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Electrical System
6.3 Batteries & Battery Switches
There are three batteries and four battery switches
located in the head compartment. There is a bat-
tery switch for each engine, a switch for house,
accessory circuits and an emergency battery
parallel switch. Battery switches are identied by
red knobs and the parallel switch knob is yellow.
Automatic battery isolator/relays (DVSR) manage
the charging current for the engine and house
batteries. Whenever the engines are running, the
isolator/relays automatically sense the condition
of each battery and direct the available current
to the batteries that require charging. The port
and starboard engine batteries can be temporar-
ily connected in parallel by activating the EMERG
PARALLEL switch to provide additional starting
current for each engine.
When in port or at anchor, the port and starboard
engine battery switches should be OFF. Only the
battery switch that activates the house and ac-
cessory circuits should be ON. This will keep both
engine starting batteries in reserve for starting the
engines. If the house battery becomes discharged
to the point that accessories stop operating prop-
erly, the engines can be started to recharge the
house battery.
Notice:
Current is supplied to the automatic oat
switches for the bilge pumps when the
batteries are connected and the battery
switchesareo.
Once the engines are running, the alternators
will charge each engine starting battery. As the
voltage in the battery raises to a preset level, the
automatic isolator relay between each engine bat-
tery and the house battery will close and direct
charging current to the house battery. The engine
starting and house batteries will continue to be
charged until the engines are shutdown and the
automatic relays open, isolating the house battery
from the engine batteries.
6.4 Parallel Switch & Dead Batteries
Dead Engine Starting Battery
In the event of a dead starting battery for an en-
gine, the engine starting batteries can be placed
in a temporary parallel conguration. This allows
you to start an engine from both engine starting
batteries combined.
To connect the batteries in parallel to start the
engines, make sure both engine battery switches
are on, then turn the EMERG PARALLEL switch on
Battery Switch Panel, Battery Switches, Parallel Switch Main Circuit Breakers & Accessory Breakers
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