The consequences of ignoring overflow extend far beyond the water bill. Cooling tower water is treated with biocides, corrosion inhibitors, and scale preventatives. When the tower overflows, these expensive chemicals are literally washed down the drain. Furthermore, the introduction of excessive fresh (makeup) water changes the chemistry of the system, potentially lowering the cycles of concentration. This introduces new minerals and oxygen, accelerating corrosion rates and scale formation on the fill media and heat exchangers. Left unchecked, the tower’s efficiency plummets, requiring more energy to achieve the same amount of cooling.
To understand why a cooling tower overflows, one must first understand its standard operation. The tower relies on a basin, or sump, to hold a specific volume of water. As water evaporates during the cooling process, the level drops, triggering a makeup water valve to open and replenish the supply. Overflow occurs when the input of water exceeds the system's capacity to contain or evaporate it. The failure usually originates from one of three distinct sources: mechanical failure, control logic errors, or hydraulic imbalances. cooling tower overflow
💡 If your tower overflows every time it shuts down, your basin level is likely set too high. Try lowering the float by two inches to create a "buffer zone" for water returning from the pipes. The consequences of ignoring overflow extend far beyond
Inspect valves and sensors monthly. Remove scale buildup from probes and ensure mechanical arms move freely. To understand why a cooling tower overflows, one