Peerless-AV PC932C-W - Installation - Manual (Page 6)

6 of 35 ISSUED: 11-29-07 SHEET #: 202-9263-2 08-17-11
Installation to Concrete Ceilings
• Concrete must be 2000 psi density minimum. Lighter density concrete may not hold concrete anchor.
• Make sure that the supporting surface will safely support the combined load of the equipment and all attached hard-
ware and components.
• Always attach concrete expansion anchors directly
to load-bearing concrete.
• Never attach concrete expansion anchors to
concrete covered with plaster, drywall, or other
fi nishing material. If mounting to concrete surfaces
covered with a fi nishing surface is unavoidable (not
evaluated by UL), the fi nishing surface must be
counterbored as shown below. Be sure concrete
anchors do not pull away from concrete when
tightening screws. If plaster/drywall is thicker than
5/8" (16 mm), custom fasteners must be supplied by
installer (not evaluated by UL).
Place ceiling plate (A) on ceiling as a template and
mark the center of the two mounting holes.
Note: Opening in outer channel indicates the front
of the mount.
Drill two 5/16" (8 mm) dia. holes to a minimum
depth of 2.5" (64 mm). Attach ceiling plate (A) using
two concrete anchors (I) and two #14 x 2.5" wood
screws (H) as shown in fi gure 2.3. Tighten wood
screws (H) until ceiling plate (A) is fi rmly attached.
H
A
I
2
fi g. 2.3
B
OPENING ON
OUTER CHANNEL
(B) INDICATES
FRONT OF MOUNT
WARNING
• Tighten wood screws fi rmly, but do not overtighten.
Overtightening can damage the screws, greatly
reducing their holding power.
• Never tighten in excess of 80 in • lb (9 N.M.)
WARNING
WARNING
1
3
I
Drill holes and insert anchors (I).
Place plate (A) over anchors (I) and secure with screws (H).
Tighten all fasteners.
2
I
A
H
concrete
surface
CUT
A
W
A
Y
VIEW
INCORRECT CORRECT
wall
plate
wall
plate
plaster/
dry wall plaster/
dry wall
concrete concrete
CONCRETE CEILING