Installation - Continued
2.SLEEVE LENGTH AND WALL/FLOOR THICKNESS
Insert the damper assembly into the prepared opening, to appropriate depth (see page 2, Fig. 1).
•Place the damper and attached retainer plate into the wall/floor opening.
•If a second retaining plate is being used, secure it on the opposite side of the wall/floor
Recommended maximum and minimum insertion depth
can be exceeded as long as the C of the damper
L
blade remains within the plane of the wall/floor.
important safety dANGER! To avoid causing death or serious bodily harm to building occupants, do not insert screws into the damper frame unless used for duct connection within 2 in. (51mm) of the frame end.
The sleeve may extend a maximum of 6 in. (152mm) beyond both sides of the wall or floor. Recommended standard sleeve lengths for various wall/floor thicknesses are:
DO NOT POSITION RETAINER PLATE(S) IN FRAME GROOVE
•Verify position, blade orientation, and actuator clearance then tighten the retainer plate clamping screws. The retainer plate(s) must overlap the wall/ floor opening a minimum of 1 inch (25mm). Secure the retainer plate(s) to the wall using appropriate fasteners (minimum #8 sheet metal screws) at the four corners of each retainer plate when two retainer plates are used and also within 3/4 in. (19mm) of the center of each plate when one retainer plate is used.
| Opening + 2 in. Min. | |
Fig. 2 | ||
|
Wall/Floor Thickness | Sleeve Length |
Dimension (Tw) | Dimension (L) |
Inches (mm) | Inches (mm) |
Up to 61/2 (165) | 13 5/8 (346) |
|
|
61/2 - 81/2 (165 - 216) | 15 5/8 (397) |
|
|
81/2 - 101/2 (216 - 267) | 17 5/8 (448) |
|
|
3. DUCT TO SLEEVE CONNECTIONS
Wall/Floor Opening | Clamping |
= Nominal Size + 7/8 in. Min. | Screw |
1.00 in. Typ. | Nut |
| Fasteners |
Dampers are supplied with sleeves from the factory and can be installed without the need for additional field installed sleeves.
Gauge of factory furnished sleeve determines the type of duct to sleeve connections required (see table below). Any duct connection other than the breakaway connections are considered rigid.
Sleeve Gauge | Duct Dimension | Type of Duct to |
(mm) | Maximum | Sleeve Connection |
| Inches (mm) | Permitted |
|
|
|
10 ga. (3.5) |
|
|
|
|
|
14 ga. (2) | 24 (610) | Rigid or Breakaway |
|
|
|
16 ga. (1.5) |
|
|
|
|
|
20 ga. (1mm) | 24 (610) | Breakaway only |
|
|
|
Sleeve thickness must not be less than the gauge of the connecting duct.
UL Standard 555 requires all ducts to terminate at fire damper sleeves.
4.SECURING THE DAMPER/SLEEVE ASSEMBLY TO WALL AND FLOOR OPENINGS
Damper assemblies must be installed in wall/floor openings using a single retaining plate on either side of the wall/floor or by using a retaining plate on both sides of the wall/floor. The use of a second retaining plate is allowed, but is not necessary. A single retaining plate is provided with the dampers. A second retaining plate can be ordered as an option.
•The retaining plate(s) will open up for easy installation when the clamping screw is loosened. If necessary, remove the clamping screw and nut (see Fig. 2).
(IMPORTANT: The clamping mechanism should face away from the wall/floor). Retainer plate(s) are designed to mount flush to the wall/floor and hold the damper in the wall/floor opening.
Retaining
Plate Assembly
Clamping Screw
5.Recommended Preparation of Openings in Wood and Metal Stud Walls
•Frame wall openings as shown below. (see Fig. 3)
•Double vertical studs are not required for openings
36 in. x 36 in. (914mm x 914mm) or smaller.
•Gypsum wall board must be fastened 12 in. (305mm) on center to all stud and runner flanges surrounding opening. (see Fig. 4)
•All construction and fasteners must meet the requirements of the appropriate wall design (See UL
Fire Resistance Directory) and/or local codes.
DAMPER FRAME
Fig. 3
METAL
STUD1.00
MIN
DO NOT PLACE
RETAINER PLATE
IN THIS GROOVE.
DAMPER FRAME
WOOD
STUD
1.00 MIN
DO NOT PLACE
RETAINER PLATE3
IN THIS GROOVE.
