EPA Section 608 Universal Certification ExamType III (Low-Pressure Appliances)Easy
Which of the following refrigerants is classified as a low-pressure refrigerant under EPA Section 608 regulations?
- AR-134a
- BR-22
- CR-410A
- DR-123
Show answer & explanationAnswer & explanation
Correct answer: D. R-123
R-123 (HCFC-123) is a hydrochlorofluorocarbon refrigerant commonly used in low-pressure centrifugal chillers and is explicitly classified as a low-pressure refrigerant under EPA Section 608 regulations.
Why the other options are wrong
- A. R-134a is a medium-pressure refrigerant.
- B. R-22 is a medium-pressure refrigerant.
- C. R-410A is a high-pressure refrigerant.
Common Low-Pressure Refrigerants
Refrigerants specifically categorized as 'low-pressure' under EPA Section 608 due to their operating pressure characteristics.
- Includes R-11, R-123, and R-113.
- Operate at pressures below atmospheric in the evaporator.
- Typically used in large centrifugal chillers.
Memory trick: Low chillers like their 123.