1. Konec produktuview
The Danfoss BFP 21 L3 is a high-quality diesel oil pump designed for reliable performance in various heating and industrial applications. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your pump.
Video: Konecview of various Danfoss industrial components, showcasing the brand's product range.
2. Bezpečnostní informace
Always observe general safety precautions when working with fuel systems and electrical components. Ensure the power supply is disconnected before any installation or maintenance work. Refer to local regulations and standards for specific safety requirements.
- Only qualified personnel should install and service the pump.
- Používejte vhodné osobní ochranné prostředky (OOP).
- Ensure proper ventilation when working with diesel fuel.
- Do not operate the pump if any damage is visible.
3. Instalace a nastavení
Proper installation is crucial for the optimal performance and longevity of your Danfoss BFP 21 L3 pump. Follow these guidelines:
- Montáž: Mount the pump securely in a stable position, ensuring it is easily accessible for maintenance. The pump can be mounted in any position, but ensure the shaft is horizontal for best performance.
- Palivové potrubí: Connect the fuel supply line to the 'V' (Vacuum/Suction) port and the pressure line to the 'P' (Pressure) port. The 'S' port is for the return/drain line. Ensure all connections are tight and leak-free. Observe the flow direction indicated by the arrow on the pump body.
- Elektrické připojení: Connect the pump to the appropriate power supply as specified on the product label. Ensure correct wiring to prevent damage to the pump or system.
- Krvácející: After installation, the system must be properly bled to remove any air from the fuel lines. Consult your burner or system manual for specific bleeding procedures.

Image: Danfoss BFP 21 L3 Diesel Oil Pump, showing the 'P' (Pressure), 'V' (Vacuum/Suction), and 'S' (Return/Drain) ports, along with the flow direction arrow and 'Bio 10' compatibility marking.

Obrázek: Boční view of the Danfoss BFP 21 L3 Diesel Oil Pump, highlighting its compact design.

Image: Another perspective of the Danfoss BFP 21 L3 Diesel Oil Pump, showing the electrical connector.
4. Provoz
Once installed and bled, the Danfoss BFP 21 L3 pump operates automatically as part of your heating or industrial system. It is designed to deliver a consistent flow of diesel oil to the burner or application.
- Ensure the fuel tank has an adequate supply of clean diesel fuel.
- Monitor system pressure and flow to ensure optimal performance.
- The pump is compatible with up to 10% biodiesel (Bio 10).
5. Údržba
Regular maintenance helps ensure the longevity and efficiency of your pump.
- Výměna filtru: The pump typically incorporates a filter. Check and replace the filter cartridge regularly according to the system's maintenance schedule or if flow issues occur.
- Kontrola těsnosti: Periodically inspect all fuel line connections for any signs of leaks. Tighten connections as necessary.
- Čištění: Udržujte vnější povrch čerpadla čistý a bez prachu a nečistot.
- Těsnění hřídele: Monitor the shaft seal for any signs of leakage. If a leak is detected, the seal should be replaced by a qualified technician.
6. Řešení problémů
If you encounter issues with your Danfoss BFP 21 L3 pump, refer to the following common problems and solutions:
| Problém | Možná příčina | Řešení |
|---|---|---|
| No fuel flow | Empty fuel tank, clogged filter, air in system, faulty motor | Check fuel level, replace filter, bleed system, check motor connections/function |
| Reduced pressure/flow | Partially clogged filter, air in system, worn pump components | Replace filter, bleed system, inspect pump for wear (professional service recommended) |
| Čerpadlo je hlučné | Air in system, cavitation, loose mounting | Bleed system, check for restrictions in suction line, tighten mounting bolts |
| Únik paliva | Volné spoje, poškozená těsnění | Tighten connections, replace damaged seals (professional service recommended) |
7. Specifikace
Key technical specifications for the Danfoss BFP 21 L3 Diesel Oil Pump (071N0107):
- Model: BFP 21 L3
- Číslo dílu: 071N0107
- Typ: Dieselové olejové čerpadlo
- Kompatibilita: Up to 10% Biodiesel (Bio 10)
- Původ: Vyrobeno v Dánsku
- Hmotnost balení: Přibližně 1.9 kg
- Rozměry balení: Přibližně 20 cm (délka) x 18 cm (šířka) x 18 cm (výška)
For detailed performance curves and specific pressure/flow ratings, please refer to the official Danfoss product datasheet for the BFP 21 L3 series.
8. Uživatelské tipy
- Always use clean, high-quality diesel fuel to prevent clogging and premature wear.
- Regularly inspect and clean the fuel filter to maintain optimal pump performance.
- Ensure all connections are properly sealed to prevent air ingress, which can lead to cavitation and reduced efficiency.
- If the pump is to be stored for an extended period, ensure it is drained of fuel and stored in a dry, protected environment.
9. Podpora
For further technical assistance, spare parts, or service, please contact your authorized Danfoss distributor or visit the official Danfoss website. When contacting support, please have your pump's model number (BFP 21 L3) and part number (071N0107) readily available.





