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W1756/W1757 43" Wide-Belt Sander
ELECTRICAL
Converting to 440V
To convert this machine for 440V three-phase operation,
you must purchase two thermal overload relays, Part
X1756037-1 and X1756037-2, or purchase the 440V
Conversion Kit, Part X1756037 (refer to Pages
57 & 58).
If you do not have three-phase power available for your
wide-belt sander, you must install a phase converter
(Refer to Phase Converter sub-section, Page 14
for
requirements and setup).
To convert the sander
for 440V, do these steps:
1. DISCONNECT THE SANDER FROM THE POWER SOURCE!
2. Open the electrical box located on the back of the
machine.
3. On the transformer, remove the wire connected to
the 220V terminal for your model of sander, and
connect it to the 440V terminal, as shown in
Figure
5 and in the illustrations on Page 54.
4. Refer to Figure 6 and open the main wiring box on
your machine.
5. Swap out the applicable thermal relays at the
locations shown in
Figure 6 or in the photo on Page
54, and set them to 16A and 3A.
— For the Model W1756 and W1757, use 440V
Conversion Kit #
X1756037 or purchase Part
X1756037-1 and X1756037-2,
and change out the two
relays.
6. Wire the sanding belt, feed belt, and table elevation
motors as shown on the diagrams on the inside of
each motor wire cover, or refer to the diagrams
shown on
Page 54, Motor and Transformer
Connections.
Figure 6. Thermal overload relays.
LR3D-216
Set to: 16A
Figure 5. Rewiring transformer from 220V
to 440V.
LR3D-086
Set to: 3A