Simrad SC90, Installation Manual

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419050/B
Note
The physical distance between the Transceiver Unit and the hull unit is limited by the
length of the transducer cables. The physical distance between the Transceiver Unit and
the Power Supply Unit is limited by the length of the Ethernet and power cables.
Requirements for insulation, heating and ventilation
The bulkheads in the sonar room must be insulated and provided with an interior wall
to the deck. The room must be equipped with heater, and it must be connected to the
vessel's ventilation system.
Insulation requirements
The insulation in the sonar room should be the minimum equivalent of 50 mm of
rock-wool. Piping passing through the space prone to condensation must be properly
insulated.
Heating requirements
Heating is an effective method for reducing humidity. The heater in the sonar room must
dimensioned to maintain the equipment within its environmental tolerances. Typical
heating power is minimum 1000 W. The heater must be installed close to the deck.
Ventilation requirements
The sonar room must be connected to the vessel's ventilation system to ensure a supply
of cooling air. If a ventilation system is not available, install two 3” pipes from the sonar
room to a suitable fresh air location on deck.
The fresh air should enter the room as close to the floor as possible, and should be
extracted from as high as possible. A funnel shaped drip-collector must be mounted
below the vent pipes to divert moisture to the bilge. On the main deck, the best
ventilation is provided when the outlet pipe is at least four meters higher than the inlet
pipe. To keep out sea water, rain and spray, the ventilation pipes must be fitted with
goosenecks or an equivalent design.
Note
If the vessel is likely to operate in tropical conditions, a suitable air conditioning system
must be installed. The air conditioning system must be able to provide an ambient
temperature that does not exceed the maximum operating temperatures of the SC90
units that are installed in the room.
Simrad SC90 Installation Manual