GENERAL NOTES:
1. No dampers/ductless grilles (returns) shall be located in adjacent 24” x 48” ceiling grid modules.
2. If flexible duct is used, it shall be fastened to the diffuser neck with a steel clamp or #16 S.W.G. (min) galvanized steel wire.
The flexible air duct shall be Class O or Class I type, bearing the UL Listing Mark-See the UL “Gas and Oil Equipment
Directory”. Maximum Length of flexible duct shall not exceed 14’–0” in length. The flexible air duct shall not rest on the back
surface of the ceiling grid or panels and provide a minimum of 4” clearance. The flexible air duct shall not interfere with the closing
of the MSCD damper.
3. MSCD Damper/TB5000 Thermal Insulation/Air Diffuser Assemblies are for use in lieu of the hinged-blade, sheet metal damper
in steel ducts as specified in the individual floor and roof-ceiling design(s) being used, as illustrated and described in the current
UL Fire Resistance Directory.
4. If damper has an adjustable volume control, the 2 fuse links (shipped loose with damper) must be installed on damper for proper
operation.
5. Cycle damper after installation.
Litho in U.S.A.
©
2011 Metal-Fab, Inc. Form No. L1801 - 11/11
8881
FIG. 1
FIG. 2
TO BOTTOM OF
DAMPER PLATE
(CLOSED) 3-3/4"
LAY IN DIFFUSER
CEILING TILE
HANGER WIRE
TB5000
MRCD
CROSS TEE BAR
2' 0" LONG
CROSS TEE BAR
4' 0" LONG
CROSS TEE BAR
4' 0" LONG
MAIN TEE BAR
MAIN TEE BAR
MAIN TEE BAR
HANGER WIRE
