Podcast
Questions and Answers
What is the purpose of the post-purge in the shutdown sequence described in the text?
What is the purpose of the post-purge in the shutdown sequence described in the text?
- To ignite the flame
- To de-energize the SSOVs
- To cool down the system after shutdown
- To ensure complete combustion and clear out any remaining combustible gases (correct)
In the shutdown sequence described, what does the programming controller do if the SSOV proof-of-closure switches do not close within 5 seconds during standby?
In the shutdown sequence described, what does the programming controller do if the SSOV proof-of-closure switches do not close within 5 seconds during standby?
- Shuts down the burner immediately
- Ignites the flame again
- Continues with the post-purge
- Remains in standby until the condition is corrected (correct)
What initiates the shutdown sequence for the burner as per the text?
What initiates the shutdown sequence for the burner as per the text?
- Flame extinguishing
- Call for heat
- Permissive or a burner safety switch (correct)
- Manual on-off switch
During the shutdown sequence, what action causes the flame to be extinguished?
During the shutdown sequence, what action causes the flame to be extinguished?
What happens if there is a call for heat during the shutdown sequence?
What happens if there is a call for heat during the shutdown sequence?
What component in the shutdown sequence allows 5 seconds for proof-of-closure switches to close?
What component in the shutdown sequence allows 5 seconds for proof-of-closure switches to close?
If the steam pressure rises above the set point of the operating control, what occurs next in the shutdown sequence?
If the steam pressure rises above the set point of the operating control, what occurs next in the shutdown sequence?
What action signifies that all permissives and pre-ignition interlocks are satisfied in the startup sequence?
What action signifies that all permissives and pre-ignition interlocks are satisfied in the startup sequence?
'Shutdown Sequence' mentioned in the text is initiated when:
'Shutdown Sequence' mentioned in the text is initiated when:
In case of an error where 'proof-of-closure switches' do not close, what will happen to the 'programming controller'?
In case of an error where 'proof-of-closure switches' do not close, what will happen to the 'programming controller'?
