What is meant by 'removing non-condensable gases' during deep vacuum evacuation?

Removing non-condensable gases during deep vacuum evacuation involves taking out any air or other gaseous substances that can be trapped within the refrigeration system. These non-condensable gases, which are typically composed of atmospheric air and other gases introduced during maintenance, can lead to several issues, such as reduced system efficiency, increased pressure, and impaired heat exchange processes.

When non-condensable gases are present in the system, they can disrupt the performance of the refrigerant, preventing it from condensing and evaporating properly. This disruption can lead to a decrease in the overall efficiency of the system, which in turn affects cooling performance and may increase energy costs. By removing these gases, the system can function optimally, ensuring proper cooling and heating cycles.

While eliminating moisture is indeed important for system health, that action is referred to in a different context than the removal of non-condensable gases. Similarly, improving thermal efficiency or extending the life of the refrigerant may be indirect benefits of proper evacuation but do not specifically address the definition of removing non-condensable gases. Thus, the focus is on the necessity of maintaining system performance by ensuring only the intended refrigerant is present within the system.