What is the primary function of the pump out unit?

The primary function of the pump out unit is to transfer refrigerant to an external receiver. This unit plays a crucial role in managing the refrigerant flow within the HVAC system, particularly in systems that require the efficient handling and storage of refrigerants. By moving the refrigerant from the system to an external receiver, the pump out unit helps prevent overcharging and ensures that the system operates efficiently. This transfer is essential for maintaining appropriate levels of refrigerant, which is necessary for efficient heat exchange and overall system performance.

In contrast, while increasing pressure, cooling, or compressing refrigerant are important functions within an HVAC system, those tasks are typically carried out by other components such as compressors, heat exchangers, or expansion devices, rather than by the pump out unit itself.