SeaMach 24 VDC
Rooftop Air Conditioners
SeaMach 24 VDC Rooftop Air Conditioner Installation Manual 5/2013
Page 5 of 20
Examine the roof opening. If the opening is smaller than 14” x 14” (35.6 cm x 35.6 cm), the
3.
opening must be enlarged. If the opening exceeds 15” x 15” 38 cm x 38 cm), a mounting frame
must be field fabricated to reduce the opening size (See Figure 1).
If a roof vent opening is not used, a new opening (See Figure 1) will have to be cut into the vehicle
B.
roof. A matching opening will also have to be cut into the interior vehicle ceiling. Be careful when
cutting the ceiling opening.
After the opening in the roof and interior ceiling are the correct size, a framed support structure must
be provided between exterior roof top and interior ceiling. The reinforced framed structure must
provide the following guidelines:
Capable of supporting both the weight of the roof top air conditioner and the interior ceiling
1.
assembly.
Capable of holding or supporting the roof outer surface and interior ceiling apart, so that when the
2.
roof top air conditioner and ceiling assembly are bolted together, no collapsing occurs.
Airxcel’s SeaMach air conditioner requires that the spacing from the vehicle roof top to the interior
ceiling be no less than 1” (2.34 cm). A typical support frame is shown in Figure 1.
The frame must provide an opening 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” (61 cm)of supply wiring through the support frame (working length).
After the support frame is installed, seal off
all gaps
between the frame and both the roof exterior
and the interior ceiling of the vehicle or vessel (cavity walls). Additionally, seal the gap around the
electrical supply wiring.
This air conditioner is to be installed in accordance with NFPA Standard 501C.
C.
The roof top air conditioner must be mounted as near level from front to rear and side to side as is
D.
possible when the vehicle is parked on a level plane. Figure 2 shows maximum allowable degree
deviations (mounting degrees from total surface flat plane).
