What should be done if additional piping is installed in a multisplit system?

In a multisplit system, when additional piping is installed, the system’s overall refrigerant charge must be adjusted to accommodate the added length of refrigerant line. This is crucial because refrigerant lines have specific charge requirements due to both their length and diameter, affecting how the refrigerant circulates and operates within the system.

When additional piping is added, it typically requires a certain amount of refrigerant to ensure that the system operates efficiently and effectively. Each manufacturer usually specifies a certain amount of refrigerant to be added for every additional foot of line, which helps maintain the proper pressure and flow of refrigerant. Failing to add the specified amount could lead to issues such as insufficient cooling, high pressures, or potential system failure due to improper refrigerant levels.

In contrast, using the existing refrigerant charge without any modifications could risk undercharging or overcharging the system, leading to potential inefficiencies or damage. Increasing the pressure in the entire system doesn’t solve the issue of refrigerant quantity needed for additional piping, and replacing the entire refrigerant line is unnecessary and impractical without addressing the charge itself. Thus, adding the specified amount of refrigerant for each additional foot of refrigerant line is the required procedure to maintain the system’s proper function.