4BE3.5 U4 C5 Obj 1 EMH
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EASY What should be done before opening the boiler waterside for maintenance or inspection?

  • Open the fireside access
  • Turn off the circulator pump
  • Close the valve in the line that connects the boiler with the expansion tank (correct)
  • Drain the boiler

    • Why is it beneficial to keep the heating system and boilers full of chemically treated water during layup?

  • To minimize chemical use (correct)
  • To introduce impurities to the heating system
  • To reduce make-up water usage
  • To increase corrosion during the layup period

    • What should be done to the boiler after it has been removed from service?

  • Drain the boiler immediately
  • Let the boiler cool down slowly (correct)
  • Re-start the circulator pump
  • Open the fireside access

    • What is the purpose of washing the boiler with a stream of high-pressure cold water?

    <p>To remove scale and sediment</p> Signup and view all the answers

    Why is it important to perform accurate water testing and add chemicals prior to shutting off the boiler?

    <p>To prevent corrosion during layup</p> Signup and view all the answers

    What should be done with the draft fan damper if the fireside is re-closed after cleaning?

    <p>Shut it</p> Signup and view all the answers

    What is the purpose of applying oil to the fireside surfaces?

    <p>To protect the surfaces from corrosion</p> Signup and view all the answers

    What should be done to the stop valves in the boiler supply and return lines when shutting down the heating system?

    <p>Close them</p> Signup and view all the answers

    What is the first step in taking a hot water boiler out of service?

    <p>Open the blowoff or drain valve on the bottom of the boiler</p> Signup and view all the answers

    Why is it necessary to check the automatic make-up water system?

    <p>To feed the amount of water blown off during the previous step</p> Signup and view all the answers

    What should be done if the flame is irregular?

    <p>Employ a certified burner service technician to adjust the burner</p> Signup and view all the answers

    What is the purpose of testing the operating and limit controls?

    <p>To identify any issues with the controls</p> Signup and view all the answers

    What is the purpose of the try lever test on the safety relief valve?

    <p>To identify any issues with the safety relief valve</p> Signup and view all the answers

    What should be done to the water chemistry?

    <p>Test the water chemistry and add chemicals as necessary</p> Signup and view all the answers

    What should be done to the boiler control switch?

    <p>Turn it to 'off'</p> Signup and view all the answers

    What is the final step in taking a hot water boiler out of service?

    <p>All of the above</p> Signup and view all the answers

    MEDIUM What is the primary purpose of assessing the boiler's overall status and condition before shutting it down?

    <p>To identify necessary repairs during the downtime</p> Signup and view all the answers

    Why is it necessary to check the flame for irregularity before shutting down the boiler?

    <p>To identify potential burner issues</p> Signup and view all the answers

    What is the purpose of testing the operating and limit controls during the shutdown procedure?

    <p>To identify any malfunctioning controls</p> Signup and view all the answers

    What should be done to the boiler control switch after reducing the firing rate of the boiler?

    <p>Turn it to off</p> Signup and view all the answers

    Why is it important to test the water chemistry before shutting down the boiler?

    <p>To protect the boiler and heating system from corrosion</p> Signup and view all the answers

    What should be done to the main and pilot manual fuel valves after shutting down the boiler?

    <p>Shut, lock, and tag them</p> Signup and view all the answers

    What is the purpose of the try lever test on the safety relief valve?

    <p>To test the boiler's pressure relief system</p> Signup and view all the answers

    Why is it necessary to place the burner firing rate control to manual before shutting down the boiler?

    <p>To allow for manual control of the boiler's firing rate</p> Signup and view all the answers

    Why is it crucial to perform accurate water testing and add chemicals prior to shutting off the boiler?

    <p>To minimize corrosion during the layup period</p> Signup and view all the answers

    What is the benefit of keeping the heating system and boilers full of chemically treated water during a summer layup?

    <p>To minimize chemical use and prevent corrosion</p> Signup and view all the answers

    What should be done to the circulator pump when taking the heating system out of service?

    <p>Turn it off and lock its breaker open</p> Signup and view all the answers

    What should be done with the manhole covers, handhole covers, and drain plugs after draining the boiler?

    <p>Remove them</p> Signup and view all the answers

    What should be done to the fireside access during the summer months?

    <p>Leave it open</p> Signup and view all the answers

    Why is it necessary to tag the stop valves in the boiler supply and return lines?

    <p>To indicate that they are locked</p> Signup and view all the answers

    What should be done to the boiler after it has cooled down slowly?

    <p>Record the results of all limit tests in the log book</p> Signup and view all the answers

    Why is it beneficial to apply oil to the fireside surfaces?

    <p>To prevent corrosion during the layup period</p> Signup and view all the answers

    HARD What should be done to the boiler's stop valves in the supply and return lines when taking it out of service?

    <p>Close them and lock them</p> Signup and view all the answers

    Why is it crucial to perform accurate water testing and add chemicals prior to shutting off the boiler?

    <p>To prevent corrosion during layup</p> Signup and view all the answers

    What should be done to the circulator pump when taking the heating system out of service?

    <p>Turn it off and lock its breaker open</p> Signup and view all the answers

    Why is it beneficial to keep the heating system and boilers full of chemically treated water during a summer layup?

    <p>To prevent corrosion and introduce few impurities</p> Signup and view all the answers

    What should be done to the fireside access during the summer months?

    <p>Leave it open</p> Signup and view all the answers

    What should be done after the boiler has completely cooled down?

    <p>Wash the boiler out with a stream of high-pressure cold water</p> Signup and view all the answers

    Why is it necessary to tag the stop valves in the boiler supply and return lines?

    <p>To indicate that they are closed</p> Signup and view all the answers

    What should be done to the boiler log book after the boiler has gone off-line?

    <p>Record the results of all limit tests and the time the boiler went off-line</p> Signup and view all the answers

    What is the primary reason for opening the blowoff or drain valve on the bottom of the boiler before shutting it down?

    <p>To remove sediment that may have collected</p> Signup and view all the answers

    What is the purpose of checking the automatic make-up water system during the shutdown procedure?

    <p>To feed the amount of water blown off during the previous step</p> Signup and view all the answers

    What is the correct sequence of events after placing the burner firing rate control to manual?

    <p>Reduce the firing rate, then turn the boiler control switch to 'off'</p> Signup and view all the answers

    What is the purpose of testing the high and low gas pressure cut-offs during the shutdown procedure?

    <p>To prevent damage to the boiler and its appurtenances</p> Signup and view all the answers

    What should be done to the boiler draft fan circuit breaker after shutting down the boiler?

    <p>It should be opened, locked, and tagged</p> Signup and view all the answers

    Why is it necessary to test the combustion air proving switch during the shutdown procedure?

    <p>To ensure the safety of the boiler and its operators</p> Signup and view all the answers

    What should be done to the water chemistry after testing it during the shutdown procedure?

    <p>Add chemicals, if necessary, to maintain the correct concentration</p> Signup and view all the answers

    What is the purpose of checking the flame for irregularity during the shutdown procedure?

    <p>To employ a certified burner service technician to adjust the burner</p> Signup and view all the answers

    Study Notes

    Preparing a Hot Water Boiler for Shutdown

    • Assess the boiler's condition and controls before shutting down to identify required repairs
    • Open the blowoff or drain valve to remove sediment and close when the water runs clear
    • Ensure the automatic make-up water system replaces the amount of water blown off

    Checking Boiler Controls and Safety Features

    • Test operating and limit controls, including:
      • Low water cut-off
      • High temperature cut-off
      • High and low gas pressure cut-offs
      • Flame scanner/flame failure detection devices
      • Combustion air proving switch
      • Manufacturer-specified controls
    • Perform a try lever test on the safety relief valve
    • Test the water chemistry and add chemicals as necessary to maintain correct concentration

    Shutting Down the Boiler

    • Place the burner firing rate control to manual and slowly reduce the firing rate
    • Turn the boiler control switch to "off" when at minimum fire
    • Shut, lock, and tag the main and pilot manual fuel valves
    • Open, lock, and tag the boiler control circuit breaker and boiler draft fan circuit breaker

    Final Steps

    • Turn off the circulator pump, lock its breaker open, and tag it (if heating system is being taken out of service)
    • Close and lock the stop valves in the boiler supply and return lines
    • Let the boiler cool down slowly
    • Record the results of all limit tests and the time the boiler went off-line in the log book

    Maintenance and Inspection

    • Open the fireside access and inspect the burner and refractory according to manufacturer guidelines
    • Close the valve in the line connecting the boiler to the expansion tank (if shared with other boilers)
    • Drain the boiler and wash it out with a stream of high-pressure cold water after cooling down
    • Inspect and clean the fireside, applying oil to protect surfaces (optional)
    • Re-close the fireside and ensure the draft fan damper is shut to prevent humid air from passing through the furnace

    Preparing a Hot Water Boiler for Shutdown

    • Assess the boiler's condition and controls before shutting down to identify required repairs
    • Open the blowoff or drain valve to remove sediment and close when the water runs clear
    • Ensure the automatic make-up water system replaces the amount of water blown off

    Checking Boiler Controls and Safety Features

    • Test operating and limit controls, including:
      • Low water cut-off
      • High temperature cut-off
      • High and low gas pressure cut-offs
      • Flame scanner/flame failure detection devices
      • Combustion air proving switch
      • Manufacturer-specified controls
    • Perform a try lever test on the safety relief valve
    • Test the water chemistry and add chemicals as necessary to maintain correct concentration

    Shutting Down the Boiler

    • Place the burner firing rate control to manual and slowly reduce the firing rate
    • Turn the boiler control switch to "off" when at minimum fire
    • Shut, lock, and tag the main and pilot manual fuel valves
    • Open, lock, and tag the boiler control circuit breaker and boiler draft fan circuit breaker

    Final Steps

    • Turn off the circulator pump, lock its breaker open, and tag it (if heating system is being taken out of service)
    • Close and lock the stop valves in the boiler supply and return lines
    • Let the boiler cool down slowly
    • Record the results of all limit tests and the time the boiler went off-line in the log book

    Maintenance and Inspection

    • Open the fireside access and inspect the burner and refractory according to manufacturer guidelines
    • Close the valve in the line connecting the boiler to the expansion tank (if shared with other boilers)
    • Drain the boiler and wash it out with a stream of high-pressure cold water after cooling down
    • Inspect and clean the fireside, applying oil to protect surfaces (optional)
    • Re-close the fireside and ensure the draft fan damper is shut to prevent humid air from passing through the furnace

    Preparing a Hot Water Boiler for Shutdown

    • Assess the boiler's condition and controls before shutting down to identify required repairs
    • Open the blowoff or drain valve to remove sediment and close when the water runs clear
    • Ensure the automatic make-up water system replaces the amount of water blown off

    Checking Boiler Controls and Safety Features

    • Test operating and limit controls, including:
      • Low water cut-off
      • High temperature cut-off
      • High and low gas pressure cut-offs
      • Flame scanner/flame failure detection devices
      • Combustion air proving switch
      • Manufacturer-specified controls
    • Perform a try lever test on the safety relief valve
    • Test the water chemistry and add chemicals as necessary to maintain correct concentration

    Shutting Down the Boiler

    • Place the burner firing rate control to manual and slowly reduce the firing rate
    • Turn the boiler control switch to "off" when at minimum fire
    • Shut, lock, and tag the main and pilot manual fuel valves
    • Open, lock, and tag the boiler control circuit breaker and boiler draft fan circuit breaker

    Final Steps

    • Turn off the circulator pump, lock its breaker open, and tag it (if heating system is being taken out of service)
    • Close and lock the stop valves in the boiler supply and return lines
    • Let the boiler cool down slowly
    • Record the results of all limit tests and the time the boiler went off-line in the log book

    Maintenance and Inspection

    • Open the fireside access and inspect the burner and refractory according to manufacturer guidelines
    • Close the valve in the line connecting the boiler to the expansion tank (if shared with other boilers)
    • Drain the boiler and wash it out with a stream of high-pressure cold water after cooling down
    • Inspect and clean the fireside, applying oil to protect surfaces (optional)
    • Re-close the fireside and ensure the draft fan damper is shut to prevent humid air from passing through the furnace

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    Description

    This quiz covers the essential steps to safely shut down a hot water boiler, including assessing its condition, draining sediment, and checking controls and safety features.

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