1. Introducció
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.
Característiques principals:
- Calefacció eficient: 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.
- Baix consum d'energia: 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.
- Control dual intel·ligent: Includes a 32 ft long-distance remote control and an LCD panel for easy operation. Allows preheating, engine warming, and window defrosting.
- Mode d'altitud: Designed to operate effectively at altitudes below 3000 m (9843 ft).
- Amplia temperatura de funcionament: Functions reliably in temperatures ranging from -40°C to 40°C (-40°F to 104°F).
- Segur i fiable: 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. Contingut del paquet
Please check the package carefully upon receipt to ensure all components are present and undamaged:
- Amfitrió de l'escalfador
- Interruptor LCD
- Control remot
- Dipòsit de combustible de 10L
- Manual d'usuari
- Cable fix
- Tubs
- Fixture Accessories Set (various screws, nuts, clips, clamps)
- Filtre d'oli
- Bomba d'oli
- Vents
- Filtre d'aire
- Connector T
- Clip de la bomba d'oli
- Silenciador d'escapament
- Tub d'admissió
- Tub d'escapament
- Tub de sortida d'aire
- Arnès de filferro
- Placa Fixa
- Placa de muntatge
- Inlet and Outlet Pipes & Cable
- Mànega de combustible
- Silenciador
- Blowpipe Clamp

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

Figura 4: Dimensions del producte i especificacions clau.
| Atribut | Valor |
|---|---|
| Thermal Power (W) | 2000-8000W (5-8KW) |
| Voltage | 12V / 24V Universal |
| Tipus de combustible | Oli dièsel |
| Consum de combustible (L/h) | 0.16-0.62 L/h |
| Sortida d’aire | Large Single Hole |
| Sistema de control remot | Control remot |
| Temperatura de funcionament | -40 °C ~ +80 °C (-40 °F ~ 104 °F) |
| Material | Plàstic i Metall |
| Longitud de l'element | 33.5 cm (13.1 polzades) |
| Amplada de l'element | 13.5 cm (5.3 polzades) |
| Alçada de l'element | 13.5 cm (5.3 polzades) |
| Diàmetre de l'article (sortida d'aire) | 7.5 cm (2.83 polzades) |
| Pes de l'article | 7 kg |
| Certificacions | CE, RoHS, FCC |
4. Característiques de seguretat
Your KROAK Diesel Air Heater is equipped with multiple safety mechanisms to ensure reliable and worry-free operation:
- Protecció contra el sobreescalfament: The heater will automatically shut down if the internal temperature exceeds 270°C (518°F).
- Protecció contra curtcircuits: Safeguards against electrical short circuits.
- Protecció de connexió inversa: Prevents damage from incorrect power polarity.
- Overvoltage Protecció: Protects the unit from excessive voltage entrada.
- Control de temperatura constant: Maintains a stable desired temperature.
- Funció de cronometratge: Permet una operació programada.
- Transmissió de veu: Provides audible alerts and status updates.

Figure 5: Multi-layer protection for safe use.
5. Pautes d'instal·lació
Proper installation is crucial for the safe and efficient operation of your heater. It is recommended that installation be performed by a qualified professional.
Passos generals:
- Muntatge: 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.
- Connexió del sistema de combustible: 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.
- Sistema d'escapament: 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.
- Entrada i sortida d'aire: 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.
- Cablejat elèctric: 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.
- Comprovació inicial: 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. Funcionament
Your KROAK Diesel Air Heater can be controlled via the LCD panel or the included remote control.
Modes de control:

Figure 6: LCD panel and remote control for convenient operation.
- Panell LCD: 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).
- Comandament a distància: 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.
Mode d'altitud:
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. Manteniment
Un manteniment regular garanteix la longevitat i el rendiment òptim del vostre escalfador d'aire dièsel.
- Neteja: Periodically clean the exterior of the heater and ensure the air intake and outlet grilles are free from dust and debris.
- Filtre de combustible: Inspect and replace the fuel filter as needed to prevent contaminants from reaching the fuel pump and combustion chamber.
- Sistema d'escapament: Check the exhaust pipe and silencer for any blockages, damage, or leaks. Ensure exhaust gases are safely expelled.
- Connexions elèctriques: Verifiqueu que totes les connexions elèctriques siguin segures i no presentin corrosió.
- Inspecció general: Regularly inspect all components for signs of wear or damage. Address any issues promptly.
8. Solució De Problemes
Si teniu problemes amb el vostre escalfador, tingueu en compte els passos generals següents per resoldre problemes:
- L'escalfador no s'engega: 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.
- Calor insuficient: Ensure the air intake and outlet are not obstructed. Check for proper fuel flow and verify the temperature settings.
- Soroll inusual: Inspect for loose components or obstructions in the fan or exhaust system.
- Codis d'error: 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. Garantia i Suport
Per obtenir informació sobre la garantia, assistència tècnica o consultes sobre el servei tècnic, consulteu la documentació que s'inclou amb la compra o poseu-vos en contacte directament amb el venedor/fabricant. Conserveu el comprovant de compra per a reclamacions de garantia.





