- Measure the overall damper casing size, include the PTC shroud, but do not include the peripheral flange.
- Calculate the finished hole size by adding 25mm ± 5mm to both width and height.
- Calculate the hole to cut size by adding two board thicknesses to the finished hole width and height.
- Mark out the hole on the partition and cut it out, cutting the top and bottom edges first to maintain stability.
- Frame out the hole with stud and track and cover this with board. Finish edges with joint filler.
- Drill clearance holes in the damper flange at 150mm centres and such that they will allow screws to pull into the stud and track around the hole.
- Install the damper and fasten.
- Back fill with mineral/stone wool and patress over this down to the spigot.
Vertical in Masonry Wall - DWFX-F
- Drill suitable clearance holes in the damper flange at 150mm centres.
- Position damper in to the aperture.
- Using M4 x 38mm (MIN) fire rated fixings, secure damper back to structure through the clearance holes in the damper flange.
- Back fill gaps to the rear with mineral/stone wool (min 45Kg/m³), and retain using steel retainers angles (this is not required if the damper is a tight fit with no gaps requiring back filling).
Vertical in Dry or Masonry Wall with Ablative BATT Penetration Seal - DWFX-F
(1 & 2 only for dry walls)
- Mark out the hole on the partition and cut it out, cutting the top and bottom edges first to maintain stability
- Frame out the hole with stud and track and cover this with 2 layers of board. Finish edges with joint filler.
- Suspend the damper from the ceiling, using 10mm studding drop rods
- Make sure the area within the aperture and the damper casing is free from any debris and remove any dust.
- Where the coated BATT will contact the surrounding aperture apply Rockwool acoustic intumescent sealant to the outer edges of the BATT or Fire Pro glue. Where two coated BATTS are in contact, use Rockwool fire pro glue as the joint adhesive. In both cases ensure that an even cover is achieved over the entire thickness of the BATT.
- Continue installation of Rockwool ablative coated BATT until aperture is completely filled.
- Apply a bead of Rockwool acoustic sealant to both sides of the wall, approximately 10mm wide, around perimeter of the aperture between dry wall and BATT, ensuring that any gaps between the BATT and surrounding edges are fully filled.
- Allow 12 hours for BATT penetration seal to cure.