What is one method to remove moisture from refrigeration systems before charging with refrigerant?

Using a deep vacuum is a vital method to remove moisture from refrigeration systems prior to charging with refrigerant. When a refrigeration system is put under a deep vacuum, it lowers the pressure inside the system, allowing any moisture or water vapor present to evaporate. As the water vapor turns into gas, it is effectively drawn out of the system, preventing the formation of ice and other issues that moisture can cause, such as corrosion and inefficient operation.

The process of achieving a deep vacuum usually involves using a high-capacity vacuum pump that can reach significantly lower pressures than what is obtained during a simple vacuum. This ensures that even small traces of moisture are removed, which is essential for maintaining the integrity and efficiency of the refrigeration system.

Proper moisture removal is crucial since any remaining moisture can react with the refrigerant and oil causing chemical breakdown and creating acids, leading to damage within the system components. This makes the deep vacuum method the most effective and recommended practice before introducing refrigerant into the system.