MTS Water Quality Guide User Manual
Page 17
Heat Exchanger Care and Water Quality Guide
Heat Exchanger Care
17
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Be careful using sealant tape on pipe threads, which lessens the degree of
resistance between mating parts, and results in a greater chance for cracking
the heat exchanger castings. Do not over-tighten pipe connections when re-
mounting the heat exchanger after you have disassembled it for
maintenance.
•
When you are ordering replacement parts, mention the model and serial
number of the heat exchanger, the model of the HPU and the original MTS
job number.
Commercial solvents may cause irritation to eyes and skin.
Always wear protective clothing, eye protection, and if required a respirator. Follow the
manufacturer's safety instructions when using chemicals.
For hydraulic fluid-to-
water heat exchangers
only
Depending on fouling conditions, MTS recommends inspecting your heat
exchanger every 500–2000 operating hours. If you notice a decrease in the
efficiency of your heat exchanger, it should be cleaned.
Stainless steel plate
heat exchangers
1. Clean all filters and screens.
2. Begin with an external inspection of the heat exchanger. Visually inspect
for:
•
Corrosion
•
Signs of a previous repair
•
Leakage
3. A marked decrease in pressure and/or reduction in performance usually
indicates cleaning is necessary. The following are suggested methods of
cleaning either side of the heat exchanger.
•
Back flush the heat exchanger with a high pressure stream of hot water
to remove loose deposits
•
Circulate hot wash oil or light distillate to remove sludge or similar soft
deposits.
•
To remove more stubborn deposits, try a commercial cleaning
compound such as “Oakite” or “Dowell”. Follow the manufacturers
instructions for using the cleaning compound.
Important
It is recommended that you contact a representative of the
manufacturer of the cleaning compound to determine the
correct cleaning compound for your type of scaling problem
and its compatibility with the metals and alloys used in the
heat exchanger.
4. If the heat exchanger is excessively fouled and cannot be cleaned using the
commercial cleaning methods, then replacement of the heat exchanger is
recommended.
WARNING