Toa PC-1867FC - Manual (Page 2)

Fire dome
Dome mounting
bracket
Important
Unscrew the dome mounting thumbnut
until it reaches the end of the screw shaft.
3. INSTALLATION
Step 1. Using the supplied paper pattern as a guide, open a 156 mm
±3 mm mounting hole in the ceiling panel.
Step 2. Punch out the knockout hole in the fire dome, then install the
supplied cable entry rubber grommet in the knockout hole.
Note: The grommet's cable entry hole is covered with a thin
membrane. Cut a hole in the membrane to match the
size of the speaker cable used.
Step 3. Loosen the dome mounting thumbnut.
[Interior View] [Cross-Section View]
Ceiling
ø156 ±3 mm
Max. 30 mm
Fire dome
ø20 mm knockout hole
(2 places)
Dome mounting bracket
Dome mounting thumbnut
Dome mounting
bracket
Push up the dome assembly pressing
the bracket sides with your fingers.
Each leg should settle
on the collar.
Caution
Since the dome mounting bracket is not placed on the
ceiling panel at this stage, as shown in the above figure,
the dome could fall if released, so continue to provide
manual support.
Step 6. Push in the dome mounting thumbnut.
Firmly push the thumbnut and screw shaft
in the direction indicated by the arrow.
Dome mounting
thumbnut
A A
The legs of the dome mounting bracket will pop open
and settle on the back surface of the ceiling panel,
providing the dome with partial support. If released, a
gap behind the collar of the dome will result (A).
Step 7. Turn the dome mounting thumbnut clockwise to tighten and firmly secure the dome to the ceiling panel.
Dome mounting thumbnut Tighten fully for a secure installation.
Fire dome
Dome mounting bracket
Step 4. Feed the speaker cable through the rubber grommet into the dome interior.
Step 5. Press the fire dome assembly into the previously prepared hole in the ceiling.