Duct And Register Specifications; Vac Electrical Wiring - RV Products AIRXCEL 46413 Serie Instructions D'installation

be at the top. In this case, an installer
supplied gasket must seal between the unit
and the home underbody. The outlet air will
feed directly into the home supply duct in
this case. Remember to remove only the
blower shipping plate associated with the
outlet desired. Keep in mind that any home
skirting must be ventilated to allow free air
access to and from the condenser with
minimal recirculation.
GENERAL INFORMATION
All supply air ducts, registers, return air ducts, return air filters
and filter retainers must be supplied by the installer.
Any ducting (supply or return) exposed to a heat source or
outdoor environment must be sealed and insulated to prevent
heat gain and decreased system performance.
When ducting is attached directly to the air conditioner
cabinet, the installer must utilize the screw openings already
provided.
DANGER – SHOCK HAZARD
Drilling new openings and inserting screws may damage
either the refrigeration circuit or electrical wiring causing
possible equipment damage, personal injury or death. Do
not drill or cut any openings into the air conditioner.
Airxcel, Inc. strongly recommends that all air distribution
designs by tested by the home manufacturer. This is to ensure
that air volume, distribution and noise levels can be optimized.
GUIDELINES FOR SUPPLY AIR DUCTING
Total free area inside the supply duct can be no less than 42
square inches. Ducting with more free area can improve
system performance.
To decrease restriction and increase air flow, the ducting
should make as few bends and turns as possible. When
corners or turns are required, it is recommended that these
turns be radiused and as gradual as possible.
The supply duct, unless made of an insulating material, must
be insulated to prevent condensation from collecting on its
exterior. Moisture condensation within the ceiling or wall
1. WARNING – SHOCK HAZARD
To prevent the possibility of severe personal

6. DUCT AND REGISTER SPECIFICATIONS

7. 115 VAC ELECTRICAL WIRING

f) When pad mounting, the unit should be
flush with and under the home. Skirting
may be employed if it allows access to the
unit wirebox and does not interfere with free
air access to and from the condenser. Do
not allow the pad to contact any foundation
or home support member. This will prevent
unit vibration from entering the home.
g) Remaining duct adaptors (one tabbed and
one plate mounted) are for use in connecting
to the home as required.
cavity can damage insulation, stain vehicle interiors or create
odors. 1/8", 3 pound density fiberglass or closed cell foam
insulation has proven effective for this purpose.
Any ducting exposed to heat sources must be further insulated
to prevent significant performance degradation due to heat
gain. An example of an area capable of creating significant
heat gain is the roof area which can sometimes experience
temperatures of 160 degrees F. or more when exposed to
direct sunlight. For ducting in or near the ceiling, it is
impossible to provide "too much" thermal insulation.
GUIDELINES FOR SUPPLY REGISTERS
Total free area provided by the supply air registers should
equal a minimum of 72 square inches.
Free area is the size of the opening(s) that remain in a grille or
louvered panel after restrictions (the louvers) are subtracted.
Most metal and plastic grilles average 30% to 60% open. That
is the actual "free area" for the grille will be 30% to 60% of
the total opening area.
GUIDELINES FOR RETURN AIR
DUCTING AND FILTERS
All return air must be filtered. A 1-inch thick disposable
fiberglass filter is recommended. A washable filter is
acceptable if supported by a mesh or grille to prevent collapse.
Should the return air filter and filter retainer be located in the
floor, a traffic duty grille will be required. The return air filter
should be located in an area where:
a) drapes or bed sheets cannot block the
opening;
b) the consumer can gain easy access for
servicing.
injury or equipment damage due to electrical
shock, always be sure the electrical power is
disconnected or off before beginning installation.
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