Greenheck DFD Series User Manual

Duct to Sleeve Connection
Sleeve Gauge and Connection Type Requirements
Sleeve Gauge Duct Dimension
Type of Duct
to Sleeve
Connection
Permitted
14 ga. (0.075 in.)
- 10 ga. (0.138
in.)
[2mm - 3.5mm]
All duct sizes
Rigid or
Breakaway
16 ga. (0.060 in.)
[1.5mm]
36 in. (914mm) max. width
24 in. (610mm) max.
height
24 in. (610mm) diameter
Rigid or
Breakaway
16 ga. (0.060 in.)
[1.5mm]
All duct sizes
Breakaway only
18 ga. (0.048 in.)
[1.2mm]
85 in. (2159mm) wide and
over
20 ga. (0.036 in.)
[0.9mm]
55 in. - 84 in. wide
(1397mm - 2134mm)
22 ga. (.030 in.)
[0.76mm]
31 in. - 54 in. wide
(787mm - 1372mm)
24 ga. (0.024)
[0.6mm]
13 in. - 30 in. wide
(330mm - 762mm)
26 ga. (0.018 in.)
[0.46mm]
12 in. wide and under
(305mm)
See Breakaway Connection section for additional information.
UL Standard 555 requires all ducts to terminate at fire damper sleeves.
Approved Breakaway Connections
All breakaway connections described below may utilize the following duct sealants: PA2084T duct sealant adhesive
manufactured by Precision, DP1010 water base duct sealant manufactured by Design Polymetrics, Grey Pookie,
Ductmate PROseal®, or CL Ward S Seal in accordance with SMACNA recommendations.
Transverse Joints
The transverse joints shown below are approved as breakaway connections.
• A maximum of two #10 (19mm) sheet metal screws on each side and on the bottom may be used. The
screws should be located in the center of the slip pocket and penetrate both sides of the slip pocket.
• Dampers up to 20 inches (508mm) high may use transverse joints on the top and bottom and Drive Slip
joints (see Figure 17) on the sides.
Plain “S” Slip Hemmed “S” Slip Double “S” Slip
Inside Slip Joint Standing “S” Standing “S” (Alt.)
Standing “S” (Alt.) Standing “S” Standing “S”
(Bar Reinforced) (Angle Reinforced)
Figure 16 - Transverse Joints
Drive Slip Joint
Figure 17
The size of the damper/duct determines the required
sleeve gauge and the required duct to sleeve
connection (see table to the right). The sleeve thickness
must also not be less than the gauge of the connecting
duct. Any duct connection other than the breakaway
connections described below are considered rigid.
Multi-Blade Fire and Combination Fire Smoke Dampers 9

Greenheck DFD Series Specifications

General

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