Non-condensables will cause?

Non-condensables, which are gases that do not easily condense under the given temperature and pressure conditions in the refrigeration or air conditioning system, can significantly impact the performance of the system. When non-condensables enter the system, they occupy space in the condenser and interfere with the heat transfer process. This causes an increase in the pressure within the condenser because the system is still trying to achieve the typical operating pressures designed for pure refrigerants.

As a result, the presence of non-condensables leads to a high discharge pressure because the system compressor must work harder to expel the refrigerant vapor, which already contains these non-condensable gases. This elevated discharge pressure can cause a range of issues, including reduced efficiency and potential overheating of the compressor.

In summary, the impact of non-condensables in a refrigeration system is characterized by an increase in discharge pressure due to their interference with the condensing process.