What is the total refrigerant charge for a system supplied with 5 pounds 10 ounces for a 15-foot line set, but has a 25-foot line set requiring additional refrigerant?

The correct total refrigerant charge for the system can be determined by understanding how refrigerant charge adjustments are made based on the length of the line set. In this case, the initial charge supplied is 5 pounds 10 ounces, which serves as a baseline for the system with a 15-foot line set.

However, since the actual installation requires a 25-foot line set, it is necessary to account for the additional length. Typically, for every foot of extra line set, there is a specified charge of refrigerant that needs to be added to ensure proper system operation. By calculating the difference in length, which is 10 feet (25 feet - 15 feet), and applying the normal refrigerant charge rule for extra line lengths, one would find that starting from the initial 5 pounds 10 ounces, the system requires an additional charge.

Assuming that the charge needed for the additional line length of 10 feet is equivalent to 6 ounces, adding this to the original charge gives a comprehensive total of 6 pounds.

It’s essential in HVAC systems to make these types of adjustments to ensure that the system operates efficiently and maintains proper pressure levels. Therefore, the correct total refrigerant charge is represented as 6 pounds, reflecting the