Hot Water Heating Boilers: Routine Checks and Safety
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Hot Water Heating Boilers: Routine Checks and Safety

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Questions and Answers

What is the primary reason for the additional importance of regular checks of hot water heating boilers?

  • To monitor the fuel consumption of the boiler
  • To ensure the boiler functions safely and efficiently during unsupervised periods (correct)
  • To inspect the exterior condition of the boiler
  • To adjust the temperature of the hot water in the boiler

    • What are some of the routine boiler checks mentioned in the text?

  • Flame condition, water treatment, and pump efficiency
  • Flame color, stack temperature, and water pressure (correct)
  • Burner symmetrical condition, set point temperature, and make-up water supply
  • Operator intervention, make-up water supply, and pump operation

    • What does it mean for most hot water boilers to be fully automatic?

  • They start when there is a call for heat, maintain hot water at set point, and stop when heating conditions are satisfied without operator intervention (correct)
  • They operate only when supervised by an operator
  • They need a human operator to initiate and shut down the heating process
  • They require constant manual adjustments for temperature control

    • What is the role of the burner programmed combustion control in hot water boilers?

    <p>It sequences the operation of the burner, maintains safe and efficient burner operation, and shuts down the boiler when an unsafe firing condition exists</p> Signup and view all the answers

    What are some of the daily routine procedures for operators to ensure the safe operation of hot water boilers?

    <p>Observing the condition of the burner flame and checking operator intervention</p> Signup and view all the answers

    Why do hot water boilers still need regular attention despite being fully automatic?

    <p>To ensure safe and dependable operation</p> Signup and view all the answers

    What is the significance of a predominantly blue flame when burning natural gas?

    <p>Indicates efficient combustion and proper air-fuel ratio</p> Signup and view all the answers

    What does a bright yellow flame with orange tips indicate when burning light fuel oil?

    <p>Need for adjustment of the air-fuel ratio</p> Signup and view all the answers

    What may cause a high flue gas temperature when the heating surfaces are clean?

    <p>Too much excess air</p> Signup and view all the answers

    What does a gradual increase in stack temperature indicate?

    <p>Fouling of heating surfaces and decreasing heat transfer efficiency</p> Signup and view all the answers

    What may occur if a boiler is over-fired?

    <p>Potential furnace explosion</p> Signup and view all the answers

    Why must the hot water set point in non-condensing boilers not be below 75°C?

    <p>To avoid chimney and vent connector corrosion</p> Signup and view all the answers

    What may prevent costly structural damage in a hot water heating system?

    <p>Installing a water meter in the make-up line</p> Signup and view all the answers

    What can happen if an expansion tank is full in a hot water heating system?

    <p>The safety valve opens and discharge water</p> Signup and view all the answers

    What should be done if the tank pressure does not increase when adding air to a bladder-style expansion tank?

    <p>Check if the tank bladder is damaged</p> Signup and view all the answers

    What can cause conventional air cushion expansion tanks to fill with water?

    <p>Old, brittle, and cracked gauge glass gaskets</p> Signup and view all the answers

    What is required for hot water heating systems that have had major leaks or equipment replacement?

    <p>Additional treatment chemical</p> Signup and view all the answers

    When are blowoff valves usually opened in hot water heating boilers?

    <p>To drain boilers that require structural repair or waterside inspection</p> Signup and view all the answers

    What do blowdown valves help test regularly in hot water heating boilers?

    <p>Low water cut-offs</p> Signup and view all the answers

    What helps reduce the need for internal water treatment in hot water heating boilers?

    <p>Restricting blowoff and blowdown</p> Signup and view all the answers

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