Explain the difference between superheat and subcooling and how they relate to refrigerant charge adjustment.

Explain the difference between superheat and subcooling and how they relate to refrigerant charge adjustment.

• A. Superheat is the vapor temperature below saturation; Subcooling is the liquid temperature above saturation; both indicate proper charge.
• B. Superheat is the vapor temperature above saturation at the evaporator outlet; Subcooling is the liquid temperature above saturation at the condenser outlet; both indicate proper charge.
• C. Superheat is the vapor temperature above saturation at the evaporator outlet; Subcooling is the liquid temperature above saturation at the condenser outlet; both indicate improper charge.
• D. Superheat is the vapor temperature above ambient; Subcooling is the liquid temperature below ambient; not related to charge.

Answer: (D)