Samsung NX58K7850S Serie Manuel D'installation page 26

Installation instructions
To adjust flame low setting
Identify which burner is exhibiting too high or too low of simmer rate via manifold
panel graphics.
Simmer Set Screw
26 English
1. Rotate a knob to "LO" position and
remove the knob from the valve shaft
while the flame is lit.
2. Carefully push the screw driver into
the C chanel of the valve, until it hits
the simmer set screw. Make sure the
screwdriver flathead is seated into the
set screw groove.
3. Rotate valve set screw clockwise to
decrease "LO" setting flame output, or
rotate set screw counter clockwise to
increase "LO" setting flame output.