Recovered refrigerant may contain which of the following impurities?

Recovered refrigerant can contain several impurities that arise from the system from which it was removed. Acids, moisture, and oil are common contaminants found in recovered refrigerants.

Acids may be produced due to the breakdown of refrigerants or oil degradation, particularly in systems that have been subjected to high temperatures or certain operating conditions. Moisture can enter the system through leaks or improper handling and storage, which can lead to reactions that form acids and harm system components. Additionally, oil is a natural component of refrigeration systems, as it lubricates the compressor and other moving parts. When refrigerant is recovered, some of this oil often comes along with it.

By acknowledging the presence of these impurities, technicians can ensure proper handling and recycling of the refrigerant, as well as taking necessary steps for purification and management of both the refrigerant and the system itself. This understanding is essential for maintaining the efficiency and integrity of HVAC and refrigeration systems, as well as complying with environmental regulations.