Atwood Hydra Flame Furnace Owners Manual

The Atwood Hydra Flame Furnace is a high-efficiency heating system designed for RV and mobile applications, featuring electronic ignition, multiple heat settings, built-in safety controls, and durable construction. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Power and Fuel 7. Operating the Furnace 8. Safety Features 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Electronic ignition system, thermostat control, air intake/exhaust vents, gas valve, blower motor, heat exchanger.

Feature	Description
Electronic Ignition	Pilotless ignition for reliable startup
Thermostat Control	Precise temperature regulation
Multiple Heat Settings	Adjustable BTU output for efficiency
Safety Shut-off	Automatic gas shut-off if flame fails
Blower Motor	Forced air distribution
Heat Exchanger	Efficient heat transfer
Air Intake/Exhaust	Separate venting system
Gas Valve	Controls fuel supply
Control Board	Electronic operation management
Limit Switch	Prevents overheating

Installation

Unpack and inspect contents. Ensure proper location and ventilation.

Choose installation location: Well-ventilated area, away from combustible materials.
Mount furnace: Secure to floor or wall using provided brackets.
Connect venting: Install intake and exhaust pipes according to specifications.
Connect gas line: Use approved gas piping and fittings.
Connect electrical: 12V DC power supply with proper fuse protection.
Test operation: Verify proper ignition and airflow.

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

First-Time Setup

Power on furnace; follow startup procedure.

Check gas connection: Ensure gas valve is open and lines are purged.
Set thermostat: Adjust to desired temperature setting.
Test ignition: Turn on furnace and verify proper flame ignition.
Adjust airflow: Ensure proper air intake and exhaust flow.
Calibrate thermostat: Set temperature differential as needed.

CAUTION! Always check for gas leaks before operation. Use soap solution on connections.

Specifications

Heating Capacity: 25,000-30,000 BTU/hr
Fuel Type: Propane/Natural Gas
Ignition: Electronic spark ignition
Power Requirements: 12V DC
Airflow: 100-150 CFM
Efficiency: 80%+ AFUE
Venting: Direct vent or power vent options
Dimensions: Standard RV furnace size
Weight: 25-35 lbs
Operating Temp Range: -40°F to 120°F

Controls and Settings

Access controls via thermostat or furnace control panel.

Thermostat: Temperature setting, fan control, system on/off.

Furnace Controls: Power switch, reset button, diagnostic lights.

Temperature Settings: Adjustable from 50°F to 90°F. Fan Control: Auto or continuous operation. Heat Settings: Multiple BTU output levels. Safety Settings: High limit control, flame sensor, pressure switch.

Connecting to Power and Fuel

Gas connection: Use approved gas line and fittings. Electrical: 12V DC with proper grounding.

Turn off all power and gas before connecting.
Connect gas line: Use thread sealant approved for gas.
Connect electrical: Proper polarity and fuse protection.
Test connections: Check for leaks and proper voltage.

Tip: Always use gas leak detector or soap solution to test connections.

Operating the Furnace

Supports automatic and manual operation modes.

Startup: Set thermostat above room temperature.
Ignition sequence: Blower starts, then ignition, then gas valve opens.
Normal operation: Furnace cycles on/off based on thermostat setting.
Shutdown: Set thermostat below room temperature or turn off power.
Fan operation: Continues after heat cycle to cool heat exchanger.

WARNING! Never block air intake or exhaust vents. Ensure proper ventilation at all times.

Safety Features

Flame Rollout Switch: Shuts off gas if flame escapes burner area. Limit Switch: Prevents overheating. Pressure Switch: Ensures proper venting. Flame Sensor: Confirms burner ignition.

Maintenance & Cleaning

Turn off power and gas before maintenance. Clean air filters monthly. Inspect burner annually.

CAUTION! Never operate with blocked vents or dirty filters. Regular maintenance required for safe operation.

Regulatory Information

ANSI Z21.47: Certified for RV use. CSA International: Safety certified. EPA: Compliant with emissions standards. For support, visit www.atwoodmobile.com or contact 1-800-555-HEAT.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No ignition	Power/gas supply	Check 12V power; verify gas valve open; check spark electrode.
Furnace short cycles	Dirty filter/overheating	Clean or replace air filter; check venting.
No heat output	Gas valve/ignition	Verify gas supply; check ignition system; reset furnace.
Blower doesn't start	Motor/control board	Check blower motor; verify control board operation.
Error codes flashing	System fault	Refer to diagnostic chart in manual; reset if needed.

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

Service: 1-800-555-HEAT; www.atwoodmobile.com