Atwood 2334 Furnace Manual

The Atwood 2334 is a high-efficiency RV furnace designed for reliable heating in recreational vehicles. This furnace features electronic ignition, multiple heat settings, built-in safety controls, and operates on 12V DC power with propane fuel. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to RV Systems 7. Operation 8. Maintenance 9. Safety Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Electronic ignition system, thermostat control, combustion chamber, blower motor, propane gas valve, exhaust system.

Feature	Description
Electronic Ignition	Automatic spark ignition for reliable startup
Thermostat Control	Precise temperature regulation
Multiple Heat Settings	High/Low heat output options
Safety Shut-off	Automatic shutdown if flame is not detected
Blower Motor	Forced air distribution throughout RV
Propane Gas Valve	Controls fuel supply to burner
Exhaust System	Vents combustion gases safely outside
12V DC Operation	Compatible with standard RV electrical systems
Compact Design	Space-saving installation in RV compartments
LED Status Indicator	Shows operational status and error codes

Installation

Unpack and inspect all components. Ensure proper ventilation and clearances.

Mount furnace: Secure in designated RV compartment with proper clearances.
Connect propane supply: Use approved propane gas line with shut-off valve.
Electrical connection: Connect to 12V DC power source with proper fuse protection.
Venting: Install exhaust and intake vents according to manufacturer specifications.
Thermostat wiring: Connect to wall-mounted thermostat control.

WARNING! Propane is flammable; ensure all connections are leak-tested. Installation must comply with local codes.

First-Time Setup

Initial startup and system verification.

Check propane supply: Ensure adequate fuel and no leaks in system.
Power connection: Verify 12V DC power is available and properly fused.
Thermostat setting: Set thermostat to desired temperature.
Initial ignition: System will automatically attempt ignition when called for heat.
System check: Verify proper flame operation and air flow.

CAUTION! Never bypass safety controls. Ensure proper ventilation during operation.

Specifications

Model: Atwood 2334
Fuel Type: Propane (LPG)
Input BTU: 34,000 BTU/hour
Electrical: 12V DC operation
Air Flow: 120 CFM maximum
Dimensions: 17.5" x 10.25" x 9.5"
Weight: 18.5 lbs
Exhaust: 2" diameter vent pipe
Sound Level: 65 dB maximum
Operating Temp Range: -40°F to 140°F

Controls and Settings

Primary control via wall-mounted thermostat. Furnace includes internal control board with diagnostic capabilities.

Thermostat Controls: Temperature setting, Fan Auto/On, System On/Off.

Internal Settings: Blower delay timing, ignition retry attempts, flame sensor sensitivity, high limit temperature setting.

LED Status Codes: Solid green (normal operation), flashing green (ignition sequence), red flashes (error codes - refer to troubleshooting).

Connecting to RV Systems

Integration with RV propane, electrical, and ventilation systems.

Propane system: Connect to main propane tank with regulator and shut-off valve.
Electrical system: Connect to 12V DC house battery with 15A fuse protection.
Ventilation: Ensure proper exterior venting for combustion air and exhaust.
Ductwork: Connect to RV heating ducts for even heat distribution.

Tip: Always turn off propane and disconnect power before making connections.

Operation

Normal heating operation sequence.

Set thermostat: Adjust to desired temperature above current room temperature.
Ignition sequence: Blower runs for pre-purge, then ignition spark and gas valve opening.
Flame detection: Control board verifies flame establishment.
Heating operation: Main burner operates, blower distributes warm air.
Cycle off: When thermostat setting is reached, gas valve closes, blower continues for post-purge.

WARNING! Never operate furnace with blocked vents or inadequate ventilation.

Maintenance

Regular maintenance ensures optimal performance and safety.

Annual inspection: Check all components before heating season.
Clean combustion chamber: Remove any debris or soot buildup.
Check burner: Ensure clean and proper flame pattern.
Inspect venting: Clear any obstructions from exhaust and intake.
Test safety controls: Verify proper operation of all safety features.
Lubrication: Blower motor may require periodic lubrication.

CAUTION! Always disconnect power and propane before performing maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions.

Flame Rollout Switch: Shuts off gas if flame escapes combustion chamber
High Limit Switch: Prevents overheating by shutting off burner
Pressure Switch: Ensures proper venting before allowing ignition
Flame Sensor: Confirms burner ignition within safety time limit
Ignition Lockout: Prevents repeated ignition attempts if failure occurs

Regulatory Information

UL and CSA certified for RV use. Complies with ANSI Z21.44 standards for gas-fired recreational vehicle heaters. Manufactured to meet RVIA requirements. For technical support, contact Atwood Mobile Products at 1-800-888-3378 or visit www.atwoodmobile.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No ignition	No propane/power	Check propane supply and tank valve; verify 12V power
Blower runs but no heat	Ignition failure	Check spark electrode and gas valve operation
Short cycling	Dirty filter/overheating	Clean air filter; check for blocked vents
Error code flashes	System fault	Count red flashes and refer to error code chart
Poor heat output	Restricted airflow	Check ductwork and combustion air supply
Unusual odors	Dust buildup	Clean combustion chamber and heat exchanger
Loud operation	Blower issues	Check blower wheel and motor bearings

Reset: Turn thermostat off for 5 minutes, then restart.

Service: 1-800-888-3378; www.atwoodmobile.com