Greenheck DFD Series User Manual

Round and Oval Duct Breakaway Connections
Factory furnished duct collars, type R and O, are also
considered breakaway (see Figure 18).
Round or flat oval ducts connected to Type R or O damper
collars shall be attached with #10 (19mm) sheet metal
screws as follows:
• Ducts up to 22 in. (558mm) wide (or dia.) and less
shall have three screws.
• Ducts larger than 22 in. (558mm) wide (or dia.) up
to and including 36 in. (914mm) wide (or dia.) shall
have five screws.
Fire Damper Sleeve
Neoprene or Butyl gasket
between all angles
Flanged system angles
(Attach per
manufacturer's
instructions)
Duct
3/8 in. bolts in
corners are optional
6 in. long metal cleat or 1/16 in.
max. thickness plastic cleat;
12 in. c-c (min. 1 per side)
Figure 19
Approved Breakaway Connections....
Duct
Sleeve
6 in.
Std. Clip
Length
C
L
Duct
60 in. Duct
4 Req’d.
48 in. Duct
3 Req’d.
36 in. Duct
3 Req’d.
24 in. Duct
2 Req’d.
18 in. Duct &
Smaller
1 Req’d.
Clip Spacing
Typical TDC/TDF joint
6 in. 6 in.
9 in.
7 in.7 in.
5 in. 5 in.
5 in.5 in.
Figure 21
Duct End
Flange
Corner Piece
3/8 in. bolt
(optional)
Figure 22
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 Standards. Standard 6 in. (152mm) metal clip may be used with
spacing as shown in diagram (see Figure 20 & 21). 3
3
⁄8 in. (9.5mm) metal bolts and nuts may be used to fasten
together corner pieces (see Figure 22).
Duct
Sleeve
6 in.
Std. Clip
Length
C
L
Duct
60 in. Duct
4 Req’d.
48 in. Duct
3 Req’d.
36 in. Duct
3 Req’d.
24 in. Duct
2 Req’d.
18 in. Duct &
Smaller
1 Req’d.
Clip Spacing
Typical TDC/TDF joint
6 in. 6 in.
9 in.
7 in.7 in.
5 in. 5 in.
5 in.5 in.
Figure 20
Wall or Floor
Sleeve
Duct
Damper
Type B
Wall or Floo
r
Sleeve
Duct
Damper
Type R, O
Type R and O
factory furnished
duct collars qualify
as breakaway
connections.
Figure 18: Type R and O Transition
Manufactured Flanged System Breakaway Connections
Flanged connection systems manufactured by Ductmate, Durodyne, Ward, Nexus, Radiant T-35m, and MEZ are
approved as breakaway connections when installed as illustrated (see Figure 19).
Multi-Blade Fire and Combination Fire Smoke Dampers10

Greenheck DFD Series Specifications

General

Brand	Greenheck
Model	DFD Series
Category	Fire and Smoke Dampers
Language	English