What is the RCL of R-1234yf in PPM?

• A. 10,000
• B. 12,000
• C. 16,000
• D. 20,000

Answer: (C)

The Relative Concentration Limit (RCL) of a refrigerant, such as R-1234yf, indicates the maximum concentration of that refrigerant allowed in air without significant health risks. The RCL for R-1234yf is established based on toxicological evaluations, ensuring that it is a safe substance to use in the context of HVACR systems when handled properly.

In the case of R-1234yf, the RCL is specifically set at 16,000 parts per million (PPM). This value reflects the concentration at which the refrigerant can be present in the atmosphere without posing acute health risks to individuals, making it a critical factor in safety protocols and handling guidelines. Understanding this limit is essential for any professional working with A2L refrigerants, as it highlights the importance of monitoring refrigerant concentrations in environments where these chemicals are used.

The other values provided do not correspond with the established RCL, further solidifying the understanding that 16,000 PPM is the correct and safe limit for R-1234yf. Being aware of the RCL helps ensure safe practices and compliance with safety standards in refrigeration and air conditioning applications.