2
2.1.1.
Mounting arrangement
The box cooler can be mounted in 2 different ways:
§
Transversely (athwartships)
: this is the most common
way to mount box coolers (see fig. 1a).
§
Longitudinally, parallel with fore and aft centerline
(see fig. 3b).
Whichever mounting method is chosen, the sea chest
requires inlet and outlet slots to allow uninterrupted water
flow (see also section 4.1).
There are also different methods for installation, from
above (top-‐mounted) or from below (bottom pull). See
section 4.2.
For the specific details of the supplied box cooler, see the
attached technical specifications and the supplied drawing.
Figure 1b. Refer to the supplied drawing.
2.1.2.
Preventing biological marine growth
While Duramax Marine® box coolers require very little
maintenance they are exposed to seawater and can
potentially become fouled. The build-‐up of biological
marine growth (such as algae, mussels, barnacles and
other shellfish) on the external surfaces of the tube bundle
may seriously reduce the thermal efficiency.
Marine growth is a greater problem in coastal waters than
in the open sea.
An electrolytic anti-‐fouling system (ICAF system
2
) is often
needed to reduce this undesirable marine growth. An ICAF
system releases copper ions into the seawater which
prevents the settlement of macro marine fouling.
An ICAF system can be mounted in the sea chest, below
the box cooler. Or, alternatively, the box cooler can be
supplied with an integrated ICAF system. See section 4.5.
2
ICAF system = Impressed Current Anti-‐Fouling system.
2.2.
INTENDED USE
The box cooler is custom built according to the order
and the attached technical specifications.
§
Safe and trouble free use of the box cooler require
that:
a)
the box cooler is used as intended and when in
proper working order
b)
the operating conditions are kept within the
design limits
c)
all installation, operating and maintenance
instructions are observed.
§
The box cooler may only be installed, operated and
maintained by suitably qualified, capable and
instructed engineers, operators and electricians.
§
The box cooler is intended for use by professional
personnel only.
§
It is assumed that the liquid circulates in a closed
system and that inhibitors are added (when required)
to prevent internal corrosion and fouling. (Note that
the adding of inhibitors may have consequences for
the performance of the box cooler. Check the
technical specifications or contact Duramax Marine®
for advice.)
§
The user is responsible for ensuring that the intended
contents of the box cooler will be compatible with the
materials used to construct the box cooler. The
material used for the tube sheet is CuZn38SnAl and for
the tubes CuZn20Al2 (aluminium brass).
§
No special measures are taken to protect the box
cooler against cyclic loads, resonance or vibrations
(causing fatigue), impact loads, water hammer,
surging, shocks, fire or lightning stroke.
§
Misuse or failure to observe the instructions in this
manual may invalidate the warranty. Duramax
Marine® also rejects any liability for personal injury or
material damage resulting from misuse or from failure
to observe the instructions in this manual.
