20 Questions
What is the primary reason for the additional importance of regular checks of hot water heating boilers?
To ensure the boiler functions safely and efficiently during unsupervised periods
What are some of the routine boiler checks mentioned in the text?
Flame color, stack temperature, and water pressure
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
What is the role of the burner programmed combustion control in hot water boilers?
It sequences the operation of the burner, maintains safe and efficient burner operation, and shuts down the boiler when an unsafe firing condition exists
What are some of the daily routine procedures for operators to ensure the safe operation of hot water boilers?
Observing the condition of the burner flame and checking operator intervention
Why do hot water boilers still need regular attention despite being fully automatic?
To ensure safe and dependable operation
What is the significance of a predominantly blue flame when burning natural gas?
Indicates efficient combustion and proper air-fuel ratio
What does a bright yellow flame with orange tips indicate when burning light fuel oil?
Need for adjustment of the air-fuel ratio
What may cause a high flue gas temperature when the heating surfaces are clean?
Too much excess air
What does a gradual increase in stack temperature indicate?
Fouling of heating surfaces and decreasing heat transfer efficiency
What may occur if a boiler is over-fired?
Potential furnace explosion
Why must the hot water set point in non-condensing boilers not be below 75°C?
To avoid chimney and vent connector corrosion
What may prevent costly structural damage in a hot water heating system?
Installing a water meter in the make-up line
What can happen if an expansion tank is full in a hot water heating system?
The safety valve opens and discharge water
What should be done if the tank pressure does not increase when adding air to a bladder-style expansion tank?
Check if the tank bladder is damaged
What can cause conventional air cushion expansion tanks to fill with water?
Old, brittle, and cracked gauge glass gaskets
What is required for hot water heating systems that have had major leaks or equipment replacement?
Additional treatment chemical
When are blowoff valves usually opened in hot water heating boilers?
To drain boilers that require structural repair or waterside inspection
What do blowdown valves help test regularly in hot water heating boilers?
Low water cut-offs
What helps reduce the need for internal water treatment in hot water heating boilers?
Restricting blowoff and blowdown
Test your knowledge on the regular checks and safety measures for hot water heating boilers. Learn about the importance of routine checks and monitoring key parameters such as pressure, temperature, flame condition, and water treatment.
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