What symptom might suggest that the compressor discharge pressure is too high due to improper operation of the evaporative condenser?

A symptom that might suggest that the compressor discharge pressure is too high due to improper operation of the evaporative condenser is the presence of a scaled coil surface. When the coil surface becomes scaled, it indicates that there is a buildup of mineral deposits that can interfere with the condenser's ability to transfer heat effectively. This inefficiency can lead to higher pressures in the compressor discharge because the refrigerant is not being adequately cooled and condensed.

In evaporative condensers, the cooling efficiency is crucial, as the condenser relies on both the airflow and the evaporation of water to dissipate heat. When scaling occurs, the heat transfer surface area is reduced, causing the refrigerant to remain in a gaseous state longer than necessary, thus increasing the pressure. This reflects the system's inability to manage its thermal load, ultimately resulting in higher discharge pressures.

Other symptoms, while potentially indicative of issues within the system, do not directly correlate with compressor discharge pressure issues related to the evaporative condenser’s operation in the same way. For instance, bubbles in the sight glass typically indicate low refrigerant charge or excessive turbulence, oil around the compressor might suggest leaks or system lubrication issues, and temperature differences before and after a strainer are more related to flow and particulate blockage rather than