Bradford White VR-150-(kW) Installation And Service Manual page 9

1. Use copper conductors only. All wiring between the appliance and field installed devices shall be
made with copper wire suitable for at least 75° C (167° F) temperature rating. If the wiring from an
old water heater installation was aluminum, replace the old wire with copper wire.
2. The factory internal wiring is attached to a terminal block inside the unit. The branch circuit is
connected to the terminal block through an opening provided on the top of the water heater electrical
access panel.
3. Line voltage wire exterior to the appliance must be enclosed in approved conduit or approved metal
clad cable.
4. To avoid serious damage, DO NOT energize the appliance until the system is full of water. Ensure
that all air is removed from the storage tank and piping before beginning initial operation. Operation
of a water heater without a completely filled tank may result in serious damage to the appliance and
heating element burn out.
5. The water heater should be connected with a separate grounded branch circuit with over current
protection and disconnect switch. The water heater should be grounded in accordance with national
and local codes. A ground terminal is provided for ground connection only.
6. Provide the appliance with proper overload protection in the branch circuit. It is suggested that the
electrician size the branch circuit at 125 percent of the heater ampere rating and further increase wire
size as necessary to compensate for voltage drop in long runs. Branch circuit voltage drop should not
exceed 3% at the heater.
7. Voltage applied to the heater should not vary more than +5% to -10% of the model and rating plate
marking for satisfactory operation.
8. A wiring diagram is provided with the water heater for the electricians use.
WATER HEATER IS EQUIPPED FOR OPERATION ON ONE VOLTAGE ONLY. Check the rating
plate label for the correct voltage and phase. DO NOT use this water heater with any other voltage other than
the voltage specified on the rating plate label. Failure to use the correct voltage can cause problems that can
result in death, serious bodily injury or property damage.
WARNING:
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