Servicing should only be performed by a Qualified Service Agent
5
INSTALLATION CONSIDERATIONS
ELECTRICAL REQUIREMENTS
Grounding
Review the electrical ground requirements given in the Instruction Manual that came with
the water heater and ensure the water heater has been properly grounded.
The water heater must be grounded in accordance with the National Electric Code and/or
local codes. These codes must be followed in all cases.
The water heater must be connected to a grounded metal, permanent wiring system; or an
equipment grounding conductor must be run with the circuit conductors and connected to
the equipment grounding terminal or lead on the water heater.
Service Note: The water heaters covered in this manual are equipped with electronic
controls that may experience erratic operation if the water heater is not properly grounded.
These water heaters are also equipped with a LWCO (low water cut off). Some models will
also be equipped with a powered anode rod. LWCO devices and powered anode rods
require an adequate earth ground to work properly. See pages 47 and 48.
Power Supply
Review the electrical requirements listed on the water heater’s rating label and in the
Instruction Manual that came with the water heater. Ensure the branch circuit supplying
power to the water heater is within these requirements and properly connected.
Ensure the power supply phase (single or three phase / 1Ø, 3Ø) and power supply voltage
match the water heater’s rating label. Some of the commercial electric water heater models
covered by this Service Manual are phase convertible. Voltage and KW conversions ARE
NOT permitted.
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