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1. INITIAL DAMPER TEST - Before installing Damper into wall, check damper's closing operation. This can be achieved by removing UL33 rated fusible link. Hold the damper in a stable upright position, then using the link strap or the "cricket bat", push the blade vertically to the top. This will clear the blade over the two locking tabs. Pivot the blade back against the stainless steel spring(s) to the fully open position, then let the blade close and lock. Replace fusible link and close link strap.

2. Ensure wall penetration is correct size. Penetration size for this type of installation should be 10mm larger than width and height dimension. As per AS1530 Test Number FSV0538.

3. Remove flange screws and detach flanges from casing.

4. Apply a 20mm bead of fire rated mastic to base of penetration. Apply a 6mm bead of fire rated mastic to both edge faces of plasterboard surface (see illustration).

5. Slide damper in wall penetration and apply a 5mm bead of fire rated mastic into side gaps. Apply a 10mm x 5mm x 2 beads of fire rated mastic in gap above damper (see illustration). NOTE: Dampers are clearly marked with "AIRFLOW" direction and "TOP" of unit.

6. Replace flanges with a bead of fire rated mastic around penetration where angles seal against plasterboard. NOTE: Do not overtighen flange screws.

7. Repeat INITIAL DAMPER TEST as outlined in point #1.

8. Connect ductwork to fire damper using fire rated mastic to fill recess if using raw edge connection, or apply mastic to both surfaces of the TDF flange connections. (Bolts must be of a low melting point material.)