What is a common practice before handling refrigerants?

• A. Increasing system pressure
• B. Evacuating the system
• C. Heating the system
• D. Using an unregulated vacuum

Answer: (B)

Prior to handling refrigerants, evacuating the system is essential as it ensures that all refrigerant has been removed, thus preventing accidental release into the atmosphere. This practice not only protects the environment by minimizing the escape of potent greenhouse gases but also safeguards technicians from potential exposure to harmful chemicals.

Evacuation typically involves using a vacuum pump to remove moisture and any remaining refrigerant from the system. This step is critical because leftover refrigerant can interfere with the system’s pressure and efficiency and might cause contamination if the system operates with residual moisture or non-condensable gases.

Taking this precaution helps maintain the integrity of the HVAC system and complies with regulatory standards aimed at minimizing refrigerant emissions.