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2.
It may be necessary to seal some of the old
roof vent mounting screw holes which may
fall outside of the air conditioner basepan
gasket.
3.
Examine the roof opening. If the opening is
smaller than 14" x 14", the opening must be
enlarged.
B.
If a roof vent opening is not used, a new opening
(See Figure 1) will have to be cut into the vehicle
roof. A matching opening will also have to be cut
into the interior vehicle ceiling. If the ceiling
opening is carpeted, snagging could occur. After the
opening in the roof and interior ceiling are the correct
size, a framed support structure must be provided
between the exterior roof top and interior ceiling.
The reinforced framed structure must provide the
following guidelines:
1.
Capable of supporting both the weight of
the roof top air conditioner and the interior
ceiling assembly.
2.
Capable of holding or supporting the roof
outer surface and interior ceiling apart, so
that when the roof top air conditioner and
ceiling assembly are bolted together, no
collapsing occurs.
Airxcel, Inc. recommends that the spacing from the
vehicle roof top to the interior ceiling top be no less
than 1". A typical support frame is shown in
Figure 1.
The frame must provide an opening through the
frame to allow passage for the power supply wiring.
Route the supply wiring through the frame at the
same time the support frame is being installed.
IMPORTANT – Allow 24" of supply wiring
through the support frame (working length).
ALLOWABLE OFFSET FOR ALL AIR CONDITIONERS WITH ROTARY COMPRESSORS
After the support frame is installed, seal all gaps
between the frame and both the roof exterior and the
interior ceiling of the vehicle (cavity walls).
Additionally, seal the gap around the electrical
supply wiring.
C.
The air conditioner must be mounted as near level
from front to rear and side to side as is possible when
the vehicle is parked on a level plane. Figure 2
shows maximum allowable degree deviations
(mounting degrees from total surface flat plane).
FIGURE 2
4
FIGURE 1
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