Kohlangaz Gosford Installation And Maintenance Instructions Manual page 17

This should not be overtightened. Move the control lever fully
downwards and check that the left hand micro-switch operates the
igniter and that the control valve spindle is fully depressed. Move the
control lever upwards to the "off" position and check that the control
lever operates smoothly and safely.
NOTE : The cable is factory set, and therefore should need no adjustment
p) Refit the front burner heat shield to the sides of the fire box (2 Screws)
and secure the trim to the fire via the location tabs on the firebox
flange.
q) Before making the final gas connection, thoroughly purge the gas
supply pipework to remove all foreign matter, otherwise serious
damage may be caused to the gas control valve on the fire.
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