1. Reduced Cooling Efficiency: 134-a has a lower cooling capacity compared to R-12. As a result, the system may not cool as effectively when using 134-a, leading to warmer temperatures inside the space being cooled.
2. Higher Pressure: 134-a operates at higher pressures than R-12. This can put additional strain on the system components, such as the compressor and hoses, potentially causing leaks and premature wear.
3. Oil Compatibility Issues: R-12 systems are typically designed to use mineral oil as the lubricant for the compressor. 134-a, on the other hand, requires a different type of lubricant called polyolester oil (POE). Mixing these lubricants can lead to compatibility issues, causing damage to the compressor and other system components.
4. Material Incompatibility: Some components within an R-12 system, such as seals, gaskets, and hoses, may not be compatible with 134-a. This can lead to leaks and reduced system performance.
5. Environmental Concerns: While 134-a has a lower ozone depletion potential (ODP) compared to R-12, it still contributes to greenhouse gas emissions. It is important to properly dispose of and reclaim refrigerants to minimize their environmental impact.
Considering these potential issues, it is generally not advisable to use 134-a in an R-12 system without proper modifications and retrofits to ensure compatibility and safe operation. It is always recommended to consult with a qualified HVAC technician for proper guidance and service when dealing with refrigerant changes.
