5 Installation BlueCool S Series
14
5.7.1 Installing through-hull fitting
The sea valve on the through-hull fitting is used for safety
and maintenance purposes.
Install through-hull fitting, seal off with sealant and check
for leak-tight seating.
5.7.2 Installing sea water pump
Selecting sea water pump
To increase the operating safety, we recommend the use of
self-priming pumps. These are considerably less subject to
the collection of air which, for example, can enter the
system when manoeuvring in reverse or when heeling.
Cascading of several BlueCool S Series systems supplied via
one sea water pump and one sea water inlet is possible.
However, the maximum number should be limited to four S-
Series systems.
Each system requires a separate sea water outlet to check
the respective minimum flow rate and to enable an
operating check of the system. To adjust the flow rates,
throttles in the form of cross-sectional reductions may be
used if necessary.
If one sea water pump supplies several air-conditioning
units, a water distributor and pump relays are required. For
information on this topic, see Fig. 18, “BlueCool S (several
units, 1 pump)”.
A shut-off valve must be provided for each air-conditioning
unit.
Self-priming sea water pumps
If a self-priming pump is installed above the water line, the
pump head must be pre-filled during initial start-up or after
longer times at standstill to enable self-priming.
Pump characteristics
The pump characteristics enable the selection and
dimensioning of the sea water pump depending on
expected pressure losses in the entire system.
Operation of the pumps outside the pump characteristic can
result in pump damage due to motor overloading or
cavitation. Damage which occurs due to improper operation
is excluded from the warranty.
Installation
Install the sea water pump.
Make sure that the pump is accessible for maintenance
work.
It is urgently recommended that a vent be installed directly
behind the outlet opening of the sea water pump. This
especially applies to the pumps WB250/350/500/1000.
See Fig. 8.
CAUTION
Sea water enters when installed
incorrectly!
Boat can sink; danger of drowning.
Suitable measures must be taken to install the
through-hull fitting in order to prevent an
unchecked entry of sea water.
NOTE
• The sea water inlet must be mounted at the
lowest possible point below the water line
and below the sea water pump.
• Through-hull fittings must be installed with
the openings in the direction of travel to
produce supporting back-pressure in the
intake line
• Sailboats: install the through-hull fitting
near the centre of the hull
• Fast motor boats: install through-hull fitting
in rear section of hull.
NOTE
• We recommend installing the sea water
pump at least 0.25 m below the water line.
• If installation below the water line is not
possible, a self-priming pump must be used.
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