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1. INITIAL DAMPER TEST - Before installing damper into slab, check damper's closing operation. This can be achieved by placing damper into its installation position. Hold blade clips down to release blades, and open them to the fully open position. Release blades and let them drop to the closed position.

2. Ensure slab penetration is correct size. Opening should be 26mm larger than normal size in both width and height. Refer AS1682.2-1990 Appendix 'C'.

3. Remove bottom flanges and slide damper down into penetration. NOTE: All dampers are clearly marked with "TOP" and "AIRFLOW DIRECTION" orientation labels, these must be adhered to.

4. From underneath of slab reattach bottom flanges sealing between the flanges and slab as shown on diagram with approved fire rated mastic. NOTE: do not overtighen flanges screws/bolts.

5. From top of damper, remove 2x opposing side flanges and pack the expansion gap completely with an approved high temperature ceramic fibre insulation. Replace flanges, sealing between the flanges and slab with an approved fire rated mastic. Repeat this method with the last 2x opposing flanges.

6. Repeat INITIAL DAMPER TEST as described in point #1. Should all operations be alright, release the blades from retaining clips and attach blades to rated fusible link supplied.

7. 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.)