Shut off the boiler completely by locating and switching the toggle in the back.
Access the bleeder valve on the side of the fuel pump. Place your three-eighths-inch wrench around the nut on the bleeder valve.
Unscrew the bleeder valve with the wrench. In the opening, insert the one-fourth-inch nylon tubing. Extend the tubing to the can of oil.
Switch the burner back on with the toggle switch and tighten the bleeder valve. The Burnham Boiler will ignite and provide heat for your comfort.