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Adjustments (Generator)
Once the diesel generator set has been placed in operation, there may be adjustments required for engine
speed (hertz) during the engine's break-in period (first 50 hours) or after this period. A no-load voltage
adjustment may also be required in conjunction with the engine's speed adjustment.
These are not
warrantable adjustments as they relate to normal break-in and maintenance.
II
CAUTION
II
When starting the generator, all AC loads, especially large motors, should be switched off until
the engine has come up to speed and, in cold climates, starts to warm up. This precaution will
prevent damage caused by unanticipated operation of AC machinery and will prevent a cold
engine from stalling.
Generator Frequency Adjustment (Hertz)
Frequency is a direct result of engine/generator speed, as indicated by the following:
When the generator is run at 1800 rpm, the AC voltage output frequency is 60 Hertz.
When the generator is run at 1500 rpm, the AC voltage output frequency is 50 Hertz.
Therefore, to change the generator's frequency, the engine speed must be changed. To accomplish the
frequency change, perform the following:
1. Connect the AC output leads to the AC terminal block in accordance with the AC voltage connections
diagram specified for your generator set, and change the hertz connection to the capacitor.
These
connections are illustrated in the "BC GENERATOR" section ofthis manual.
2. Adjust the engine's speed to obtain the frequency corresponding to the voltage selected by adjusting the
stop bolts and positioning the throttle arm against these stop bolts to either increase or decrease engine no-
load speed to adjust hertz produced.
To arrive at the appropriate frequency, either monitor the speed of the engine/generator with a
tachometer, or monitor the frequency with a frequency meter, the latter method being the more precise of
the two.
Fuel Shut-off Solenoid - Installation Instructions
The fuel shut-off solenoid #037100 is mounted in a threaded boss on the engine's block just aft of and
below the engine's fuel injection pump. Proceed as follows when installing a replacement or new fuel
shut -off solenoid.
WESTERBEKE GENERATORS
68
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