Ceiling Radiation Damper Installation Detail

X 11 2 in.

Ceiling radiation damper installation detail. Steel channels with 9 16 in. 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. The ceiling damper and diffuser neck may be directly connected to the steel duct drop see figure 3 detail c. Let s examine the protection provided by each type of damper.

The ceiling damper may be connected directly to the diffuser neck. They are used to protect hvac openings in fire rated horizontal ceiling assemblies. 2 ceiling radiation damper may be connected directly to the grille and supported by hanger straps see detail e or note. 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.

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. A ceiling radiation damper closes automatically to restrict the passage of heat. To better understand ceiling radiation dampers. Opening in ceiling membrane see page 1 may be up to 1 25mm larger than the nominal size of the ceiling radiation damper i e.

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. When it is necessary to install the ceiling damper more than 3 3 4 from the finished ceiling an additional application of. 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. 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.

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. Ceiling radiation dampers are available in butterfly style and curtain style. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly.