What can help mitigate the issue of bubbles showing in sight glasses with a full charge?

Installing the sight glass in a vertical position is the correct choice for addressing the issue of bubbles appearing in sight glasses with a full refrigerant charge. When the sight glass is positioned vertically, the flow of refrigerant can be more uniform, allowing for a clearer view of the refrigerant state. In a vertical orientation, liquid refrigerant is more likely to occupy the bottom of the sight glass, while vapor rises to the top, reducing the mixing of the two phases and enhancing visibility of the liquid state, which minimizes the appearance of bubbles.

In addition to improving visibility, this orientation can help ensure that any liquid refrigerant that is present settles properly, providing a more accurate indication of the system's refrigerant charge. Proper positioning of the sight glass is an essential factor in effective refrigeration system monitoring and management.