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EASY What is the purpose of maintaining an air cushion in the expansion tank?

  • To reduce noise and vibration in the system
  • To increase the pressure in the system
  • To accommodate the expanded water during warmup (correct)
  • To prevent the tank from rusting

    • When should the stop valve on the boiler outlet be opened?

  • When the system is at a high temperature
  • When the boiler is fully fired
  • When the boiler water reaches the temperature of the supply main (correct)
  • When the return line is fully open

    • What is the recommended procedure when warming up a cold boiler?

  • Crack open the outlet valve, then slowly open the inlet valve (correct)
  • Open the outlet valve fully, then crack open the inlet valve
  • Open both valves simultaneously
  • Fully open the inlet valve, then slowly open the outlet valve

    • What should be done after warming up the boiler?

    <p>Switch to low fire until sufficiently warmed up</p> Signup and view all the answers

    What is the requirement for using the alternative method of warming up a cold boiler?

    <p>The on-line boilers have sufficient capacity to heat the extra boiler</p> Signup and view all the answers

    Why is it important to plan ahead for heating loads?

    <p>To have standby boilers warmed up prior to being required</p> Signup and view all the answers

    What is the primary objective of the Power Engineer during the startup of a hot water boiler?

    <p>To monitor all aspects of startup</p> Signup and view all the answers

    What should be done before starting the boiler?

    <p>Prepare the boiler plant auxiliaries according to site-specific procedures</p> Signup and view all the answers

    Why is it necessary to wait for at least 5 minutes after shutting the pilot and main gas valves?

    <p>To allow the furnace to purge naturally</p> Signup and view all the answers

    What is the purpose of the draft fan in some boilers?

    <p>To provide a mechanical purge</p> Signup and view all the answers

    What is the recommended reference for heating boiler operating practices?

    <p>ASME VI Recommended Rules for the Care and Operation of Heating Boilers</p> Signup and view all the answers

    What should be done to the boiler control switch before starting the boiler?

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

    What is the purpose of closing the main disconnect switch?

    <p>To supply power to the boiler</p> Signup and view all the answers

    What should be done if the boiler is equipped with a high-low firing rate control?

    <p>Place the boiler on low fire</p> Signup and view all the answers

    What should be done with the firing rate control when starting the boiler?

    <p>Place the control in manual low fire</p> Signup and view all the answers

    What happens after the air damper goes to the low fire position in the ignition sequence?

    <p>The electrodes in the igniter spark</p> Signup and view all the answers

    Why should the water temperature be raised slowly when starting the boiler?

    <p>To avoid overheating the boiler</p> Signup and view all the answers

    What should be performed while the boiler is warming up?

    <p>Both operating and safety limit checks</p> Signup and view all the answers

    What should be checked after the burner shuts down?

    <p>Both the water pressure on the tridicator gauge and the water level in the expansion tank</p> Signup and view all the answers

    What is the purpose of the try lever and pop tests on the safety relief valve?

    <p>To check for evidence of leaking</p> Signup and view all the answers

    What is the term used to describe adding a previously non-operating boiler to a system that is already in operation?

    <p>Cutting in</p> Signup and view all the answers

    What should be done with the valve in the connecting line between the boiler and the expansion tank when cutting in a boiler?

    <p>Crack open the valve</p> Signup and view all the answers

    Why should the stop valves in the supply and return lines to the boiler be closed during warmup when cutting in a boiler?

    <p>To allow the boiler to warm up slowly</p> Signup and view all the answers

    MEDIUM What should be entered in the log book after starting the boiler?

    <p>The date and time of startup, observed irregularities and corrective actions taken, and other relevant information</p> Signup and view all the answers

    What should be performed before starting a hot water boiler?

    <p>Preparing the boiler plant auxiliaries according to site-specific procedures</p> Signup and view all the answers

    Why is it necessary to wait for at least 5 minutes after shutting the pilot and main gas valves?

    <p>To allow the furnace to purge naturally</p> Signup and view all the answers

    What should be done if the boiler is equipped with a high-low firing rate control?

    <p>Place the boiler on low fire</p> Signup and view all the answers

    What should be reviewed before starting a hot water boiler?

    <p>The manufacturer recommendations for burner and boiler startup</p> Signup and view all the answers

    What is the purpose of closing the main disconnect switch?

    <p>To supply power to the boiler</p> Signup and view all the answers

    What should be done after shutting the pilot and main gas valves?

    <p>Wait for at least 5 minutes to allow the furnace to purge naturally</p> Signup and view all the answers

    What should be done with the boiler control switch before starting the boiler?

    <p>Place it in the 'off' position</p> Signup and view all the answers

    Why should the site-specific standard operating procedures be followed?

    <p>Because they are site-specific and necessary for safe boiler operation</p> Signup and view all the answers

    What should be done first when starting a boiler?

    <p>Turn the boiler control switch to the 'on' or 'start' position</p> Signup and view all the answers

    What happens after the pilot ignition trial is over?

    <p>The main burner safety shut-off valves open</p> Signup and view all the answers

    Why is it important to raise the water temperature slowly?

    <p>To prevent leaks in the system</p> Signup and view all the answers

    What should be checked frequently while the boiler is warming up?

    <p>The burner for leaks</p> Signup and view all the answers

    What should be done with the valve in the connecting line between the boiler and the expansion tank when cutting in a boiler?

    <p>Crack it open and let the pressure equalize</p> Signup and view all the answers

    What should be done with the firing rate control if the boiler is equipped with a fully modulating firing rate control?

    <p>Place it in auto</p> Signup and view all the answers

    What should be done before increasing the fuel input?

    <p>Warming up the boiler and the heating system to normal operating temperature and pressure</p> Signup and view all the answers

    What should be performed while the boiler is warming up?

    <p>Operating and safety limit checks</p> Signup and view all the answers

    What should be entered in the log book after starting the boiler?

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

    What is the term used to describe adding a previously non-operating boiler to a system that is already in operation?

    <p>Cutting in</p> Signup and view all the answers

    Why is it essential to have sufficient space in the expansion tank?

    <p>To accommodate the expanded water produced during warmup.</p> Signup and view all the answers

    What should be done when the boiler water reaches the temperature of the water in the supply main?

    <p>Open the stop valve on the boiler outlet slightly.</p> Signup and view all the answers

    What is the alternative method of warming up a cold boiler?

    <p>Crack open the outlet valve, then slowly open the inlet valve.</p> Signup and view all the answers

    What should be done with the boiler after it has been warmed up?

    <p>Switch to 'low fire' or 'automatic' as applicable.</p> Signup and view all the answers

    What is the importance of planning ahead for heating loads?

    <p>To ensure that standby boilers are warmed up prior to being required.</p> Signup and view all the answers

    What is the requirement for using the alternative method of warming up a cold boiler?

    <p>The on-line boilers must have sufficient capacity to heat the extra boiler.</p> Signup and view all the answers

    What is the primary concern when warming up a cold boiler using the alternative method?

    <p>Establishing flow through the boiler without causing shock to the system</p> Signup and view all the answers

    What is the purpose of opening the stop valve on the boiler outlet slightly when the boiler water reaches system temperature?

    <p>To establish flow through the boiler and prevent shock to the system</p> Signup and view all the answers

    Why is it necessary to have standby boilers warmed up prior to being required?

    <p>To plan ahead for heating loads and ensure sufficient capacity</p> Signup and view all the answers

    What is the primary benefit of maintaining an air cushion in the expansion tank?

    <p>To accommodate the expanded water produced during warmup</p> Signup and view all the answers

    What is the recommended procedure when the boiler reaches system temperature using the alternative method?

    <p>Opening the valve in the return line slowly</p> Signup and view all the answers

    What is the primary consideration when using the alternative method of warming up a cold boiler?

    <p>Establishing flow through the boiler without causing shock to the system</p> Signup and view all the answers

    What is the primary purpose of the 5-minute waiting period after shutting the pilot and main gas valves?

    <p>To allow the furnace to purge naturally</p> Signup and view all the answers

    Why is it essential to follow the manufacturer's recommendations for burner and boiler startup?

    <p>To ensure a safe and proper startup</p> Signup and view all the answers

    What should be done with the boiler control switch before starting the boiler?

    <p>It should be in the 'off' position</p> Signup and view all the answers

    Why is it necessary to review the site-specific standard operating procedures before starting a hot water boiler?

    <p>To ensure a safe and efficient startup</p> Signup and view all the answers

    What should be done with the main disconnect switch before starting the boiler?

    <p>It should be closed to supply power to the boiler</p> Signup and view all the answers

    What is the primary purpose of the expansion tank in a hot water boiler system?

    <p>To provide a buffer for sudden changes in pressure</p> Signup and view all the answers

    Why is it necessary to open the boiler return and supply valves before starting the boiler?

    <p>To allow for the circulation of treated water</p> Signup and view all the answers

    What should be done with the pilot flame after it has been established?

    <p>It should be used to ignition the main burner</p> Signup and view all the answers

    What is the correct sequence of events in the ignition sequence of a boiler?

    <p>The forced draft fan starts, the air damper fully opens, the boiler purges, the air damper goes to low fire, and the electrodes spark.</p> Signup and view all the answers

    What should be done with the valve in the connecting line between the boiler and the expansion tank when cutting in a boiler?

    <p>The valve should be cracked open and then fully opened once the pressures equalize.</p> Signup and view all the answers

    What should be done with the stop valves in the supply and return lines to the boiler during warmup when cutting in a boiler?

    <p>They should be closed.</p> Signup and view all the answers

    What should be done with the firing rate control if the boiler is equipped with a fully modulating firing rate control?

    <p>It should be placed in auto.</p> Signup and view all the answers

    What should be performed while the boiler is warming up?

    <p>The operating and safety limit checks should be performed.</p> Signup and view all the answers

    What should be done after the burner shuts down?

    <p>The water pressure should be checked on the tridicator gauge.</p> Signup and view all the answers

    What should be entered in the log book after starting the boiler?

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

    What is the purpose of raising the water temperature slowly when starting the boiler?

    <p>To prevent thermal shock to the boiler.</p> Signup and view all the answers

    What should be checked frequently while the boiler is warming up?

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

    What is the purpose of the try lever and pop tests on the safety relief valve?

    <p>To ensure the valve is functioning properly.</p> Signup and view all the answers

    Study Notes

    Startup Preparation

    • Prepare boiler plant auxiliaries according to site-specific procedures.
    • Review manufacturer recommendations for burner and boiler startup.

    Boiler Startup Sequence

    • Open boiler return and supply valves, if applicable.
    • Ensure boiler control switch is in the “off” position.
    • Close main disconnect switch to supply power to the boiler.

    Furnace Purge and Ignition

    • If the boiler has a gas-fired atmospheric burner, allow 5 minutes for natural purge.
    • Light the continuous pilot burner according to manufacturer's instructions.
    • Open main burner test firing valve.

    Main Burner Ignition

    • Place boiler on low fire if equipped with high-low firing rate control or manual low fire if equipped with fully modulating firing rate control.
    • Turn boiler control switch to the “on” or “start” position.
    • Ignition sequence: forced draft fan starts, air damper opens, boiler purges, air damper goes to low fire, electrodes spark, pilot fuel admitted, and main burner ignites.

    Warming Up the Boiler

    • Raise water temperature slowly, operating the boiler at low fire, until the boiler and heating system reach normal operating temperature and pressure.
    • Perform operating and safety limit checks.

    Safety Checks

    • Check the boiler frequently for leaks and ensure the burner is operating properly.
    • Check the safety relief valve for evidence of leaking and perform try lever and pop tests.

    Log Book Entry

    • Record date and time of startup, observed irregularities, corrective actions taken, time when controls shut off burner, tests performed, and results of tests.
    • Include signature of operator.

    Cutting in a Boiler

    • When adding a previously non-operating boiler to an already operating system, follow the same startup procedures, with exceptions:
      • Close the valve in the connecting line between the boiler and the common expansion tank.
      • Fill the boiler and raise pressure to at least the minimum required static pressure.
      • Crack open the valve and let the pressure equalize, then open the valve fully.

    Startup Preparation

    • Prepare boiler plant auxiliaries according to site-specific procedures.
    • Review manufacturer recommendations for burner and boiler startup.

    Boiler Startup Sequence

    • Open boiler return and supply valves, if applicable.
    • Ensure boiler control switch is in the “off” position.
    • Close main disconnect switch to supply power to the boiler.

    Furnace Purge and Ignition

    • If the boiler has a gas-fired atmospheric burner, allow 5 minutes for natural purge.
    • Light the continuous pilot burner according to manufacturer's instructions.
    • Open main burner test firing valve.

    Main Burner Ignition

    • Place boiler on low fire if equipped with high-low firing rate control or manual low fire if equipped with fully modulating firing rate control.
    • Turn boiler control switch to the “on” or “start” position.
    • Ignition sequence: forced draft fan starts, air damper opens, boiler purges, air damper goes to low fire, electrodes spark, pilot fuel admitted, and main burner ignites.

    Warming Up the Boiler

    • Raise water temperature slowly, operating the boiler at low fire, until the boiler and heating system reach normal operating temperature and pressure.
    • Perform operating and safety limit checks.

    Safety Checks

    • Check the boiler frequently for leaks and ensure the burner is operating properly.
    • Check the safety relief valve for evidence of leaking and perform try lever and pop tests.

    Log Book Entry

    • Record date and time of startup, observed irregularities, corrective actions taken, time when controls shut off burner, tests performed, and results of tests.
    • Include signature of operator.

    Cutting in a Boiler

    • When adding a previously non-operating boiler to an already operating system, follow the same startup procedures, with exceptions:
      • Close the valve in the connecting line between the boiler and the common expansion tank.
      • Fill the boiler and raise pressure to at least the minimum required static pressure.
      • Crack open the valve and let the pressure equalize, then open the valve fully.

    Startup Preparation

    • Prepare boiler plant auxiliaries according to site-specific procedures.
    • Review manufacturer recommendations for burner and boiler startup.

    Boiler Startup Sequence

    • Open boiler return and supply valves, if applicable.
    • Ensure boiler control switch is in the “off” position.
    • Close main disconnect switch to supply power to the boiler.

    Furnace Purge and Ignition

    • If the boiler has a gas-fired atmospheric burner, allow 5 minutes for natural purge.
    • Light the continuous pilot burner according to manufacturer's instructions.
    • Open main burner test firing valve.

    Main Burner Ignition

    • Place boiler on low fire if equipped with high-low firing rate control or manual low fire if equipped with fully modulating firing rate control.
    • Turn boiler control switch to the “on” or “start” position.
    • Ignition sequence: forced draft fan starts, air damper opens, boiler purges, air damper goes to low fire, electrodes spark, pilot fuel admitted, and main burner ignites.

    Warming Up the Boiler

    • Raise water temperature slowly, operating the boiler at low fire, until the boiler and heating system reach normal operating temperature and pressure.
    • Perform operating and safety limit checks.

    Safety Checks

    • Check the boiler frequently for leaks and ensure the burner is operating properly.
    • Check the safety relief valve for evidence of leaking and perform try lever and pop tests.

    Log Book Entry

    • Record date and time of startup, observed irregularities, corrective actions taken, time when controls shut off burner, tests performed, and results of tests.
    • Include signature of operator.

    Cutting in a Boiler

    • When adding a previously non-operating boiler to an already operating system, follow the same startup procedures, with exceptions:
      • Close the valve in the connecting line between the boiler and the common expansion tank.
      • Fill the boiler and raise pressure to at least the minimum required static pressure.
      • Crack open the valve and let the pressure equalize, then open the valve fully.

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    Description

    Learn the essential steps for safely starting a hot water boiler, including furnace purge, ignition, and main burner light-off. Understand the importance of following manufacturer operating procedures and site-specific standard operating procedures.

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