Indirect systems are classified as low probability if what conditions are met?

The classification of indirect systems as low probability is primarily influenced by safety and operational considerations. When all refrigerant piping and fittings are isolated, it significantly reduces the risk of potential refrigerant leaks into the occupied space. Isolation of these components enhances system safety, ensuring that any possible refrigerant escape is contained within the system. This containment directly contributes to a lower probability of exposure and hazards associated with refrigerants in case of a failure.

While proper training of technicians, minimal refrigerant usage, and regular inspections are vital for effective system management and safety practices, they do not specifically address the physical condition necessary to classify the system as low probability. Proper training aids in maintenance and operation; minimal refrigerant limits exposure risks; and regular inspections help in early detection of issues. However, the core factor for classification as low probability hinges on the isolation of refrigerant components, making it the definitive condition in this context.