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Boiler Modulation System Operation Quiz

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Questions and Answers

What is the purpose of the Damper Positioning Switch (Hi-Low-Auto) on the heating boilers?

To energize oil nozzles regardless of the load on the boiler

To monitor the steam pressure in the boiler

To manually start and stop the boiler

To adjust the air damper and firing rate control valve according to the load on the boiler (correct)

What is the function of the Burner On-Off switch on the heating boilers?

To adjust the firing rate control valve according to the load on the boiler

To regulate the temperature in the boiler

To start and stop the boiler manually (correct)

To energize oil nozzles based on the load on the boiler

In what position does the modulating motor remain when the Damper Positioning Switch is set to LO?

Off position

Low-fire position (correct)

High-fire position

Automatic position

What determines the load on the boiler for hot water boilers?

The modulating temperature control Signup and view all the answers

What type of control does a packaged dual-fuel boiler have when firing on oil?

Multi-position control Signup and view all the answers

What happens to the air damper and firing rate valve when firing on gas?

They remain in high-fire regardless of boiler load Signup and view all the answers

What happens when the damper positioning switch is set to HI?

The modulating motor drives to high-fire Signup and view all the answers

What happens when the manual-automatic switch is set to MANUAL and the damper positioning switch is set to AUTO?

Manual flame control potentiometer controls the firing rate of the boiler Signup and view all the answers

What happens when firing on oil and a switch in the modulating motor permits only one oil nozzle to fire?

Boiler remains on low-fire regardless of the set point of the pressuretrol Signup and view all the answers

What determines the position of the modulating motor when the damper positioning switch is set to AUTO?

The pressuretrol set point Signup and view all the answers