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FNM

HPE Series 95

4. Remove the cap. Pay attention not to damage the seal gaskets.

5. Pull off the tube bundle. Pay attention to the fins during the tube bundle dismounting operations,

to not affect the exchanger performances.

6. Clean inside the tubes with a cleaning brush, remove any salt incrustations and wash with

fresh water.

7. Clean the outer part and the fins of the tube bundle from oil deposits using fuel and then dry

preferably with compressed air (max. 2 bar).

8. Reposition the tube bundle in the housing (take care of the fins during the bundle placing in the

casing). Properly position all the gaskets and the O-rings into the housing at the base of the

casing.

9. Reposition the cap.

10. Reposition the inlet pipes and screw the pipe clamps.

11. Verify for any leaks after tightening the screws.

3.3.15.3 Cleaning the fuel exchanger

To clean the exchanger follow the instructions:

1. Stop the engine and close the sea water circuit valve.

2. Empty the sea water circuit by unscrewing the anodes as described in paragraph 3.3.13 - Sea

water circuit cleaning – on page 87.

FNM HPE Series User Manual

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