Atwood Mobile Products HYDRO FLAME 2540 User Manual
LITERATURE NUMBER
hydro flame
2 Stage Series Furnace
MPD 31230
TM
8900-III-LD
9
MODEL 2540
Technical Installation Manual
Patent No US 6,464,000. 6,719,207. Other Patents Pending
ENGLISH, FRANCAIS (et Canada) •Installation
Effective 1/08
THIS INSTRUCTION MANUAL IS FOR USE BY AN AUTHORIZED SERVICE
TECHNICIAN TO INSTALL AN ATWOOD
INSTALLER
: LEAVE THIS MANUAL WITH APPLIANCE.
- hydro flame
TM
FURNACE.
CONSUMER: RETAIN THIS MANUAL FOR FURTHER REF-
ERENCE.
This furnace design has been certified for installation in recreation vehicles as a MSP Category III furnace. Follow this
installation instruction to insure safe operation of the furnace.
Failure to install furnace according to this installation instruction nullifies the furnace warranty.
SAFETY ALERT SYMBOLS
Safety Symbols alerting you to potential personal safety hazards.
Obey all safety messages following these symbols.
WARNING CAUTION
avoid possible avoid possible
injury or death injury and/or property damage
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of
life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Evacuate all persons from vehicle.
• Shut off gas supply at gas container or source.
• Do not touch any electrical switch, or use any
phone or radio in vehicle.
• Do not start vehicle’s engine or electric generator.
• Contact nearest gas supplier or qualified Service
Technician for repairs.
• If you cannot reach a gas supplier or qualified
Service Technician, contact the nearest fire
department.
• Do not turn on gas supply until gas leak(s) has
been repaired.
— Installation and service must be performed by a
qualified Service Technician, Service Center or
gas supplier.
FURNACE SPECIFICATIONS ..............................................................1
DIMENSIONS ..................................................................1
WEIGHT ........................................................................1
MINIMUM CLEARANCE TO FLOORBOARDS, WALLS,
& SIMILAR COMBUSTIBLE BUILDING MATERIALS ..............................1-2
SAFETY INFORMATION..................................................................1-2
FURNACE INSTALLATION ..................................................................2
WALL CUTOUT OPTIONS HORIZONTAL & VERTICAL ......................................2
VENT INSTALLATION (MODELS WITHOUT DOOR) HORIZONTAL & VERTICAL................2
DUCTING HORIZONTAL & VERTICAL ....................................................2-3
Required Minimum Discharge Chart ............................................3
Flexible Ducting......................................................................3
Floor Ducting ........................................................................3
OPTIONAL INSTALLATION - BOTTOM DISCHARGE KIT..................................3
PROPANE GAS CONNECTION ............................................................3
ELECTRICAL CONNECTIONS..............................................................
Conductor Sizing Table
Thermostat Installation ..........................................................3-4
SYSTEM CHECK TESTS ....................................................................4
DIAGNOSTIC CHART ......................................................................4
PROPANE GAS PRESSURE ..............................................................4
STATIC PRESSURE ........................................................................4
WIRING DIAGRAM ..........................................................................4
ILLUSTRATIONS ............................................................................5
REPLACEMENT PARTS LIST & DRAWING ..............................................6
SPECIFICATIONS (W.C. = Water Column)
MODEL 2540 LOW HIGH
BTU Input 25,000 40,000
Duct Static Pressure .10˝ W.C. .10˝ W.C.
12 Volt Amperage (AMPS) 7.2 16.8
Watts 86 202
Power Supply (VOLT DC)1212
Recommended Return Air 80 in
MINIMUM RETURN AIR 80 in
DIMENSIONS
ALL MODEL WIDTH HEIGHT DEPTH
Casing 16-1/2˝ 9-1/8˝ 23 1/2˝ - 26˝ FURNACE 39 lbs
Door 19-1/4˝ 9-1/4˝ 1/4˝
Recess Bezel 20-9/16˝ 11-1/2˝
VENT 5˝ 5-3/8˝
FLOORBOARDS, WALLS & SIMILAR COMBUSTIBLE BUILDING MATERIALS
MUST BE PROVIDED THE FULL LENGTH AND WIDTH OF UNIT
HORIZONTAL TOP
VERTICAL TOP
MINIMUM CLEARANCE TO
----1/2˝ BOTTOM 3/16˝ SIDES ----1˝ REAR --1/2˝
----1/2˝ BOTTOM ----0˝ SIDES ----1˝ REAR --1/2˝
INDEX
............................................................3
2
2
2
80 in
2
80 in
WEIGHT
SHIPPING 46 lbs
3
1
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 materi-
als 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.)
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.
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 appliances.
CRITICAL INSTALLATION WARNINGS
• DO NOT install furnace on material that restricts return air, such as
carpeting or any soft material i.e. vinyl.
• DO NOT install furnace where clearance to combustibles cannot be
maintained.
• DO NOT modify furnace in any way.
• 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 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 A119.5
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 KIT
MPD 37773 (a shielded high voltage lead).
CARBON MONOXIDE POISONING
WARNING
Properly seal 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
MINIMUM CLEARANCE TO FLOORBOARDS, WALLS & SIMILAR COMBUSTIBLE BUILDING
to
. The total unobstructed return air opening size(s) must NOT BE
MATERIAL
LESS than specified in SPECIFICATIONS - MINIMUM RETURN AIR. Failure to meet
minimum return air requirements nullifies furnace warranty.
STANDARD FURNACE INSTALLATION
General Installation -
• 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
are 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 carpeting, or soft material such as vinyl.
• DO NOT directly install furnace on carpeting or soft material, install
furnace 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.
• 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
RECOMMENDED WALL THICKNESS
DO NOT OVERSIZE HOLE - OVERSIZING CAN RESULT IN WATER LEAKAGE
EXTERIOR WALL CUTOUT (FIG 1 -1A) ABC
HORIZONTAL & VERTICAL 3-1/8˝ 2-3/8˝ 3-1/2˝ dia. hole
VENT INSTALLATION HORIZONTAL & VERTICAL INSTALLATION (FIG 1-1A)
1. Locate vent hole cutout as called out in
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 (
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
DUCTS 9˝ IN LENGTH OR MORE 200˚F.
4˝ DUCTS -LESS THAN 9˝ IN LENGTH 250˚F.
METAL BOOTS LESS THAN
2
LOCATION
0˝ to 2-1/2˝
9˝ IN LENGTH
FIG 1-1A.
FIG 1-1A). Slip into combustion air
CONTINUOUS USE MATERIALS RATING
250˚F.
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