When using a screw compressor with an oil separator, when should the heater operate?

The correct choice indicates that the heater should operate based on the oil temperature set point, meaning it will activate and deactivate as necessary to maintain optimal oil temperatures within the compressor system. Maintaining proper oil temperature is crucial for several reasons: it ensures adequate lubrication, prevents oil from becoming too thick at lower temperatures, and inhibits potential issues such as oil degradation or condensation of moisture that can harm the compressor.

In a screw compressor with an oil separator, providing stable operation through temperature regulation plays a pivotal role in ensuring efficient equipment performance and longevity. Monitoring and adjusting the heater's function based on the actual temperature allows for dynamic response to varying operational conditions, promoting overall system reliability while minimizing energy consumption.

While a consistent heater operation (like being on whenever the compressor runs) might seem beneficial, it does not account for scenarios where the oil is already at a suitable temperature, which could lead to unnecessary energy use. Similarly, relying on the heater only during specific conditions or avoiding it in the presence of ammonia disregards the importance of optimal oil temperature management regardless of the state of the system or contaminants present.