Greenheck FD Installation, Operation And Maintenance Instructions page 7

Round and Oval Duct Breakaway Connections
Round ducts connected to factory supplied Type R or CR
damper collars may use #10 sheet metal screws as follows:
• Ducts 22 in. (559mm) wide (or dia.) and smaller may use
3 screws.
• Ducts larger than 22 in. (559mm) wide (or dia.) may use
5 screws.
NOTE: All breakaway connections described may have
duct sealant applied, PA2084T duct sealant adhesive
manufactured by Precision or DP1010 water base duct
sealant by Design Polymetrics, Grey Pookie, or Ductmate
PROseal ® , or CL Ward S Seal in accordance with SMACNA
recommendations.
Manufactured Flanged System Breakaway
Connections
Flanged connection systems manufactured by Ductmate,
DuroDyne, Ward, Nexus, and Radiant T-35 are approved
as breakaway connections when installed as illustrated in
Figure 6.
Proprietary Flange System Breakaway
Connections
(TDC by Lockformer, TDF by Engle)
TDC and TDF systems are approved as breakaway con-
nections when installed as described in the SMACNA Duct
Construction Standards. Standard 6 in. (152mm) metal clip
may be used with spacing as shown in Figure 7. Three-
eighths in. (9.5mm) metal bolts and nuts may be used to
fasten together corner pieces.
Preparation of Openings in Wood and Metal Stud Walls
• Frame wall openings as shown in Figure 8 & 8A.
• Gypsum wall board must be fastened 12 in. (305mm) on center to all stud and runner flanges surrounding opening (see
Figure 8 & 8A).
• Prepare opening between studs and sleeve assembly as shown (see. Figure 9).
• All construction and fasteners must meet the requirements of the appropriate wall design. (See UL Fire Resistance
Directory)
Metal Stud Construction
Gypsum Wallboard
Retaining
Angle
In metal stud construction,
Damper
exposed steel surfaces need
Sleeve
not be covered with gypsum
wallboard.
Figure 9: Detail of retaining angles and gypsum board application for metal and wooden stud construction.
Wooden Stud Construction
Gypsum Wallboard
DUCT-SLEEVE CONNECTIONS cont...
Sleeve
Typical TDC/TDF joint
Sleeve
Typical TDC/TDF joint
Stud or Runner
1in. (25mm) minimum
Stud or Runner
6 in. long metal cleat or 1/16 in.
max. thickness plastic cleat;
12 in. c-c (min. 1 per side)
Flanged system angles
(Attach per
manufacturer's
instructions)
Duct
Figure 6: Detail of manufactured flanged system
breakaway connections.
Clip Spacing
6 in.
60 in. Duct
4 Req'd.
48 in. Duct
3 Req'd.
Clip Spacing
Std. Clip
Length
36 in. Duct
Duct
6 in. 6 in.
3 Req'd.
60 in. Duct
4 Req'd.
7 in.
24 in. Duct
48 in. Duct
2 Req'd.
3 Req'd.
5 in.
18 in. Duct &
36 in. Duct
Duct
3 Req'd.
5 in.
24 in. Duct
Figure 7: Detail of proprietary flanged system
2 Req'd.
breakaway connections.
18 in. Duct &
Smaller
1 Req'd.
Retaining
Angle
Damper
Sleeve
Retaining
Angle
Damper
Sleeve
Neoprene or Butyl gasket
between all angles
Std. Clip
Length
9 in.
6 in.
7 in.
5 in.
9 in.
6 in.
5 in.
7 in.
5 in.
Metal Stud Construction
Smaller
C L
5 in.
1 Req'd.
Duct
Gypsum Wallboard
C L
Duct
Stud or Runner
In metal stud construction,
exposed steel surfaces need
not be covered with gypsum
wallboard.
Wooden Stud Construction
Gypsum Wallboard
Stud or Runner
1in. (25mm) minimum
In wood stud construction,
gypsum wallboard must cover
all wood stud surfaces.
Fire Damper Sleeve
3/8 in. bolts in
corners are optional
6 in.
7 in.
5 in.
5 in.
1in. (25mm) minimum
7