VENCO DFDR Series User manual

Round Fire and Combination Fire Smoke Dampers 1
Document 483515
Fire and Combination Fire Smoke Dampers
DFDR-XXX, FDR-XXX, FSDR-XXX, SEDFDR-XXX,
SEFSDR-XXX, SSDFDR-XXX, SSFDR-XXX,
SSFSDR-XXX Series
11⁄2Hour
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
These instructions apply to 11⁄2hour rated fire and
combination fire smoke dampers mounted in: 1)
masonry, block, or stud walls and 2) concrete floors or
ceilings. Specific requirements in these instructions are
mandatory. Dampers must be installed in accordance
with these instructions to meet the requirements of
UL 555 and/or UL 555S.
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.
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 (38°C).
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.
Table of Contents
General Information . . . . . . . . . . . . . . . . . . 2
Electrical Guidelines . . . . . . . . . . . . . . . . . . 2
Pre-Installation Guidelines . . . . . . . . . . . . . . . 2
Preparation of Openings . . . . . . . . . . . . . . . . 3
Clearances Required Between Damper Sleeves and
Wall/Floor Openings . . . . . . . . . . . . . . . . . . 4
Inserting Damper into Wall/Floor Openings . . . . . . 5
Securing the Damper/Sleeve Assembly to Wall and
Floor Openings. . . . . . . . . . . . . . . . . . . . . 6
Duct to Sleeve Connections . . . . . . . . . . . . . . 6
Actuator and Temperature Response Device
Connections . . . . . . . . . . . . . . . . . . . . . . 6
Blade Orientation . . . . . . . . . . . . . . . . . . . 8
Damper Maintenance . . . . . . . . . . . . . . . . . 8
Damper Troubleshooting. . . . . . . . . . . . . . . . 8

Round Fire and Combination Fire Smoke Dampers2
General Information
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555 & 555S (Listing #R13317)
Electrical Guidelines
The following items will aid in completing the damper
installation in a timely and effective manner.
1) Check the drawings for proper damper locations
within the building. Visually inspect the damper for
damage and verify that the Reusable Resettable Link
(RRL) is in place and has not activated if provided.
These electric links have a button for resetting.
Visually inspect the fusible link (if provided) to verify
its not missing or broken. Replace link as necessary.
2) Lift or handle damper using sleeve or frame. Do not
lift damper using blades or actuators.
3) Damper has label on outside of sleeve indicating
a ‘No Screw’ area. Do not install screws into this
area as screws may interfere with unexposed blade
linkage and prevent damper blades from opening
and/or closing.
4) Damper has label indicating position of damper
and sleeve assembly in the wall. Install accordingly
to comply with manufacturer’s appropriate UL
Classification file number.
5) Damper must be installed into duct or opening
square and free of twist or other misalignment. Out
of square, racked, twisted or misaligned installations
can cause excessive leakage and/or torque
requirements to exceed damper/actuator design.
6) Damper and actuator 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
7) Damper should be sufficiently covered as to prevent
overspray if wall texturing or spray painting will be
performed within 5 feet of the damper. Excessive
dirt or foreign material deposits on the damper can
cause excessive leakage and/or torque requirements
to exceed damper/actuator design.
8) 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 plate.
9) ACCESS: Suitable access (such that RRL’s and
actuators can be maintained, etc.) 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).
10) The Code Authority Having Jurisdiction (AHJ) must
evaluate and provide approval of final installation
where variations to these instructions are necessary.
Pre-Installation Guidelines
Installation Supplements
• Steel Deck Supplement
Electrical Guidelines
All wiring shall be done in accordance with the
National Electrical Code ANSI/NFPA-70 latest edition,
any local codes that may apply, and wiring diagrams
developed in compliance with the job or project
design and specifications
Important!
Electrical input may be needed for this equipment.
This work should be performed by a qualified
electrician. Verify power before wiring actuator.
Greenheck is not responsible for any damage to, or
failure of the unit caused by incorrect field wiring. To
avoid causing death or serious bodily harm to building
occupants, follow all instructions carefully. Dampers
must close completely to preserve the integrity of the
fire smoke separation.

Round Fire and Combination Fire Smoke Dampers 3
Preparation of Openings
• Frame wall openings as shown below (see Figure 1, 2, & 2A).
• Gypsum wall board must be fastened 12 in. (305mm) on center (O.C.) to all stud and runner flanges surrounding
opening.
• Prepare opening between studs and sleeve assembly as shown below (see Figure 3 & 4).
• All construction and fasteners must meet the requirements of the appropriate wall design (See UL Fire Resistance
Directory) and/or local codes.
Figure 1
12 in.
24 in. o.c.
Maximum
Floor Runner
2 in.
Ceiling Runner
2 Panhead
Screws
24 in. o.c.
Maximum
(metal studs)
24 in. o.c.
Maximum
(metal studs)
16 in. o.c.
Maximum
(wood studs)
16 in. o.c.
Maximum
(wood studs)
2 in.
Figure 2
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Metal stud only
Second set of studs are not required on openings
36 in. x 36 in. (914mm x 914mm) or smaller.
Metal stud only
Figure 2A

Round Fire and Combination Fire Smoke Dampers4
Damper Model Maximum Size
DFDR-510
24 in.
(610mm)
FDR-510
FSDR-511
FSDR-512
Maximum Size Table
Fire damper assemblies expand during periods of intense heat. Therefore, it is essential that openings in walls or
floors be larger than the fire or combination fire smoke damper assembly to allow for this expansion. The wall/floor
opening must be a minimum of 7⁄8in. (22mm) larger than the outside diameter of the damper.
Clearances Required Between Damper Sleeves and Wall/Floor Openings
IN THIS GROOVE.
RETAINER PLATE
DO NOT PLACE
IN THIS GROOVE.
DO NOT PLACE
RETAINER PLATE
DAMPER FRAME
DAMPER FRAME
WOOD
STUD
MIN
1.00
STUD
METAL
1.00
MIN
Figure 3: wood stud
IN THIS GROOVE.
RETAINER PLATE
DO NOT PLACE
IN THIS GROOVE.
DO NOT PLACE
RETAINER PLATE
DAMPER FRAME
DAMPER FRAME
WOOD
STUD
MIN
1.00
STUD
METAL
1.00
MIN
Figure 4: metal stud

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 C
L(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.

Round Fire and Combination Fire Smoke Dampers6
Actuator and Temperature Response Device Connections
Actuator Connections
Electrical and/or pneumatic connections to damper actuators should be made in accordance with wiring and piping
diagrams developed in compliance with applicable codes, ordinances and regulations (see Electrical Guidelines).
Duct to Sleeve Connections
Sleeve Gauge and Connection Type Requirements
Round duct connections shall be attached with #8 or #10 sheet metal screws as follows:
• Ducts 22 in. (558mm) dia. and smaller shall have three screws.
• Ducts larger than 22 in. (558mm) dia. up to and including 24 in. (610mm) dia. shall have five screws.
Note: All connections described may have duct sealant, PA2084T duct sealant adhesive manufactured by Precision,
DP1010 water base duct sealant manufactured by Design Polymerics, Grey Pookie, Ductmate PROseal®, or
CL Ward S Seal applied in accordance with SMACNA recommendations.
Damper assemblies must be installed in wall and 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. A single retaining plate is provided with
the dampers. A second retaining plate can be ordered as an option.
• 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 Figure 7).
• Position the retaining plate between the blade axle and the
actuator shaft as shown in Figure 5 & 6. Do not place
the retaining plate in the groove. IMPORTANT: The
clamping mechanism should face away from the wall/
floor.
• Place the damper and attached retaining plate into the
wall/floor opening.
• If a second retaining plate is being used, secure it on the
opposite side of the wall/floor.
• Verify position, blade orientation, and actuator clearance
then tighten the retaining plate clamping screws.
• The retaining plate(s) must overlap the wall/floor opening a
minimum of 1 in. (25mm).
• Secure the retaining plate(s) to the wall at the four corners
of each plate when two retaining plates are used
and also within 3/4 in. (19mm) of the center of each
side when one retaining plate is used. The following
fasteners shall be used:
- #8 or #10 screws of a length such that the screw
engages the steel stud/track by 1/2 in. (13mm)(steel
framing).
- #8 or #10 screws of a length such that screw engages
the wood stud by 13/4 in. (44mm) (wood framing)
- Steel anchors or self tapping concrete screws penetrating masonry or block by 11/4 in. (32mm).
Securing the Damper/Sleeve Assembly to Wall and Floor Openings
Opening + 2 in. Min.
1.00 in. Min. Typ.
Fasteners
Clamping
Screw
Nut
Retaining
Plate
Assembly
Clamping Screw
Minimum Wall/Floor Opening
= Nominal Dia. + 7/8 in.
Figure 7: Retaining Plates

Round Fire and Combination Fire Smoke Dampers 7
Temperature Response Device Connections
RRL: The RRL (resettable link device) incorporates a single thermostat. When the thermostat temperature is reached,
the sensor interrupts power to the actuator and the actuator's spring return mechanism causes the damper to
close. Refer to Figure 8 for wiring of the RRL thermostat.
OCI: The OCI (open or closed indicator) option contains two single pole single throw switches used to indicate the
damper blade position. The switches provide a positive open and closed signal and can be used in conjunction
with remote indicator lights. Refer to Figure 9 for wiring of the OCI option.
RRL /OCI: The RRL/OCI performs the function of an RRL and OCI (see description above). Refer to Figure 10 for
wiring of the RRL/OCI option.
TOR: The TOR (temperature override device) option incorporates two thermostats with fixed settings (usually
165°F [74°C] and 350°F [177°C]). The primary sensor (the sensor with the lower temperature setting) can be
bypassed by an external contact closure allowing the damper to reopen until the secondary temperature is
reached (the sensor with the higher temperature setting). See Figure 11.
The TOR assembly contains two single pole single throw switches used to indicate damper blade position.
The switches provide a positive open and closed signal and can be used in conjunction with remote indicator
lights. See Figure 11 for wiring of the TOR thermostats and indicator switches.
If either the TOR or the RRL is ordered with a pneumatic actuator, an EP switch is required with an appropriate
electric power circuit to allow the electric thermostat to control the pneumatic actuator.
Figure 8: RRL Wiring Figure 9: OCI
Ratings (Figure 8, 9, 10, & 11)
Integral Switch Type: Single Pole, double throw
Electrical Capacity: 10 Amps, 1/3 hp, 120 or 240 Vac
½ Amp, 125 Vdc;
¼ Amp 250 Vdc
5 Amps, 120 Vac “L” (lamp load)
1.0 Amps, 24 Vac
1.5 Amps, 24 Vdc
Temperature Limit: 165° F (standard primary sensor)
212° F (optional primary sensor)
250° F (secondary sensor )*
350º F (secondary sensor)*
* based on actuator temperature rating
Figure 10: RRL/OCI Figure 11: TOR

483515 • DFDR FDR FSDR, Rev. 3, January 2022 Copyright 2022 © Venco Products8
As a result of our commitment to continuous improvement, Venco reserves the right to change specifications
without notice.
Our Commitment
Phone: [phone] • Fax: [phone] • E-mail: [email protected] • Website: www.vencoproducts.com
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, jackshaft bearings and
jamb seals, do not use oil-based lubricants or any other lubricants that attract contaminants such as dust.
Dampers and their actuator(s) must be maintained, cycled, and tested a minimum in accordance with:
• The latest editions of NFPA 80, 90A, 92, 101, 105, UL864, AMCA 503-03 and local codes.
• Actuator manufacturer recommendations.
Damper Troubleshooting
The following is a possible cause and correction list for common concerns with dampers.
Symptom Possible Cause Corrective Action
Damper does not
fully open and/or
close
Frame is 'racked' causing blades to
bind on jamb seals
Adjust frame such that it is square and plumb
Actuator linkage loose Close damper, disconnect power, adjust and
tighten linkage
Defective motor Replace
Screws in damper linkage Damper installed too far into wall. Move out to
line as designated on damper label
Contaminants on damper Clean with a non-oil based solvent (see Damper
Maintenance)
RRL or TOR sensor
tripped
Heat Push reset button located on backside of RRL or
TOR
Damper does not
operate
No power supplied to the actuator Add power supply
Blade Orientation
Axle
30°
30° Off Horizontal (Maximum)
Axle
30°
30° Off Horizontal (Maximum)
Axle
Normal