Gas System - roundhouse WILLIAM Owner's Handbook Manual

proximity, a range of crystals are available for different frequencies, which
can be purchased from any good model shop. Crystals operate in pairs, one in
the transmitter and one in the receiver. They are clearly marked with the
frequency and either TX or RX. When fitting, ensure that the one marked TX
is fitted to the transmitter and RX to the receiver. Two radio systems are
currently in use, 40MHz FM and 75MHz FM. ROUNDHOUSE now only use
75MHz FM sets for USA and CANADA. Ensure that the replacement crystals
are of the correct type.
It is common practice with radio controlled sets to attach a white marker or
label to the aerial with the frequency or band number clearly marked in black.
For further details of the r/c equipment, refer to the manufacturers literature
supplied.

GAS SYSTEM

William 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 smokebox 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 jet block using a 2BA spanner.
Note when connecting or disconnecting the gas pipe and jet block, 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.
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