Electrical System - Westerbeke 15.0BTD60-HERTZ Operator's Manual

ELECTRICAL SYSTEM
Engine 12-Volt DC Control Circuit
The engine that drives the generator end has a 12-Volt DC electrical control circuit, as shown on the wiring
diagrams which follow on pages 22 and 23. Refer to these diagrams when troubleshooting or servicing
electrical components on the engine.
CAUTION
To avoid damaging the battery's charging circuit, never shut off the engine's battery switch
while the engine is running.
However, shut off the engine's battery switch 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 90 -
125 Ampere-Hours (minimum) for the generator set covered by this manual.
CAUTION
When quick-charging the battery with an external charger, be sure to disconnect the battery
cables from the battery. Leaving the charging circuit connected while quick-charging will
damage the alternator's diodes.
Alternator
CAUTION
When testing the alternator circuit (charging circuit), do not use a high-voltage tester such as
a megger; damaged diodes could result.
When operating the generator, do not disconnect the positive battery terminal from the B ter-
minal on the alternator, nor disconnect the negative battery terminal from the ground.
When cleaning the engine/generator with a steam cleaner, be careful to keep steam away from
the alternator.
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