When changing out a compressor in a system with R502, what procedure should you follow if your recycling equipment was manufactured after November 15, 1993?

When changing out a compressor in a system using R502, it's essential to adhere to proper procedures specified for handling refrigerants to ensure safety and environmental compliance. When recycling equipment was manufactured after November 15, 1993, it indicates that it complies with current regulations related to refrigerant recovery and handling.

Evacuating the isolated section of the system to 10 inches of vacuum and holding it is a recommended practice because it helps to remove any moisture and contaminants from the system. Achieving this level of vacuum ensures that the area is sufficiently cleared before making any repairs or changes, which is crucial for maintaining equipment integrity and preventing issues such as oil contamination or freezing moisture when the system is recharged.

This level of evacuation is generally considered a standard practice in HVAC systems, as it also confirms that any remaining refrigerant has been appropriately removed, in compliance with regulations surrounding the environmental impact of refrigerants. Therefore, evacuating to 10 inches and holding it is both a safe and regulatory-compliant procedure when dealing with R502 in a compressor change-out scenario.