We have an Atwood 8940-III-DCLP which has a built in relay on the board so I searched around and found that Dinosaur electronics sells a new 50 Fan plus pin model that substitutes well. I found that ASAP Parts, Inc. Had the best price at $107 including shipping UPS. Atwood 30132 AC motor. $160.38 Atwood 30134 Motor. $141.11 Atwood 30209. $52.41.

LITERATURE NUMBER MPD 31232

hydro flameTM

8900-III-LD Series Furnace

MODELS 8935, 8940

Technical Installation Manual

ENGLISH, FRANCAIS (et Canada)

THIS INSTRUCTION MANUAL IS FOR USE BY AN AUTHORIZED SERVICE TECHNICIAN TO INSTALL AN ATWOOD - hydro flameTM FURNACE.

INSTALLER: LEAVE THIS MANUAL WITH APPLIANCE. CONSUMER: RETAIN THESE MANUAL FOR FURTHER

REFERENCE.

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.

•Installation
Effective 3/08
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
VENT INSTALLATION - HORIZONTAL & VERTICAL ......................................	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
120 volt AC Models ..............................................................	3-4
Thermostat ..........................................................................	4
CONVERTIBLE GAS CONTROL ............................................................	4
Valve Conversion ....................................................................	4
Orifice Replacement ................................................................	4
SYSTEM CHECK TESTS ....................................................................	4
PROPANE GAS PRESSURE ..............................................................	4
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

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/NAT

Duct Static Pressure -

.10˝ W.C.*

Power Supply (VOLTS)

12-DC

120-AC

Watts - WI

Atwood 8940 Iii Dclp Troubleshooting