A danfoss oil pump is a device that delivers oil to a burner or boiler at a certain pressure. The pressure of the oil pump affects the combustion efficiency and performance of the heating system. Therefore, it is important to adjust the pressure of the oil pump according to the specifications of the manufacturer and the type of fuel used.
There are different models of danfoss oil pumps, such as BFP, BFP LE, BFP L, and BFP S. Each model has a different pressure range and adjustment method. In this article, we will focus on the BFP model, which is one of the most common and widely used oil pumps.
Steps to Adjust the Pressure of a Danfoss BFP Oil Pump
To adjust the pressure of a danfoss BFP oil pump, you will need the following tools and equipment:
- A pressure gauge or a manifold set
- A 4mm and a 6mm allen wrench
- A screwdriver
- A wrench
- A rag
- A container to collect the excess oil
Before you start, make sure that the power supply to the burner or boiler is turned off and that the oil supply valve is closed. Also, wear protective gloves and goggles to avoid contact with hot oil or parts.
Follow these steps to adjust the pressure of a danfoss BFP oil pump:
- Locate the danfoss BFP oil pump on the burner or boiler. It is usually mounted on the side or the bottom of the burner or boiler. It has a black or silver metal casing with a red or yellow plastic cover.
- Remove the plastic cover by unscrewing the four screws on the corners. You will see the pressure adjustment screw and the pressure test port on the top of the oil pump.
- Connect the pressure gauge or the manifold set to the pressure test port. Use a wrench to tighten the connection and prevent any oil leakage.
- Open the oil supply valve and turn on the power supply to the burner or boiler. The oil pump will start to operate and deliver oil to the burner or boiler.
- Read the pressure reading on the gauge or the manifold set. Compare it with the recommended pressure range for your burner or boiler. You can find the recommended pressure range on the label of the oil pump or in the manual of the burner or boiler.
- If the pressure reading is within the recommended range, you do not need to adjust the pressure. If the pressure reading is too high or too low, you need to adjust the pressure by turning the pressure adjustment screw.
- To adjust the pressure, loosen the set screw on the side of the pressure adjustment screw with a 4mm allen wrench. Then, use a 6mm allen wrench to turn the pressure adjustment screw clockwise to increase the pressure or counter-clockwise to decrease the pressure. You can use the following table as a reference for how much to turn the screw:
| Pressure range (bar) | Turn per 0.1 bar |
|---|---|
| 7 – 14 | 1/6 |
| 10 – 20 | 1/8 |
| 14 – 28 | 1/10 |
For example, if your pressure range is 10 – 20 bar and you want to increase the pressure by 0.2 bar, you need to turn the screw clockwise by 1/4 turn (1/8 x 2). 8. After adjusting the pressure, tighten the set screw on the side of the pressure adjustment screw with a 4mm allen wrench. Read the pressure reading again on the gauge or the manifold set and make sure it is within the recommended range. 9. Disconnect the pressure gauge or the manifold set from the pressure test port. Use a rag to wipe off any oil residue and collect the excess oil in a container. Replace the plastic cover and secure it with the four screws. 10. Turn off the power supply to the burner or boiler and close the oil supply valve. Your danfoss BFP oil pump pressure adjustment is complete.
Tips and Warnings
- Always follow the safety precautions and instructions of the manufacturer when adjusting the pressure of the oil pump.
- Do not adjust the pressure of the oil pump beyond the maximum or minimum limits specified by the manufacturer. Doing so may damage the oil pump or the burner or boiler.
- Do not adjust the pressure of the oil pump too frequently or too drastically. Doing so may cause instability or inconsistency in the oil flow and the combustion process.
- Check the pressure of the oil pump regularly and adjust it if necessary. The pressure of the oil pump may change over time due to wear and tear, oil quality, temperature, or other factors.
- If you encounter any problems or difficulties in adjusting the pressure of the oil pump, contact a qualified technician or service provider for assistance.
