User guide

Inspecting the Heat Exchanger
Model 505G2.20 - 505G2.30 SilentFlo™ HPU Maintenance
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6. Remove the end bonnet from the water intake side of the heat exchanger.
If you have to remove a mounting bracket, use blocks of wood to support
the exchanger.
7. Internally inspect the exchanger for:
• Corrosion and erosion damage to the tubes and tube ends
• Fouling and corrosion deposits on the tubes
• Condition of the optional zinc anodes
• Damaged threads
8. If no further cleaning is needed, reassemble the heat exchanger using new
gaskets.
9. If there is evidence of fouling (sediments or light scale) or corrosion,
perform a mechanical or chemical cleaning as needed. Consult the Heat
Exchanger Care and Water Quality Guide (part number 015-164-000) for
more information on mechanical and chemical cleaning.