J/Boats J/109 Owner's Manual - page 41
J/109 OWNER GUIDE
41
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Battery Monitoring System: a small panel located above the DC Panel on the J/109 tests the
condition of the batteries and DC circuits. Please refer to the instruction manual provided with the
boat for more information.
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Mast Wiring Terminal Box: is located forward of the main bulkhead. A wiring harness exits the
mast and leads above the headliner on centerline (under the wood trim) of the headliner through
the bulkhead to the junction box, this is wired directly into the D.C. system through a terminal strip.
Once this wiring is installed, test each function to insure proper operation.
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Battery Switch: The battery switch is located under the navigation table. It is a three-position
switch that turns on either standard battery (1 or 2) or combines the power of both batteries in the
“Both” position. With the addition of the optional 3
rd
battery, two batteries are combined as a single
bank on the “2” position of the switch.
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The 100 Amp Balmar Alternator is attached to the engine and creates a charging current for the
batteries only when the engine is running. The status of the battery switch (1, 2, or Both)
determines which batteries are being charged.
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Accessories: such as navigation instruments, stereo, radar, GPS, etc… can be added to the
electrical panel and the 12 VDC system. Extreme care and forethought is necessary for installation
as these are sensitive instruments and require some measure of protection. We recommend that
owners hire a qualified marine electrician to complete these tasks. Be sure all sensitive accessories
are not only grounded properly but that “fast blow” fuses are run off the panel for extra insurance
against damage to their components.
110 VAC Shorepower System
The 110 Volt AC shore power system is functional only when the boat is plugged into suitable power from
shore. The cord provided as part of the option has the standard end for 30 amperage service. Ensure the
plug prongs match those on the dock inlet, insert and twist to lock it. Then screw down the outer ring to seal
the cord from water and to prevent it from pulling out. The AC panel for shore power is located in the nav
station next to the primary DC panel. Due to the length of the wire run from the inlet to the electrical panel,
there is a circuit breaker located high on a bulkhead in the starboard storage locker. This switch needs to
be on in order for shore power to reach the panel.
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AC Main Power Switch: Located on the panel, to activate AC power panel, use this switch.
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AC Panel: indicates line voltage being received from the shore circuit with an indicator light. The
line voltage will vary with the number of appliances operating on the same circuit. In large marinas
there may be a large number of boats on the same circuit, causing fluctuations.
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AC Normal/AC Reverse Polarity Light: The AC panel has a red light to show when the polarity is
reversed. Care should be taken not to operate 110 AC systems on board with reversed polarity.
Double-check shore connections. If problems still persist, then notify dock master to repair the
shore plug. NOTE- Even though the switches are in the appropriate position, the shore power
system in no way assures personal safety using electrical apparatus.
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Gavlanic Isolator: This device indicates and isolates any low voltage stray current on the AC
circuit. There is a small panel mounted above the AC Power Panel in the nav station with indicator
lights and self-test button. Please refer to the specific manual included with the boat for more
information.
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Water Heater: switch supplies power to the water heater 110 AC element for hot water while
dockside. Note the precautions regarding the use of electrical power to heat water are contained in
the plumbing section of this manual.
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Outlets: located throughout the cabin supply power for 110 AC accessories. The entire system
has “ground fault” protection.
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Ground Fault Systems: There is a single ground fault systems on the J/109 that protects all AC
outlets.