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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. Remove flange screws and detach flanges from damper casing. Ensure wall penetration is correct size. Opening should be to AS1682.2-1990 Clause 'C'.

3. Wrap damper with suitable high temperature insulation and slide into wall penetration. NOTE: Dampers are clearly labelled with "AIRFLOW" direction and "TOP" of unit.

4. Replace flanges, making sure that damper is firmly fixed within the wall. NOTE: Do not overtighten flange screws.

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

6. 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.)