1. Introduction
This manual provides essential instructions for the safe and efficient operation, installation, and maintenance of your Sunster 8 kW Diesel Auxiliary Heater. This heater is designed to provide warmth for various applications, including cars, trucks, ships, buses, and caravans, operating on both 12V and 24V systems. Please read this manual thoroughly before installation and use.

Figure 1.1: Sunster 8 kW Diesel Auxiliary Heater with all included components. This image displays the main heater unit, remote control, LCD display, silencer, fuel filter, exhaust pipe, air intake pipe, scalable air outlet pipe, DC battery power cable, and various installation accessories.
2. Safety Information
Your safety is paramount. Adhere to all warnings and instructions to prevent injury or damage.
- Professional Installation Recommended: For optimal safety and performance, professional installation of this diesel heater is strongly recommended.
- Exhaust Venting: The exhaust must always be vented outdoors to prevent carbon monoxide poisoning. Never operate the heater in an enclosed space without proper ventilation.
- Overheating Protection: The unit features built-in protection against overheating (≥536°F/280°C).
- Electrical Safety: Includes protection against short circuit, over-current, over-voltage, and reverse connection. Ensure correct wiring during installation.
- Fuel Handling: Use only diesel fuel. Exercise caution when handling fuel. Do not refuel while the heater is operating or hot.
- Clearance: Maintain adequate clearance around the heater for proper airflow and to prevent fire hazards.

Figure 2.1: Enhanced Safety Features. This image highlights the visible fuel tank capacity, secure terminal design, increased foot stand for stability, and upgraded hot air outlet duct, all contributing to safer operation.
3. Product Overview
The Sunster 8 kW Diesel Auxiliary Heater is an all-in-one heating solution featuring an automatic voltage circuit compatible with both 12V and 24V systems. It includes an intelligent LCD control panel and a remote control for convenient operation. The heater is designed for rapid heating and efficient fuel consumption.
3.1 Key Features
- High Heating Power: 8 kW maximum combustion power.
- Dual Voltage Compatibility: Automatic voltage circuit for 12V and 24V systems.
- Control Options: Intelligent LCD panel and remote control for easy management.
- Fuel Efficiency: Low fuel consumption, approximately 0.16-0.45 L/h.
- Integrated Fuel Tank: 5L (1.3 Gallon) visible fuel tank.
- Safety Protections: Overheating, short circuit, over-current, over-voltage, and reverse connection protection.
- Rapid Heating: Capable of reaching 35°C from 10°C in approximately 10 minutes.
3.2 Components Identification

Figure 3.1: Product Information Diagram. This diagram labels key components of the heater: 1. Hot Air Outlet, 2. Smart LCD switch, 3. Leak-proof fuel tank cap, 4. 5L fuel tank, 5. Carrying handle, 6. Air Inlet, 7. Power input interface, 8. Exhaust outlet.
4. Setup and Installation
The Sunster 8 kW Diesel Auxiliary Heater is designed for relatively rapid assembly. However, due to the nature of diesel heating systems, professional installation is recommended to ensure safety and proper function.
4.1 Unpacking and Inspection
- Carefully unpack all components from the box.
- Verify that all items listed in the 'What's in the Box' section are present and undamaged.
- Report any missing or damaged parts to the seller immediately.
4.2 What's in the Box
- 1 x All-in-one Diesel Heater (with LCD)
- 1 x DC battery power cable
- 1 x Silencer
- 1 x Oil Filter
- 1 x Exhaust Pipe
- 1 x Air Intake Pipe
- 1 x Remote Control
- 1 x Scalable Air Outlet Pipe (6ft)
- 1 x Set of Installation Kit
- 1 x Manual
4.3 Installation Steps (General Guidelines)
The following are general steps. Refer to the detailed installation kit instructions for specific mounting and connection procedures.
- Mounting: Securely mount the heater unit using the provided bottom bracket and installation kit. Ensure the heater is on a stable, level surface.
- Exhaust System: Connect the exhaust pipe to the exhaust outlet (8) and route it safely outside the vehicle/enclosure. Install the silencer as desired. Ensure no exhaust gases can enter the heated space.
- Air Intake: Connect the air intake pipe to the air inlet (6). Ensure it draws clean air and is free from obstructions.
- Hot Air Outlet: Attach the scalable air outlet pipe to the hot air outlet (1) and direct the heated air as needed.
- Fuel Connection: Fill the 5L fuel tank (4) with diesel fuel. Ensure the leak-proof fuel tank cap (3) is securely fastened.
- Power Connection: Connect the DC battery power cable to the power input interface (7). The heater is adaptable to both 12V and 24V environments. For AC power (110-240V), an appropriate power adapter (not included) is required.

Figure 4.1: Rapid Assembly. This image illustrates the connection of the flexible and stretchable air outlet pipe and the silencer to the main heater unit, highlighting the bottom bracket for stability.

Figure 4.2: Adaptable Voltage Environment. This image shows the heater's compatibility with AC 110-240V outlets and DC 12V/24V vehicle battery power, demonstrating flexible wiring options for versatile switching.
5. Operating Instructions
The Sunster diesel heater can be operated using its intelligent LCD control panel or the included remote control.
5.1 LCD Control Panel
The color LCD screen provides real-time information and allows for various settings adjustments.
- Power On/Off: Press the power button to turn the heater on or off.
- Temperature/Gear Regulation: Use the up/down arrows to adjust the desired temperature or heating power level.
- 24-Hour Timing Function: Set a timer for the heater to automatically turn on or off.
- Language Switching: The LCD supports multiple languages, including German, English, and Russian. Refer to the LCD menu for language selection.
- Error Codes: The LCD will display error codes if a fault occurs. Consult the troubleshooting section for common issues.
5.2 Remote Control
The remote control allows for convenient operation from a distance.
- Power On/Off: Use the designated button to power the heater on or off.
- Temperature Adjustment: Adjust the temperature settings using the remote's controls.
- Pre-heating: The remote can be used to pre-heat your vehicle before entry.

Figure 5.1: Intelligent LCD Panel & Remote Control. This image details the color LCD screen with its 24-hour timing function, temperature/gear regulation, and language switching capabilities, alongside the remote control.
5.3 Fuel Consumption
The heater is designed for efficient operation, consuming approximately 0.16 to 0.45 liters of diesel per hour, depending on the heat setting. The 5-liter fuel tank provides extended operation time.

Figure 5.2: Fuel Efficiency and Heating Power. This image highlights the 8 kW maximum combustion power, over 96% combustion efficiency, 0.16-0.45 L/h fuel consumption, and the 5L (1.3 Gallon) visible fuel tank capacity.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your Sunster diesel heater.
- Fuel Filter Check: Periodically inspect and clean or replace the fuel filter to ensure a clean fuel supply.
- Exhaust System Inspection: Regularly check the exhaust pipe for blockages, leaks, or damage. Ensure it remains securely vented outdoors.
- Air Intake and Outlet: Keep the air intake and hot air outlet free from dust, debris, and obstructions. Clean as needed.
- General Cleaning: Wipe down the exterior of the heater with a damp cloth. Do not use abrasive cleaners or solvents.
- Electrical Connections: Periodically check all electrical connections for tightness and signs of corrosion.
- Fuel Tank: Ensure the fuel tank is clean and free of contaminants. Avoid running the tank completely dry to prevent air entering the fuel lines.
7. Troubleshooting
If you encounter issues with your heater, refer to the following common troubleshooting steps. For persistent problems, contact customer support.
7.1 Common Issues and Solutions
- Heater Does Not Turn On:
- Check power connections and ensure the battery voltage is correct (12V or 24V).
- Verify the power cable is securely connected to the heater and power source.
- Check for blown fuses in the power circuit.
- No Heat Output:
- Ensure there is sufficient diesel fuel in the tank.
- Check the fuel filter for blockages.
- Inspect the air intake and exhaust for obstructions.
- Verify the temperature setting is above the ambient temperature.
- Unusual Noise or Smoke:
- Immediately turn off the heater.
- Check the exhaust system for leaks or blockages.
- Inspect the air intake for foreign objects.
- If the issue persists, discontinue use and seek professional assistance.
- LCD Displays Error Code:
- Consult the heater's specific error code list (if provided in the included manual) to identify the problem.
- Common error codes relate to low voltage, overheating, or fuel supply issues.
8. Specifications
| Attribute | Value |
|---|---|
| Brand | Sunster |
| Model Number | SKUW025013 |
| Heating Power | 8 kW |
| Voltage Compatibility | 12V / 24V (Automatic Circuit) |
| Fuel Type | Diesel |
| Fuel Tank Capacity | 5 Liters (1.3 Gallons) |
| Fuel Consumption | 0.16 - 0.45 L/h |
| Item Weight | 22.6 pounds |
| Package Dimensions | 17.87 x 14.21 x 11.61 inches |
| Control Method | LCD Panel, Remote Control |
| Safety Features | Overheating, Short Circuit, Over-current, Over-voltage, Reverse Connection Protection |
9. Warranty and Support
For information regarding warranty coverage, technical support, or replacement parts, please refer to the documentation included with your purchase or contact the seller directly. Keep your proof of purchase for warranty claims.







