atwood 8500-IV Series Furnace (8516, 8520, 8525, 8531, 8535) - Manuel (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
HORIZONTAL TOP AND SIDES ------1/2˝ REAR --1˝ BOTTOM --3/16˝
VERTICAL TOP AND SIDES ------1/2˝ REAR --1˝ BOTTOM ------0˝( SLIDE PLATE )
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.
NOTE : Clearances are specifically for plywood or similar building
materials surrounding furnace (i.e. furnace should NOT be located
under furniture or in closet space where clothing or other material
could be located.)
NOTE : Furnace efficiency rating is a thermal rating determined under
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 maintained.
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WARNING
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.
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CRITICAL INSTALLATION WARNINGS
• DO NOT install furnace on material that restricts return air, like carpet
or any soft material such as vinyl.
• DO NOT install furnace where clearance to combustibles cannot be
maintained.
• DO NOT modify furnace in any way.
• DO NOT alter furnace for a positive grounding system.
• DO NOT HI-POT furnace unless electronic ignition system (circuit
board) has been disconnected.
• DO NOT use battery charger to supply power to DC model furnace
even when testing.
• DO NOT 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
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 , REFER TO CURRENT STANDARDS OF :
•
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
NOTE : The direct high voltage spark ignition generates a radio frequency
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
(a shielded high voltage lead).
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WARNING
CARBON MONOXIDE POISONING
•
Properly seal door, adjust draft cap (
OR ON MODELS WITHOUT DOOR ) install
vent assembly) to prevent carbon monoxide from entering coach.
• DO NOT draw combustion air from living area. DO NOT vent exhaust
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 , WALLS & SIMILAR COMBUSTIBLE BUILDING
MATERIAL . The total unobstructed return air opening size(s) must NOT BE
LESS than specified in SPECIFICATIONS -
MINIMUM RETURN AIR
. Failure to meet
minimum return air requirements nullifies furnace warranty.
STANDARD FURNACE INSTALLATION
General Installation - LOCATION
• Install furnace through an exterior wall.
• DO NOT install furnace near tilt-out rooms, slide-outs, doors or
other projections that could obstruct furnace exhaust.
•
Locate furnace near midpoint of coach for single furnace applications.
• DO NOT install vent in areas where projections or door openings
come within 6˝ of vent tube opening.
• DO NOT install furnace in an area where wires, pipes, or other
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 1-1/2˝ to 2-1/2˝
DO NOT OVERSIZE HOLE - OVERSIZING CAN RESULT IN WATER LEAKAGE
EXTERIOR WALL CUTOUT A B C
HORIZONTAL ( FIG 1 ) 17˝ 7-1/2˝ 19˝
VERTICAL ( FIG 2 ) 7-1/2˝ 17˝ 19˝
RECESS BEZEL ( FIG 1 ) 19-1/2˝ 10˝ *
* RECESS BEZEL :To cut rounded corners: with radius blocks 2-1/8˝ radius
without radius blocks a 45˚ angle
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CAUTION
PERSONAL INJURY
• DO NOT allow furnace tabs to protrude through side wall cutout
opening during installation process until door is installed and tabs
are bent over. Tabs have sharp edges.
ALL OPTIONS : Place furnace in cavity. DO NOT have tabs protrude outside
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 - USING SIDE DUCT OPTIONS - must have a minimum
of one duct from both left and right side of casing.