Final answer:
To increase superheat on a thermostatic expansion valve, the adjusting stem should be turned clockwise.
Step-by-step explanation:
To increase superheat on a thermostatic expansion valve, the adjusting stem should be turned clockwise.
A thermostatic expansion valve is used in refrigeration and air conditioning systems to control the amount of refrigerant flow into the evaporator coil. Superheat is the temperature difference between the refrigerant and its saturation temperature at a given pressure. By turning the adjusting stem clockwise, the valve will open up more, allowing more refrigerant to flow into the evaporator coil, thereby increasing the superheat.