All cooling systems containing more than 50 lbs of refrigerant must be repaired when the annual leak rate exceeds what percentage?

• A. 5%
• B. 10%
• C. 15%
• D. 20%

Answer: (C)

The correct percentage for the annual leak rate that triggers a repair requirement for cooling systems containing more than 50 lbs of refrigerant is indeed 15%. According to the regulations outlined by the EPA, any appliance that exceeds this leak rate is considered to have an excessive leak rate and must be repaired. This regulation is in place to minimize refrigerant emissions into the atmosphere, which can contribute significantly to environmental concerns, including ozone depletion and global warming.

The 15% threshold reflects the industry's focus on not only maintaining efficiency but also adhering to environmental standards aimed at protecting the atmosphere. Cooling systems are often subject to rigorous scrutiny, as refrigerants can have high global warming potentials. Therefore, meeting the requirement to repair systems with a leak rate above this percentage helps to ensure compliance with federal regulations and to promote overall sustainability in refrigerant use.

Understanding this threshold is essential for technicians and operators of cooling systems, as it guides them in managing maintenance, conducting regular leak checks, and ensuring that systems are operating within EPA guidelines.