What is true about compressor motors that operate inside the refrigerant atmosphere?

Compressor motors that operate inside the refrigerant atmosphere face specific challenges due to the conditions they are exposed to. One significant aspect is their susceptibility to overheating. Operating within a refrigerant environment means these motors are continually subjected to varying temperatures, pressures, and refrigerant properties, which can lead to inefficiencies and possible overheating if not properly managed.

Additionally, contamination is another critical factor. The internal environment can include moisture, debris, or residual chemicals from the refrigerant, which may lead to corrosion, wear, and reduced functionality of the compressor and its components. This contamination can impair the motor's operation over time, potentially leading to failure.

Thus, both overheating and contamination are valid concerns for compressor motors in refrigerant environments, which substantiates the statement that all of the provided factors are true. Understanding these challenges is crucial for maintaining the longevity and performance of compressor motors.