Instructions for Bleeding the Oil Line on a Beckett Oil Furnace

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A Beckett oil furnace is an oil burner made for residential heating applications. Although the thermostat and heating functions are all computer controlled, bleeding the line to purge air bubbles will need to be done manually. Air can get trapped in the oil lines for a number of reasons, most commonly from changing an older unit out to a new Beckett furnace, or changing out the oil filter for a new one. Once an oil line connection is breached, much the same as in brake lines on a car, air will seep into the lines and need to be bled.

  • Open the oil lines that supply fuel to your Beckett furnace. For bleeding purposes only, close the air band and slightly open the shutter, which will be found at the front of the unit directly behind the oil pump that feeds the burner. The shutter is a flattened plate mounted to the outside of the air band, and these are both used to regulate fresh air going to the burner. Both these two functions will be returned to normal when bleeding is complete.

  • Turn the thermostat up so that it reads substantially above room temperature. In essence, you will be calling for heat. Close the line voltage switch to start the actual burner.

  • Start the burner, then press the "Reset" button and hold it for approximately 15 seconds, At that point, a yellow light will go on and the burner will shut off. Release the reset button at this point; the yellow light will go out and the burner will start up again. You have now activated the line-bleeding process.

  • Click or tap the reset button once again. The yellow light will come on and the priming sequence will initiate. It will prime the pump and bleed the lines of air bubbles. The furnace will automatically stay in this mode for the next four minutes.

  • Turn down the thermostat at the end of the four-minute interval when you see that the yellow light goes off. At this point, the lines will be bled, and the furnace will go into normal operating mode.

Tips & Warnings

  • Familiarity with the controls on a Beckett oil furnace is a must when bleeding the lines. If you do not feel comfortable with the knowledge you possess about the system, you may wish to call in a qualified HVAC technician to accomplish this task.

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