Oil Furnace Adjustments
After inspecting the heating system and making any necessary service and repairs, the oil furnace should be adjusted for maximum operating efficiency. This is accomplished by taking four measurements through a small (1⁄2 inch diameter) hole in the flue pipe very close to the furnace. First, run the furnace for at least 15 minutes to establish a steady and uniform flue pressure. Then, take the following measurements:
1. Check the smoke contact of the flue gases.
2. Check the draft pressure of the flue gases.
3. Check the temperature of the flue gases.
4. Check the carbon monoxide or oxygen content of the flue gases.
Adjustments to the oil furnace and the burner will be made on the basis of the four measurements listed above. Adjustment must be made in accordance with the furnace, burner, or control manufacturer’s procedures listed in its service, maintenance, and repair manuals.