Atwood AFSAD12 Manual técnico de instalação - Página 3
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All models can be installed in either a horizontal or vertical
position Horizontal installs must have the gas line positioned on
top, vertical installs must have vent located at the floor and gas
line on the right side.
Always install furnace exhaust system through an exterior wall.
DO NOT install furnace near tilt-out rooms, slide-outs, doors or
other projection that could obstruct furnace exhaust.
Locate furnace near midpoint of coach for single furnace
applications.
Installation must provide accessibility if any repairs are necessary
to the furnace. Failure to meet this requirement will create
additional labor costs that will be the responsibility of the installer.
DO NOT install vent in areas where projection or door openings
come within 6" of vent opening.
DO NOT install furnace in an area where wires, pipes or other
objects will interfere with installation or removal for servicing or
operation of furnace.
DO NOT install furnace on material that restricts return air, such
as directly on carpet, or soft material (like vinyl). If you must install
furnace on carpet or soft material, install furnace on cleats, or on
a wood or metal panel extending the full width and depth of
furnace plus minimum clearance to combustibles requirements.
DO NOT use petroleum or citrus base cleaner on plastic parts, as
damage may occur.
NOTE: The exhaust temperature of this furnace could discolor or
warp some materials. You should verify that the material used on
coach door, panel, or covers will not discolor, warp or burn from
the exhaust temperature whenever placed directly in front of vent.
CAUTION: Due to the differences in vinyl siding materials this
appliance should not be installed without first consulting with the
manufacturer of the siding or cutting the siding away from the
area around the appliance vent.
A gas-fired furnace for installation in a residential garage must be
installed so the burner(s) and the ignition source are located not
less than 18 in (457mm) above the floor and the furnace must be
located and protected to avoid physical damage by vehicles.
DO NOT use petroleum or citrus type cleaner on plastic parts, as
damage may occur.
CLEARANCE TO COMBUSTIBLES
Floorboards, walls & similar combustible building materials must
maintain clearances given and must be provided the full length and
width of the unit. Spacing is given based on the installed position of the
furnace.
Clearances
Top
Sides
Vertical or
1/2"
1/2"
Horizontal
Bottom (to
Blower (side
Rear
screw
cabinet
heads)
opening)
0"
1/2"
16 sq. in.
Spacing of 1/4" to ducting within 3 feet of furnace must be
provided unless UL listed wire bound vinyl ducts are used. All
ducting material must be rated for continuous use at minimum of
200°F.
Clearances are specifically for plywood or similar building
materials surrounding the furnace (i.e. Furnace should not be
located under furniture or in a closet space where clothing or
other material could be located).
Furnace efficiency rating is a thermal rating determined under
continuous operating conditions, independent of any installation.
Efficiency rate is given at 76% minimum; actual efficiency rating
may be higher.
Return air is supplied through openings in and around the
furnace. All return air passages must be kept clear for furnace to
function properly.
The total unobstructed return air opening size must not be less
than specified in these instructions. Failure to meet minimum
return air requirements nullifies furnace warranty.
To install without the additional 16 in
supply blower side of unit with 2" clearance full height length and
width of the unit.
REQUIRED DUCTING
All ducts in the table are four-inch ducts except for front discharge as
noted. Two-inch ducts cannot be used in place of one four. A front
discharge system using a five-inch duct requires no other ducts
maximum length 12".
Optional five-inch to four-inch adapter ducting can be purchased to
allow four-inch duct in addition (1) four-inch or (2) two-inch ducts must
also be used when using four-inch front option. Front duct must not
exceed 12".
FOR OPTIMAL PERFORMANCE:
Use the following ducting recommendations. Top Duct is used only in
addition to these requirements and is not allowed to be used until
these requirements are met. Additional ducting when added will reduce
the airflow through the ducting and improper ducting could cause poor
heating and or cycling on high temperature limit.
Horizontal or Vertical 4" Ducting; when using 4" ducting one
duct from each side must be used. Unless the front discharge is
used with either the 5" duct and grill or optional 4" ducting.
'No Bottom Discharge system allowed".
DISCHARGE AND DUCTING
Model
AFSA (12)
AFS (12) (16) (20)
AFSD12
Side Ducts
Front with Side
Ducting
Front Only 5"
duct
Front Only 4"
3
2
cutout on the blower side,
Required Discharge Area
FRONT GRILL or 15 in
2
24 in
Models
AFSD16
AFSD20
2
2
2
1
1
1
1
1
1
2
2
2
2
AFSAD12
X
X
1
X