Ceiling Radiation Damper Installation Detail

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 damper installation detail.

2 ceiling radiation damper may be connected directly to the grille and supported by hanger straps see detail e or note. 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. To better understand ceiling radiation dampers. When it is necessary to install the ceiling damper more than 3 3 4 from the finished ceiling an additional application of.

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. 5 ceiling radiation dampers dampers supported from ductwork above note about support when main ducts are supported by 16 ga. Operated by a fuse link these dampers come spring loaded and are available with an easy access assembly.

A ceiling radiation damper closes automatically to restrict the passage of heat. The ceiling damper may be connected directly to the diffuser neck. Steel channels with 9 16 in. 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.

Ceiling radiation dampers are available in butterfly style and curtain style. 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. 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. They are used to protect hvac openings in fire rated horizontal ceiling assemblies.

Download pdf installation guides for lloyd industries fire dampers smoke dampers ceiling radiation dampers combo smoke and fire dampers and more. The ceiling damper and diffuser neck may be directly connected to the steel duct drop see figure 3 detail c. X 11 2 in.