KROAK 5-8KW Diesel Air Heater User Manual

1. Introduction

The KROAK 5-8KW Diesel Air Heater is a versatile and efficient heating solution designed for a wide range of applications, including RVs, vans, boats, campers, and various indoor spaces. This manual provides essential information for the safe and effective installation, operation, and maintenance of your diesel air heater.

Figure 1: KROAK 5-8KW Diesel Air Heater and included accessories.

Key Features:

• Efficient Heating: 8KW heating power, suitable for 12V & 24V systems, capable of heating 20-25 m² (215-269 ft²) areas rapidly using a sandblasting aluminum heat exchanger.
• Low Energy Consumption: Precision low-noise fuel pump, consuming approximately 1 gallon per night (0.16-0.62 L/h). Features a 10 L (2.6 gal) fuel tank for up to 16 hours of continuous heat.
• Intelligent Dual Control: Includes a 32 ft long-distance remote control and an LCD panel for easy operation. Allows preheating, engine warming, and window defrosting.
• Altitude Mode: Designed to operate effectively at altitudes below 3000 m (9843 ft).
• Wide Operating Temperature: Functions reliably in temperatures ranging from -40°C to 40°C (-40°F to 104°F).
• Secure and Reliable: Incorporates multiple safety features including constant temperature control, timing function, voice broadcasting, preheating, and overheating protection (≥270°C / 518°F).

Figure 2: Wide application scenarios including RVs, vans, boats, and various vehicles/spaces.

2. Package Contents

Please check the package carefully upon receipt to ensure all components are present and undamaged:

• Heater Host
• LCD Switch
• Remote Control
• 10L Fuel Tank
• User Manual
• Fixed Cable
• Tubing
• Fixture Accessories Set (various screws, nuts, clips, clamps)
• Oil Filter
• Oil Pump
• Vents
• Air Filter
• T Connector
• Oil Pump Clip
• Exhaust Silencer
• Intake Pipe
• Exhaust Pipe
• Air Outlet Pipe
• Wire Harness
• Fixed Plate
• Mounting Plate
• Inlet and Outlet Pipes & Cable
• Fuel Hose
• Muffler
• Blowpipe Clamp

Figure 3: Comprehensive diagram of all included parts and accessories.

3. Specifications

Figure 4: Product dimensions and key specifications.

4. Safety Features

Your KROAK Diesel Air Heater is equipped with multiple safety mechanisms to ensure reliable and worry-free operation:

• Overheating Protection: The heater will automatically shut down if the internal temperature exceeds 270°C (518°F).
• Short Circuit Protection: Safeguards against electrical short circuits.
• Reverse Connection Protection: Prevents damage from incorrect power polarity.
• Overvoltage Protection: Protects the unit from excessive voltage input.
• Constant Temperature Control: Maintains a stable desired temperature.
• Timing Function: Allows for scheduled operation.
• Voice Broadcasting: Provides audible alerts and status updates.

Figure 5: Multi-layer protection for safe use.

5. Installation Guidelines

Proper installation is crucial for the safe and efficient operation of your heater. It is recommended that installation be performed by a qualified professional.

General Steps:

1. Mounting: Select a suitable, stable location for the heater host. Use the provided Fixed Plate and Mounting Plate along with machine fixing accessories (screws, nuts, clips, clamps) to securely fasten the heater. Ensure adequate clearance around the unit for air circulation and maintenance.
2. Fuel System Connection: Install the 10L fuel tank in a safe and accessible location. Connect the fuel hose from the tank to the oil pump, and then from the oil pump to the heater. Use the oil filter and oil pump clip as directed. Ensure all fuel connections are tight and leak-free.
3. Exhaust System: Connect the exhaust pipe to the heater's exhaust port. Route the exhaust pipe safely away from flammable materials and ensure it exits the vehicle/space without obstruction. Use the exhaust silencer and blowpipe clamp.
4. Air Intake and Outlet: Connect the intake pipe to the heater's air intake and the air outlet pipe to the air outlet grille. Ensure these are clear of obstructions and positioned to distribute heat effectively.
5. Electrical Wiring: Connect the wire harness to the heater and to a suitable 12V or 24V power source, ensuring correct polarity (Reverse Connection Protection is present, but correct wiring is always best practice). Connect the LCD switch and remote control receiver (if separate) to the wire harness.
6. Initial Check: After installation, double-check all connections (fuel, exhaust, air, electrical) for security and integrity before first use.

Warning: Incorrect installation can lead to fire, carbon monoxide poisoning, or other hazards. Always follow local regulations and safety standards.

6. Operation

Your KROAK Diesel Air Heater can be controlled via the LCD panel or the included remote control.

Control Modes:

Figure 6: LCD panel and remote control for convenient operation.

• LCD Panel: The large LCD display provides real-time status, temperature, and time information. Use the rotary switch and buttons to adjust settings, set timers, and monitor the heater's performance. Temperature can be adjusted from 8°C to 36°C (46°F to 96.8°F).
• Remote Control: The remote control allows you to power the heater ON/OFF and adjust settings from a distance of up to 32 ft, enabling you to preheat your vehicle or space before entry.

Altitude Mode:

The heater features an altitude mode, allowing it to work efficiently at elevations up to 3000 m (9843 ft). This mode adjusts the fuel-air mixture to compensate for lower oxygen levels, ensuring stable combustion and consistent heating performance.

Figure 7: Altitude mode operation and reference chart.

Efficient and Quiet Heating:

The KROAK Diesel Air Heater is designed for efficient heat distribution across 20-25 m² areas, providing rapid heating and a stable fuel supply for 14-60 hours depending on settings. Its low-noise design ensures a comfortable and quiet environment.

Figure 8: Low-noise heating for high comfort.

Figure 9: Efficient heating for optimal performance.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your diesel air heater.

• Cleaning: Periodically clean the exterior of the heater and ensure the air intake and outlet grilles are free from dust and debris.
• Fuel Filter: Inspect and replace the fuel filter as needed to prevent contaminants from reaching the fuel pump and combustion chamber.
• Exhaust System: Check the exhaust pipe and silencer for any blockages, damage, or leaks. Ensure exhaust gases are safely expelled.
• Electrical Connections: Verify that all electrical connections are secure and free from corrosion.
• General Inspection: Regularly inspect all components for signs of wear or damage. Address any issues promptly.

8. Troubleshooting

If you encounter issues with your heater, consider the following general troubleshooting steps:

• Heater Not Starting: Check the power supply and ensure all electrical connections are secure. Verify there is sufficient fuel in the tank and the fuel line is not blocked.
• Insufficient Heat: Ensure the air intake and outlet are not obstructed. Check for proper fuel flow and verify the temperature settings.
• Unusual Noise: Inspect for loose components or obstructions in the fan or exhaust system.
• Error Codes: Refer to the LCD display for any error codes and consult the full user manual (if provided separately) for specific interpretations and solutions.

For persistent problems, contact customer support.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the seller/manufacturer directly. Keep your proof of purchase for warranty claims.