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6.3.4.
Inspection and maintenance of the sea chest
Clean the sea chest and check for signs of corrosion
and coating damage, which may have been covered by
marine growth (especially the top plate and the
mounting frame).
Repair when necessary to prevent galvanic corrosion.
When a new coating is applied,
do not coat the tube
bundle, the copper anodes and cathode plates of the
ICAF system or the sacrificial anodes
(if applicable).
Inspect and clean the inlet and outlet slots to ensure
an unobstructed water flow.
6.3.5.
Clean or replace the anodes
Replace the sacrificial anodes and the ICAF-‐anodes or
clean them down to bare metal when replacement is
not yet needed (refer also to the manual(s) from the
manufacturer of the systems and observe all relevant
maintenance instructions).
6.3.6.
Re-‐install the water cover
After inspection and servicing, re-‐install the tube
bundle and the water cover according to the
instructions of sections 4.3 and 4.4.
Replace the gaskets -‐ do not reuse the old gaskets
.
Replace damaged bolts.
6.3.7.
Pressure testing the box cooler
After re-‐installation it may be necessary to pressure
test the box cooler.
1)
Blind the nozzles with rubber gaskets (e.g., cut
from rubber sheets) and properly sized blind
flanges. Provide a manual air vent valve at the
highest point to bleed off the air that is present in
the system.
2)
Fill the box cooler through a feeder with a
suitable, non-‐corrosive, unheated liquid while the
air vent is open. Close the vent after all air has
been evacuated.
3)
Raise the pressure to the test pressure shown on
the type plate by using a suitable pump. Use a
properly calibrated pressure gauge to adjust to
the right pressure.
Pressurize the system for 30 minutes (at room
temperature).
Do not overload, do not exceed the duration!
4)
Inspect for leakage and loss of pressure during the
time the box cooler is under pressure.
No leakage or residual deformation is permissible.
In case of leakage, this needs to be repaired (see
section 7).
5)
Slowly de-‐pressurize the box cooler to
atmospheric pressure.
6)
Open the vent and drain the liquid completely.
Rinse afterwards, when required.
6.3.8.
Fit the piping and re-‐commission the
box cooler
1.
Re-‐install the piping according to the instructions
of sections 4.7.
2.
Replace all gaskets with new ones -‐ do not reuse a
used gasket.
3.
Re-‐commission and start the box cooler according
the instructions of sections 5.1 and 5.2.
6.4.
ORDERING SPARE PARTS
Order spare parts from Duramax Marine®. The following
information should accompany spare parts orders:
§
project number and order number
§
complete description of type (see the technical
specification or the type plate)
§
required part (for a description, see the supplied
documentation or the type plate)
