15 Questions
What is the importance of having fundamental equipment knowledge before operating a boiler?
To prevent common problems during routine boiler operation
Why is it assumed that the operator is thoroughly familiar with the firing equipment and controls?
To simplify the process of troubleshooting
What is the purpose of following a routine while checking boiler operation?
To identify obvious causes of trouble
Why is a good knowledge of the control system important for troubleshooting?
To simplify the process of pinpointing the source of trouble
What can help prevent costly downtime or delays in boiler operation?
Systematic checks of actual operation against the normal sequence
Where can methods of correcting boiler trouble usually be found?
In the operator's manual for the boiler
What assumption is made about the proper installation and adjustment of the boiler?
That it has been followed by a thorough inspection and testing
What should be checked if the blower starts but stops again after 5-10 seconds?
Low air pressure switch
What could be the possible cause if there is no ignition and spark is present but no flame?
Inoperative solenoid valve
If the boiler pressure or temperature is above the cut-in setting of the operating control, what should be checked?
Limit control circuit completion
What should be done if the burner stays on low-fire?
Check damper linkage
What might be the cause if the shutdown occurs during firing?
Improper air-fuel ratio
What should be checked if the air dampers are not functioning?
Loose linkage or jammed
What could be the reason if there is no main flame despite having an insufficient pilot or low-fire flame?
"Test/run" switch in test position
What could cause draft fan to not start?
Blown fuses, tripped overloads, loose electrical connections
Study Notes
Importance of Fundamental Equipment Knowledge
- Having fundamental equipment knowledge is crucial before operating a boiler to ensure safe and efficient operation.
- Operators are assumed to be thoroughly familiar with firing equipment and controls to prevent accidents and optimize performance.
Routine Boiler Operation Checks
- Following a routine while checking boiler operation helps identify potential issues before they become major problems.
- A routine check ensures that the boiler is operating within safe and efficient parameters.
Control System Knowledge and Troubleshooting
- Good knowledge of the control system is essential for effective troubleshooting to minimize downtime and reduce costs.
- Understanding the control system helps operators quickly identify and rectify issues, preventing costly delays.
Preventing Downtime and Correcting Boiler Trouble
- Regular maintenance and routine checks can help prevent costly downtime or delays in boiler operation.
- Methods of correcting boiler trouble can usually be found in the boiler's manual or troubleshooting guides.
Installation and Adjustment Assumptions
- It is assumed that the boiler has been properly installed and adjusted according to the manufacturer's instructions.
Troubleshooting Common Boiler Issues
- If the blower starts but stops again after 5-10 seconds, the electrical supply or blower motor should be checked.
- If there is no ignition despite the presence of spark, the fuel supply or ignition system should be checked.
- If the boiler pressure or temperature is above the cut-in setting of the operating control, the pressure or temperature sensors should be checked.
- If the burner stays on low-fire, the fuel supply or burner components should be checked.
- If a shutdown occurs during firing, the flame failure devices or safety controls should be checked.
- If the air dampers are not functioning, the damper motors or linkages should be checked.
- If there is no main flame despite having an insufficient pilot or low-fire flame, the fuel supply or ignition system should be checked.
- If the draft fan does not start, the electrical supply or fan motor should be checked.
Test your knowledge of troubleshooting common problems during the operation of steam or hot water boilers. This quiz covers general guidelines for finding the cause of trouble during startup and operation of automatically fired boilers.
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