What must be done for field-erected refrigeration systems concerning testing?

For field-erected refrigeration systems, the requirement is to conduct testing after complete installation. This is essential to ensure that the system operates correctly and safely before it goes into full operation. Testing at this stage verifies that all components function together as intended and conform to safety standards. It helps identify any potential issues with system performance, refrigerant leaks, or improper connections.

Conducting the tests prior to complete installation or only after operation would not be adequate, as there would be no way of confirming that all components have been connected and installed correctly or that the entire system is functioning properly together. Additionally, exempting these systems from testing altogether would not meet safety regulations and best practices in the industry, as thorough testing is critical for the safety and reliability of any refrigeration system. Therefore, testing after the complete installation ensures compliance with applicable codes and standards, safeguarding both the system's efficacy and user safety.