NorthStar Navigation 491 Section TWO Installing the transducer, Safety considerations

SECTION TWO — Installing the transducer

Safety considerations

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.

491 INSTALLATION MANUAL Revision A PAGE 3