What is required when a condensing unit is pre-charged for 25' of refrigerant line but 32' is used?

When a condensing unit is pre-charged for 25 feet of refrigerant line, using 32 feet means that the system cannot operate efficiently or effectively unless the refrigerant charge is adjusted to account for the longer line.

In a refrigerant system, the amount of refrigerant charge is critical for optimal performance. The additional length of refrigerant line increases the total volume of refrigerant in the system. Since the pre-charged amount is designed to accommodate a shorter line, failing to add refrigerant would likely lead to low refrigerant levels in the system. This could result in insufficient cooling, reduced efficiency, and potential damage to the compressor over time due to inadequate lubrication and cooling.

Therefore, it is necessary to add refrigerant to ensure that the system operates within the recommended parameters, compensating for the extra line length. This adjustment is essential not only for system efficiency but also to prevent possible equipment failures.