AC question

[regan j]

1987 K 10 converted to 134. on the accumulator it has an adjustable set screw to determine when the compressor cuts off. I wish to make the compressor stay on longer that what is doing now. Do I turn it in clockwise or counter clockwise to achieve my goal? All pressures are good with no leaks for the past 2 years, it blows cool but not cool enough and I prefer to not guess at which way to turn. Thanks