What happens if the pressure drop across the evaporator is between 2.5 lbs. and 5 lbs.?

When the pressure drop across the evaporator falls within the range of 2.5 lbs. to 5 lbs., it indicates that there could be an imbalance affecting the system's performance. Specifically, this condition suggests the potential need for an external equalizer. An external equalizer can help ensure that the pressure is balanced effectively throughout the system, optimizing performance and preventing issues such as inefficient cooling or overloading of the system components.

Maintaining proper pressure balance is crucial in HVAC systems to ensure that the evaporator operates correctly and efficiently. Without the use of an external equalizer when needed, the system may face more significant complications down the line, including performance drops and possible system failure. Therefore, recognizing the pressure drop within this specific range and understanding the need for an external equalizer is key to effective system maintenance and operation.