Where do you manually purge a condenser when it is off?

Manually purging a condenser should be done from the highest point of the condenser. This is because the highest point typically allows any non-condensable gases or air trapped within the system to escape. Non-condensable gases can accumulate in the upper sections of the condenser, affecting its efficiency and performance.

By purging from this location, operators ensure that the system is returned to optimal working conditions prior to restarting. This practice is essential to maintain the integrity and efficiency of the refrigeration cycle since non-condensables can significantly reduce the heat exchange capacity of the condenser.

The other options would not effectively eliminate these gases because purging from the lowest point, the side, or the bottom may not facilitate the removal of trapped air or gases that rise within the condenser. Thus, purging from the highest point maximizes the effectiveness of the procedure.