Boiler Flame Failure and Testing Procedures
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Questions and Answers

What could happen if the low atomizing medium cut-off switch is defective or improperly adjusted?

  • The flame safeguard control will prevent poor quality oil flames.
  • The burner may not extinguish before flame failure occurs. (correct)
  • The burner will produce high-quality flames consistently.
  • The burner will shut down before flame failure.

    • What is a common reason for flame scanners to fail sooner than their expected lifespan of 40,000 hours?

  • Exposure to high temperature (correct)
  • Incorrect alignment
  • Lack of annual maintenance
  • Inadequate cooling air

    • What should be checked during annual burner maintenance in relation to flame rods?

  • Replacement frequency
  • Proximity to flame
  • Amount of cooling air
  • Warpage and alignment (correct)

    • What can cause ceramic insulators to fail and short out the flame rod?

    <p>Warping</p> Signup and view all the answers

    In the case of repeated flame failures, what could be a potential issue if all normal operating parameters are met?

    <p>Defective programmed combustion control or flame amplifier</p> Signup and view all the answers

    What should be done immediately if an FD fan fails and the combustion air proving switch does not shut down the burner?

    <p>Close the FD fan damper</p> Signup and view all the answers

    Why is it important to thoroughly purge the furnace after repairing an FD fan and ensuring the combustion air proving switch operates correctly?

    <p>To sweep carbon monoxide and unburned fuel</p> Signup and view all the answers

    What action is recommended if there is a failure of the electric motor in an FD fan?

    <p>Replace the forced draft fan</p> Signup and view all the answers

    What is a potential consequence of inadequate atomizing medium pressure for air or steam-atomized burners?

    <p>Poor quality flames</p> Signup and view all the answers

    What is an expected lifespan for UV scanners before they need replacement?

    <p>40 000 hours</p> Signup and view all the answers

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