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PCM 340 • Installation Guide (Continued)
Measure the distances X and Y (see figure 2) from the inner vertical
e.
section of the front and left T-frame runners to the center of the Pipe
Adapter Plate.
Using these dimensions, mark and cut a hole (using a 2 inch
f.
hole saw) for the projector pipe in the removed ceiling tile (see figure 3).
If required, to prepare the ceiling tile for a power outlet, use the PCM
g.
plate to trace and cut out the 2-gang hole in the ceiling tile for a
UL approved RACO
If this is not required, proceed to step 3.
TIP:
Install any optional power outlets in the 2-gang opening on the
mounting plate, towards the outside edge of the mount, so
they do not interfere with the PMK 550 when installed.
Step 2 — Install the Electrical Box.
The following method is recommended for integrating a 4S RACO electrical
box (not supplied) on the PCM base plate (such as a RACO 231, 2 1/8 inch
deep, 4 x 4 inch electrical box and a RACO 778, 1/2 inch raised, 4 x 4 inch
plaster ring.
Install the RACO box on the PCM plate as follows:
Attach the box to the plate, using the smallest notches in opposite
a.
corners of the cut-out (see figure 4). Do not tighten the screws fully
at this time.
On the room side of the tile, slide the plaster ring under the screws.
b.
Fully tighten the screws
c.
WARNING:
NOTE:
If installing a single-gang electrical box, use a Raco 503
junction box�
Step 3 — Secure the PCM Base Plate to the Ceiling.
Tie wire installation
Replace the cut ceiling tile, and temporarily replace the PCM base plate
a.
over the ceiling tile.
Check the orientation and tile hole alignment hole(s) with the PCM
b.
adapter plate by pushing the slotted pipe up through the hole into the
adapter plate.
When adequately satisfied the plate and hole align, remove the pipe.
c.
Attach the four turnbuckles to the mounting plate, one at each corner.
d.
ATTENTION:
Mark and drill four holes, approximately 1¼ inch (32 mm) deep into
e.
the ceiling joists, using a 1/4 inch (6.4 mm) diameter drill bit. Do this at
10 degrees out from vertical. Drill a fifth hole centered above the PCM
for the safety cable (see figure 5). The minimum joist size used should
be 2 inches by 4 inches.
2
junction box.
®
Risk of Personal Injury. For safety, complete all wiring
of the electrical boxes and accessories after the plate
is installed and secure.
All electrical installation should be done by a qualified
electrician.
Risk of Personal Injury and property damage.
• DO NOT rest or lean on the mounting plate or
suspended ceiling when attaching the turnbuckles
and tie wire, or when drilling into the ceiling.
• For safest installation, insert the turnbuckle from
the outside so that it hooks inwards.
Underside
Mark and start cutting on
Figure 3.
underside. Finish on top
side.
Use the smallest
notches when
attaching the
Raco box.
Install RACO Box and
Figure 4.
Plaster Ring.
Attach safety cable
to center holes and
secure with cable
clamps.
Drill holes and
attach tie wires
10° out from
vertical.
o
10
Attach tie wire
to the turnbuckles
and eye bolts.
Attach Tie Wire and Safety
Figure 5.
Cable.
Top Side
Raco 231
Raco 778
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