Thermador PRO-HARMONY PRD30 Installation Manual page 23

3-Wire Lead Connection
4-Wire Connection
Page 20
• 3-CONDUCTOR CORD – WHERE LOCAL CODES AND ORDINANCES PER-
MIT GROUNDING THROUGH NEUTRAL, AND CONVERSION OF SUPPLY
TO 4 WIRE IS IMPRACTICAL, UNIT MAY BE CONNECTED TO THE POWER
SUPPLY WITH A 3-POLE, 3-CONDUCTOR CORD KIT RATED 125/250
VOLTS, 50 AMPERES, AND MARKED FOR USE WITH RANGES. The cord
kit must be attached to the range junction box with a strain relief which will fit a
1" diameter hole. If not already equipped, the cord must have 1/4" faston
closed-loop lugs attached to the free ends of the individual conductors, prefer-
ably soldered in place.
Installer - show the owner the location of the circuit breaker or fuse. Mark it for easy
reference.
A 3- or 4-conductor supply may be connected to the terminal block.
1. Remove upper nuts only from the terminal block studs. Do not remove nuts
which secure range internal wiring leads.
2. Secure the neutral, grounded wire of the supply circuit, to the center stud of the
terminal block with nut. (See Figure 12).
3. Secure the L1 (black) and L2 (red) power leads to the outside terminal block
studs (brass colored) with nuts.
4. Tighten nuts securely.
L1 Black
1. Remove upper nuts only from the terminal block studs. Do not remove lower
nuts which secure range internal wiring leads.
2. Remove ground strap screw and bend the strap up as shown in Figure 13.
3. Secure the neutral wire to the center stud of the terminal block with nut.
Upper Nut
Cupped Washer
Supply Wire
Flat Washer
Figure 11: Conductor Securement
L2 Red
Neutral
White
Figure 12: 3 Wire Connection