Part #453946

Installation, Operation and

Maintenance Instructions
FD and DFD 150X Series models are intended for
installation in accordance with fire damper requirements for FD & DFD 150X
established by:
National Fire Protection Association
MODELS
NFPA Standard 90A 1 1⁄2 Hour
BOCA National Building Codes Curtain Fire Dampers
ICBO Uniform Building Codes Vertical or Horizontal Mount
IBC International Building Codes
STI NG
SBCCI Standard Building Codes LI
OF
CALIFOR

NIA
STAT
CSFM California State Fire Marshal

STAT

L
FI

AL
Fire Damper Listing (#3225-0981:102) SE
RE
MARSH
RVI C E
1/4 in.
minimum total
clearance
New York City (BSA/MEA listing #260-91-M)

“UL CLASSIFIED (see complete marking on product)”

“UL CLASSIFIED to Canadian safety standards (see Wall or Floor
complete marking on product)”
UL Standard 555 (Listing #R13317) Maximum
6 in.
Maximum
6 in.

RECEIVING AND HANDLING

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. Duct
Damper

Dampers must be kept dry and clean. Indoor storage and protection from Retaining Angles
(See Section 3)
dirt, dust and the weather is highly recommended. Do not store at Type A
Wall or Floor
temperatures in excess of 100°F.

Damper
SAFETY WARNING:
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.

Duct
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.
Type B
Wall or Floor

WARRANTY On types R & CR factory

furnished duct collar
Greenheck warrants this equipment to be free from defects in material and qualifies as breakaway
connection.
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. Duct Damper

INSTALLATION SUPPLEMENTS Type C, CO, CR & R

Refer to the appropriate Greenheck installation supplements Figure 1: Type A, Type B, and Type C,
for special requirements: CO, CR, R damper installation
• Support Mullions diagrams.
• Shaftwall Supplement
• Drywall Supplement
• Grille Installation Supplement
Note: Refer to Greenheck IOM, Part #461335, for CFSD
models to be installed in corridor ceiling applications.

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 Table of Contents
Pre-Installation Guidelines........................................................................................................... .2
Installation......................................................................................................................................3-4
Breakaway Connections................................................................................................................5
Damper Maintenance.....................................................................................................................6
Damper Troubleshooting................................................................................................................6
Installation for Steel Stud Connection Option..............................................................................6-7

Pre-Installation Guidelines
The basic intent of a proper installation is to secure the fire damper in, not to, the opening in such a manner as
to prevent distortion and disruption of damper operation. This is accomplished by allowing the fire damper in
rated separation openings to expand and for the connecting duct to separate in the event of the collapse of the
hanging system. The following items will aid in completing the damper installation in a timely and effective
manner.

1. Check the schedules for proper damper locations within the building. Visually inspect the damper for damage
and verify that the fusible link is in place or has not separated. If fusible link is not present or has separated,
replace link. Never install a fire damper without the proper UL approved fusible link in place. (Fusible link is
standard control option. An electric link may have been provided.)
2. Lift or handle damper using sleeve or frame.
3. Install damper accordingly to comply with manufacturer’s appropriate UL procedure file number.
4. Damper must be installed into duct or opening square and free of twist or other misalignment. Damper must
not be squeezed or stretched into duct or opening.
5. Damper must be kept clean and protected from dirt, dust and other foreign materials prior to and after
installation. Examples of such foreign materials include, but are not limited to:
a. Mortar dust
b. Drywall dust
c. Firesafing materials
d. Wall texture
e. Paint overspray
6. Damper should be sufficiently covered as to prevent overspray of spray-on insulating, wall texturing, or spray
painting when performed within 5 feet of the damper. Excessive dirt or foreign material deposits can cause
damper to bind and not operate properly.
7. Caulking is not necessary, nor is it allowed, between the damper sleeve and the wall or floor opening (annular
space). However, caulking may be applied to the retaining angles.
8. ACCESS: Suitable access (such that fusible links can be changed) must be provided for damper inspection
and servicing. Where it is not possible to achieve sufficient size access, it will be necessary to install a
removable section of duct. (Refer to NFPA 90A).
9. The Code Authority Having Jurisdiction (AHJ) must evaluate and provide approval of final installation where
variations to these instructions are necessary.

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 Installation - Failure to follow these instructions will void all warranties.
These instructions apply to 1 1⁄2 hour rated fire dampers mounted in masonry, block or stud walls and concrete floors.
Specific requirements in these instructions are mandatory. These instructions meet the requirements of UL 555.
Installation shall comply with the requirements of NFPA 90A Standard for the Installation of Air Conditioning and
Ventilating Systems. U.L. listing R13317, California State Fire Marshal listings 3225-981:102, and New York City
BSA/MEA listing 260-91-M as they apply to these dampers.
1. NO ADDITIONAL SLEEVES ARE REQUIRED
The fire damper extended frame is an approved sleeve and can be properly installed without the need for a
supplemental field installed sleeve. Damper frame shall extend a maximum of 6 in. beyond the wall or floor
opening on each side.

2. CLEARANCES REQUIRED BETWEEN FIRE DAMPER SLEEVES AND WALL/FLOOR OPENINGS

Fire damper assemblies expand during periods of intense heat. Therefore, it is essential that openings in walls
or floors be larger than the fire damper assembly to allow for this expansion. Minimum clearances required
between the outside of fire damper sleeve assemblies and wall/floor openings are:
• Galvanized steel fire dampers and sleeves: 1/8 in. per linear foot of damper width and height with a minimum
clearance of 1/4 in. Recommended clearances, for width and/or height dimensions of:
1) 48 in. or less: 1/2 in. clearance
2) More than 48 in. and 96 in. or less: 1 in. clearance
3) More than 96 in.: 11/2 in. clearance
These are total clearances (ignoring fastener heads) and do not need to be equally spaced around the
damper. Refer to Section 3 and Figure 2 for additional installation considerations.

Example: A 12 in. x 12 in. damper would require a minimum clearance of 1/4 in.
A 48 in. x 12 in. damper would require a minimum clearance of 1/2 in. on width and 1/4 in. on height.
3. SECURING THE FIRE DAMPER TO WALL AND
FLOOR OPENINGS
Fire damper assemblies must be installed in wall and
floor openings using retaining angles on each side of the
wall or floor as described below:

• Retaining angles must be a minimum of 16 gauge

steel and have a minimum of 1 1⁄2 in. x 1 1⁄2 in. legs.

• Retaining angles must be attached to the damper

using one or more of the following methods of
Wall or
attachment: Floor
• tack or spot welds Min. 1 in.
Overlap*
Retaining
• #10 sheetmetal screws Angle Retaining
Angle
• 1/4 in. bolts and nuts Sleeve
• 3/16 in. steel pop rivets
Attachments must be spaced a maximum of 6 in. on
center and a maximum of 2 in. from corners. The angles 2 in
Duct
. Ma
must be attached to all 4 sides of the sleeve with butt x.

joints at each corner. A minimum of two attachments 6 in

. Ma Damper
x.
are required on each side, top and bottom. The angles
need not be attached to each other at the corners.
6 in
. Ma
x.
• Retaining angles must completely cover the
2 in
clearance space between the damper and the . Ma
x.
wall/floor opening, plus overlap the wall/floor a
minimum of 1 in. This coverage includes all corners
(see Figure 2). *only applicable for damper sizes above 36 in. x 36 in.
• Retaining angles should not be fastened to the
wall/floor material. The angles should only sandwich Figure 2: Retaining angle installation.
the wall/floor and allow for damper expansion during
periods of intense heat.

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 4. CONNECTING DUCTS TO THE FIRE DAMPER
All duct connections to FD & DFD 150X series
extended frame dampers must be “breakaway”
type connections. All connections shown on page 24 in. o.c. 24 in. o.c. Ceiling Runner
Maximum Maximum
6 are considered breakaway. Factory furnished (metal studs) (metal studs)

duct collars on types R & CR fire dampers are also

12 in.
considered breakaway (see Figure 1).

5. MULTIPLE SECTION FIRE DAMPERS

When multiple sections are shipped unassembled,

installer shall fasten dampers together as 24 in. o.c.
Maximum
described in Section 3. Table 1 shows maximum
sizes for multiple section damper.

2 in.
2 Panhead
Screws
2 in.

16 in. o.c. 16 in. o.c.

Damper Maximum Sizes Max Overall Size Maximum Maximum
for Single-Section for Multi-Section (wood studs) (wood studs)
Model Dampers Dampers
96 x 48
or Floor Runner
FD-150X (H or V) 48 x 48
120 x 40
72 x 48 Figure 3: Preparation detail for opening in stud wall.
DFD-150X (V) 36 x 36 or
60 x 60 Metal Stud Construction
DFD-150X (H) 30 x 30 48 x 36 Gypsum Wallboard

Note: V=Vertical Mount & H= Horizontal Mount

Table 1: Maximum sizes for single and multi-section

dampers.
Stud or Runner

Retaining
Angle
1 in. Min.

Damper
In metal stud construction,
Sleeve exposed steel surfaces need
not be covered with gypsum
Recommended Preparation of wallboard.
Openings in Wood and Metal Stud Figure 4: Detail of retaining angles and gypsum board
Walls application for metal and wooden stud construction.

Wooden Stud Construction

• Frame wall openings as shown in Figure 3.
• Double vertical studs are not required for openings 36 Gypsum Wallboard

in. x 36 in. or smaller.

• Gypsum wall board must be fastened 12 in. on center to
all stud and runner flanges surrounding opening (see Stud or Runner

Figure 4).
• All construction and fasteners must meet the
requirements of the appropriate wall design. (See UL Fire Retaining
Angle
Resistance Directory)
1 in. Min.

Damper In wood stud construction,

Sleeve gypsum wallboard must cover
all wood stud surfaces.
4

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 Breakaway Connections
Traditional Breakaway Style Transverse Joints

Transverse joints illustrated in Figure 5 have always

been approved as breakaway connections. SMACNA Plain “S” Slip Hemmed “S” Slip Double “S” Slip
testing has also approved the following variations as
breakaway connections.
• Standing “S” joints can be applied with #10
sheet metal screws (through joint and duct) subject
to the following limitations: Maximum 2 screws in
Inside Slip Joint Standing “S” Standing “S” (Alt.)
each side and in bottom joint.
• Transverse joints illustrated
can be applied as top and
bottom joints with Drive Slip - Drive Slip Joint
side joints in duct heights up to 20 in.
Round and Oval Duct Breakaway Connections Standing “S” (Alt.) Standing “S” Standing “S”
(Bar Reinforced) (Angle Reinforced)
Round or flat oval ducts connected to factory supplied Type
R, CR, or CO damper collars may use #10 sheet metal
Figure 5: Traditional breakaway style transverse joints.
screws as follows:
• Ducts 22 in. wide (or dia.) and smaller may use 3 NOTE: All breakaway connections described may have duct sealant, PA2084T
screws. duct sealant adhesive manufactured by Precision, applied in
• Ducts larger than 22 in. wide (or dia.) may use 5 screws. accordance with SMACNA recommendations.

Fire Damper Sleeve

Proprietary Flange System Breakaway Connections
6 in. long1/16in. max.
(Ductmate, Ward, Nexus) thickness plastic cleats;
12 in. c-c (min. 1 per side)

Flanged connection systems manufactured by Ductmate, Flanged system angles

Ward, and Nexus are approved as breakaway
connections when installed as illustrated in Figure 6.
(Attach per
manufacturer's
instructions)

Corners may be bolted

with 3/8 in. nuts and bolts

Neoprene gasket
between all angles

Duct

Figure 6: Detail of manufactured flanged system

breakaway connections.
(TDC by Lockformer, TDF by Engle)

TDC and TDF systems are approved as breakaway connections when installed as described in the SMACNA Duct
Construction Standards. Standard 6 in. metal clips may be used with spacing (see Figure 7). Three-eighth in. metal bolts and
nuts may be used to fasten together corner pieces (see Figure 8).
Clip Spacing Std. Clip Duct End
Length Flange
9 in.
6 in. 6 in. 6 in.
60 in. Duct Corner Piece
4 Req’d.
7 in. 7 in.
48 in. Duct
3 Req’d.
5 in. 5 in.
Sleeve Duct 36 in. Duct 3/8 in. bolt
3 Req’d. (optional)
5 in. 5 in.

24 in. Duct
2 Req’d.
Typical TDC/TDF joint
18 in. Duct &
Smaller
1 Req’d. CL
Duct

Figure 7: Detail of proprietary flanged system breakaway Figure 8: Detail of bolted corner.
connections.
5

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 Damper Maintenance
Dampers shall be maintained, cycled, and tested in intervals as stated in the latest editions of NFPA 90A, 92A,
and UL 864 unless local codes require more frequent inspections.

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, do not use oil-based lubricants or any other lubricants
that attract contaminant’s such as dust.

Damper Trouble Shooting

The following is a cause and correction list for common concerns with the dampers.

Symptom Possible Cause Corrective Action

Frame is ‘racked’ causing blades to Adjust frame such that it is square
bind on jamb and plumb
Damper does not
fully open and/or Screws in damper linkage Locate screws and remove
fully close
Contaminant’s on damper Clean with a non-oil-based solvent
(see Damper Maintenance)

Link separated Heat Replace link

Installation for Steel Stud Connection (SSC) Option

These instructions apply to 1 1/2 hour rated fire dampers mounted in steel stud walls. Specific requirements in these
instructions are mandatory. These instructions meet the requirements of UL 555. Installation shall comply with the
requirements of NFPA 90A Standard for the Installation of Air Conditioning and Ventilating Systems. U.L. listings
R13317 and R13743, California State Fire Marshal listings 3225-981:102 and 3225-1241:101, and New York City
BSA/MEA listing 260-91-M as they apply to these dampers.

1. NO ADDITIONAL SLEEVES OR ANGLES ARE REQUIRED

The fire damper extended frame is an approved sleeve and the Steel Stud Connection (SSC) Option allows
fastening of the fire damper sleeve directly to the wall's steel stud framing. Damper frame shall extend a
maximum of 6 in. beyond the wall opening on either side. Maximum size fire damper that may be installed
using this SSC option is 36 in. W x 36 in. H.

2. INSTALLATION
Fire damper with SSC option must be in place before the wall is constructed or it can be installed as the wall
is being constructed. Wall opening is framed around the fire damper before sheet rock or other wall board
material is applied to the steel studs. This installation provides appropriate protection for duct penetrations
in fire resistant wall construction using steel studs with a fire resistance rating less than 3 hours. The
following wall design numbers (as detailed in the UL Fire Resistance Directory) are appropriate for fire
damper installations using this SSC option:

1 Hour Design: U405, U406, U422, U434, U448, U451, U456, U457, U465, U468, U469,
U485, U494

11⁄2 Hour Design: U449, U452, U470, U471

2 Hour Design: U403, U411, U412, U421, U425, U428, U429, U443, U453, U474, U475,
U477, U484, U491, U495

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 3. FRAMING OF WALL OPENING Item Description
Form a wall opening 1/8 in. to 1/4 in. larger than 1 FD150X Fire Damper with SSC Option
the OD of the fire damper's extended frame Steel Stud Wall (See UL Fire Resistance
2
(sleeve) using the same metal studs and Directory for specific details)
techniques required by the wall design per the UL 3 Steel Stud Frame around opening in wall
Fire Resistance Directory. Open side of the steel 4 Duct Connection (See Section 6)
stud channels shall face the fire damper and Wallboard (See UL Fire Resistance Directory
5
encompass the damper's retaining bar. for specific details)
Fasteners (See UL Fire Resistance Directory
6
4. APPLY WALLBOARD AFTER DAMPER and Section 5)
INSTALLATION
After damper is installed, wallboard shall be
applied to steel stud framework in the manner
required by the wall design per the UL Fire
Resistance Directory listing. Around the damper
perimeter use a minimum of 2 connections per
side, spaced 12 in. (max.) and located a maximum 3
of 2 in. from each corner. No additional retaining
angles are required to complete the installation.

5. CONNECTING DUCTS TO THE FIRE DAMPER

All duct connections to FD & DFD 150X series
extended frame dampers must be “breakaway”
type connections. All connections shown on page 2
6 are considered breakaway. Factory furnished
duct collars on types R, CR, & CO fire dampers are
also considered breakaway.

3
6

5 1
3

Retaining 1 4
Bar

4 2

Top Cross-Section View Side Cross-Section View of

Damper in Wall

Due to continuing research, Greenheck reserves the right to change specifications without notice.

GREENHECK
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410 IOM-FD/DFD-150X Series
PH. 715-359-6171 Rev. 9 April 2004
www.greenheck.com Copyright © 2004 Greenheck Fan Corp.

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