Why should compressor oil be heated to 130 degrees F when removing oil from a low pressure system?

Heating compressor oil to 130 degrees F during removal from a low pressure system is primarily done to reduce its viscosity. As oil is heated, its viscosity decreases, making it easier to flow. This facilitates the efficient removal of oil from the system, ensuring that it can be drained completely and effectively. Proper oil removal is crucial for maintaining system performance and longevity, as residual oil can affect the operation of refrigeration and air conditioning systems.

When oil is at a higher temperature, it holds less refrigerant. This is significant because it minimizes the chances of refrigerant being carried out along with the oil, which can lead to a loss of refrigerant in the system. The goal in maintenance practices is to keep the amount of refrigerant loss minimal while effectively managing oil within the system.

While lubrication is an important aspect of compressor operation, the primary reason for heating the oil during removal is to reduce viscosity, ensuring that the oil can be drained easily.