Si-tex NAVSTAR 10, Operation Manual

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Installation of the Transducer
Installing the Power Cable-
1
st
) The 6-foot power cable supplied with the display unit should reach the source of DC power.
Connect the power leads directly to the main battery isolation switch or breaker, or route the power
leads to the DC power distribution panel. At the power source, connect the red wire to the positive
terminal (+), and the black wire to the negative terminal (-). The negative terminal may also be called
"ground" or "earth." (The display unit is internally protected if you accidentally reverse the polarity of
the power wires.)
2
nd
) Attach the red or positive wire to a 5 amp circuit breaker. If the unit is connected directly to the
boat's battery, include a 2amp in-line fuse. (In-line fuses are available at most marine supply stores.)
3
rd
) To prevent any interference or electrical noise, separate the Sonar power wiring as much as
possible from other devices. See the section on "EMC Installation Guidelines."
4
th
) If you need to extend the power wiring by more than 10 feet, use a larger wire size. This will
allow the wires to deliver the correct voltage in spite of the longer wire distance. For runs of 20 to 35
feet, use #14 AWG wire. If you need to extend the power wiring, be sure all electrical connections
are solid and durable. Insulate all connections using heat-shrink tubing or electrical tape. You may use
crimp connectors or a terminal strip, but be sure to use good-quality marine-grade parts.
5
th
) Plug in the power cable at the rear of the display unit.
6
th
) When you press the Power button, the display unit should turn on. If the unit will not turn on and
you suspect that you may have reversed the power connections, check the DC power lines all the way
back to the battery. If the polarity is not correct, reconnect the leads properly and try again.
(The display unit is internally protected if you accidentally reverse the polarity of the power wires.)