Greenheck FD 150X Installation, Operation And Maintenance Instructions page 6

(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 8). Three-eighth in. metal
bolts and nuts may be used to fasten together corner pieces (see Figure 9).
Figure 8: Detail of proprietary flanged system breakaway
connections.
Installation for Steel Stud Connection (SSC) option
These instructions apply to 11/2 hour rated fire dampers mounted in steel stud walls. Specific requirements in these
instructions are mandatory. These instructions meet the requirements of UL555. 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. (152mm) 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
(914mm x 914mm).
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
6
Duct End
Flange
Figure 9: Detail of bolted corner.
3. FRAmIng oF WALL oPEnIng
F orm a wall opening 1/8 in. (3mm) to 1/4 in. (6mm)
larger than the OD of the fire damper's extended frame
(sleeve) using the same metal studs and techniques
required by the wall design per the UL Fire Resistance
Directory. Open side of the steel stud channels shall
face the fire damper and encompass the damper's
retaining bar.
4. APPLY WALLBoARD AFtER DAmPER
InStALLAtIon
A fter 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. (305mm)
maximum and located a maximum of 2 in. (51mm)
from each corner. No additional retaining angles are
required to complete the installation.
5. ConnECtIng DUCtS to tHE FIRE DAmPER
A ll duct connections to FD & DFD 150X series
extended frame dampers must be "breakaway" type
connections. All connections shown on page 5 & 6 are
considered breakaway. Factory furnished duct collars
on types R, CR, & CO fire dampers are also considered
breakaway.
Corner Piece
3/8 in. bolt
(optional)