Lighting The Burner - roundhouse WILLIAM Owner's Handbook Manual

4) LIGHTING THE BURNER

WARNING: Before lighting read the section on gas system troubleshooting
(page 13) and be aware of potential problems. If the gas system is not
operating correctly, shut it off immediately or damage may result.
Move the locomotive to another location before lighting. Butane is heavier
than air and small pockets of gas can collect around the locomotive during
filling.
To light the burner, hold a lighted match or cigarette lighter over the top of the
chimney and slowly open the gas regulator by turning it anti-clockwise. The
gas should ignite almost immediately with a pop as the flame travels down the
chimney and into the boiler tube. The burner should be audible but not too
loud.
NOTE as stated above, the gas regulator should be opened slowly until the
burner ignites. If opened too quickly, particularly when the engine is cold or if
the gas tank has just been filled, it is possible that the flame may not travel
back into the boiler flue but stay in the smokebox. If this should happen, the
burner will sound quite different to normal and the blue flame will be visible
in the smokebox if viewed down the chimney from a safe height. Should this
happen, turn off the gas immediately or damage may result and then re-light
it. If the problem persists and it is not possible to ignite the burner correctly,
then a dirty jet should be suspected and cleaned as detailed on page 13.
For the first couple of minutes keep the burner on low. This is important, as
until it warms up, the flame will be a little unstable and turning it up too much
could cause it to go out. Also, with a completely full tank, liquid gas could be
drawn off instead of vaporized gas, which can also extinguish the flame.
After a couple of minutes, the gas control valve can be opened more to speed
up steam raising. Open the gas regulator slowly to about one full turn.
The full range of adjustment (closed to fully open) is achieved within the
first full rotation of the gas regulator knob any more is unnecessary. It
should not be opened more than this, as it is possible to unscrew the spindle
completely and release gas into the cab, which is potentially dangerous.
To achieve a more accurate setting of the gas flow, it helps to pull very gently
on the regulator knob, adjust the gas flow, and then release the regulator.
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