Atwood 8940 Iii Dclp Troubleshooting

RV Make: Damon, RV Model: 4096, RV Year: 2004, Brand: Atwood furnace, Model Number: 8940-iii-dclp. November 18th, 2020. I have just perched a 2004 Damon 4096 motorhome. It has two top air and heat unites and one Atwood furnace. The top units are remote control. There is no thermostat for the furnace. How dose it work with the top units remote. Atwood 8940-III-dclp: I am getting the 3 flashes on the circuit board indicating an ignition lockout fault. Originally the blower would start, the furnace would ignite temporarily, then shut off after a few seconds, repeat this 3 times and then the blower would turn off.

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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 THESE MANUAL FOR FURTHER
REFERENCE

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

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

..................................

SAFETY INFORMATION

..................................................................

1-2

FURNACE INSTALLATION

..................................................................

VENT INSTALLATION - HORIZONTAL & VERTICAL

......................................

WALL CUTOUT

HORIZONTAL & VERTICAL

..............................................

DUCTING

HORIZONTAL & VERTICAL

......................................................

Flexible Ducting

......................................................................

Hard Ducting

........................................................................

OPTIONAL INSTALLATION

BOTTOM DISCHARGE KIT

..................................

GAS CONNECTION

........................................................................

ELECTRICAL CONNECTIONS

..........................................................

3-4

Conductor Sizing Table

............................................................

12 volt DC Models

..................................................................

120 volt AC Models

..............................................................

Thermostat

..........................................................................

CONVERTIBLE GAS CONTROL

............................................................

Valve Conversion

....................................................................

Orifice Replacement

................................................................

SYSTEM CHECK TESTS

....................................................................

PROPANE GAS PRESSURE

..............................................................

STATIC PRESSURE

........................................................................

DC WIRING DIAGRAMS

............................................................

ILLUSTRATIONS

............................................................................

REPLACEMENT PARTS LIST

DRAWING

..............................................

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/NAT

Duct Static Pressure -

.10˝ W.C.*

Power Supply (

VOLTS

)

12-DC

120-AC

Watts -

WITH OUT DOOR

151

360

Amperage

12.6

MINIMUM RETURN AIR

80 in

DIMENSIONS

WEIGHT

ALL MODELS WITH DOOR

WIDTH

HEIGHT

DEPTH

Casing

16-1/2˝

9-1/8˝

23-1/2˝ - 26˝

FURNACE

38 lbs.

Vent

5˝

5-3/8˝

SHIPPING

45 lbs.

ENGLISH, FRANCAIS

(et Canada)

•Installation

Effective 3/08

LITERATURE NUMBER

MPD 31232

hydro flame

8900-III-LD 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.

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Table of contents

Atwood 8940-iii-dclp Manual

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Atwood / Hydro Flame Furnace Model 8940-AC-III Tune-Up Kit comes in two variations. The first (Kit #1) has a single sense electrode (one wire that goes to the electrode), the second (Kit #2) has a dual sense electrode (two wires that go to the electrode). Please verify which kit is applicable to your furnace prior to ordering

Tune-Up Kit #1 (Single Sense Electrode):

Item #36 Sail Switch 36680 (31377)

Tune-Up Kit #2 (Dual Sense Electrode):

Item #36 Sail Switch 36680 (31377)

Click The Down Arrow To View Complete Exploded Parts View Links & Available Downloads

Item# 2 Thermostat, Brown 38452 NLA

Item# 2 Thermostat, White 38453

Item# 3 Duct Cover 31361

Item# 4 Duct Adapter, 4 Inch 31474

Item# 6 Orifice 31077

Item# 7 Combustion Air Wheel 33128

Item# 9 Motor Gasket 37713

Item# 10 Gas Valve 31159, AC Models Only, Before S/N 0657716

Item# 10 Gas Valve 38603, AC Models Only, After S/N 0657715

Item# 19 DSI Board Bracket 34541

Item# 20 Slide Plate 37442 After S/N 0657715

Item# 21 Circuit Breaker 35791, 5 Amp

Item# 22 Screw Latch 33847

Item# 23 DSI Module Board (24VAC Ignition Board) 37515

*Not Shown* Wiring Harness Kit 30232

Atwood 8940-iii-dclp Troubleshooting

Item# 27 Blower Housing

Item# 34 Motor Kit, AC Voltage 30132 (Replaces P# 35122)

Item# 36 Sail Switch 36680

Atwood 8940-iii-dclp Parts Diagram

Atwood 8940-iii-dclp Parts

Item# 37 Draft Cap (Exhaust) 38141

Item# 42 Capacitor 34039

Atwood 8940 Iii Dclp Troubleshooting

Item# 45 Exhaust Wall Gasket 37956

Item# 50 Blower Wheel 34099

Item# 51 Electrode (Single Sense) 34570

*Not Shown* Single Sense Electrode Gasket 37100

Item# 51 Electrode (Dual Sense) 36997

Atwood 8940 Iii Dclp Troubleshooting

*Not Shown* Dual Sense Electrode Gasket 32172

Item# 52 Limit Switch 37021

Item# 53 Burner Assembly 35491

Atwood Model 8940-iii-dclp Parts

Item# 55 Blower Assembly 34014

Item# 58 Transformer 35121

Item# 60 Igniter Lead 34571

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