Monterey Boats 350 Sport Yacht Owner'S Manual Download

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350 SPORT YACHT

Chapter 4:

ELECTRICAL SYSTEM

4.1 General

Your Monterey is equipped with 120-volt AC and
12-volt DC electrical systems. The AC system
can draw current from one of two sources, either
shore power outlets at dockside or the generator.
The DC system draws current from on board bat-
teries.

The 12-volt batteries in your boat are usually the
lead-acid type. They will require similar mainte-
nance as those found in automobiles.

4.2 12-Volt System

The 12-volt system is a standard marine system.
There are four batteries, one for the starboard
engine, one for the port engine, one for the house
and accessory circuits and one for the generator.
The batteries themselves can be charged by the
engines or by the battery charger when hooked
to shore power or when operating the optional
generator.

An automatic battery isolator/relay manages the
charging current for the starboard engine and
house batteries. Whenever the starboard engine
is running, the isolator/relay automatically senses
the condition of each battery bank and directs
the available current to the batteries that require
charging. The port engine battery is charged by
the port engine. The system is equipped with a
battery parallel feature that will connect both en-
gine starting batteries in parallel for extra battery
power while starting the engines. The battery
parallel switch is activated by a momentary rocker
switch located in the helm switch panel. When
the switch is pressed, a relay is engaged that
connects both engine starting batteries. When the
switch is released, the relay is deactivated and
the batteries are isolated.

Most 12-volt power is distributed to the 12-volt
accessories through individual circuit breakers lo-
cated in the 12-volt breaker panels in the cabin,
at the helm and in the battery switch panel in the
cockpit wet bar. Main breakers located in the
battery switch panel protect the house, helm sys-
tems and windlass from an overload. Other cir-

cuit breakers in the battery switch panel protect
the battery charger DC circuits, stereo and elec-
tronics memory, engine control memory, CO moni-
tors and the automatic switches for the bilge
pumps and the high water alarm. Main breakers
located on each engine protect the ignition, charg-
ing systems and gauges. Some 12-volt accesso-
ries are operated directly by a circuit breaker in
the cabin breaker panel while others are operated
by a switch fed by the panel breakers. Most of
the 12-volt accessories on the deck and in the
cockpit are operated by switches in the helm
switch panel.

Battery Switches

There are four “ON” - “OFF” battery switches
located on the battery switch panel in the cock-
pit wet bar. The battery switch labeled “Port En-
gine” activates the port engine, the battery switch
labeled “Starboard Engine” activates the starboard
engine, the battery switch labeled “House” acti-
vates the DC breaker panel in the cabin and all
other 12-volt accessories, the switch labeled
“Generator” activates the optional generator. Make
sure that the two engine switches and the House
switch are activated whenever the engines are
running to ensure that all 12-volt accessories will
operate when they are needed.

Battery Selector Switches, Circuit Breakers and Charging Relay