According to the B-52 mechanical code, to what percentage should liquid receivers be filled during pumpdown at 32 degrees Celsius?

The correct percentage for filling liquid receivers during pumpdown at 32 degrees Celsius, as outlined in the B-52 mechanical code, is indeed 90%. This specific guideline is set to ensure safe and efficient operation of refrigeration systems. Maintaining the receiver fill at 90% helps to prevent excessive pressure buildup and provides sufficient volume for proper fluid dynamics within the system. It also ensures that there is adequate space for the vapor to expand, which is crucial for maintaining system reliability and efficiency. Proper understanding of these parameters is essential for technicians to avoid potential system failures or safety hazards related to overfilling.