Securing The Damper/Sleeve Assembly To Wall/Floor Openings - Greenheck ODFD Series Installation, Operation And Maintenance Manual

Securing the Damper/Sleeve Assembly to Wall/Floor Openings

Damper/sleeve assemblies must be installed in wall openings using flanges and sheet metal screws as illustrated
and described below.
• Flange on front (grille end) of sleeve must be a minimum of 16 ga. (1.5mm) steel and have
minimum flange leg (refer to Figure 8). Using #10 (19mm) sheet metal screws, screw from inside of
sleeve through the rear portion of the studs (as shown in Figures 3 & 4). Space screws a maximum of 6
in. (152mm) O.C. and a maximum of 2 in. (51mm) from the corners (minimum of 2 screws per side). No
retaining angles are required on the side of the wall opposite from the grille.
• Retaining angles for 1
ga. (1mm). The leg of the retaining angle on the damper sleeve shall be a minimum of 1
leg of the retaining angle on the wall/floor shall be long enough to cover the annular space and overlap the
wall/floor by a minimum of 1 in. (25mm). See Figure 9.
• Retaining angles must be attached to the damper using one or more of the following methods of
attachment:
- Tack or spot welds
- #10 ( ⁄
3
4
- ⁄ in. (6mm) bolts and nuts
1
4
- ⁄ in. (5mm) steel pop rivets
3
16
Attachments must be spaced a maximum of 6 in. (152mm) on center and a maximum of 2 in. (51mm) from corners.
The angles must be attached to all four sides of the sleeve. A minimum of two attachments are required on each
side, top and bottom. The angles need not be attached to each other at the corners.
Caution! Do not tear the thermal blanket during installation.
Flange
Wall
Figure 8: Sleeved Damper with Thermal
Blanket (duct termination)
⁄ hour rated dampers with a width 48 in. (1219mm) or less must be a minimum of 20
1
2
in. [19mm] max.) sheet metal screws
Thermal Blanket
(installed around entire
outside surface of sleeve)
2 i
n .
M a
x .
6 i
n .
M a
x .
6 i
n .
M a
x .
2 i
n .
M a
x .
Wall
Figure 9: Sleeved Damper with Thermal
Blanket (duct continuation).
Out of Wall Fire and Combination Fire Smoke Dampers
⁄ in.(16mm)
5
8
⁄ in. (32mm). The
1
4
Retaining Angle
Thermal Blanket
(installed around
entire outside
surface of sleeve)
5