1. บทนำ
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Danfoss BFP 21 L3 071N0107 Burner Oil Pump. Please read this manual thoroughly before attempting any installation or operation. Keep this manual for future reference.

2. ข้อมูลด้านความปลอดภัย
Always observe general safety precautions when working with oil burner components. Improper installation, adjustment, or maintenance can lead to serious injury or property damage. Only qualified personnel should install and service this equipment.
- Disconnect power to the burner system before performing any work on the oil pump.
- ตรวจสอบให้แน่ใจว่ามีการระบายอากาศที่เหมาะสมในระหว่างการติดตั้งและการใช้งาน
- Handle fuel oil with care, following all local regulations and safety guidelines.
- Verify all connections are secure and leak-free before restoring power.
- Do not operate the pump if it is damaged or leaking.
3. สินค้าหมดview
The Danfoss BFP 21 L3 is a high-quality burner oil pump designed for small and medium-sized oil furnaces. It is suitable for use with diesel or kerosene fuels and supports both single and dual tube operation modes. Key features include:
- Designed for combustion applications.
- Built-in pressure regulating valve for precise control.
- Equipped with a solenoid valve for reliable shut-off.
- Integrated barrel filter for fuel cleanliness.

4. ข้อมูลจำเพาะ
| พารามิเตอร์ | ค่า |
|---|---|
| ซีรี่ส์ซีรี่ย์ | BFP 21 L3 (also R3, R5, L5 variants) |
| อัตราการไหลสูงสุด | Up to 42 L/H |
| ความเข้ากันได้ของเชื้อเพลิง | ดีเซลหรือน้ำมันก๊าด |
| โหมดการทำงาน | Single or Dual Tube |
| ช่วงแรงดัน | 7-20 บาร์ |
| Factory Pressure Setting | 10 ± 1 บาร์ |
| สูงสุด ความดันขาเข้า | 2 บาร์ |
| อุณหภูมิสิ่งแวดล้อม | -20°C ถึง 70°C |
| อุณหภูมิภายใน | 0°C ถึง 70°C |
| Solenoid Valve Power | 9W |
| แหล่งจ่ายไฟ | 220-240V 50/60Hz |
| Nozzle Flow Rate (Reference) | 4.3 cSt at 10 bar, 2800 RPM |

5. การติดตั้งและการตั้งค่า
Installation should only be performed by a qualified technician. Ensure all local codes and regulations are followed.
5.1 การติดตั้งทางกายภาพ
Mount the pump securely to the burner assembly. Refer to the dimensional drawing for mounting points and overall dimensions.

5.2 พอร์ตเชื่อมต่อ
Identify and connect the fuel lines and gauges to the appropriate ports as indicated in the diagram below:
- พี1: Pressure regulation adjustment
- S: Inlet G1/4" (Fuel supply)
- R: Oil return port G1/4" (Return line to tank)
- E: Nozzle interface G1/8" (Connection to burner nozzle)
- P: Pressure gauge connection G1/8"
- V: Vacuum gauge connection G1/8"
- H: Internal Filter location

5.3 ทิศทางการหมุน
Ensure the pump's rotation direction matches the burner motor. The BFP 21 L3 model indicates a counterclockwise rotation. If your model is BFP 21 R3, it would be clockwise. Incorrect rotation can damage the pump and prevent proper operation.
6. การดำเนินการ
Once installed and all connections are verified, the pump will draw fuel from the tank, pressurize it, and deliver it to the burner nozzle. The built-in pressure regulating valve maintains the desired pressure for optimal combustion.
6.1 Hydraulic Flow
The hydraulic diagram illustrates the internal flow paths of the oil pump:
- Green lines: Represent the inlet fuel path.
- Red lines: Represent the pressurized oil outlet path to the nozzle.
- Yellow lines: Represent the return oil path back to the tank.

The solenoid valve controls the fuel flow to the nozzle, ensuring quick and clean shut-off when the burner is not operating.
7. การบำรุงรักษา
Regular maintenance is crucial for the longevity and efficient operation of your Danfoss oil pump. It is recommended that maintenance be performed by a qualified service technician.
- การเปลี่ยนตัวกรอง: The internal barrel filter (H) should be inspected and replaced periodically, typically annually or as recommended by the burner manufacturer, to prevent clogging and ensure clean fuel delivery.
- การตรวจสอบแรงดัน: Periodically check the operating pressure using a pressure gauge connected to port 'P'. Adjust if necessary using the P1 screw.
- การตรวจสอบการรั่วไหล: Regularly inspect all fuel lines and connections for any signs of leaks. Address any leaks immediately.
- การทำความสะอาดทั่วไป: รักษาความสะอาดภายนอกของปั๊มให้ปราศจากฝุ่นและสิ่งสกปรก
8 การแก้ไขปัญหา
This section provides general troubleshooting tips. For complex issues, consult a qualified service technician.
| ปัญหา | สาเหตุที่เป็นไปได้ | สารละลาย |
|---|---|---|
| No fuel delivery | Clogged filter, air in line, incorrect rotation, faulty solenoid valve, no fuel in tank. | Check fuel level, replace filter, bleed air from system, verify rotation, check solenoid valve wiring/function. |
| แรงดันต่ำ | Clogged filter, worn pump components, air in line, pressure regulating valve issue. | Replace filter, bleed air, adjust pressure regulating valve (P1), inspect pump for wear. |
| การรั่วไหลของน้ำมัน | Loose connections, damaged seals, cracked casing. | Tighten connections, replace seals, replace pump if casinจีได้รับความเสียหาย |
| ปั๊มมีเสียงดัง | Air in line, cavitation, worn bearings, foreign object. | Bleed air, check fuel supply, inspect for obstructions, consider professional service. |
9. เคล็ดลับผู้ใช้
ไม่มีคำแนะนำเฉพาะสำหรับผู้ใช้จาก reviews or Q&A for this product. However, general best practices for oil burner pumps include:
- Always use clean, appropriate fuel as specified by your burner manufacturer.
- Ensure your fuel tank is regularly cleaned to prevent sediment from entering the pump.
- Consider having your entire heating system professionally inspected annually.
10. การรับประกันและการสนับสนุน
For warranty information and technical support, please contact your authorized Danfoss dealer or the point of purchase. Keep your purchase receipt and product model number (BFP 21 L3 071N0107) handy when contacting support.
This product is manufactured in Denmark.





