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W1772/W1773 37" Drum Sander
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Rewiring.W1773.to.480V
Rewiring your Model W1773 to 480V requires you to
replace the existing control box 240V main panel with a
480V main panel and rewire the sanding motor and feed
motor.
The 480V conversion kit can be purchased as #X1773553 by
calling (360) 734-3482.
The rewiring job must be inspected by a qualified electri-
cian before connecting to power.
To.rewire.the.Model.W1773.for.480V.operation,.do.these.
steps:
1..
DISCONNECT THE SANDER FROM THE POWER SOURCE
!
2.
Rewire both the sanding drum and feed motors accord-
ing to the diagrams on the inside of the junction box
cover.
Note:
These drawings are also shown on
Page 54
&
55
for your reference, but always use the drawings in the
junction box cover, as they will reflect any changes to
the machine since the time of writing.
3.
Open the control panel and familiarize yourself with
Figure.77
on
Page.50.
for component locations.
4.
Keeping track of the wire locations, disconnect all
power and motor wires, so the main panel can be com-
pletely removed.
5.
Remove and replace the existing control box 240V
main panel with the 480V main panel from the 480V
conversion kit (
Figure.4
).
6.
Connect the power and motor wires to the new main
panel in the same manner that they were removed
from the old panel.
7.
Make sure the thermal relays are set to the following
values for 480V:
Feed Motor Relay = 0.8A
Sanding Motor Relay = 20.7A
8.
Have the wiring job inspected by a qualified electri-
cian.
Figure.
5. W1773 3-phase 480V thermal
overload relay values.
Figure.4
. W1773 control box main panel,
3-phase 480V.
Sanding Motor
Overload Relay
Feed Motor
Overload Relay
