Cleaning Of Water/Oil Cooler - Kongsberg Frydenbo IRV-2 Maintenance Manual

Maintenance Manual
Clogging will reduce the heat transfer capacity of the Water/Oil cooler.
Methods for establishing a clogging problem:
•
Check water inlet and outlet temperature. Clogging results in reduced difference in water inlet
and outlet temperatures and a rise in oil temperature.
•
Check for a pressure drop across the cooler. Clogged and narrow passages will cause
acceleration in flow rate and increased pressure drop.
If temperature or pressure measuring reveals a clogged cooler:
1. Clean the Water/Oil cooler by removing all minor deposits by back flushing the cooler with
water.
Fouling can be dealt with using a light acid.
2. Use 5% phosphoric acid or, when cleaned frequently, 5% oxalic acid or similar light organic acid.
3. Rinse the cooler with a large quantity of water.
Make sure all acids are removed before restarting the system.
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Cleaning of Water/Oil Cooler

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