Which type of system is typically associated with the use of evaporator pressure regulators (EPR)?

Evaporator pressure regulators (EPR) are primarily used in systems with multiple evaporators to manage the pressure and maintain optimal evaporation temperatures within each evaporator circuit. In a multi-evaporator setup, EPRs help balance the refrigerant flow to ensure that each evaporator operates efficiently and prevents any one evaporator from becoming overloaded while others are underutilized.

This regulatory mechanism is particularly important because it allows each evaporator to function at its designed low-pressure level, enhancing the overall system performance and energy efficiency. The EPR keeps the evaporator pressure consistent, leading to improved cooling capacity and control in systems where multiple evaporators operate simultaneously and may encounter varying load conditions.

While single evaporator systems or specific heating applications might not require such precise control or do not benefit from the complexity that EPRs provide, their main utility is clearly observed in environments where multiple evaporators need coordination. Therefore, this makes the selection of a multi-evaporator system the most appropriate context for the use of evaporator pressure regulators.