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Standard Furnace Installation; General Installation-Location; Wall Cutout Options; Vent Installation - Atwood HYDRO FLAME 2540 User Manual

Atwood mobile products furnace user manual
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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 materi-
NOTE
als surrounding the furnace (i.e. furnace should
be located
NOT
under furniture or in a closet space where clothing or other mate-
rial 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.
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.
CRITICAL INSTALLATION WARNINGS
install furnace on material that restricts return air, such as
DO NOT
carpeting or any soft material i.e. vinyl.
install furnace where clearance to combustibles cannot be
DO NOT
maintained.
modify furnace in any way.
DO NOT
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.
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
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 A119.5
: 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 KIT
MPD 37773 (a shielded high voltage lead).
WARNING
CARBON MONOXIDE POISONING
Properly seal vent assembly to prevent carbon monoxide from
entering coach.
draw
combustion air from living area.
vent exhaust
DO NOT
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
WALLS & SIMILAR COMBUSTIBLE BUILDING
. The total unobstructed return air opening size(s) must
MATERIAL
NOT BE
than specified in
-
. Failure to meet
LESS
SPECIFICATIONS
MINIMUM RETURN AIR
minimum return air requirements nullifies furnace warranty.

STANDARD FURNACE INSTALLATION

General Installation -
LOCATION
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
are 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 carpeting, or soft material such as vinyl.
directly install furnace on carpeting or soft material, install
DO NOT
furnace on cleats, or on a wood or metal panel extending the full
width and depth of furnace plus minimum clearances to combustibles.
use petroleum or citrus type cleaners on plastic parts, as
DO NOT
damage may occur.
• The furnace must always be installed level (front to back, side to
side) to prevent water intrusion into the interior.

WALL CUTOUT OPTIONS

HORIZONTAL & VERTICAL
0˝ to 2-1/2˝
RECOMMENDED WALL THICKNESS
-
DO NOT OVERSIZE HOLE
OVERSIZING CAN RESULT IN WATER LEAKAGE
(
)
A
B
C
EXTERIOR WALL CUTOUT
FIG 1 -1A
3-1/8˝
2-3/8˝ 3-1/2˝ dia. hole
HORIZONTAL & VERTICAL

VENT INSTALLATION

(
)
HORIZONTAL & VERTICAL INSTALLATION
FIG 1-1A
1. Locate vent hole cutout as called out in
1-1A.
FIG
2. Drill 3-1/2˝ diameter hole through side wall of coach.
3. Remove vent and vent ring from furnace.
4. Insert furnace from backside of wall. Line up hole in wall with hole
for vent to furnace.
5. Apply sealant to back of vent ring and vent cap base.
6. Install vent assembly with HOT at top for horizontal and on right
side for vertical installation (
1-1A). Slip into combustion air
FIG
intake tube. Secure to wall with four (4) screws.
7. Vent assembly must have a minimum of 1-1/4˝ overlap on exhaust
and 1/2˝ minimum on combustion air.
8. Horizontal units - secure to floor with two (2) screws through legs
on back of casing. Vertical units use vertical mounting brackets and
self-tapping screws to hold furnace to floor (tabs on control box can
be used also to secure furnace).
DUCTING
(
)
HORIZONTAL & VERTICAL
FIG 2-3A
HORIZONTAL
PROPER DUCT INSTALLATION IS CRITICAL TO THE OPERATION OF THIS FURNACE
CONTINUOUS USE MATERIALS RATING
200˚F.
DUCTS
IN LENGTH OR MORE
-
250˚F.
DUCTS
LESS THAN
IN LENGTH
250˚F.
METAL BOOTS LESS THAN
IN LENGTH
Page 2

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