R-Pro › Field cases › Chillers
Poor Heat Transfer from Scale Buildup on Cooling Tubes (Water-Cooled)
Likely causes
Calcium/magnesium scale from poor water quality management
Check: Measure cooling tube inlet-outlet temp diff (scale suspected if >2°C above design)
What to do: Measure cooling tube inlet-outlet temp diff (scale suspected if >2°C above design) → Perform chemical descaling (acid wash) or mechanical descaling (brush cleaning) → After descaling, analyze cooling water quality (maintain pH 7–8) → Consider installing automatic water treatment chemical dosing → Perform annual descaling thereafter
Cooling water pH not managed
Check: Perform chemical descaling (acid wash) or mechanical descaling (brush cleaning)
What to do: Perform chemical descaling (acid wash) or mechanical descaling (brush cleaning) → After descaling, analyze cooling water quality (maintain pH 7–8) → Consider installing automatic water treatment chemical dosing → Perform annual descaling thereafter
Descaling schedule not followed
Check: After descaling, analyze cooling water quality (maintain pH 7–8)
What to do: After descaling, analyze cooling water quality (maintain pH 7–8) → Consider installing automatic water treatment chemical dosing → Perform annual descaling thereafter
Scale on cooling tube walls is impeding heat transfer, raising condensing temperature and high-side pressure. Descale the tubes. Close refrigerant valves during acid wash to prevent cleaning solution from entering the refrigerant circuit.
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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