Duo Therm Camper Furnace Manual

The Duo Therm Camper Furnace is a reliable heating system designed for recreational vehicles, featuring automatic temperature control, multiple heat settings, safety shut-off mechanisms, and easy installation. This furnace operates on propane/LP gas with 12V DC power, includes a built-in blower for efficient heat distribution, and offers various BTU outputs for different RV sizes. 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 Gas & Power 7. Operating the Furnace 8. Safety Features 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Thermostat control, burner assembly, blower motor, gas valve, safety shut-off, and exhaust vent.

Feature	Description
Thermostat Control	Automatic temperature regulation
Burner Assembly	Efficient propane combustion
Blower Motor	Distributes heated air throughout RV
Gas Valve	Controls propane flow to burner
Safety Shut-off	Automatic shut-off if flame fails
Exhaust Vent	Removes combustion gases safely
Power Switch	Turns furnace on/off
Heat Settings	Multiple heat levels (Low, Medium, High)
Pilot Light	Electronic ignition system
Air Intake	Brings in fresh air for combustion

Installation

Unpack and inspect all components. Ensure proper ventilation area.

Mount furnace: Secure to RV floor or wall using provided brackets.
Connect gas line: Use approved LP gas hose and fittings.
Wire electrical: Connect 12V DC power with proper fuse protection.
Install thermostat: Mount in desired location and connect wires.
Check venting: Ensure exhaust vent is clear and properly routed outside.

WARNING! Installation must be performed by qualified technician. Ensure all gas connections are leak-tested.

First-Time Setup

Power on furnace; follow startup procedure.

Check gas supply: Ensure propane tank is open and has sufficient fuel.
Set thermostat: Turn to desired temperature setting.
Ignition sequence: Furnace will automatically attempt ignition.
Test operation: Verify heat output and blower operation.
Adjust settings: Use thermostat for temperature control.

CAUTION! Ensure proper ventilation during initial operation. Check for gas odors immediately.

Specifications

BTU Output: 16,000 - 30,000 BTU (model dependent)
Fuel Type: Propane/LP Gas
Power Requirement: 12V DC
Ignition: Electronic spark ignition
Airflow: Built-in blower with adjustable speed
Thermostat: Digital or manual depending on model
Safety Features: Flame failure detection, overheat protection
Dimensions: Varies by model (typically 14" x 10" x 7")
Weight: 15-25 lbs depending on model

Controls and Settings

Access controls via thermostat or furnace control panel.

Thermostat: POWER, Temperature setting, Fan control, Mode selection.

Temperature: Set desired heat level. Fan: Auto or Continuous modes. Mode: Heat Only or Heat with Fan. Safety: Automatic shut-off if flame failure detected. Maintenance: LED indicators for system status.

Connecting Gas & Power

Gas connection: LP gas line with shut-off valve. Electrical: 12V DC with fuse.

Turn off all power and gas before connecting.
Connect gas line using approved fittings and sealant.
Wire 12V DC positive and negative to appropriate terminals.
Install proper fuse in power line (typically 15A).
Test all connections for leaks and proper operation.

Tip: Always use gas leak detector solution on all connections.

Operating the Furnace

Supports automatic temperature control and manual override.

Startup: Set thermostat above current room temperature.
Ignition: Listen for spark and burner ignition.
Operation: Blower will start once heat exchanger warms.
Adjustment: Change temperature setting as needed.
Shutdown: Set thermostat to lowest setting or turn off.
Fan delay: Blower continues after burner shuts off to dissipate heat.
Mode selection: Choose between automatic and manual fan operation.
Temperature limits: Built-in high-limit switch prevents overheating.

WARNING! Never operate without proper ventilation. Ensure exhaust vent is clear.

Safety Features

Flame Failure Detection: Automatically shuts off gas if flame extinguishes. Overheat Protection: High-limit switch turns off burner if temperatures exceed safe levels. Vent Safety: Pressure switch ensures proper venting before ignition.

Maintenance & Cleaning

Turn off power and gas before maintenance. Clean air intake and exhaust regularly.

CAUTION! Use only approved cleaning methods. Never use water or liquid cleaners on electrical components.

Regulatory Information

ANSI Z21.44: Certified for recreational vehicle use. CSA International: Complies with North American safety standards. Propane Equipment: Meets NFPA 58 requirements. For support, visit www.duotherm.com or contact 1-800-544-4888.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/gas supply	Check 12V power; verify gas valve open; check thermostat setting.
No heat output	Ignition failure	Listen for spark; check gas supply; clean burner assembly.
Blower doesn't run	Motor/thermostat	Check blower motor; verify thermostat fan setting; inspect wiring.
Furnace cycles on/off	Vent blockage	Clear exhaust vent; check air intake; clean filter.
Gas odor detected	Leak or incomplete combustion	Shut off immediately; check all connections; ensure proper ventilation.

Reset: Turn thermostat to lowest setting, wait 5 minutes, then restart.

Service: 1-800-544-4888; www.duotherm.com