1. Introduction
This instruction manual provides essential information for the safe and efficient installation, operation, and maintenance of the Danfoss BFP 21 L3 Oil Burner Pump, model 071N0107. Please read this manual thoroughly before attempting any procedures to ensure proper function and to prevent damage or injury.
2. Consignes de sécurité
AVERTISSEMENT: To prevent health and bodily harm, installation, maintenance, initial commissioning, repairs, and other inspections must be carried out by authorized professionals, such as contractual installation companies or qualified technicians. Improper installation or service can lead to serious injury or equipment damage.
- Always disconnect power to the burner system before performing any work on the pump.
- Portez un équipement de protection individuelle (EPI) approprié lors de l'installation et de la maintenance.
- Assurez-vous que tous les raccords sont bien fixés et étanches afin de prévenir tout risque d'incendie.
- N’utilisez pas la pompe si elle est endommagée ou si elle fonctionne mal.
3. Produit terminéview
The Danfoss BFP 21 L3 is a high-quality oil burner pump designed for reliable fuel delivery in heating systems. This model, 071N0107, is a direct replacement for the BFP 31 series and features a left rotation and an 8 mm shaft diameter.

Figure 3.1 : Face avant view of the Danfoss BFP 21 L3 Oil Burner Pump. This image shows the main body of the pump with its shaft extending forward, ready for connection to a motor.

Figure 3.2 : Côté view of the Danfoss BFP 21 L3 Oil Burner Pump, highlighting the product label. The label clearly displays "BFP 21 L3" and "071N0107", along with other technical markings and certifications.

Figure 3.3 : Arrière view of the Danfoss BFP 21 L3 Oil Burner Pump, focusing on the shaft connection point. This perspective shows the robust construction around the shaft, indicating its connection to the burner motor.
Caractéristiques principales :
- Model: BFP 21 L3 (071N0107)
- Replaces: BFP 31 series
- Rotation: Left
- Shaft Diameter: 8 mm
4. Configuration et installation
Installation of the Danfoss BFP 21 L3 oil burner pump should only be performed by a qualified technician. Incorrect installation can lead to system malfunction, fuel leaks, or fire hazards. The following steps are general guidelines; always refer to the specific burner manufacturer's instructions and local codes.
- Préparation: Ensure the burner system is completely shut down and power is disconnected. Close all fuel supply valves.
- Retrait de l'ancienne pompe : Carefully disconnect fuel lines and electrical connections from the old pump. Note the orientation and connections for proper reinstallation. Remove mounting bolts and detach the old pump.
- Mounting the New Pump: Position the new Danfoss BFP 21 L3 pump, ensuring the shaft aligns correctly with the motor coupling. Secure the pump using the appropriate mounting bolts.
- Connecting Fuel Lines: Connect the suction and return fuel lines to the designated ports on the pump. Ensure all connections are tight and sealed to prevent leaks.
- Connexions électriques : Reconnect electrical wiring according to the burner manufacturer's diagram. Verify correct polarity and secure all connections.
- Amorçage de la pompe : After installation, the pump may need to be primed to remove air from the fuel lines. Follow the burner manufacturer's procedure for priming.
- Vérification des fuites : Before full operation, perform a thorough leak check on all fuel connections.
- Démarrage initial: Restore power and fuel supply. Carefully observe the burner's operation during initial start-up, checking for proper ignition and fuel delivery.
5. Mode d'emploi
The Danfoss BFP 21 L3 oil burner pump operates as an integral part of your heating system. Once properly installed and commissioned by a professional, its operation is typically automatic, controlled by the burner's control unit.
- Opération automatique: The pump will engage and deliver fuel when the burner control calls for heat.
- Réglage de la pression : The pump's pressure is factory-set but may require fine-tuning during commissioning. This adjustment should only be performed by a qualified technician using appropriate pressure gauges.
- Surveillance: Regularly monitor your heating system for unusual noises, fuel odors, or performance issues.
6. Entretien
Regular maintenance is crucial for the longevity and efficient operation of your Danfoss BFP 21 L3 oil burner pump and the entire heating system. All maintenance procedures should be carried out by a qualified service technician.
- Inspection annuelle: Have the pump and burner system inspected annually by a professional. This includes checking for leaks, wear on components, and proper pressure settings.
- Remplacement du filtre : The oil filter (if external to the pump) should be replaced regularly as recommended by the burner manufacturer. A clogged filter can strain the pump and reduce efficiency.
- Nettoyage/remplacement des buses : The burner nozzle should be cleaned or replaced as part of routine maintenance to ensure proper fuel atomization.
- Vérification du joint d'arbre : Inspect the pump shaft seal for any signs of oil leakage. Address any leaks promptly.
7. Dépannage
This section provides general troubleshooting tips. For complex issues or if you are unsure, always contact a qualified service technician.
| Problème | Cause possible | Solution |
|---|---|---|
| Le brûleur ne s'allume pas | No fuel delivery, air in lines, clogged nozzle, faulty ignition. | Check fuel supply, prime pump, inspect/clean nozzle, check ignition system. Contacter le technicien. |
| Pompe faisant un bruit inhabituel | Air in fuel, worn bearings, foreign object. | Check for air leaks in suction line, inspect pump. Contacter le technicien. |
| Oil leakage from pump | Connexions desserrées, joints endommagés. | Tighten connections, replace seals. Contacter le technicien. |
| Inconsistent flame or poor combustion | Incorrect pressure, partially clogged nozzle, air in fuel. | Check/adjust pressure, clean/replace nozzle, bleed air. Contacter le technicien. |
8. Spécifications
Below are the key specifications for the Danfoss BFP 21 L3 Oil Burner Pump (Model 071N0107).
- Fabricant: DANFOSS
- Numéro de modèle : 071N0107 / 88.70100-0040
- Dimensions du produit : Environ 10 x 10 x 10 cm (3.94 x 3.94 x 3.94 pouces)
- Poids de l'article : Approximately 1.08 kilograms (2.38 pounds)
- Rotation: Gauche
- Diamètre de l'arbre : 8 mm
- Piles requises : Non
- Piles incluses : Non
- ASIN: B07DCVM3WW
- Date de mise en ligne sur Amazon : 15 avril 2022
9. Garantie et assistance
For warranty information and technical support, please refer to the documentation provided with your purchase or contact your authorized Danfoss dealer or service center. Keep your proof of purchase for warranty claims.
Danfoss does not provide specific information regarding spare parts availability directly to end-users. Please consult with your authorized service provider for spare parts inquiries.





