Installation manual

DC CIRCUIT /BATTERY
DESCRIPTION
The DC Circuit on the 5.0 KW BCD functions to start,
operate and stop the generator engine. The circuit is best
understood
by reviewing the DC WIRING SCHEMATICS.
The engine's
DC wiring is designed with three simple basic
circuits: preheat, start, and stop.
Engine 12·Volt DC Control Circuit
The engine has a 12 volt DC electrical control circuit that is
shown on the wiring diagrams that follow. Refer to these
diagrams when troubleshooting
or when servicing the DC
electrical system on the engine.
A CAUTION: To avoid damage to the battery charging
circuit, never shut off the engine battery switch while
the engine is running. Shut off the engine battery switch,
however, to avoid electrical shorts when working on the
engine's electrical circuit.
Battery Specification
The minimum recommended capacity of the battery used in
the engine's 12-volt
DC control circuit is 300-600 Cold
Cranking Amps
CCCA).
Battery Care
Review the manufacturer's recommendations and then
establish a systematic maintenance schedule for your
engine's starting batteries and house batteries.
o Monitor your voltmeter for proper charging during engine
operation.
o Check the electrolyte level and specific gravity with a
hydrometer.
o Use only distilled water to bring electrolytes to a proper
level.
o Make certain that battery cable connections are clean and
tight to the battery posts (and to your engine).
o Keep your batteries clean and free of corrosion.
BATTERY CHARGING CIRCUIT
The engine supplies up to a 17 amp charge from the voltage
regulator to the engine's battery. This charge passes thru a
30 amp fuse (and the ships battery switch).
TESTING THE CIRCUIT
If the battery is not charging, check the fuse. To test the
circuit, remove the fuse and test with a voltmeter between
the fuse holder connection and the ground. With the engine
running, it should indicate 13-14 volts.
if only the battery
voltage is indicated, check the terminal connections at the
battery.
Engines & Generators
20