What is the purpose of a deep vacuum pump during system evacuation?

The purpose of a deep vacuum pump during system evacuation is to remove moisture and non-condensables. When a refrigeration or HVAC system is evacuated, it's crucial to eliminate any moisture and gases that can negatively impact the system's performance. Moisture can lead to the formation of ice in the evaporator, causing blockages and reduced efficiency. Non-condensables, such as air, can also dilute the refrigerant and hinder the cooling process, leading to increased pressures and potential system failures.

By creating a deep vacuum, the pump effectively reduces the pressure inside the system, allowing for the efficient removal of these unwanted substances. This process is essential for ensuring that the system operates optimally and that the refrigerant circulates without impurities that could cause damage or inefficiencies.