Kongsberg Simrad MF90, Installation Manual

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476671/B
117
A dedicated O-ring is provided with the MF90 system delivery. This O-ring ensures a
watertight connection between the installation trunk and the bottom of the transducer shaft
sleeve. During the installation process, make sure that this O-ring is kept safe from damage,
and that the top of the installation trunk is kept clean, smooth and without physical damage
such as scratches or dents. Proper O-ring lubrication must be applied before the hull unit is
mounted on top of the installation trunk.
Note
The hull unit is heavy. Appropriate lifting equipment (lifting tackle, portable crane or ship’s
crane) is required. Always use appropriate lifting equipment to minimize risk of personnel
injury or equipment damages. Only certified equipment must be used.
Context
As a general recommendation, the hull
unit shall be oriented with the hoisting
motor pointing aft. If this orientation
makes it difficult to access electrical
connections, the hull unit may be rotated
during its installation to the most suitable
direction.
The hull unit, transducer and transducer
cable must be handled with care.
Note
• The transducer is protected with
a thick layer of foam to prevent
damage during transport and hull
unit installation. This protection must
remain attached while the hull unit is
being manoeuvred into the sonar room.
• The transducer is covered with a thick red or black protective coating made of a special
plastic type. The protective coating is a vital part of the transducer. It is very important
that neither this coating nor the internal parts of the transducer are damaged during the
handling, installation or cleaning. Any holes and/or scratches in the transducer surface
will allow water to penetrate the transducer. If a leak occurs, the transducer must be
replaced.
• The top mating surface of the installation trunk must be protected with a blind flange
or wooden cover at all times until the hull unit is installed. It is very important that
Installing the hull unit