HVAC Procedure and Performance Guide

Adjust burner oil system

Training for this procedure can be found in these courses:

                         131 – Oil Heat l  and  161 – Boilers l


Burner oil system must be tested and adjusted according to manufacturer’s specifications.  Fuel supply to oil pump and nozzle pressure must be within specifications and fuel shut-off valve must operate as specified.  Applicable safety procedures must be followed


    1. Review manufacturer’s specifications.
    2. Determine type of fuel supply system and tank location:
    3. One or two pipe.
    4. Tank level above or below burner.
    5. Determine required nozzle pressure and expected vacuum level at pump inlet.
    6. Collect tools, equipment and materials.
    7. Put on safety and protective equipment and apparel.
    8. Turn off furnace, shut off oil supply to pump and let furnace cool.
    9. Connect pressure gage and vacuum gage in correct ports according to manufacturer’s specifications.
    10. Turn on fuel and start furnace.
    11. Check vacuum at pump inlet and determine if it is within allowable limits.  (Note:  If excessive vacuum is noted, check fuel line for blockage).
    12. Read and adjust nozzle pressure and adjust pressure according to manufacturer’s specifications.
    13. Test shut-off valve:
    14. Stop furnace and shut off fuel supply.
    15. Disconnect nozzle line and relocate pressure gage to nozzle port.  (Note:  Insert plug in gage port).
    16. Start pump until pressure gage reaches nozzle pressure.
    17. Stop pump and note pressure drop on gage and compare to manufacturer’s specifications.  (Note:  Gage will drop approximately 15 psi under normal conditions if shut-off valve is operating correctly).
    18. Remove gages, reconnect nozzle line and install plugs.
    19. If fuel system does not operate correctly, make necessary repairs and repeat adjustment procedures (above).
    20. Clean up spilled oil.
    21. Place system in required operating status.
    22. Remove safety and protective equipment and apparel.
    23. Gather tools, equipment and leftover materials, and leave work site clean.