Metal Fab TB5000 User manual

INSTALLATION INSTRUCTIONS
MODEL MSCD CEILING DAMPER / TB5000
THERMAL INSULATION / AIR DIFFUSER
ASSEMBLIES
FIRE AND CEILING RADIATION DAMPERS
Metal-Fab, Inc. ceiling radiation dampers are classied for all UL Fire Resistant Floor-Ceiling and Roof-Ceiling Designs in the UL
Fire Resistance Directory that utilize a hinged type damper in the design. The classied UL assemblies are rated for three (3) hours
or less and construction materials include gypsum wallboard and acoustical panels (lay-in tiles). Refer to the UL Fire Resistance
Directory for specic design information.
When installed as described herein, the MSCD damper, TB5000 Thermal Insulation Assembly provides the necessary protection to
lay- in style ceiling air diffusers in Fire Rated Floor/Roof-Ceiling assemblies with re resistance ratings of 3 hours or less, as described
in the current UL Fire Resistance Directory. A maximum size ceiling penetration of 576 sq. in. Can be protected utilizing the TB5000
Thermal Insulation furnished with the ceiling damper, to protect the exposed portion of the ceiling air diffuser and the neck or inlet of
the diffuser. Installation and diffuser shown in FIG. 1 illustrate a general arrangement. Installations must also include any specic
requirements described in the specic re resistant design.
Metal-Fab, Inc. ceiling radiation dampers are unrestricted in the type of transition incorporated between the damper and supply air
or return air duct systems. It is acceptable to attach the duct, rigid metal sleeve (plenum or boot) or exible, directly to the damper.
Refer to the UL Fire Resistance Directory for specic design information (See FIG. 2).
All ceiling assemblies in the Fire Resistance Directory require that lay-in ceiling panels, which are cut to ll smaller size openings in
the ceiling grid modules due to air duct penetrations, must bear a minimum of 3/8” on the anges of the grid.
PRINCIPAL COMPONENTS
1. UL Classied Model MSCD Damper and Model TB5000 Thermal Insulation (marked accessory part of MSCD dampers/blanket
assembly, UL Classied for use with damper size as noted on blanket).
ATTACHMENT OF MSCD DAMPER TO DIFFUSER NECk
1. Place damper tightly over or inside the diffuser neck and attach it to diffuser neck using #10 (min.) x 1/2” long sheet metal
screws to 8 in. O.C. (max.) with a minimum of (4) screws, 1 per side at a minimum of 3/16” from bottom of damper frame.
IMPORTANT: SCREWS USED IN CONNECTION OF DAMPER MUST NOT INTERFERE WITH DAMPER BLADE OPERATION.
INSTALLATION OF TB5000 THERMAL INSULATION
1. Install TB5000 over back of diffuser making sure hole in thermal insulation ts over neck of diffuser and making sure it is square
to diffuser. Replace if damaged during installation or shipment.
2. Tuck TB5000 Thermal Insulation behind T-bars around diffuser perimeter. TB5000 must cover all exposed surfaces of ceiling
air diffuser.
PREPARATION OF CEILING MEMBRANE
In order to properly install the Model MSCD damper/TB5000 Thermal Insulation / lay-in diffuser, the following must be done:
1. After installing the 2’ cross tee in the ceiling grid (or if already installed), bend back the tabs of the 2’ T-bars against the web of
the T-bar intersected.
2. Using No. 12 S.W.G. (min.) galvanized steel hanger wire, independently support all four corners of the T-bar system at the corners
of the diffuser. The hanger wires should be vertical (not splayed) and adequately fastened to the structural oor of roof
members above.
UL CLASSIFIED
(SEE COMPLETE MARKING
ON PRODUCT)

GENERAL NOTES:
1. No dampers/ductless grilles (returns) shall be located in adjacent 24” x 48” ceiling grid modules.
2. If exible 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 exible 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 exible duct shall not exceed 14’–0” in length. The exible air duct shall not rest on the back
surface of the ceiling grid or panels and provide a minimum of 4” clearance. The exible 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 specied in the individual oor 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