Where should you manually purge a condenser when it is not running?

Manually purging a condenser when it is not running should be done from the highest point, which is often the inlet of the condenser. This approach helps effectively remove any air or non-condensable gases that may be trapped within the system. When a condenser is not in operation, these gases can accumulate at the top due to their lighter density compared to refrigerants or other working fluids.

By purging from the highest point, you ensure that these gases are expelled before the system is put back into operation. Doing so helps maintain optimal efficiency by ensuring that the condenser can perform at its best without the interference of unwanted air or gases.

Other methods, such as purging from the lowest point or while the condenser is running, may not be as effective in removing air or non-condensables and can potentially lead to inefficiencies or problems in the system's operation. Therefore, ensuring that purging occurs from the highest point is critical in maintaining the integrity and efficiency of the condenser system.