What type of pressure differential is needed to properly adjust an overfeed evaporator in a recirculated system?

The correct choice is related to the operational requirements of an overfeed evaporator in a recirculated system. A pressure differential of 10 PSI is crucial for ensuring the proper circulation of refrigerant within the system. This range typically allows for optimal flow characteristics, ensuring that the refrigerant adequately absorbs heat and functions efficiently without causing issues such as flooding or insufficient evaporation.

In practical terms, having this specific pressure differential allows for a balanced system, where the flow of refrigerant matches the evaporator's capacity, thereby improving performance and reliability. Holding to this standard is important because it helps maintain the designed operating conditions which influence both energy efficiency and system longevity. Adjusting the pressure differential too low could lead to inadequate refrigerant movement, while setting it too high could risk system damage or inefficient operation.