Gentec 140T with 141C Safety, Set-Up, And Operating Instructions page 11

11. Neutral flame adjusting
a. Refer to cutting tip or welding nozzle chart to determine
the proper regulator pressures.
b. Open oxygen valve on the torch handle (and the preheat
oxygen valve on cutting attachment), adjust the oxygen
regulator to the desired working pressure. Then close
the oxygen valve.
c. Open acetylene valve on the torch handle, adjust the
acetylene regulator to the desired working pressure.
Then close the acetylene valve.
d. Hold torch in one hand and spark lighter in the other. (fig
10)
fig. 10
Lighting Fuel Gas
e. Open acetylene torch valve about 1/4 turn and ignite the
acetylene gas coming out of the tip.
when lighting.
Always point torch away from any person
11