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THIS INSTRUCTION MANUAL IS FOR USE BY AN AUTHORIZED SERVICE

TECHNICIAN TO INSTALL AN ATWOOD

- hydro flame

FURNACE.

INSTALLER

: LEAVE THIS MANUAL WITH APPLIANCE.

CONSUMER: RETAIN THIS MANUAL FOR FURTHER REF-

ERENCE.

This furnace design has been certified for installation in recre-

ation vehicles as a MSP Category III furnace. Follow this installa-

tion 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

INDEX

FURNACE SPECIFICATIONS ..............................................................1

DIMENSIONS ..................................................................1

WEIGHT ........................................................................1

MINIMUM CLEARANCE TO FLOORBOARDS, WALLS,

& SIMILAR COMBUSTIBLE BUILDING MATERIALS..................................2

SAFETY INFORMATION..................................................................1-2

FURNACE INSTALLATION ..................................................................2

WALL CUTOUT HORIZONTAL & VERTICAL ..............................................2-3

DUCTING HORIZONTAL & VERTICAL........................................................3

Flexible Ducting......................................................................3

Hard Ducting ........................................................................3

OPTIONAL INSTALLATION - BOTTOM DISCHARGE KIT..................................3

GAS CONNECTION ........................................................................3

ELECTRICAL CONNECTIONS ..........................................................3-4

Conductor Sizing Table ............................................................3

12 volt DC Models................................................................3-4

120 volt AC Models ................................................................4

Thermostat ..........................................................................4

DOOR INSTALLATION HORIZONTAL & VERTICAL ..........................................4

RAIN SHIELD INSTALLATION ............................................................4

DRAFT CAP ASSEMBLY ..................................................................4

CONVERTIBLE GAS CONTROL ........................................................4-5

Valve Conversion ....................................................................4

Orifice Replacement ................................................................5

SYSTEM CHECK TESTS ....................................................................5

PROPANE GAS PRESSURE ..............................................................5

STATIC PRESSURE ........................................................................5

AC & DC WIRING DIAGRAMS ............................................................5

ILLUSTRATIONS ............................................................................6

REPLACEMENT PARTS LIST & DRAWING ..............................................7

SPECIFICATIONS *(W.C. = Water Column)

MODEL # 8935 8940 8935 8940

DCLP-III DCLP-III ACLC-III ACLC-III

BTU Input 35,000 40,000 35,000 40,000

Output BTU/HR 27,300 31,200 27,300 31,200

Type Gas LP LP LP/NAT LP/NAT

Duct Static Pressure - .10˝ W.C.* .10˝ W.C. .10˝ W.C. .10˝ W.C.

Power Supply (

VOLTS) 12-DC 12-DC 120-AC 120-AC

Watts 132 132 360 360

Amperage 11 11 3 3

MINIMUM RETURN AIR 80 in

80 in

DIMENSIONS

WEIGHT

ALL MODELS WITH DOOR WIDTH HEIGHT DEPTH

Casing 16-1/2˝ 9-1/8˝ 23-1/2˝ FURNACE 38 lbs.

Door 19-1/4˝ 9-1/4˝ 1/4˝ SHIPPING 45 lbs.

Recess Bezel 20-9/16˝ 11-1/2˝

ENGLISH, FRANCAIS (et Canada) •Installation

Effective 11/27/06

LITERATURE NUMBER

MPD 32046

hydro flame

8900-III Series Furnace

MODELS 8935, 8940

Technical Installation Manual

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.

Summary of content (7 pages)

PAGE 1
LITERATURE NUMBER MPD 32046 hydro flame ® 8900-III Series Furnace MODELS 8935, 8940 Technical Installation Manual ENGLISH, FRANCAIS •Installation (et Canada) Effective 11/27/06 THIS INSTRUCTION MANUAL IS FOR USE BY AN AUTHORIZED SERVICE TECHNICIAN TO INSTALL AN ATWOOD - hydro flame TM INDEX FURNACE. FURNACE SPECIFICATIONS ..............................................................1 ..................................................................1 ...........................................
PAGE 2
MINIMUM CLEARANCE TO USA AND CANADA FLOORBOARDS, WALLS & SIMILAR COMBUSTIBLE BUILDING MATERIALS* MUST BE PROVIDED THE FULL LENGTH AND WIDTH OF UNIT HORIZONTAL TOP VERTICAL TOP ----1/2˝ ----1/2˝ BOTTOM BOTTOM --3/16˝ ------0˝ SIDES ----1˝ REAR ----1/2˝ SIDES ----1˝ REAR ----1/2˝ 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.
PAGE 3
VERTICAL The only ducting option, when using vertical installation, are the top two ducts and two ducts off the back of the casing. This is the only configuration allowed with vertical installation (FIG 3A).  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. GAS CONNECTION (FIG. 1) 1. Connect gas line to brass fitting on right side of furnace.
PAGE 4
120 VOLT AC MODELS Route 120 volt AC and thermostat leads to wires located on the left side of control box using a minimum of 18 GA wire. The furnace must be installed so electrical components are protected from water. To make electrical connections see WIRING DIAGRAM FIG 12 1. Route wiring to left side of furnace. 2. Remove junction box cover. 3. Connect 120 white wire to furnace 120 white wire. 4. Connect 120 black wire to furnace 120 black wire. 5. Connect ground wire to furnace green ground wire.
PAGE 5
3. A. When set for LP and NAT is required: Rotate plug and replace into valve tower. NAT SHOULD NOW BE VISIBLE FIG 5 B. When set for NAT and LP is required: Rotate plug and replace into valve tower. LP SHOULD NOW BE VISIBLE FIG 5 4. Check rod for proper positioning while tightening plug into tower. The plug, which has been factory calibrated for this valve only, should be reinstalled finger tight. DO NOT USE PLUG ON ANY OTHER VALVE.
PAGE 6
A 1-A A Access to Static Pressure Tap 5 (Accès à l’orifice Statique) E C A F G D 10 1-1/4" 2 1 A B 1-1/4" B 9 1 D B C 8 8 8 8 7 7 5 6 OR 6 OR OR AVANT DU VEHICULE MUST USE MUST USE 3 3-A MU U ST MU F E 4 D A C B 6 SE U ST SE
PAGE 7
hydro flame TM 8900-III Series Furnace Models 8935, 8940 35 33 31 23 4 13 34 29 17 3 25 36 37 2 18 14 20 7 24 11 43 40 10 6 44 32 30 45 28 8 9 16 5 42 38 19 39 41 DRAWING 1 2 3 4 5 6 7 8 9 10 11 13 14 16 17 18 19 20 23 24 25 28 29 30 31 32 33 34 35 # DESCRIPTION OF PARTS Relay Thermostat - specify color Duct Cover Plate Duct Adapter Orifice — SPECIFY GAS & BTU Combustion Wheel Motor Gasket Valve DC Valve Repl Coil DC Gas Inlet Plug Slide Plate Electronic Ignition Board DC Ki