Installation Guide

Rinnai Tankless Water Heater Installation and Operation Manual 57
Post-Power Supply Connection Checklist
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Confirm that the electricity is supplied from 120 VAC, 60 Hz power source and is in a properly
grounded circuit.
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Confirm that an extension cord or an adapter plug has NOT been used with the water heater.
When connecting the power supply, follow these guidelines:
• Do not rely on the gas or water piping to ground the water heater. Ground locations are provided
inside the water heater.
• The water heater requires 120 VAC, 60 Hz power from a properly grounded circuit.
• If using the 6.5 ft (2.0 m) power cord supplied with the water heater, plug it into a standard 3
prong 120 VAC, 60 Hz properly grounded wall outlet. The supplied power cord is outdoor rated
and can be used outdoor.
• For outdoor installation, a field-supplied disconnect switch may be installed for the incoming 120
VAC power. The switch should be a type that is suitable for outdoor use. Check the National
Electrical Code, ANSI/NFPA 70 and your local codes for a proper switch type to use in your
area. Power connections must be protected from the weather.
• The wiring diagram is located on the inside of the water heater front cover.
WARNING
• Do not use an extension cord or adapter plug with this appliance.
• The water heater must be electrically grounded in accordance with local codes and ordinances
or, in the absence of local codes, in accordance with the National Electrical Code, ANSI/ NFPA
No. 70.
• Indoor water heaters are equipped with a three-prong (grounding) plug for your protection
against shock hazard and should be plugged directly into a properly grounded three-prong
receptacle. Do not cut or remove the grounding terminal from this plug.