Ceiling Radiation Damper Installation Detail

A ceiling radiation damper closes automatically to restrict the passage of heat.

Ceiling radiation damper installation detail.

Minimum flanges located 1 inch to 3 inches from and on both sides of a steel duct drop and these channels are suspended by 12 swg wire from. The ceiling damper and diffuser neck may be directly connected to the steel duct drop see figure 3 detail c. The ceiling damper may be connected directly to the diffuser neck. 2 ceiling radiation damper may be connected directly to the grille and supported by hanger straps see detail e or note.

They are used to protect hvac openings in fire rated horizontal ceiling assemblies. For ceiling radiation dampers however since ceiling radiation dampers serve a somewhat different purpose than the other damper types there is often confusion about where a ceiling radiation damper should be used. Static ceiling radiation dampers models mrcd mscd mscdsb mccd ceiling radiation dampers covered under ul 555c intended for installation in hourly rated fire resistive floor ceiling and roof ceiling assemblies in accordance with the standard for fire tests of building construction and materials ul 263. Download pdf installation guides for lloyd industries fire dampers smoke dampers ceiling radiation dampers combo smoke and fire dampers and more.

Ceiling fire dampers also known as radiation dampers are designed and tested to limit the radiant heat transfer through an air inlet outlet opening in the ceiling membrane of a fire resistance rated floor ceiling or roof ceiling assembly. 5 ceiling radiation dampers dampers supported from ductwork above note about support when main ducts are supported by 16 ga. When it is necessary to install the ceiling damper more than 3 3 4 from the finished ceiling an additional application of. A 12 x 12 305mm x 305mm nominal ceiling radiation damper could have a maximum ceiling membrane opening of 13 x 13 330mm x 330mm.

The ceiling damper shall be attached to a minimum 22 gauge 0 85 steel sleeve duct drop by welding or with rivets or with 10 m5 sheet metal screws or with quick lock or bolted. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly. Ceiling radiation dampers are available in butterfly style and curtain style. Let s examine the protection provided by each type of damper.

The connection of the ceiling radiation damper diffuser neck and steel duct drop see connection notes section on page 3 may be satisfied in two ways. Up to 3 hour ceiling radiation damper installation instructions c e i l i n g r a d i a t i o n d a m p e r s i c f d 1 5 m 6 1 0 2 7 1 a p r i l 2 0 2 0 a. To better understand ceiling radiation dampers.