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SECTION TWO — Installing the transducer
Safety
considerations
491 INSTALLATION MANUAL Revision A
WARNING!
Be sure to turn the power off before starting the
installation. Further, it is highly recommended that
you keep power off while you're performing the
installation. If power is left on or turned on during
the installation, fire, electrical shock, or other seri-
ous injury may occur.
Be sure to ground the equipment to prevent electri-
cal shock and mutual interference.
Be sure the transducer outputs are tied together
before handling to avoid electrical charge build-up.
WARNING!
Be sure to use a 3-amp fuse. Using the incorrect
fuse can result in fire or damage to the 491.
CAUTION!
Mounting the transducer requires drilling holes
through the hull; make sure the installation does
not cause the vessel to leak. A thru-hull installation
should be performed by a professional installer. Do
not attempt this unless you are fully qualified.
Do not perform a thru-hull installation of the trans-
ducer when the vessel is actually in the water.
Immediately after installing the transducer, be sure
to check for leaks, and don't leave the vessel in the
water for more than three hours before checking it
again.
Northstar assumes no responsibility for improper
installation of a transducer.
NOTE:
Be sure that the transducer doesn't interfere with
any of the on-board systems. Check all other sys-
tems to ensure that their performance doesn't
degrade when the transducer is connected.
PAGE 3
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