3
IMPORTANT
TO PREVENT DAMAGE TO THE WIRING AND
BATTERY, DISCONNECT THE BATTERY CABLE
FROM THE POSITIVE BATTERY TERMINAL BEFORE
PERFORMING ANY CUTTING TO THE VEHICLE.
Once the location for your heat pump has been
determined (See Section III), a reinforced and framed
roof hole opening must be provided (may use existing
vent hole). Before cutting into the vehicle roof, verify that
the cutting action will clear all structural members and
crossbeams. Additionally, the location of any inner roof
plumbing and electrical supplies must be considered.
A.
If a roof vent is already present in the desired
mounting location for the heat pump, the following
steps must be taken.
1.
Remove all screws which secure the roof vent to
the vehicle. Remove the vent and any additional
trim materials. Carefully remove all caulking from
around the roof opening to obtain clean exterior
roof surface.
2.
It may be necessary to seal some of the old roof
vent mounting screw holes which may fall outside
of the heat pump basepan gasket.
3.
Examine the roof opening. If the opening is
smaller than 356mm x 356mm, 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 heat pump 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 heat pump 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
25mm. 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.
C.
The heat pump must be mounted as near level front
to rear and side to side as possible when the vehicle
is parked level. Figure 2 shows the maximum
allowable degree deviations.
IMPORTANT
– Allow 600mm 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
supply wiring.
If the roof of the vehicle is sloped such that the heat
pump cannot be mounted within the maximum allowable
degree deviations, an exterior leveling shim will need to
be added to make the unit level. A typical front to back
leveling shim is shown in Figure 3.
Once the heat pump has been leveled, some
additional
shimming may be required above the
interior ceiling
assembly. The heat pump and
the interior ceiling
assembly must have a squared
installation relationship
before they are secured
together.
D.
After the mounting hole is properly prepared, remove
the carton and shipping pads from around the heat
pump.
Carefully
lift the unit to the top of the vehicle.
Do not use the outer plastic shroud for lifting. Place
the heat pump over the prepared mounting hole.
The pointed end (nose) of the shroud must face
towards the front of the vehicle. Pull down all loose
electrical connectors from the heat pump through
the mounting opening and let hang.
25 mm
MINIMUM THICKNESS
356 to 381 mm
356 to 381 mm
HOLE FOR WIRES
TYPICAL ROOF OPENING
FIGURE 1
SIDE TO SIDE DEVIATION
FRONT TO BACK DEVIATION
LEVEL TO 15° LEFT SIDE HIGH PERMISSIBLE
LEVEL TO 15° NOSE HIGH PERMISSIBLE
FIGURE 2
SIDE TO SIDE DEVIATION
FRONT TO BACK DEVIATION
LEVEL TO 15° LEFT SIDE HIGH PERMISSIBLE
LEVEL TO 15° NOSE HIGH PERMISSIBLE
HEIGHT VARIES
TO MAKE
UNIT LEVEL
356 mm
356 mm
FIGURE 3