Owner`s manual

3070 CENTER CONSOLE
PROPER FUSE OR BREAKER PROTECTION MUST BE PROVIDED FOR ALL 12-
VOLT EQUIPMENT ADDED. DO NOT OVERLOAD THE ACCESSORY CIRCUIT
BREAKERS OR OTHER CIRCUITRY THROUGH ADDITIONAL 12-VOLT EQUIP-
MENT.
Battery Switches
There are three “ON” - “OFF” battery switches located on the front of the TABS unit which is
located behind a hatch at the starboard rear of the cockpit. The switches are activated using
special keys that are attached to the unit. The port battery switch is labeled “Port” and activates
the port engine, the starboard battery switch is labeled “Starboard” and activates the starboard
engine and the center battery switch is labeled “House” and activates the 12-volt breaker panel
in the cabin and all other 12-volt accessories. The house battery switch key may be different from
the engine switch keys, allowing the house battery to be activated without providing access to
the engine starting batteries. Make sure that all three switches are activated whenever the engines
are running to ensure that all 12-volt accessories will operate when they are needed. Red LED
lights above each switch indicate that the switch is on. The top LED light will be lit when the
engines are running or when the parallel switch is engaged.
The TABS controls the charging of all three batteries whenever one or both of the engines is
operating. When one or both engines is started, the engine alternator(s) starts to recharge the
batteries. This charging current passes through the TABS sensing circuit. This circuit senses the
charge and switches relays to connect the “House” battery in parallel with the engine batteries.
Thus the charge from the engines is split between the batteries, with the lowest battery receiving
the most charge. When the engines are turned off, the charging stops and the sensing circuit turns
off the relays, disconnecting the “House” battery from the engine starting batteries, thereby
automatically isolating the batteries from one another.
When in port or at anchor, the switch that supplies the port engine and the switch that supplies
the starboard engine should be off. Only the center battery switch that activates the “House”
battery should be on. This will keep the engine starting batteries in reserve for starting the
engines. All three battery switches should be in the “OFF” position when leaving the boat
unattended.
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