Controllers on EEV systems typically include pressure-temperature tables for what purpose?

Pressure-temperature tables in electronic expansion valve (EEV) systems are crucial because they provide essential information about the relationship between pressure and temperature for refrigerants used in HVAC applications. By consulting these tables, technicians can identify the appropriate refrigerants that match the specific operating conditions of the system.

Selecting the right refrigerant is vital for optimal system performance and efficiency, ensuring that the refrigeration cycle operates correctly within its designed parameters. The tables allow users to verify that at a given pressure, the refrigerant will vaporize or condense at the required temperature, facilitating effective thermal transfer and optimal cooling or heating performance.

This contextual understanding prevents issues such as refrigerant undercharging or overcharging that could lead to inefficiencies, increased wear on components, or even system failure. Thus, the reference to pressure-temperature tables is primarily about selecting appropriate refrigerants for the system's application.