Which temperature is generally expected for the oil temperature during abnormal conditions?

During abnormal conditions in refrigeration systems, maintaining an appropriate oil temperature is crucial for ensuring the longevity and effectiveness of the compressor. An oil temperature around 154°F is generally expected in such conditions because higher temperatures can indicate issues like inadequate oil circulation or excessive heat generated by the compressor due to higher operational loads or other anomalies.

This temperature allows the oil to effectively lubricate moving parts while also ensuring that it remains fluid enough to circulate properly throughout the system. If the oil temperature were significantly lower, such as at 75°F or 26°F, the oil might not provide adequate lubrication or cooling, potentially causing increased wear or failure of components. Conversely, temperatures much higher than 154°F could lead to oil breakdown, increased wear, and ultimately, system failure.

So, in the context of abnormal operational scenarios, 154°F serves as a critical threshold for proper oil performance, making it the most appropriate choice among the options provided.