Extron Electronics PCM 240 - Manual (Page 2)

2
PCM 240 • Installation Guide (Continued)
f. Using these dimensions, mark and cut a hole (using a 2 inch hole saw) for
the projector pipe in the removed ceiling tile (see figure 3).
g. If required, to prepare the ceiling tile for a power outlet, use the PCM
plate to trace and cut out the 2-gang hole in the ceiling tile for a
UL approved RACO
® junction box.
If this is not required, proceed to step 3.
Step 2 — Install the Electrical Box.
The following method is recommended for integrating a RACO electrical box
(not supplied) on the PCM base plate. A RACO box (#8471), an MK box, or
standard UL electrical boxes can be inserted. Mounting holes for Extron
3 inch deep, ¼ rack wide devices are also included.
Install the RACO box on the PCM plate as follows:
a. Attach the box to the plate, using the smallest notches in opposite corners
of the cut-out. Do not tighten the screws fully at this time.
b. On the room side of the tile, slide the plaster ring under the screws.
c. Fully tighten the screws
WARNING: 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.
Step 3 — Secure the PCM Base Plate to the Ceiling.
Tie wire installation
a. Replace the cut ceiling tile, checking the orientation.
b. Replace the PCM base plate over the ceiling tile and align the hole with
the PCM adapter plate.
c. Attach the four turnbuckles to the mounting plate, one at each corner.
ATTENTION: 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.
d. Mark and drill four holes, approximately 1¼ inch (32 mm) deep into 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). Minimum suitable joist size should be
2 inches by 4 inches.
e. Install appropriate anchors or lag eye bolts for the structural ceiling into
each drilled hole.
Attach turnbuckles
to long sides.
T-bar Securing
Screws
Pipe Adapter Plate
Lock Nuts
10
Attach ceiling
anchors and wire
10 degrees from
vertical.
T-bar
Mounting Plate
Underside
Top Side
Figure 3. Mark and start cutting on
underside. Finish on top
side.
Figure 4. RACO and MK Box
Installation Points.
Figure 5. Attach Tie Wire and Safety
Cable.
1-gang and 2-gang
Electrical Box Cut-outs
3" Deep, ¼ Rack
Device Mounting Holes
Raco and MK Box Cut-out