1. Introduction
The Orion Motor Tech 5kW Diesel Air Heater (Model DAH-5KW0-AB) is designed as an independent thermal accessory for warming the interiors of various vehicles such as sedans, SUVs, RVs, trucks, campers, and boats. This standalone heating appliance operates separately from the vehicle's engine and drive system, ensuring focused warmth without mechanical wear. It is engineered for reliable performance across a wide range of temperatures and altitudes, providing a comfortable environment in challenging conditions.
2. Safety Information
Your safety is paramount. Please read and understand all safety instructions before operating the heater.
- Flame-Retardant Casing: The heater features a flame-retardant casing designed to stop sparks within 2 seconds, safeguarding internal components.
- Automatic Shutoff: The unit will automatically shut off if temperatures exceed 518°F (270°C) to prevent overheating.
- CO Alarm: An included Carbon Monoxide (CO) alarm monitors air quality in real time, providing an extra layer of protection. Ensure the CO alarm is functional and properly placed.
- Ventilation: Always ensure adequate ventilation when operating the heater. Exhaust fumes must be directed outside and away from any air intake.
- Fuel Type: Use only diesel fuel. Do not use gasoline or other flammable liquids.
- Placement: Place the heater on a stable, non-flammable surface. Ensure sufficient clearance around the unit for proper airflow and to prevent fire hazards.
- Not an Engine Part: This is a standalone heating appliance and is not designed to be an engine part.

Image: The Orion Motor Tech 5kW Diesel Air Heater highlighting its flame-retardant housing, overheat protection, and real-time CO alarm for enhanced safety.
3. Package Contents
Please check the package contents against the list below:
- 1x Diesel Air Heater Unit
- 1x Exhaust Pipe (flexible metal)
- 1x Muffler
- 1x Air Intake Pipe with Filter
- 1x Hot Air Outlet Duct
- 1x Remote Control
- 1x Carbon Monoxide (CO) Alarm
- 1x Power Adapter (for AC 110V)
- 1x Battery Connection Cables (for DC 12V/24V)
- 1x Fuel Tank Cap
- Various Hose Clamps, Screws, and Mounting Accessories
- User Manual
4. Setup
4.1 Fueling the Heater
- Ensure the heater is turned off and cool before fueling.
- Unscrew the fuel tank cap located on the top of the unit.
- Use the provided funnel to carefully pour diesel fuel into the 1.3-gallon (5L) tank.
- Monitor the clear fuel gauge on the side of the unit to avoid overfilling.
- Securely replace the fuel tank cap.

Image: The Orion Motor Tech 5kW Diesel Air Heater showcasing its 1.3-gallon fuel tank and clear fuel gauge for easy monitoring.
4.2 Power Connection
The heater supports multiple power sources:
- DC 12V/24V: Connect the red and black battery cables to your vehicle's 12V or 24V battery terminals (red to positive, black to negative).
- AC 110V: Use the provided power adapter to connect the heater to a standard 110V AC household outlet.

Image: The heater demonstrating connectivity to both 12V/24V DC power for outdoor use (e.g., camping) and 110V AC household power for indoor use.
4.3 Exhaust and Intake Setup
- Connect the flexible metal exhaust pipe to the exhaust port on the side of the heater. Secure it with a clamp.
- Attach the muffler to the end of the exhaust pipe. Ensure the small drain hole on the muffler faces downwards to allow condensation to escape.
- Direct the exhaust fumes safely outside and away from any air intakes or living spaces.
- Connect the air intake pipe with the filter to the intake port on the heater. Secure it with a clamp.
- Ensure the air intake is clear of obstructions and draws in clean air.

Image: The Orion Motor Tech 5kW Diesel Air Heater with its exhaust pipe, muffler, and air intake pipe connected, ready for operation.
4.4 Heater Placement
- Place the heater on a stable, level, and non-flammable surface.
- Maintain adequate clearance around the heater (at least 12 inches on all sides) to ensure proper airflow and prevent fire hazards.
- Ensure the hot air outlet duct is directed towards the area to be heated and is not obstructed.
5. Operating Instructions
5.1 Starting the Heater
- Ensure the heater is properly fueled and connected to a power source.
- Press the power button on the control panel or the remote control to turn on the unit.
- The LCD display will illuminate, showing current settings and room temperature.

Image: The heater's smart display showing real-time status and temperature monitoring, alongside the remote control and smartphone app for convenient operation.
5.2 Adjusting Temperature and Settings
- Control Panel: Use the control knob on the LCD display to adjust the desired temperature between 46°F (8°C) and 97°F (36°C). Press the settings button to access other options like timed settings or pre-heat mode.
- Remote Control: Use the power buttons (on/off) and temperature adjustment buttons (+/-) on the long-range remote control to operate the heater from a distance of up to 197 ft.
- Smartphone App: Download the dedicated smartphone app (via Bluetooth) to control the heater. Adjust the temperature, set timed operations, and monitor the unit from up to 164 ft away.
5.3 Performance Features
- Rapid Warm-Up: The 5kW output provides 30% faster heating, capable of warming 161.5 sq. ft. in just 10 minutes.
- Wide Operating Temperature: Operates reliably from -49°F (-45°C) to 122°F (50°C).
- Altitude Adjustment: Automatically adjusts for altitudes up to 18,045 ft (5500m).
- Low Noise Operation: Designed for quiet operation, producing less than 45dB of sound.

Image: Internal view of the heater highlighting its 5kW power, operating temperature range, adjustable temperature, motor speed, fuel efficiency, and fuel consumption.
5.4 Shutting Down the Heater
Press and hold the power button on the control panel or remote control until the unit powers off. Allow the fan to run for a few minutes to cool down the internal components before disconnecting power or moving the unit.
6. Maintenance
- Fuel Tank: Regularly check the clear fuel gauge and refill with diesel as needed. The 1.3-gallon tank provides up to 25 hours of continuous use.
- Fuel Filter: The reliable tank filter keeps fuel clean and prevents debris buildup. Periodically inspect and clean or replace the fuel filter to ensure optimal performance.
- Air Filter: Inspect and clean the air intake filter regularly to prevent dust and debris from entering the system.
- General Cleaning: Keep the exterior of the heater clean and free from dust and debris. Do not use abrasive cleaners or solvents.
7. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Error Code / Symptom | Possible Cause | Solution |
|---|---|---|
| E-01: Startup failed | Low fuel, clogged fuel line, faulty glow plug. | Check fuel level, inspect fuel line for blockages, consult manual for glow plug replacement. |
| E-06: Oil pump abnormality | Oil pump malfunction or blockage. | Inspect oil pump and connections, ensure proper fuel flow. |
| E-07: Fan abnormality | Fan motor issue or obstruction. | Check fan for obstructions, ensure clear air intake/outlet. |
| E-09: High temperature protection | Overheating due to blocked airflow or internal fault. | Ensure clear air passages, check for proper ventilation, allow unit to cool. |
| No heat output | Low fuel, incorrect settings, power issue. | Check fuel level, verify temperature settings, ensure stable power connection. |
For persistent issues, please refer to the detailed troubleshooting section in the full user manual or contact customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Orion Motor Tech |
| Model Number | DAH-5KW0-AB |
| Wattage / Output Power | 5 KW / 5000 Watts |
| Fuel Type | Diesel |
| Power Source | Diesel (with DC 12V/24V or AC 110V electrical input) |
| Tank Volume | 1.3 Gallons (approx. 5 Liters) |
| Adjustable Temperature Range | 46°F to 97°F (8°C to 36°C) |
| Operating Temperature Range | -49°F to 122°F (-45°C to 50°C) |
| Max Altitude | 18,045 ft (5500m) |
| Noise Level | Less than 45dB |
| Item Weight | 23 pounds |
| Package Dimensions | 18.75 x 15.75 x 12.75 inches |
9. Warranty & Support
Orion Motor Tech products are backed by a manufacturer's warranty against defects in materials and workmanship. For specific warranty details, duration, and terms, please refer to the warranty card included in your product packaging or visit the official Orion Motor Tech website.
For technical support, troubleshooting assistance, or to inquire about replacement parts, please contact Orion Motor Tech customer service through their official website or the contact information provided in your user manual.
10. Official Product Video
Video: An official product video from Orion Motor Tech Direct showcasing the portable diesel heater. This video provides a brief overview of the product's features and functionality.





