Toa IR-820SP Operating Instructions Manual page 12

Step 3. Place the supplied reinforcement ring on the ceiling
panel.
Fold the reinforcement ring in half* and insert it
through the mounting hole in the ceiling panel.
* The reinforcement ring is too large to be inserted
into the mounting hole unless folded.
Then open it with its tabs facing up.
Place the ring on the ceiling panel aligning it with
the mounting hole.
Step 4. Attach the ceiling reinforcement ring to each tie-
plate using 2 reinforcement ring mounting screws.
If the ceiling reinforcement ring does not line up
accurately with the ceiling mounting hole, adjust its
position by either loosening the tie-plate mounting
screws and sliding the tie-plate into correct position,
or by shifting the tie-plate mounting screws to the
appropriate holes in the Tile Bridge rails.
The ceiling reinforcement ring can be moved in the
direction indicated by the arrows.
Note
Be sure to tighten the tie-plate mounting screws
after completing the adjustment.
12
Reinforcement ring placed on the ceiling panel
Reinforcement ring mounting screw
1
Tie-plate
Ceiling reinforcement ring
Tie-plate mounting screw
Mounting hole
Ceiling reinforcement ring
(accessory)
These tabs must
face upward,
away from the hole.
2
Fit closely to the back surface
of the ceiling panel.
Tie-plate
Ceiling reinforcement ring