A pump-down system should be equipped with which component?

In a pump-down system, the correct component to be equipped with is a liquid receiver. The primary function of a liquid receiver is to store the refrigerant in its liquid state after it has been condensed but before it enters the expansion device. This component is crucial in maintaining the refrigerant circulation in the system.

When the system is in a pump-down mode, the liquid receiver allows for the refrigeration system to effectively manage the refrigerant during low-load conditions and facilitates efficient operation when the cooling demand changes. It ensures that there is enough refrigerant available for proper cycling and that the pressure in the system remains stable. This is particularly important during the pump-down process, where the system can temporarily store excess refrigerant and avoid compressor damage due to losing refrigerant flow or creating a vacuum.

Integrating a liquid receiver in a pump-down system enhances the overall efficiency and reliability of the HVAC system, making it a critical component for effective operation.