Southbend TVES-30SC - Manual (Page 27)

E LECTRIC T RU V ECTION O VENS
A DJUSTMENTS
O WNER ’ S M ANUAL 1194659 REV 1 P AGE 27
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CONVERSION FROM SINGLE-PHASE TO THREE-PHASE POWER (OR VICE VERSA)
Ovens are shipped wired for either single-phase or three-phase power according to the original factory
order. If the oven installation requires changing the type of power used by the oven, follow the procedure
below. The following drawing shows the locations of items referred to in the procedure.
A
Contactor
1. If the oven is connected to a power supply, DISCONNECT OVEN FROM POWER SUPPLY.
2. Remove the element-cover box from the back of the oven. (An oven built for three-phase power will
have a small jumper wire attached with the element box cover to the back of the oven. Keep this wire.)
3. Locate and remove the four screws that secure the lower front panel (items “A” in the drawing above).
Lift up the panel and pull it forward to remove it, then set it aside.
4. Locate and remove the two now-accessible screws that secure the lower front corner of the side panel.
5. Locate and remove the three screws that secure the back edge of the side panel to the oven (items “B”
in the drawing above). Remove the side panel and insulation and set them aside.
6. Locate the wires running from the supply-power terminal block to the contactor. If converting from
three-phase to single-phase power, remove the wire T2 (as shown in the following drawing) and go on
to the next step. If converting from single-phase to three-phase power, locate the wires running from
the contactor to the elements. Attached to those wires (with a wire tie) will be two wires that are not
being used. Use the shorter of the two extra wires to make the additional connection (T2) shown in the
following drawing. Keep the longer wire to use in the next step. (Note: If you are changing the phase-
wiring of a 415V oven, refer to the corresponding wiring diagram for conversion. See page 30.)