Atwood 8520 Manuel d'installation technique - Page 2

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MINIMUM CLEARANCE TO
FLOORBOARDS, WALLS & SIMILAR COMBUSTIBLE BUILDING MATERIALS*
MUST BE PROVIDED THE FULL LENGTH AND WIDTH OF UNIT
------1/2˝
HORIZONTAL
TOP AND SIDES
------1/2˝
VERTICAL
TOP AND SIDES
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
should be rated for continuous use at 200˚F.
: Clearances are specifically for plywood or similar building
NOTE
materials surrounding furnace (i.e. furnace should
under furniture or in closet space where clothing or other material
could be located.)
: Furnace efficiency rating is a thermal rating determined under
NOTE
continuous operating conditions, independent of any installation. Efficiency
rate is given at 77% minimum, actual efficiency rating may be higher.
*When furnaces are installed to minimum clearances, an additional 16
in
2
of return air must be provided to blower side of furnace, or a 2˝
clearance the full length and height on blower side must be

CARBON MONOXIDE POISONING

Furnace must be installed and vented to these instructions.
•
Improper installation, adjustment, alteration, service or mainte-
•
nance can cause injury or property damage.
Improper installation location may cause furnace to produce neg-
•
ative pressure, affecting combustion air or venting of other appli-
ances.

CRITICAL INSTALLATION WARNINGS

install furnace on material that restricts return air, like carpet
DO NOT
•
or any soft material such as vinyl.
install furnace where clearance to combustibles cannot be
•
DO NOT
maintained.
modify furnace in any way.
DO NOT
•
alter furnace for a positive grounding system.
DO NOT
•
HI-POT furnace unless electronic ignition system (circuit
DO NOT
•
board) has been disconnected.
use battery charger to supply power to DC model furnace
DO NOT
•
even when testing.
use 120 volt AC current with DC models.
DO NOT
•
use furnace cabinet area as a storage compartment.
DO NOT
•
vent furnace with venting system serving another appliance.
DO NOT
•
vent furnace to an outside enclosed porch area.
DO NOT
•
use for temporary heating of buildings or structures under
DO NOT
•
construction.
Protect building materials from degrading from flue gas exhaust.
•
Protect furnace electrical components from water.
•
-
USA AND CANADA
FOLLOW ALL APPLICABLE STATE AND LOCAL CODES
IN THE ABSENCE OF LOCAL CODES OR REGULATIONS
Recreation Vehicles ANSI A119.2/NFPA 501C.
•
National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149
•
Installation Codes
Federal Mobile Home Construction & Safety Standard, Title 24 CFR,
•
part 3280, or when this Standard is not applicable, the Standard for
Manufactured Home Installations (Manufactured Home Sites,
Communities and Set-Ups), ANSI A255.1 and/or CAN/CSA-Z240 MH
Series, Mobile Homes.
Ground-National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1
•
Park Trailers ANSI 119.5
•
--1˝
--3/16˝
REAR
BOTTOM
--1˝
------0˝(
REAR
BOTTOM
be located
NOT
maintained.
WARNING
-
,
REFER TO CURRENT STANDARDS OF
: The direct high voltage spark ignition generates a radio frequency
NOTE
that could cause interference with other microprocessor based
equipment. Locate equipment at least five feet (5') from furnace
location. If this distance cannot be maintained, purchase MPD 37773
)
SLIDE PLATE
(a shielded high voltage lead).
CARBON MONOXIDE POISONING
Properly seal door, adjust draft cap (
•
vent assembly) to prevent carbon monoxide from entering coach.
draw
DO NOT
•
air into the living area or an enclosed porch.
Return air is supplied through openings in furnace casing. All return
air passages must be kept clear for furnace to function properly. Refer
to
MINIMUM CLEARANCE TO FLOORBOARDS
. The total unobstructed return air opening size(s) must
MATERIAL
than specified in
LESS
minimum return air requirements nullifies furnace warranty.
STANDARD FURNACE INSTALLATION
General Installation -
Install furnace through an exterior wall.
•
install furnace near tilt-out rooms, slide-outs, doors or
DO NOT
•
other projections that could obstruct furnace exhaust.
Locate furnace near midpoint of coach for single furnace applications.
•
install vent in areas where projections or door openings
DO NOT
•
come within 6˝ of vent tube opening.
install furnace in an area where wires, pipes, or other
•
DO NOT
objects will interfere with installation or operation of furnace.
It is not recommended to 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 fur-
•
nace on cleats, or on a wood or metal panel extending the full
width and depth of furnace plus minimum clearances to combustibles.
DO NOT use petroleum or citrus type cleaners on plastic parts, as
•
damage may occur.
WALL CUTOUT OPTIONS
RECOMMENDED WALL THICKNESS
DO NOT OVERSIZE HOLE
EXTERIOR WALL CUTOUT
HORIZONTAL
VERTICAL
RECESS BEZEL
*
:To cut rounded corners: with radius blocks 2-1/8˝ radius
RECESS BEZEL
allow furnace tabs to protrude through side wall cutout
DO NOT
•
opening during installation process until door is installed and tabs
:
are bent over. Tabs have sharp edges.
: Place furnace in cavity.
ALL OPTIONS
exterior wall until door is ready to be installed.
DUCTING
(
FIG 4-7
Proper duct installation is critical to operation of furnace. When
installing ducts, use materials rated for continuous use at 200˚F.
HORIZONTAL INSTALLION
of one duct from both left and right side of casing.
2
WARNING
OR ON MODELS WITHOUT DOOR
combustion air from living area.
,
WALLS & SIMILAR COMBUSTIBLE BUILDING
-
SPECIFICATIONS
MINIMUM RETURN AIR
LOCATION
1-1/2˝ to 2-1/2˝
-
OVERSIZING CAN RESULT IN WATER LEAKAGE
A
(
)
17˝
FIG 1
(
)
7-1/2˝
FIG 2
(
)
19-1/2˝
FIG 1
without radius blocks a 45˚ angle
CAUTION

PERSONAL INJURY

have tabs protrude outside
DO NOT
)
-
USING SIDE DUCT OPTIONS
install
)
vent exhaust
DO NOT
NOT BE
. Failure to meet
B
C
7-1/2˝
19˝
17˝
19˝
10˝
*
- must have a minimum