Westerbeke 9.0 BCG Technical Manual page 202

CAUTION
Under no circumstances attempt to increase the no-load voltage by increasing the gap be-
tween the laminated steel bar and the transformer core without the use of shims. Magnetic
forces created within the transformer during generator operation may close the air gap and
reduce no-load voltage output.
4. To remove the laminated steel bar, remove the two upper securing bolts from the compound transformer
and lift the bar from the transformer. The addition of shim thickness will raise the no-load voltage and,
conversely, the removal of shim thickness will lower the no-load voltage.
Varying shim thickness by .001 inch (0.025 mm) will change the no-load voltage by 4 to 6 volts.
Optional VoHage Regulator
An optional solid state voltage regulator board #34410 is available for use with the BTG 9.0KW generator.
When this board is installed and the regulation switch is moved to the ELEC position, the regulator works
together with the standard compound transformer regulator to regulate generator voltage output. Refer to
the wiring diagram on page 184-(F2}.
Installation
1. The regulator is mounted using existing tapped holes in generator case. Use (2) M4 x 0.7 millimeter screws,
each 15 mm long, with lock washers to mount the regulator board.
2. Take the 6-prong generator plug and plug it into the receptacle on the regulator board.
NOTE: The plug is shaped so it will only engage in the regulator's receptacle in one direction.
Check this and insert correctly.
3. Before moving the selector switch to ELEC, ensure the no-load voltage produced by the generator is
properly adjusted with the selector in COMP position, following procedures for no-load voltage adjust-
ment.
4. With generator no-load voltage adjusted to 112-116 volts, move the selector switch into the ELEC posi-
tion. Adjustthe regulator board potentiometer to set no-load voltage at 120 volts, 61.5-62 hertz (110 volts,
51.5-52 hertz). Generator voltage output should be within
±
5 percent from no-load to full-rated gener-
ator output.
120V60Hz 120f240V 60Hz
0 0 D
TO FRAME
0
<l
n
TO FRAME
' 1 1
0
L1
N
0
L2
0
0
0
0
0 0
0
0
N
L,
Westerbeke Generators 196