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5. Wiring Diagrams (see “Wiring Diagrams” section) have been
supplied showing the two most common types of
connections between the water heater and the power supply.
You can easily see which type connection you have by
removing the junction box cover on top of the water heater.
• Two Wire Connection Diagrams: is the most common
requiring you to simply connect red to red, black to
black, and the ground wire to the green ground screw
in the junction box of the water heater.
• Three Wire Connection Diagram: is used when you
are connecting the water heater to a power supply
that has a “Time Clock” or “Off Peak” meter. To make
these connections refer to block 1 or 2 in this wiring
diagram for the type of system you have.
NOTE: If you have purchased a three wire connection water
heater but you are not on a “Time Clock” or “Off Peak” meter
and have a standard two wire connection power supply,
simply follow the connection diagram in block 3 of the three
wire connection diagram.
6. Use wire nuts and connect the power supply wiring to the
wires inside the water heater’s junction box.
7. The water heater must be electrically “grounded” by the
installer. A green ground screw has been provided on the
water heater’s junction box. Connect ground wire to this
location.
8. Replace the wiring junction cover using the screw provided.
FIGURE 23.