Purging a double-pipe condenser should be done from which location?

Purging a double-pipe condenser is best done from the top, near the gas inlet. This is because when purging, it is essential to remove any air or non-condensable gases trapped within the system. Since these gases tend to rise due to their lower density compared to the refrigerant, starting the purge process from the top allows for effective removal of these gases.

By purging from this location, you ensure that the lighter gases can escape easily, thereby preventing any buildup that could impair the proper functioning of the condenser. This practice supports efficient system operation and helps maintain optimal performance by ensuring that only refrigerant remains in the condenser and that non-condensables do not interfere with the heat exchange process.