When should refrigerant be removed from the condenser outlet?

The correct answer is that refrigerant should be removed from the condenser outlet when the condenser is below the receiver. This situation often arises in systems where gravity plays a significant role in the flow of refrigerant. If the condenser is located below the receiver, there may be a risk of liquid refrigerant pooling in the condenser rather than flowing correctly into the receiver. This can lead to improper operation of the system and potentially cause damage.

By removing refrigerant from the condenser outlet in this context, you ensure that the refrigerant can flow properly through the system, reducing the risk of liquid refrigerant causing issues such as liquid slugging in the compressor, which can lead to severe mechanical failures.

In systems with condensers positioned at different heights, it's essential to manage refrigerant flow effectively to maintain system integrity and efficiency. This moving of refrigerant ensures a safe and optimal operational state, especially during service or maintenance tasks.