roundhouse TALIESIN, Owner'S Handbook Manual, Page: 18 / 24

GAS SYSTEM
Taliesin locomotives are fitted with our 'FG' type gas burner, which
is set up and fully tested at the factory. This system is designed for
use with Butane or Iso-Butane gas. Mixed gasses, i.e. Butane with
a proportion of Propane mixed in, are available, and may be used if
straight Butane is unavailable. These come in a variety of mixes
ranging from 90/10 to 60/40 with one of the most common being
70/30. The figures refer to the proportions of the mix i.e. 70/30
contains 70% butane and 30% propane.
If using mixed gasses, always choose the one with the largest
proportion of butane. The addition of propane slightly alters the
gasses properties. This can make the burner a little more difficult to
light when cold or after filling the gas tank.
Always open the regulator very slowly when lighting, and only just
sufficient for ignition to take place. Opening too much too soon may
extinguish the flame until the burner reaches normal operating
temperature.
The tiny jet in these units can
become blocked by small particles of
dirt making the burner difficult to light, burn weakly at normal
operating temperatures*, burn in the smoke box or fail completely.
If any of these should happen, clean out the jet as follows.
(* On very cold days, a burner may start off burning weakly due to
the temperature of the gas but should increase to its normal level
as the engine warms up. This is quite normal). Carefully,
disconnect the gas pipe from the gas jet holder using a 2BA
spanner.
Note when connecting or disconnecting the gas pipe and gas jet
holder, do not use excessive force. Always hold the end of the gas
burner near the air holes to support it otherwise it is possible to
cause damage by bending the body. Slacken the screw retaining
the gas jet holder and slide it out to the rear. Remove the jet from
the gas jet holder using a 4BA spanner.
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