Greenheck CFSD Series Installation, Operation And Maintenance Manual page 6

Manufactured Flanged System Breakaway Connections
Flanged connection systems manufactured by Ductmate, Durodyne, Ward, MEZ, and Nexus are approved as
breakaway connections when installed as illustrated (see Figure 9).
Proprietary Flange System Breakaway Connections
(TDC by Lockformer, TDF by Engle)
TDC and TDF systems are approved as breakaway connections when installed as described in the TDC or TDF
addendum to the SMACNA Duct Construction. Standard 6 in. (152 mm) metal clip may be used with spacing as
shown in diagram (see Figure 10 & 11). A
pieces (see Figure 12).
Sleeve
Duct
Typical TDC/TDF
joint
Figure 10
Sleeve
Duct
Typical TDC/TDF
joint
#10 x 3/4"
TEK Screw
TDC or TDF
Connection
TDC/TDF to Manufactured Flange
Butyl Gasket
Flanged connection systems manufactured by Ductmate, Durodyne, Ward, Nexus, Radiant T-35m, and MEZ can
be connected to TDC and TDF system as an alternate breakaway connection. This alternate connection is covered
under the UL certification of the damper. See Supplement: Duct-Sleeve Connection (IOM #468502) for more
information.
Metal cleat
TDC or TDF
Connection
Butyl Gasket
Figure 13: Metal cleat method
6 CFSD Series
6 in. long metal cleat or 1/16 in.
maximum thickness plastic cleat;
12 in. c-c (minimum 1 per side)
Flanged system angles
(Attach per
manufacturer's
instructions)
Duct
Figure 9
⁄ in. (9.5 mm) metal bolts and nuts may be used to fasten together corner
Clip Spacing 3
Std. Clip 8
Length
60 Duct 6
6
4 Reqd.
Clip Spacing
Std. Clip
48 Duct
7
3 Reqd.
Length
6
60 Duct
6
36 Duct
5
4 Reqd.
3 Reqd.
24 Duct
5
48 Duct
7
2 Reqd.
3 Reqd.
36 Duct 5
18 Duct &
3 Reqd.
Smaller
C L
1 Reqd.
Duct
24 Duct
5
2 Reqd.
18 Duct &
Smaller
1 Reqd.
Figure 11
Spot weld or Tek screw per
manufacturer instructions
Damper Sleeve
Spot weld or Tek screw per
manufacturer instructions
Damper Sleeve
Fire Damper Sleeve
3/8 in. bolts in corners
between all angles
Neoprene or Butyl gasket
between all angles
9
6
7
9
6
5
5
7
5
5
C L
Duct
#10 x 3/4"
TEK Screw
TDC or TDF
Connection
Butyl Gasket
Figure 14: Screw method
Metal cleat
Duct End
Flange
Figure 12
Spot weld or Tek screw per
manufacturer instructions
Damper Sleeve
Corner Piece
3/8 in. bolt
(optional)
®