EPA Section 608 Universal Certification ExamCoreHard
A technician is performing a leak check on a low-pressure chiller operating with R-123. What is the maximum allowable leak rate for this appliance before repairs are mandated by EPA regulations?
- A15% of the total charge annually.
- B10% of the total charge annually.
- C5% of the total charge annually.
- D20% of the total charge annually.
Show answer & explanationAnswer & explanation
Correct answer: B. 10% of the total charge annually.
For low-pressure appliances, such as chillers operating with R-123, the EPA mandates repairs if the leak rate exceeds 10% of the total charge annually. This specific threshold is crucial for compliance.
Why the other options are wrong
- A. This is incorrect; 15% is the threshold for commercial refrigeration and industrial process refrigeration (IPR).
- C. This is incorrect; 5% is a common threshold for comfort cooling, but not low-pressure appliances.
- D. This is incorrect; 20% is not an EPA mandated leak rate for any appliance type.
EPA Leak Rate Thresholds
The EPA sets maximum allowable annual leak rates for various types of refrigeration and AC appliances, requiring repair when exceeded.
- Thresholds vary by appliance type (e.g., comfort cooling, commercial refrigeration, low-pressure chillers).
- Leak rate is calculated as the percentage of the total charge lost annually.
- Failure to repair within specified timeframes can result in penalties.
Memory trick: Comfort is 5, Low-Pressure is 10, Commercial is 15.