Dura Heat DFA135C 135K BTU Kerosene Forced Air Heater with Thermostat User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Dura Heat DFA135C 135,000 BTU Kerosene Forced Air Heater. Please read all instructions carefully before using the heater to ensure proper function and to prevent injury or damage.

The Dura Heat DFA135C is a commercial-grade forced air heater designed to provide fast, reliable heat in various environments such as construction sites, garages, and workshops. It features a 10-gallon fuel tank, a 500 CFM airflow, and can heat spaces up to 3,200 square feet. The heater is multi-fuel capable, operating on K-1 kerosene, #1 and #2 fuel oil, diesel, or jet fuel.

Figure 1: Dura Heat DFA135C 135K BTU Kerosene Forced Air Heater, main view.

2. Safety Information

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.

• Ventilation: Ensure adequate ventilation when operating this heater. This heater consumes oxygen. Do not use in unventilated areas.
• Fuel: Use only approved fuels: K-1 kerosene, #1 and #2 fuel oil, diesel, or jet fuel. Never use gasoline or other highly flammable liquids.
• Clearances: Maintain minimum clearances from combustible materials as specified in the product labeling.
• Supervision: Never leave the heater unattended while operating.
• Children and Pets: Keep children and pets away from the heater.
• Overheat Protection: The heater is equipped with overheat protection. If the heater overheats, it will automatically shut off.
• Flame-out Shut-off: The heater features flame-out shut-off protection for added safety.
• Electrical Safety: Ensure the power source matches the heater's requirements. Use a grounded extension cord if necessary.

3. Setup

3.1 Unpacking

Carefully remove the heater from its packaging. Inspect for any shipping damage. Retain packaging for future storage or transport.

3.2 Assembly (if required)

The Dura Heat DFA135C typically requires minimal assembly, primarily attaching the wheels and handles. Refer to the included assembly diagram for detailed steps.

• Attach the cold-weather flat-free wheels to the axle using the provided hardware.
• Secure the front and rear lift handles to the heater body.

Figure 2: Heater with attached wheels and handles, highlighting rugged steel construction and large capacity fuel tank.

3.3 Fueling the Heater

1. Ensure the heater is turned off and unplugged.
2. Remove the fuel cap.
3. Fill the 10-gallon fuel tank with clean K-1 kerosene, #1 or #2 fuel oil, diesel, or jet fuel. Do not overfill.
4. Securely replace the fuel cap.

Figure 3: Close-up view of the fuel tank area, showing the fuel cap and fuel gauge.

4. Operating Instructions

4.1 Starting the Heater

1. Place the heater on a level, stable surface, ensuring proper clearances from combustibles.
2. Plug the heater into a grounded electrical outlet.
3. Turn the thermostat control knob to the desired temperature setting.
4. Flip the power switch to the "ON" position. The heater will initiate a one-touch electronic start sequence.
5. The LED digital diagnostics display will show the current temperature and operational status.

Figure 4: Detailed view of the control panel, featuring the thermostat knob and LED digital diagnostics display.

4.2 Adjusting Temperature

Rotate the thermostat control knob to increase or decrease the desired temperature. The heater will cycle on and off to maintain the set temperature.

4.3 Shutting Down the Heater

To turn off the heater, flip the power switch to the "OFF" position. Allow the fan to run for a few minutes to cool down the combustion chamber before unplugging.

5. Maintenance

Regular maintenance ensures optimal performance and longevity of your heater.

• Daily: Check for any visible damage or leaks. Ensure the area around the heater is clear of obstructions.
• Weekly: Clean the exterior of the heater with a damp cloth. Do not use abrasive cleaners.
• Monthly/Seasonally: Inspect the fuel filter and replace if clogged. Clean the fan blades and motor housing. Check electrical connections for tightness.
• Storage: When storing the heater for extended periods, drain all fuel from the tank. Store in a dry, clean area.

6. Troubleshooting

7. Specifications

• Model: DFA135C
• Brand: Dura Heat
• Heat Output: 135,000 BTU
• Heating Coverage: Up to 3,200 sq ft
• Fuel Type: K-1 Kerosene, #1 & #2 Fuel Oil, Diesel, Jet Fuel
• Fuel Tank Capacity: 10 Gallons
• Runtime: Approximately 10 hours (at 1 gallon per hour fuel consumption)
• Airflow: 500 CFM
• Power Source: Electric (1500 watts)
• Special Features: Built-in Thermostat, LED Digital Diagnostics, Flame-out Shut-off Protection, Overheat Protection, "Run Time" Fuel Gauge, Cold-Weather Flat-Free Wheels, Front and Rear Lift Handles
• Dimensions: 19"D x 36"W x 23"H
• Item Weight: 59.5 pounds
• Certifications: CSA Certified, ETL Listed

8. Warranty

This Dura Heat heater is covered by a manufacturer's warranty against defects. For specific terms and conditions, please refer to the warranty card included with your product or contact Dura Heat customer service. The warranty typically covers manufacturer defects only.

9. Support

For technical assistance, replacement parts, or warranty claims, please contact Dura Heat customer support. Have your model number (DFA135C) and purchase date available when contacting support.

You can often find additional resources, FAQs, and contact information on the official Dura Heat website or through your product retailer.