Final answer:
To increase superheat in a TXV system, the adjustment spring should be turned clockwise, which results in higher superheat before the valve opens, allowing the refrigerant to absorb more heat.
Step-by-step explanation:
To increase superheat on a TXV (Thermostatic Expansion Valve) system, you would turn the adjustment spring clockwise. Turning the spring clockwise increases the force on the valve, thus requiring higher superheat before the valve will open. This adjustment means that the refrigerant will absorb more heat before the TXV responds, leading to an increase in superheat. The adjustment is actually a delicate process and should be performed only by qualified personnel, following the manufacturer's guidelines to ensure proper functioning of the refrigeration system.
A TXV system is a type of expansion valve used in refrigeration systems. By turning the spring clockwise, you are increasing the tension and reducing the opening of the valve, which decreases the flow of refrigerant through the system. This results in an increase in superheat, which is the temperature of the refrigerant above its boiling point.