action
Frame is out of round causing blades to
interfere with frame
Adjust frame such that it is round
Damper does not fully open and/or fully
close
Screws interfere with blade
Contaminants on damper
Locate screws and remove
Clean with a non2oil based solvent 2see
Damper Maintenance)
Link separated
Heat
Replace link
Copyright © 2006 Greenheck Fan Corporation
462721 DFDR-XXX FS Rev. 4 December 2006
4
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