Electrical Wiring - Noritz NR66-SV Installation Manual

11.

Electrical Wiring

Do not connect electrical power to the unit until all electrical wiring has been completed.
Disconnect Power
This appliance must be electrically grounded in accordance with local codes, or in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70. In Canada, the latest CSA C22.1 Electrical Code.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improp-
er and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
Electrical Shock Hazard
Do not turn power on until electrical wiring is finished. Disconnect power before servicing.
Failure to do so may result in death or serious injury from electrical shock.
• The electrical supply required by the water heater is 120V
AC at 60 Hz.
The power consumption may be up to 141W.
Use an appropriate circuit.
• Do not disconnect the power supply when not in use. When
the power is off, the freeze prevention in the water heater
will not activate, resulting in possible freezing damage.
Ground
• To prevent electrical shock, provide a ground with resistance less than 100 . An electrician should do this work.
• A grounding screw is provided on the back in the junction box.
Do not connect the ground to the city water or gas piping. Do not tie the ground to a telephone line.
Breaker Installation
• Mount a device which shuts off the electrical path automatically (leakage breaker) when electrical leakage is detected.
1. Remove the screw (one) of the junction box and open the
cover of the junction box.
2. Connect the grounding wire to the ground screw in the cover.
3. Crimp the outdoor power cable to the power cable of the unit.
Note: When installing the water heater outdoors, either use the
included power cord with an approved outdoor outlet or
hard wire the appliance. (-SV type only.)
Electrostatic discharge can affect electronic components. Take precautions to prevent electrostatic
discharges from personnel or hand tools during the water heater installation and servicing to pro-
tect product's electronic control.
WARNING
• Do not let the power cord contact
CAUTION
Consult a qualified electrician
for the electrical work.
the gas piping.
Tie the redundant power cord out-
side the water heater. Putting the
redundant length of cord inside the
water heater may cause electrical
interference and faulty operation.
Junction Box
Ground
Power Cord
21