When multiple compressors are installed in parallel, what must be ensured?

In a system where multiple compressors are installed in parallel, ensuring that the oil level is correct in all compressors is essential for maintaining effective operation and longevity. Each compressor relies on proper lubrication to minimize wear and prevent overheating. If one compressor has insufficient oil, it may operate less efficiently and even risk failure, leading to unbalanced operation across the system. Proper oil management is crucial because it also helps in consistent performance and reliability of the compressors, which is particularly important when they are working together to meet the refrigeration load.

While other factors such as uniform speed, equal refrigerant distribution, and having identical models may contribute to efficiency and reliability, the correct oil levels directly impact the health of the compressors in a more immediate and critical way. Thus, focusing on the oil level ensures that every compressor is functioning effectively within its design parameters.