Installation; Drop Ceiling Mount - American Dynamics AD1273 CobraDome Installation And Operation Instructions Manual

INSTALLATION

INSTALLATION

Drop Ceiling Mount

The weight of the AD1273 unit requires additional support of
the dropped ceiling grid. This additional support provides a
stable, vibration free platform and ensures that the unit not
move during unrelated repairs to the ceiling.
Before installing the AD1273, strengthen the ceiling grid by
affixing four (minimum) lengths of bailing wire from the
corners of the grid T-rails to the building frame directly above
the AD1273 installation site (see Figure 11). Cut these support
wires to a length such that no slack exists between the building
frame and the ceiling grid.
One safety hook is provided with the AD1273 for connecting a
safety chain between the building frame and the chassis
housing (see Figure 11). This chain prevents the AD1273
from falling should anything happen to the ceiling grid. Cut
the safety chain to a length such that no slack exists between
the building frame and the chassis housing.
NOTES: For a 2 ft. x 2 ft. ceiling grid, an optional, precut
aluminum tile houses the AD1273 assembly and
replaces the original tile.
For a 2 ft. x 4 ft. ceiling grid, an optional, precut
aluminum tile houses the AD1273 assembly. The
original 2 ft. x 4 ft. tile must be reduced to a 2 ft. x
2 ft. tile. A two-foot T-rail is provided to support
the seam between the aluminum tile and the
original tile.
Bulding Frame to
Chassis Housing Safety
Chassis
Housing
Drop Ceiling T-rail Grid
Figure 10 - Corner Support Installation Pattern
Drop Ceiling
Support Points
(4 Total)
Eye-Bolt
Corner Support
Brackets
1) Determine the ceiling tile for the AD1273 installation.
Obtain adequate working space by removing that tile and
two or three tiles immediately surrounding it.
2) Determine a location in the building frame centered above
the intended installation site for securing a safety chain to
the AD1273 chassis housing (see Figure 11).
3) Verify that the ceiling grid T-rails immediately
surrounding the intended installation location are secured
to the building frame with safety wires.
These wires must be snug between the building
!
frame and the ceiling grid BEFORE the additional
weight of the AD1273 is added.
4) Cut an 11.25-inch diamond into the center of the ceiling
tile used to mount the AD1273.
Assemble the chassis housing, safety hook, corner support
brackets, housing flange, and ceiling tile on the floor.
5) Secure the safety hook to the top of the chassis housing.
6) Bolt the four corner support brackets (provided) to the
corners of the chassis housing (see Figure 10).
7) Fit the chassis housing into the ceiling grid.
8) Suspend the chassis housing with a chain (not provided)
between the building frame and the safety hook.
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AD1273