atwood furnace manual pdf

The Atwood Furnace is a high-efficiency heating system designed for RV and mobile applications, featuring automatic ignition, multiple heat settings, safety shut-off mechanisms, and durable construction. Below are key sections covering safety guidelines, technical specifications, installation procedures, operation instructions, maintenance requirements, and troubleshooting tips.

Features at a Glance

Key components: Burner assembly, blower motor, thermostat control, gas valve, heat exchanger, and venting system.

Feature	Description
Automatic Ignition	Electronic spark ignition for reliable startup
Multi-Speed Blower	Adjustable fan speeds for optimal heat distribution
Thermostat Control	Precise temperature regulation
Safety Shut-off	Automatic gas valve closure in case of malfunction
Heat Exchanger	Stainless steel construction for efficient heat transfer
Venting System	Direct vent or roof vent options available
Power Source	12V DC operation
Fuel Type	Propane/LP gas
BTU Output	Multiple capacity options (16,000-30,000 BTU)
Dimensions	Compact design for space-constrained installations

Installation

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

1. Select installation location: Choose area with adequate airflow and access to venting.
2. Mount furnace: Secure to floor or wall using provided brackets.
3. Connect gas line: Use approved flexible gas line with proper fittings.
4. Install venting: Attach vent pipe according to manufacturer specifications.
5. Wire electrical connections: Connect to 12V DC power source with proper fuse protection.
6. Test for leaks: Use leak detection solution on all gas connections.

WARNING! Installation must be performed by qualified technician. Ensure proper ventilation to prevent carbon monoxide buildup.

First-Time Setup

Complete initial startup procedure before regular use.

1. Verify all connections: Check gas, electrical, and venting connections.
2. Purge gas line: Open gas valve and purge air from line at furnace connection.
3. Set thermostat: Adjust to desired temperature setting.
4. Test ignition: Turn on furnace and verify proper ignition sequence.
5. Check airflow: Ensure proper air intake and exhaust flow.
6. Calibrate thermostat: Adjust if necessary for accurate temperature control.

CAUTION! Never bypass safety devices. Test carbon monoxide detector before operation.

Specifications

• Model Series: Atwood 8000/8500/9000 series
• BTU Ratings: 16,000, 20,000, 25,000, 30,000 BTU/hr
• Fuel Consumption: 0.16-0.30 gallons/hour (propane)
• Electrical Requirements: 12V DC, 3-8 amps
• Airflow: 100-180 CFM depending on model
• Dimensions: Varies by model (typically 20-25" L x 10-12" W x 10-12" H)
• Weight: 15-25 pounds
• Noise Level: 45-60 dB during operation
• Efficiency: 85-92% AFUE
• Warranty: 2-year limited warranty

Controls and Settings

Access control via thermostat or furnace control board. Main controls: Power switch, thermostat, blower speed selector.

Thermostat Settings: Temperature control, fan auto/on settings, system on/off.

Furnace Control Board: Ignition sequence control, safety lockout, error code display, blower speed adjustment. Maintenance: Access panel removal, filter replacement procedure, burner inspection.

Connecting to Power Source

12V DC power connection requirements and procedures.

1. Turn off all power sources before connecting.
2. Connect positive wire to furnace positive terminal.
3. Connect negative wire to furnace ground terminal.
4. Install appropriate fuse in power line (typically 15 amp).
5. Verify proper polarity before applying power.

Tip: Use marine-grade wire and connectors for corrosion resistance.

Operating the Furnace

Standard operating procedures for daily use.

1. Power on: Turn on furnace power switch.
2. Set thermostat: Adjust to desired temperature.
3. Start sequence: Furnace will initiate ignition sequence automatically.
4. Monitor operation: Listen for proper ignition and blower operation.
5. Adjust settings: Use thermostat to maintain comfortable temperature.
6. Shutdown: Turn thermostat to off position; furnace will complete cool-down cycle.

WARNING! Never operate without proper ventilation. Install and maintain carbon monoxide detectors.

Safety Features

Multiple safety systems: High limit switch, roll-out switch, pressure switch, flame sensor, thermal fuse.

Automatic Shut-off Conditions: Loss of flame, overheating, restricted airflow, gas pressure issues, electrical faults.

Care & Maintenance

Regular maintenance schedule for optimal performance and safety.

1. Monthly: Clean or replace air filter
2. Seasonal: Inspect burner assembly and heat exchanger
3. Annual: Professional inspection and cleaning
4. As needed: Check and clean venting system

CAUTION! Always disconnect power and gas supply before performing maintenance.

Regulatory Information

CSA/UL certified for RV use. Complies with ANSI Z21.44 standards for gas-fired furnaces. Manufactured to meet RVIA requirements. For technical support, contact Atwood Mobile Products at 1-800-888-3370 or visit www.atwoodmobile.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power issue, thermostat setting	Check 12V power, verify thermostat above current temperature
No heat output	Gas supply, ignition failure	Check propane tank, verify gas valve open, listen for spark
Blower runs but no heat	Ignition system failure	Check spark electrode, gas valve operation
Furnace cycles on/off frequently	Overheating, airflow restriction	Clean filter, check vents for obstruction
Error codes displayed	Various system faults	Refer to error code chart in service manual
Unusual odors	Dust buildup, combustion issues	Clean burner assembly, verify proper combustion

Reset Procedure: Turn power off for 30 seconds, then restart.

Service: 1-800-888-3370; www.atwoodmobile.com