What element is NOT included in safe operating procedures for draining oil from an ammonia refrigeration system?

In the context of safe operating procedures for draining oil from an ammonia refrigeration system, the use of system pressure to facilitate the drain is typically not included as a recommended practice. This is primarily due to safety concerns associated with handling high-pressure systems.

Utilizing system pressure can inadvertently lead to dangerous situations, such as injury from pressurized oil or ammonia release if not managed properly. Proper safety protocols emphasize the importance of minimizing the risk of leaks or hazardous situations, which can arise from using system pressure to assist in draining.

On the other hand, using a suction pump is a safe method of removing oil, as it allows for better control over the draining process. Observing safety protocols is imperative in all aspects of ammonia refrigeration operations, including draining activities, to ensure the wellbeing of personnel and the environment. Additionally, proper disposal of the oil is crucial for environmental protection and compliance with regulations.