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W1772/W1773 37" Drum Sander
ELECTRICAL
Rewiring W1773 to 440V
Rewiring your Model W1773 to 440V requires you to
replace the existing control box 220V main panel with a
440V main panel and rewire the sanding motor and feed
motor.
The 440V 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 440V 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 75 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 220V
main panel with the 440V main panel from the 440V
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 440V:
Feed Motor Relay = 0.65A
Sanding Motor Relay = 21.5A
8. Have the wiring job inspected by a qualified electri-
cian.
Figure 5. W1773 3-phase 440V thermal
overload relay values.
Feed Drum
Relay
Sanding Drum
Relay
Figure 4. W1773 control box main panel,
3-phase 440V.
Main Panel