Flashcards in Installation And Servicing Of LP Steam Systems Deck (9)
Why is end of main vent required on large one pipe systems?
To insure quick venting of air from the horizontal steam main
What are the characteristics of a vacuum type vent?
Non return proportional air venting
Why is a minimum 1/2" annular space required around a stub to a radiator
To allow for movement of the pipe and radiation due to expansion and contraction
How is the air vented from the radiator in a two-pipe pumped condensate return low-pressure steam system
Through the traps
What should be done if the pressure in a steam coil becomes too low to push the condensate back to a return main when using a modulating controller
Install a relief trap
What does the presence of soot in the firebox or in the flues or vents indicate?
Lack of combustion air
What is the first thing to do if no water is visible in a sight glass and the boiler is still firing
Shutoff fuel supply to the boiler
What will the temperature of a mixture of air and steam to be at 10 psig
Lower than the saturation temperature of 100% dry steam