Southbend SL-Series - Manual (Page 32)

E LECTRIC C ONVECTION O VENS
OPERATOR’S MANUAL 1181958 REV 5 (4/14) PAGE 32 OF 47
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.
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 now-accessible screw that secures the lower front corner of the side panel.
5. Locate and remove the five 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 36.)