Too cold can also be a problem
Water on the outside of a cold glass does not mean the glass leaks. Moisture from the air can condense on a cold surface.
Why the outside of a pipe gets wet
18°C in this example
15°C in this example
Condensation is possible
Learn dew point
Dew point is the temperature at which air with a given moisture content becomes saturated. A surface at or below it can develop condensation.
Room temperature alone is not enough. Changing humidity can change the risk even if the room temperature stays steady.
Apply it to cooling
Cooling design must keep equipment within its thermal and environmental limits. Colder coolant is not automatically better.
A leak alarm during a humidity change could involve condensation, an actual coolant leak, or another cause. Qualified staff must establish the source.
Do not dismiss moisture as harmless or improvise new coolant settings.
Try it yourself
The local dew point is 18°C and an exposed pipe surface is 15°C. Could condensation form?
Check your answer
Yes, because the surface is below the dew point. These are illustrative values, not recommended setpoints. The correct response depends on the approved system design and operating procedure.