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acids below, if the position of the connections, etc, makes this
possible.
· 5% phosphoric acid
· 5% oxalic acid
· 10% citric acid
• Make sure that the heat exchanger is filled completely with liquid
and leave the unit in the bath for about one hour.
• Empty the heat exchanger and immediately rinse it thoroughly with
water.
• If the heat exchanger is heavily scaled, the treatment may need to be
repeated. If this happens, consider reducing the time between
descaling operations.
Pressure testing
• Pressure-test the heat exchanger with water at 3 - 6 bar(e). Pressure-
test one side and check that water does not leak from the connections
on the other side, or through the soldering.
Do not use other acids or other concentrations than those
listed above.
Working with acids may be dangerous. Follow the
instructions and safety regulations of the chemical
suppliers.
After disconnecting the heat exchanger connections,
always fit new gaskets to avoid leakage läckage.
Use only water for pressure testing and do not exceed 10
bar(e).
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