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Electrical Connection
Installation Codes:
Follow the requirements of the local authority having jurisdiction. In the absence of such requirements, follow the
latest edition of the National Electrical Code ANSI/NFPA 70.
Do not plug electrical power to the unit until all plumbing and gas piping is complete and the water heater has
been filled with water.
The use of a surge protector is recommended to protect from power surges.
Do not connect 220-240V AC to this unit. It will damage the water heater and void the warranty.
Do not disconnect the power supply when the unit is in normal operation.
If there is a power failure in cold weather areas, the freeze prevention system in the water heater will not operate
and may result in freezing of the unit. In cold weather areas where power failures are common, you must
completely drain the unit to prevent damage if the power will be off for any extended period of time. Damage
caused by freezing is not covered under warranty.
A battery back-up may be used to supply hot water during periods of power outages. We recommend a computer-
grade UPS (uninterruptable power supply) with at least a 600VA rating for extened coverage.
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Grounding and Surges
Label all wires prior to disconnection when servicing controls. Wiring error can cause improper and dangerous
operation. Verify proper operation after servicing.
A means for switching off the 120 VAC power supply must be provided.
Wire the heater exactly as shown in the wiring diagram.
Check all new water piping for leaks. Repair as needed.
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The water heater requires an electrical power supply of 120 VAC/60Hz, and it must be properly grounded to
function.
Please refer to the Wiring Diagram. Note: There is a copy located on the inside of the front panel of the appliance.
Max 100ft Run.
AWG #18 Wire. (wiring is not supplied in unit.)
Parallel or Serial connection are allowed.
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Wiring Optional Remote Controller(s)
CAUTION
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The water heater must be electrically grounded.
Do not rely on the gas or water piping to ground the metal parts of the water heater, because plastic pipe may
isolate the water heater electrically. Service and maintenance personnel who work on or around the water
heater may be standing on wet floors, and could be electrocuted by an un-grounded water heater.
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WARNING
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Do not make short circuit by contacting the contacts between two wires during installation.
All units come with a factory installed 3-pronged power (grounded) plug. It is required to run a dedicated
electrical line to the water heater to prevent electrical interference.
WARNING
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