Rigid Wall or Floor Construction (CSS)


This method of installation is effectively suitable for most wall types of rigid construction, where they are of an equal or greater density to the lightweight board partition tested. Details shown are essentially for an existing dry wall partition. However this installation method may be used for masonry or block work walls or concrete floors, as long as they have a greater density than the partition shown. Also a drywall partition may be built around the damper, as long as the clearances are followed.

Damper Installation Method

  1. Measure the overall damper casing diameter. Calculate the finished square hole size by adding 10mm ± 5mm to both width and height (For drywall partitions, calculate the hole to cut size by adding two board thicknesses to the finished hole width and height).
  2. Mark out the hole on the partition and cut it out, cutting the top and bottom edges first to maintain stability.
  3. For drywall partitions, frame out the hole with stud and track and cover this with board. Finish edges with joint filler.
  4. Install the damper and fasten one Installation Flange so that the blade in it’s closed position is in the centre of the wall.
  5. Fill the 4 triangular voids between the damper and the edges of the hole with fire rated stone wool.
  6. Fit the remaining Installation Flange

Actuator Fitting (If required)

  1. The control mode/actuator should then be fitted using the instructions supplied with it.
  2. Using the supplied drilling template, drill into the ductwork and fit the Electrical Thermal Release (ETR) into the duct (as good practice, this should be towards the top of the duct).
  3. A special feature of the actionair SmokeShield modes is that they may be adjusted from pointing straight out along the duct (standard configuration) through 90° to point either up or down if required.
  4. The mode should be wired into the system using the site wiring detail, plus the details shown on the label. Note: If the mode/actuator fitting instructions are missing, please contact the actionair sales office.


The procedure detailed under periodic maintenance should be followed.

Periodic Maintenance

See periodic maintaince.


  1. The manually resettable fire damper should be carefully inspected, cleaned and lubricated with light oil, if required, released and reset.

  2. The motorised fire damper control mode should be operated to ensure that it is moving the blades from open to close and vice versa.

  3. If the end switches (in the control mode) are being used, it must be checked at commissioning stage that they are actually indicating that the blades are open or closed. If using an automatic control system this can be achieved by running a test cycle and checking the blades (open and closed) and the status indication at the control system. 

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