Which component is located inside the outdoor condenser unit and receives low pressure refrigerant vapor?

The component that is located inside the outdoor condenser unit and receives low-pressure refrigerant vapor is the compressor. The primary function of the compressor is to take in refrigerant vapor that has been exhausted from the evaporator, which has absorbed heat from the indoor environment.

Once the low-pressure refrigerant vapor enters the compressor, it is compressed to a higher pressure, which raises its temperature. This high-pressure vapor is then directed to the condenser coil, where it releases its heat to the outdoor air and begins the phase change into a liquid refrigerant. Without the compressor, the refrigerant would not be able to cycle effectively through the system, making it essential for the overall operation of the HVAC system.

The other components listed do have important roles in the refrigeration cycle, but they are either located in different parts of the system or have different functions. For instance, the evaporator is typically found indoors, the expansion valve is responsible for regulating refrigerant flow, and the filter is meant to clean the refrigerant system. Understanding these roles helps in diagnosing issues and ensuring proper maintenance of HVAC systems.