During an inspection, what is the first evidence of insufficient water treatment in the condenser water?

The first indication of insufficient water treatment in condenser water is often an increase in compressor head pressure. This occurs because inadequate treatment can lead to scale formation or biofouling in the condenser. When scale builds up on the heat exchange surfaces, it creates an insulating barrier that hinders heat transfer efficiency. Consequently, the system has to work harder to maintain desired temperatures, leading to an increase in head pressure.

This increases the load on the compressor, causing it to operate less efficiently. Such operational changes are critical indicators that signal a need for water treatment adjustments before more visible damages, like corrosion or noise anomalies, occur. Monitoring head pressure can therefore be a proactive measure in identifying water treatment issues early in their development.