Final answer:
To calculate additional refrigerant needed for a 50-foot line with 15 feet precharged, subtract the precharged length from the total required length and multiply the remainder by the refrigerant rate per foot. In this case, you would need an additional 21 ounces of refrigerant.
Step-by-step explanation:
If you have a precharged line set good for 15 feet and the total length you require is 50 feet, you need to determine how much additional refrigerant is required to charge the remaining length of the line. Since the total length is 50 feet and the line is precharged for the first 15 feet, you will only need to add refrigerant for the additional 35 feet (50 feet - 15 feet). At a rate of 0.6 ounces per foot, you would calculate the additional refrigerant needed by multiplying 35 feet by 0.6 ounces per foot.
To perform this calculation:
- Subtract the precharged length from the total length: 50 feet - 15 feet = 35 feet.
- Multiply the remaining length by the refrigerant per foot rate: 35 feet x 0.6 oz/foot = 21 ounces.
Thus, you will require an additional 21 ounces of refrigerant to fully charge the 50-foot line.