Final answer:
Evacuation is the process of creating a low pressure or vacuum in an air-conditioning system using a vacuum pump and gauges. This process removes air and moisture from the system before charging it with refrigerant.
Step-by-step explanation:
The process described in the question is called evacuation. Evacuation is the process of creating a low pressure or vacuum in an air-conditioning system using a vacuum pump and gauges. This is done to remove any air or moisture from the system before charging it with refrigerant.
During evacuation, a vacuum pump is used to remove air and moisture from the system. The gauges are used to monitor the pressure levels and ensure that a proper vacuum is achieved.
Evacuation is an important step in the air-conditioning system installation process, as it helps ensure the system operates efficiently and prevents damage to the components.