Ceiling Damper for horizontal mounting in air duct outlets in 3 hour non-combustible and 1 hour combustible ceiling locations.
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Construction and Size Limitations shall be as follows:
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SIZE LIMITATIONS, INCHES
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Damper Type
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Damper Shape
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Protection On Back Of Damper Blades
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Max Area
+, In2
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Max Width
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Max Length
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Min Width
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Min Length
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| CFD-5W* |
Square or Rectangular |
Ceramic Paper |
70 |
17 |
14 |
5 |
4 |
| CFD-5(A)W* |
Square or Rectangular |
Ceramic Paper |
70 |
17 |
14 |
5 |
4 |
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Damper Type
|
Damper Shape
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Protection On Back Of Damper Blades
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Max Area
+, In2
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Max. Dia. |
Min. Dia. |
| CFDR(A)W |
Round |
Ceramic Paper |
80 |
10 inch |
5 inch |
Ceiling damper types CFD-5W, CFD-5(A)W or CFDR for horizontal installation in air duct outlets of fire resistand ceilings. For use in conjunction with Lay-In diffusers. These assemblies consist of a ceiling damper and thermal blanket insulation to be used over the back of the Lay-In diffuser.
NOTE: Damper Types CFD and CFDR may be followed with a suffix 'A' denoting use of an adjustable fusible link assembly on a 6" x 6" or 6" diameter or larger size ceiling damper.
The thermal blanket used with the CFD-5(A)W or CFDR-(A)W damper/blanket assembly is formed as shown in Figures 36 and 37. The blanket strip shown in Figures 38 and 39 is supplied with the blankets when required per the installation instructions.
Evaluated to the following:
Unless otherwise noted, assemblies in this section have been evaluated for conformance to the following standards:
UL-555, Fire Dampers & Ceiling Dampers
CAN/ULC-S112, Standard Method of Fire Test of Fire Damper Assemblies;
and are installed in accordance with the following:
NFPA-90A, Installation of Air Conditioning & Ventilating Systems.
Manufacturer's Instructions.
All assemblies are identified by all label bearing the wording, "Listed (Product)", a time interval, a serial number and the Warnock Hersey Certification Mark.
