Duct Fire Damper Installation

Duct sleeve connections listed in ul 555 sixth edition standard for fire dampers 2. 2 1 2 stud or runner 1 2 gypsum wallboard retaining angle damper sleeve fire damper duct 1 2 thick filler pieces 2 1 2 wide to be installed around. These holes should line up with the pre drilled holes on the damper.

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Fasteners may be used as followed.

Duct fire damper installation.

Open up the duct work and drill two holes on opposite edges of the tube. Then seal both sides with duct tape. Optional installation where the damper is larger than the opening in the floor and the damper is mounted on the bot tom side of the floor a minimum of 11 2 x 11 2 x 20 gage steel 38 x 38 x 1 0 mounting angle is required on the top. Joints using connections shown in 1.

Above with a maximum of two 10 sheet metal screws on each side and on. Wall rating 2 hr. Remove the fasteners from the damper connect it to the duct through these holes and into the drilled holes and tighten. Fire damper installation operation maintenance instructions iom fire dampers 0718 nca manufacturing inc.

The retaining angles on both sides of the fire damper may be inverted in order to accomodate a register or grille. Detail of opening preparation and fire damper installation. Cut out the section where you plan to install your air duct damper with your tin snips fix the section of duct you removed back in place pop your air damper in between these duct sections position the junction box so it covers the electrical wires going to the power source per manufacturer s instructions.

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