Thermador PROFESSIONAL PRO HARMONY PRD305PH Manuel D'installation page 17

4. Secure the neutral, grounded wire of the supply circuit,
to the center stud of the terminal block with nut (see
Figure 10).
Red/L1
Wire
Green/
Ground Wire
5. Secure the L1 (red) and L2 (black) power leads to the
outside terminal studs (brass colored) with nuts.
6. Remove green ground screw located beneath the
terminal block. Discard white wire.
7. Secure the bare copper ground lead to the range
chassis using the ground screw previously used for the
white wire. Be sure that neutral and ground terminals
do not touch.
8. Tighten all connections securely.
9. Reinstall the terminal block cover.
3-Wire Lead Connection
This appliance is manufactured ready to install with a
supplied 4-wire cord set with plug attached to the
appliance. However, where local codes and ordinances
permit grounding through neutral, and conversion of supply
to 4-wire is impractical, the unit may be connected to the
power supply with a Listed (UL, CSA, ...) 3-POLE, 3-
CONDUCTOR cord kit rated 125/250 VOLTS, 50
AMPERES DEDICATED CIRCUIT, and marked for use
with ranges.
If a 3-wire power supply connection must be used, the 4-
wire cord set must be removed from the terminal block. It is
the responsibility of the installer to provide the proper wiring
components (cord, wires, etc.) and complete the electrical
connection as dictated by local codes and ordinances, and/
or the National Electrical Code.
The cord kit must be attached to the range back panel with
a strain relief which will fit a 1" (25.4 mm) diameter hole. If
not already equipped, the cord must also have 1/4'' (6 mm)
faston closed-loop lugs attached to the free ends of the
individual conductors, preferably soldered in place.
1. Locate the terminal block on the rear of the unit and
remove cover.
Black/L2
Wire
White/
Neutral Wire
Figure 10: 4-Wire Connection
2. Remove upper nuts only from the terminal block studs.
Do not remove nuts which secure range internal wiring
leads.
3. Mount strain relief (not provided with range) into the 1"
(25.4 mm) diameter hole in the back panel located
below the terminal block (see Figure 11). Route wires
up through strain relief.
Terminal Block Terminal Block Terminal Block
Strain Relief Strain Relief
4. Secure the neutral, grounded wire of the supply circuit,
to the center stud (silver colored) of the terminal block
(see Figure 12).
5. Secure the L1 (red) and L2 (black) power leads to the
outside corresponding terminal block studs (brass
colored).
6. Secure one end of the mounted looped neutral wire,
located beneath terminal block, to the center stud of
the terminal block with nut and keep the other end of
the wire screwed into the back of the range.
7. Tighten nuts securely.
Red/L1
Wire
Ground link
provided on range
8. Reinstall the Terminal Block Cover.
Figure 11: Strain Relief Location
Black/L2
Wire
White/
Neutral Wire
Figure 12: 3-Wire Connection
English 14